Negative pressure wound therapy device

Abstract

The present invention provides a system, apparatus, or method for efficiently adjusting TNP prescriptions and delivering effective TNP therapy. [Solution] A negative pressure device having a negative pressure source, a canister in fluid communication with the negative pressure source, and a conduit connected to a wound dressing provides negative pressure to the space beneath the wound dressing. Some arrangements of the negative pressure source may have a first noise reduction chamber and a second noise reduction chamber located downstream of the outlet of the pump and in fluid communication with it. The first and second noise reduction chambers may be configured to reduce the level of noise generated by the pump and / or pressure pulses in the fluid advancing through the negative pressure source.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims priority to UK Patent Application No. 2104021.7, filed on March 23, 2021, and UK Patent Application No. 2116401.7, filed on November 15, 2021, each of which is hereby incorporated by reference as if fully set forth herein. The benefits of priority are claimed under appropriate legal bases including, but not limited to, 35 U.S.C.§119(e).

[0002] The arrangements described herein relate to devices, systems, and methods for the treatment of wounds, for example, devices, systems, and methods that include a source of negative pressure for use with a negative pressure wound therapy dressing.

Background Art

[0003] Description of Related Art A number of different types of wound dressings are known to assist in the healing process of humans or animals. These different types of wound dressings include different types of materials and layers, such as gauze, pads, foam pads, or multilayer wound dressings. Topical negative pressure (TNP) therapy, also sometimes referred to as vacuum - assisted closure therapy, negative pressure wound therapy, or decompression wound therapy, is widely recognized as a beneficial mechanism for improving the healing rate of wounds. Such therapy is applicable to a wide range of wounds, such as surgical wounds, open wounds, and abdominal wounds. TNP therapy helps wound closure and healing by reducing tissue edema, promoting blood flow, stimulating the formation of granulation tissue, removing excessive exudate, and can reduce the bacterial load. Thus, it reduces the risk of infection in the wound. Moreover, TNP therapy reduces external interference to the wound and promotes faster healing.

[0004] Overview of Some Exemplary Arrangements The systems, methods, and apparatus of this disclosure each have several innovative aspects, implementations, or forms, and not just one of them is responsible for the desirable attributes disclosed herein.

[0005] Disclosed herein are arrangements for a negative pressure wound therapy system, which may include one or more pump assemblies, each including a negative pressure source configured to be fluidly connected to a wound covered with a wound dressing; a canister, connectable to the pump assemblies and configured to collect fluid aspirated from the wound as a result of negative pressure being supplied to the wound by the negative pressure source; and a canister release mechanism, which is connected to the pump assemblies and includes an actuator connected to one or more movable latches, configured to cause the pump assemblies to disengage the canister from the pump assemblies. In some arrangements, one or more latches may be configured to move between a first position in which one or more latches secure the canister to the pump assemblies and a second position in which one or more latches release the canister from the pump assemblies when the actuator is pressed.

[0006] Any arrangement, system, and method of using the negative pressure wound therapy apparatus and components of the negative pressure wound therapy apparatus disclosed herein, in any combination with any other steps, functions, components, and / or details of any other arrangement disclosed herein, additional arrangements include one or more of the following steps, features, components, and / or details: further including a cap connectable to an opening on a canister; further including a filter positioned within or supported by the cap; the cap including a shield configured to overlap at least a portion of the filter so as to prevent exudate in the canister from splashing onto at least a portion of the filter; the shield overlapping at least 40% of the surface area of ​​the first main surface of the filter; one or more latches configured to engage with the cap connected to the canister in a first position and to release the cap connected to the canister in a second position; and a canister release mechanism pumping the canister into the pump assembly. The canister release mechanism is configured to be released from the breech by the push of a single button, the single button being supported by the external surface of the housing of the pump assembly, and the canister release mechanism is configured to release the canister from the pump assembly with one-handed operation, the canister release mechanism includes a button, and an actuator is configured to move one or more latches from a first position to a second position when the button is pressed, the button being supported by the external surface of the housing of the device, and the canister release mechanism is configured to move the canister away from the pump assembly when the canister release mechanism is activated, and the canister release mechanism includes at least one projection configured to push the canister away from the pump assembly when the canister release mechanism is activated, and the pump assembly can be replaced without removing or opening the housing, such that the power socket and / or power cord can be replaced by replacing a panel that can be removed from the outside of the housing of the pump assembly.The pump assembly includes a power cord electrically connected to a panel that can be removed from the outside of the housing, the user interface of the pump assembly is located on the upper surface of the pump device oriented at an angle of no more than 35° to the horizontal plane, and / or the pump device has one or more tube supports that are detachably connected to the housing of the pump device, the tubes of the pump device extend through enclosed openings of one or more tube supports, and one or more tube supports have at least one additional opening from which the tubes can be detachably supported.

[0007] Disclosed herein are arrangements of a negative pressure wound therapy system, which may include one or more devices comprising a negative pressure pump operated by a pump motor, a battery, a display, a lower core assembly, and an upper support within a housing, and a canister connectable to the device and configured to collect fluid aspirated from a wound as a result of negative pressure being supplied to a wound covered with a wound dressing by the negative pressure pump, and a cap connected to an opening on the canister. In any arrangement disclosed herein, the lower core assembly may be configured to receive and support at least the pump motor and the battery. Furthermore, in some arrangements, the upper support may be connected to the lower core assembly, and the upper support extends over the lower core assembly. Furthermore, in some arrangements, the upper support may be configured to receive and support at least the display of the pump assembly, and the display may be removed from the pump assembly by removing the housing and by removing the upper support from the pump assembly.

[0008] Configurations of a negative pressure wound therapy system and methods of using the negative pressure wound therapy system and components of the negative pressure wound therapy system disclosed herein, in any combination with any other steps, functions, components, and / or details of any other configuration disclosed herein, an additional configuration includes one or more of the following steps, features, components, and / or details: further including a filter connected to or supported by a cap, the filter comprising a carbon filter, further including a hydrophobic filter connected to or supported by the cap, the cap comprising a shield configured to overlap at least a portion of the filter so as to prevent exudate in the canister from splashing onto at least a portion of the filter, the shield overlapping at least 40%, or at least 80%, or more of the surface area of ​​the first main surface of the filter, further including a canister release mechanism, the canister release mechanism comprising one or more latches configured to move between a first position in which one or more latches secure the canister to the device and a second position in which one or more latches release the canister from the device.

[0009] This specification discloses configurations for negative pressure wound therapy devices. In some configurations, the negative pressure wound therapy device may include: a negative pressure source, including an inlet and an outlet, configured to supply negative pressure to a wound covered with a wound dressing in order to draw fluid from the wound via a fluid channel; a first noise reduction chamber located downstream of the negative pressure source and within the fluid channel, and capable of fluid communication with the outlet of the negative pressure source; and a second noise reduction chamber located downstream of the negative pressure source and capable of fluid communication with the outlet of the first noise reduction chamber. The second noise reduction chamber may be different from the first noise reduction chamber. The first noise reduction chamber may have an inlet and an outlet and may be configured to reduce noise generated by the pump and / or the level of pressure pulses in the fluid advancing through the pump. The second noise reduction chamber may have an inlet and an outlet and may be configured to reduce noise generated by the pump and / or the level of pressure pulses in the fluid advancing through the first noise reduction chamber. The second noise reduction chamber may be spaced apart from the first noise reduction chamber.

[0010] Furthermore, configurations of negative pressure wound therapy devices are disclosed herein. In some configurations, the negative pressure wound therapy device may include a negative pressure source, including an inlet and an outlet, which is configured to provide negative pressure to a wound covered with a wound dressing in order to draw fluid from the wound via a fluid channel. The negative pressure wound therapy device may include a first noise reduction chamber located in the fluid channel downstream of the negative pressure source and in fluid communication with the outlet of the negative pressure source. The first noise reduction chamber may include an inlet and an outlet and may be configured to reduce noise generated as a result of drawing fluid from the wound. The negative pressure wound therapy device may also include a second noise reduction chamber located in the fluid channel downstream of the negative pressure source and in fluid communication with the outlet of the first noise reduction chamber. The second noise reduction chamber may include an inlet and an outlet and may be configured to reduce noise generated as a result of drawing fluid from the wound. In some configurations, the second noise reduction chamber may be spaced apart from the first noise reduction chamber and may be different from the first noise reduction chamber. Furthermore, a second noise reduction chamber can be positioned downstream of the first noise reduction chamber, in series with it. In some configurations, the second noise reduction chamber may be closer to the exhaust of the device than the first noise reduction chamber.

[0011] Arrangements, systems, and methods of using the negative pressure wound therapy apparatus and components of the negative pressure wound therapy apparatus disclosed herein, in any combination with any other steps, functions, components, and / or details of other arrangements disclosed herein, additional arrangements include one or more of the following steps, features, components, and / or details, wherein the negative pressure wound therapy apparatus further includes a foam positioned in at least one of the first and second noise reduction chambers, the first noise reduction chamber includes an inner wall extending over most of the distance between the first wall and the second wall of the first noise reduction chamber, positioned adjacent to the first wall or opposite the first wall, such that an opening is formed between the end of the inner wall and the second wall, the first noise reduction chamber is configured to form a passage between the inlet and outlet of the first noise reduction chamber, such that a fluid passing through the first noise reduction chamber is required to pass through an opening formed between the end of the inner wall segment and the second wall, and the internal volumes of the first and second noise reduction chambers are The device further includes a flow module comprising one or more pressure sensors, the volume of which is greater than the volume of which is in fluid communication with at least one inlet of one or two noise reduction chambers, and the volume of which is greater than the volume of which is in fluid communication with at least one outlet of the first or second noise reduction chambers, the device further includes a check valve positioned in the fluid flow path and configured to prevent fluid from flowing backward toward a negative pressure source, the first noise reduction chamber positioned upstream of the check valve and the second noise reduction chamber positioned downstream of the check valve, the negative pressure source comprising a motor, and the device further includes a power supply configured to power the motor, the device further includes a canister connectable to the device and configured to collect fluid drawn from a wound as a result of negative pressure being supplied to the wound by the negative pressure source, the device further includes a cap connected to an opening on the canister, the device further includes a filter connected to or supported by the cap, the filter comprising a carbon filter and / or connected to the cap,or further comprising a hydrophobic filter supported therein.

[0012] In some configurations, a negative pressure wound therapy device may include a device housing and a negative pressure source supported by the device housing and configured to provide negative pressure to a wound covered with a wound dressing. The device may include a canister configured to be in fluid communication with the negative pressure source and the wound dressing. The canister may include a canister housing configured to store the fluid aspirated from the wound. The canister may include a cap connected to the canister housing and configured to be connected to the device housing when the canister is detachably mounted to the device housing. The canister may include a fluid level sensor supported by the cap, which includes an electrode positioned on a support extending into the interior of the canister housing, and the electrode is configured to be in fluid communication with the fluid aspirated from the wound. The support may include a flange configured to prevent the fluid from splashing onto the electrode positioned on the support. The fluid level sensor may be configured to detect a completed electrical circuit when the fluid aspirated from the wound comes into contact with the electrode. The fluid level sensor may be configured to detect a full state of the canister when the electrical circuit is complete. The canister may include electronic circuitry configured to communicate (e.g., wirelessly) the state of the canister as detected by a fluid level sensor.

[0013] Also disclosed are arrangements of any of the devices described in the preceding paragraphs, and / or any of the systems or devices disclosed herein, as well as arrangements of methods for operating a kit including any of the devices described in the preceding claims and any of the wound dressing devices.

[0014] Features, components, or details of any of the device configurations and negative pressure wound therapy configurations disclosed herein, including but not limited to any of the device configurations and negative pressure wound therapy configurations disclosed herein, can be interchangeably combined with any other features, components, or details of any of the configurations disclosed herein to form new configurations and arrangements. [Brief explanation of the drawing]

[0015] [Figure 1A] Figure 1A illustrates a negative pressure wound therapy system. [Figure 1B] Figure 1B illustrates another negative pressure wound therapy system. [Figure 2A] Figure 2A is an isometric view of a negative pressure wound therapy device with a pump assembly and canister. [Figure 2B] Figure 2B is a front view of the negative pressure wound therapy device shown in Figure 2A. [Figure 2C] Figure 2C is a rear view of the negative pressure wound therapy device shown in Figure 2A. [Figure 2D] Figure 2D is a side view of the negative pressure wound therapy device shown in Figure 2A. [Figure 2E] Figure 2E is an isometric view of the rear and bottom of the negative pressure wound therapy device shown in Figure 2A. [Figure 2F] Figure 2F is a top view of the negative pressure wound therapy device shown in Figure 2A. [Figure 2G] Figure 2G is a cross-sectional view of the negative pressure wound therapy device shown in Figure 2A, viewed through the line 2G-2G in Figure 2F. [Figure 2H] Figure 2H is an isometric view of the negative pressure wound therapy device shown in Figure 2A, showing the canister removed from the pump assembly. [Figure 2I] Figure 2I shows the top surface of the negative pressure wound therapy device shown in Figure 2A, and illustrates the user interface. [Figure 3A] Figure 3A shows an exploded view of the pump assembly of the negative pressure wound therapy device shown in Figure 2A. [Figure 3B]FIG. 3B shows the canister of the negative pressure wound therapy device shown in FIG. 2A. [Figure 3C] FIGS. 3C, 3D, 3E, and 3F show partial exploded views of a portion of the pump assembly shown in FIG. 3A. [Figure 3D] The same as above. [Figure 3E] The same as above. [Figure 3F] The same as above. FIGS. 3G, 3H, 3I, 3J, and 3K show a portion of another arrangement of the pump assembly. [Figure 4A] FIGS. 4A, 4B, 4C, 4D, 4E, 4F, 4G, and 4H show the lower core assembly of the pump assembly shown in FIG. 3A. [Figure 4B] The same as above. [Figure 4C] The same as above. [Figure 4D] The same as above. [Figure 4E] The same as above. [Figure 4F] The same as above. [Figure 4G] The same as above. [Figure 4H] The same as above. [Figure 5A] FIGS. 5A, 5B, 5C, 5D, and 5E show the cap assembly of the canister shown in FIG. 3B. [Figure 5B] The same as above. [Figure 5C] The same as above. [Figure 5D] The same as above. [Figure 5E] The same as above. [Figure 6A] FIGS. 6A, 6B, 6C, 6D, 6E, and 6F show variations of filters that can be used in combination with any of the negative pressure wound therapy devices disclosed herein. [Figure 6B] The same as above. [Figure 6C] The same as above. [Figure 6D] The same as above. [Figure 6E] The same as above. [Figure 6F] The same as above. [Figure 7A]Figure 7A shows the tube support of the negative pressure wound therapy device shown in Figure 2A. [Figure 7B] Figure 7B shows a portion of the pump assembly shown in Figure 2A. [Figure 8A] Figures 8A, 8B, 8C, and 8D show variations of the handle that can be used in conjunction with any of the negative pressure wound therapy devices disclosed herein. [Figure 8B] Same as above. [Figure 8C] Same as above. [Figure 8D] Same as above. [Figure 9] Figure 9 illustrates a schematic diagram of the control system for a negative pressure wound therapy device. [Figure 10] Figure 10 illustrates another negative pressure wound therapy system. [Figure 11A] Figures 11A, 11B, 11C, and 11D show arrangements of canister assemblies that can be used in any of the pump assembly arrangements disclosed herein. [Figure 11B] Same as above. [Figure 11C] Same as above. [Figure 11D] Same as above. [Figure 12A] Figures 12A, 12B, 12C, and 12D show alternative arrangements of canister assemblies that can be used in any of the pump assembly arrangements disclosed herein. [Figure 12B] Same as above. [Figure 12C] Same as above. [Figure 12D] Same as above. [Figure 13A] Figures 13A and 13B show alternative arrangements of canister assemblies that can be used in any of the pump assembly arrangements disclosed herein. [Figure 13B] Same as above. [Figure 14A] Figures 14A, 14B, 14C, and 14D show alternative arrangements of canister assemblies that can be used in any of the pump assembly arrangements disclosed herein. [Figure 14B]Same as above. [Figure 14C] Same as above. [Figure 14D] Same as above. [Figure 15A] Figure 15A is a top, front, and left side perspective view of the arrangement of the device for applying negative pressure to a wound. [Figure 15B] Figure 15B is a front view of the arrangement of the apparatus shown in Figure 15A. [Figure 15C] Figure 15C is a rear view of the arrangement of the apparatus shown in Figure 15A. [Figure 15D] Figure 15D is a right side view of the arrangement of the apparatus shown in Figure 15A. [Figure 15E] Figure 15E is a left side view of the arrangement of the apparatus shown in Figure 15A. [Figure 15F] Figure 15F is a top view of the arrangement of the apparatus shown in Figure 15A. [Figure 15G] Figure 15G is a bottom view of the arrangement of the apparatus shown in Figure 15A. [Figure 16A] Figure 16A is a top, front, and left side perspective view of another configuration of a device for applying negative pressure to a wound. [Figure 16B] Figure 16B is a front view of the arrangement of the apparatus shown in Figure 16A. [Figure 16C] Figure 16C is a rear view of the arrangement of the apparatus shown in Figure 16A. [Figure 16D] Figure 16D is a right side view of the arrangement of the apparatus shown in Figure 16A. [Figure 16E] Figure 16E is a left side view of the arrangement of the apparatus shown in Figure 16A. [Figure 16F] Figure 16F is a top view of the arrangement of the apparatus shown in Figure 16A. [Figure 16G] Figure 16G is a bottom view of the arrangement of the apparatus shown in Figure 16A. [Figure 17A] Figure 17A is a top, front, and left side perspective view of another configuration of the device for applying negative pressure to a wound. [Figure 17B] Figure 17B is a front view of the arrangement of the apparatus shown in Figure 17A. [Figure 17C] Figure 17C is a rear view of the arrangement of the apparatus shown in Figure 17A. [Figure 17D] Figure 17D is a right side view of the arrangement of the apparatus shown in Figure 17A. [Figure 17E] Figure 17E is a left side view of the arrangement of the apparatus shown in Figure 17A. [Figure 17F] Figure 17F is a top view of the arrangement of the apparatus shown in Figure 17A. [Figure 17G] Figure 17G is a bottom view of the arrangement of the apparatus shown in Figure 17A. [Figure 18A] Figure 18A is a top, front, and left side perspective view of another configuration of a device for applying negative pressure to a wound. [Figure 18B] Figure 18B is a front view of the arrangement of the apparatus shown in Figure 18A. [Figure 18C] Figure 18C is a rear view of the arrangement of the apparatus shown in Figure 18A. [Figure 18D] Figure 18D is a right side view of the arrangement of the apparatus shown in Figure 18A. [Figure 18E] Figure 18E is a left side view of the arrangement of the apparatus shown in Figure 18A. [Figure 18F] Figure 18F is a top view of the arrangement of the apparatus shown in Figure 18A. [Figure 18G] Figure 18G is a bottom view of the arrangement of the apparatus shown in Figure 18A. [Modes for carrying out the invention]

[0016] The configurations disclosed herein relate to systems and methods for treating and / or monitoring wounds. Some arrangements of negative pressure wound therapy devices disclosed herein may include a negative pressure source configured to provide negative pressure to a wound covered with a wound dressing, via a fluid channel, and connected and / or fluidically coupled to the wound.

[0017] Throughout this specification, references to wounds will be made. The term wound is interpreted broadly and includes open and closed wounds in which the skin is torn, incised, or perforated, or in which trauma results in a contusion, or any other surface or other condition or imperfection on the patient's skin, or any other that would benefit from decompression therapy. Thus, a wound is broadly defined as any area of ​​tissue damage in which fluid is generated or not generated. Examples of such wounds include, but are not limited to, abdominal wounds or other large wounds or incisions, abdominal wounds with visceral opening, abdominal compartment syndrome, burns, partial-thickness burns resulting from any of the following: surgery, trauma, sternotomy, fasciotomy, or other conditions, dehiscence wounds, acute wounds, subacute wounds, chronic wounds, subacute and dehiscence wounds, traumatic wounds, skin flaps and grafts, lacerations, abrasions, contusions, bruises, diabetic ulcers, pressure ulcers, stomas, surgical wounds, trauma and venous ulcers.

[0018] The configurations of the systems and methods disclosed herein can be used in conjunction with local negative pressure ("TNP") or decompression therapy systems. Simply put, negative pressure wound therapy can assist in the closure and healing of many forms of "difficult-to-heal" wounds and reduce bacterial load (and therefore risk of infection) by reducing tissue edema, promoting blood flow and granular tissue formation, and removing excess exudate. Furthermore, this therapy can lead to less wound damage and faster healing. TNP therapy systems can also assist in the healing of surgically closed wounds by removing fluid. TNP therapy can help stabilize tissue at the opposite site of closure. Further beneficial uses of TNP therapy can be found in grafts and flaps where removing excess fluid is crucial and close proximity of the graft to the tissue is required to ensure tissue viability.

[0019] As used herein, a negative pressure level such as -X mmHg represents a pressure level relative to normal ambient atmospheric pressure, which may correspond to 760 mmHg (or 1 atm, 29.93 inHg, 101.325 kPa, 14.696 psi, etc.). Thus, a negative pressure value of -X mmHg reflects a pressure X mmHg lower than 760 mmHg, or in other words, a pressure of (760-X) mmHg. In addition, negative pressures "lower" or "smaller" than X mmHg correspond to pressures closer to atmospheric pressure (e.g., -40 mmHg is lower than -60 mmHg). Negative pressures "higher" or "larger" than -X mmHg correspond to pressures further away from atmospheric pressure (e.g., -80 mmHg is higher than -60 mmHg). In some cases, a local ambient atmospheric pressure is used as a reference point, and such a local atmospheric pressure does not necessarily have to be, for example, 760 mmHg.

[0020] The systems and methods disclosed herein may be used in addition to, or instead of, decompression therapies such as washing, removal of washing fluid, ultrasound, heating or cooling, nerve stimulation, or similar methods, or in some cases, for wound monitoring without the application of additional therapies. The systems and methods disclosed herein may be used in conjunction with dressings, including compression dressings, decompression dressings, or similar methods.

[0021] Healthcare professionals such as physicians, nurses, or similar personnel may provide TNP prescriptions that specify, for example, pressure levels or application times. However, the healing process varies from patient to patient, and prescriptions may affect the healing process in ways that the clinician or healthcare provider did not anticipate when devising the prescription. Healthcare providers may attempt to adjust prescriptions as wounds heal (or fail to heal), but such processes may require various appointments that are time-consuming and repetitive. The arrangements disclosed herein provide systems, devices, or methods for efficiently adjusting TNP prescriptions and delivering effective TNP therapy.

[0022] Wound healing system Any implementation of a negative pressure wound therapy apparatus or system disclosed herein may have a pump assembly (also referred herein as the apparatus or pump apparatus) having a core assembly. Several arrangements of the core assembly may include all or almost all of the electrical and mechanical components and features necessary for the user interface, negative pressure control, and battery operation. The core assembly may include a printed circuit board assembly (PCBA), which may be an electronic assembly that includes two system microcontrollers. The PCBA may include a main controller capable of controlling one or more of the operations of the user interface, communication interface, and alarm generation. The PCBA may include a motor controller (sometimes referred to as a pump controller) capable of controlling one or more of the pump operations or monitoring other signals such as temperature, pump voltage / current. Any implementation of a system disclosed herein may have two microcontrollers to provide some redundancy to the system. In this arrangement, if one controller fails, the other controller can respond to confirm that the system has safely failed. The two microcontrollers can share periodic communications to confirm whether the other is still functioning. In any configuration, the core assembly may include a display, which may be one or more of a color display or a touchscreen.

[0023] Any implementation of the core assembly may include a flow module (or flow manifold). In some configurations, the flow module may include a two-part housing that forms the internal pathway when assembled. The flow module can be configured to integrate the canister connection, pressure sensors, self-testing solenoid valve, and check valve with minimal external tubing. This reduces the possibility of internal tubing getting stuck or twisted. The flow module may have one, two, or more pressure sensors. The flow module may have two pressure sensors positioned on either side of the solenoid valve of the flow module. The pressure sensors can enable airflow measurement by measuring the pressure drop across the solenoid valve. A check valve can be used to stop any rear leakage due to motor valve wear.

[0024] In some configurations, plastic molded parts are used for core module or core assembly structures. Each module within a pump assembly may be supported by a separate plastic molded part, such that each module can be fully supported on a separate plastic molded part.

[0025] The negative pressure wound treatment system 100 may have a canister locking mechanism between the pump assembly 160 and the canister 162. In some configurations, the locking mechanism may have a spring mechanism that can selectively engage with or secure to the canister cap, which may be screwed to the canister or otherwise connected to the canister (e.g., welded, glued, etc.). The locking mechanism can be released and the canister removed using a canister release button. Some configurations of the canister locking / release mechanism may be configured to be operated with one hand to assist a user with only one hand or one strong hand in removing the canister from the pump assembly. For example, and not limited to, the canister locking mechanism is released so that the canister can be removed from the pump assembly by pressing the canister release button. The negative pressure wound treatment system 100 may be configured to release the locking of the canister locking mechanism, and in some configurations, to apply force to the canister in the pump assembly, thereby physically separating the canister from the pump assembly. In other configurations, the negative pressure wound treatment system 100 may be configured to allow the user to remove the canister from the pump assembly using only one hand (i.e., one-handed operation). Again, some configurations of the negative pressure wound treatment system 100 may be configured so that the canister can be separated from the pump assembly relatively easily by pressing a canister release button with one hand or one finger. In some configurations, the use of this locking mechanism is beneficial because, while it makes the pump unit slightly more complex, the locking mechanism allows for a simpler canister design (without a separate clip) and provides a good user experience. The lower core assembly or support can provide support for the battery, pump, and flow module. The upper core component can support the PCBA and display.

[0026] Figure 1A schematically illustrates a negative pressure wound treatment system 100 (also known as a decompression or negative pressure wound therapy system, TNP system, or wound treatment system). Although not required in any implementation example disclosed herein, the negative pressure wound treatment system 100 may include a wound filler 102 placed on or inside a wound 104 (which may be a cavity). The wound 104 may be sealed by a wound cover 106, which may be a drape, so that the wound cover 106 can be in fluid communication with the wound 104. The wound filler 102 in combination with the wound cover 106 may be referred to as a wound dressing. The wound cover 106 may be connected using a tube or conduit 108 (also referred to herein as a flexible suction adapter or fluid connector) to a wound therapy device 110 (which may be referred to as a “pump assembly” as a whole or in part) configured to supply decompression or negative pressure. The conduit 108 may be a single-lumen tube or a multi-lumen tube. The conduit or tube 142 can be detachably and selectively connected to the conduit 108 using the connector 112.

[0027] In any of the systems disclosed herein, the wound healing device may be canisterless, for example, and not limited to, but wound exudate being collected in a wound dressing or transferred via a conduit for collection elsewhere. However, any of the wound healing devices disclosed herein may include a canister or support a canister.

[0028] Furthermore, in any of the wound healing systems disclosed herein, any of the wound healing devices may be attached to a wound dressing, supported by a wound dressing, or adjacent to a wound dressing. The wound filler 102 may be any preferred type, such as a hydrophilic or hydrophobic foam, gauze, or inflatable bag. The wound filler 102 may be adaptable to the wound 104 such that the wound filler 102 substantially fills the cavity of the wound 104. The wound cover 106 may provide a substantially fluid-impermeable seal over the wound 104. The wound cover 106 may have a top side and a bottom side. The bottom side may be sealed to the wound 104 with adhesive (or by any other preferred method), for example, by sealing with the skin around the wound 104. The conduit 108 or any other conduit disclosed herein may be formed from polyurethane, PVC, nylon, polyethylene, silicone, or any other suitable material.

[0029] The wound cover 106 may have a port (not shown) configured to receive the end of the conduit 108. In some cases, the conduit 108 may pass through or under the wound cover 106 to supply decompression to the wound 104, in other ways, to maintain a desired level of decompression within the wound 104. The conduit 108 may be any suitable article configured to provide at least substantially sealed fluid channels or passages between the wound therapy device 110 and the wound cover 106 to supply decompression provided by the wound therapy device 110 to the wound 104.

[0030] The wound cover 106 and wound filler 102 may be provided as a single article or as a single integrated unit. In some cases, the wound filler may not be provided, and the wound cover itself may be considered the wound dressing. The wound dressing may then be connected to the negative pressure source of the wound therapy device 110 via a conduit 108. In some cases, although not required, the wound therapy device 110 may be miniaturized and portable, although a larger conventional negative pressure source (or pump) may also be used.

[0031] The wound cover 106 may be positioned over the wound site to be treated. The wound cover 106 may form a substantially sealed cavity or enveloping space over the wound. The wound cover 106 may have a film with high water vapor permeability to allow evaporation of excess fluid and may have a superabsorbent material contained inside to safely absorb wound exudate. In some cases, the components of the TNP system described herein may be particularly suitable for incised wounds that exude small amounts of wound exudate.

[0032] The wound therapy device 110 can be operated with or without the use of an exudate canister. In some cases, the wound therapy device 110 may include an exudate canister, as illustrated. In some cases, the process of changing wound dressings or pumps can be facilitated or improved, as needed, by configuring the wound therapy device 110 and the conduit 108 so that the conduit 108 can be quickly and easily removed from the wound therapy device 110. Any of the pump assemblies disclosed herein may have any suitable connection between the conduit 108 and the pump.

[0033] The wound healing device 110 can deliver negative pressure of approximately -80 mmHg, or approximately -20 mmHg to -200 mmHg. Note that these pressures are relative to normal ambient atmospheric pressure, meaning that -200 mmHg may practically be approximately 560 mmHg. In some cases, the pressure range may be between approximately -40 mmHg and -150 mmHg. Alternatively, pressure ranges of -75 mmHg or less, -80 mmHg or less, or above -80 mmHg can be used. In some cases, pressure ranges below -75 mmHg may also be used. Alternatively, pressure ranges of approximately -100 mmHg, or even above -150 mmHg, can be supplied by the wound healing device 110.

[0034] As will be described in more detail below, the negative pressure wound treatment system 100 may be configured to provide a connection 332 to a separate or remote computing device 334'. The connection 332' may be wired or wireless (such as Bluetooth, Bluetooth Low Energy (BLE), Near Field Communications (NFC), WiFi, or cellular). The remote computing device 334' may be a smartphone, tablet, laptop or another standalone computer, a server (such as a cloud server), another pumping device, etc.

[0035] Figure 1B illustrates another negative pressure wound treatment system 100. The negative pressure wound treatment system 100 may have, in combination with, any of the components, features, or other details of any of the other negative pressure wound treatment systems disclosed herein, including but not limited to, the negative pressure wound treatment system 100' shown in Figure 1A or the negative pressure wound treatment system 1400 shown in Figure 10, or in place thereof. The negative pressure wound treatment system 100 may have a wound cover 106 over the wound 104, capable of sealing the wound 104. The wound cover 106 may be connected to a wound treatment device 110 (sometimes referred to as a “pump assembly” as a whole or in part) configured to supply decompression or negative pressure using a conduit 108, such as a single-lumen or multi-lumen conduit. The wound cover 106 may be in fluid communication with the wound 104.

[0036] Referring to Figure 1B, the conduit 108 may have a bridge portion 130 which may have a proximal end and a distal end (the distal end being closer to the wound 104 than the proximal end), and an applicator 132 at the distal end of the bridge portion 130 which forms a flexible suction adapter (or conduit) 108. A connector 134 may be positioned at the proximal end of the bridge portion 130 so as to extend along the length of the bridge portion 130 of the conduit 108 shown in Figure 1B and connect to at least one of the channels. A cap 140 may be connected to a portion of the conduit 108 and, in some cases, may be attached to the connector 134 as illustrated. The cap 140 may be useful in preventing fluid from leaking out of the proximal end of the bridge portion 130. The conduit 108 may be a Soft Port manufactured by Smith & Nephew. As described above, the negative pressure wound treatment system 100 may include a negative pressure source, such as a device 110, which can supply negative pressure to the wound 104 through a conduit 108. Although not required, the canister or device 110 may also include other containers for storing wound exudate and other fluids that can be removed from the wound.

[0037] The device 110 may be connected to the connector 134 via a conduit or tube 142. When in use, the applicator 132 may be placed over an opening formed in a cover 106 placed over a suitably prepared wound or wound 104. The wound therapy device 110 can then be operated with the wound therapy device 110 connected to the connector 134 via the tube 142 to supply negative pressure to the wound. The application of negative pressure may continue until a desired level of healing of the wound is achieved.

[0038] The bridge portion 130 may include an upper channel material or layer positioned between the upper layer and the intermediate layer, with the lower channel material or layer positioned between the intermediate layer and the bottom layer. The upper layer, intermediate layer, and lower layer may have elongated portions extending between their proximal and distal ends and may contain fluid-impermeable materials, such as polymers including polyurethane. Naturally, it will be understood that the upper layer, intermediate layer, and lower layer may each be constructed from different materials, including semi-permeable materials. In some cases, one or more of the upper layer, intermediate layer, and lower layer may be at least partially transparent. In some examples, the upper layer and lower layer may be curved, rounded, or convex outward over most of their length.

[0039] The upper and lower channel layers may be elongated layers extending from the proximal to the distal end of the bridge 130, and each may preferably contain a porous material including, for example, an open-cell foam such as polyethylene or polyurethane. In some cases, one or more of the upper and lower channel layers may consist of, for example, a knitted or woven spacer fabric (such as a knitted polyester 3D fabric, Baltex 7970.RTM., or Gehring 879.RTM.), a nonwoven material, or a terry weave or loop pile material. The fibers are not necessarily woven and may include felt and flocking fiber materials (including materials such as Flotex.RTM.). The selected material is preferably positioned to guide wound exudate away from the wound, to transmit negative pressure or expelled air to the wound site, and to provide the channel layer with some torsional or occlusive resistance. In one embodiment, the upper channel layer may comprise an open-cell foam such as polyurethane, and the lower channel layer may comprise a fabric. In another embodiment, the upper channel layer is optional, and the system may instead comprise an open upper channel. The upper channel layer may have an upper surface that is curved, rounded, or convex upward and a substantially flat lower surface, and the lower channel layer may have a lower surface that is curved, rounded, or convex downward and a substantially flat upper surface.

[0040] The fabric or material of any component of the bridge 130 may have a three-dimensional (3D) structure, and one or more types of fibers may form a structure in which the fibers extend in all three-dimensional directions. Such fabric may, in some cases, assist in wicking, fluid transport, or negative pressure transmission. In some cases, the fabric or material of the channel may include several layers of material stacked on top of each other or layered, which may, in some cases, be useful in preventing the channel from collapsing under the application of negative pressure. The material used in some implementations of the conduit 108 may also be conformable and flexible, which may, in some cases, help in avoiding pressure ulcers and other complications that may arise from wound healing systems pressed against the patient's skin.

[0041] The distal ends of the upper, middle, and lower layers, as well as the channel layer, may be expanded at their distal ends (placed over the wound site) to form a "teardrop" or other expanded shape. At least the distal ends of the upper, middle, and lower layers, as well as the channel layer, may also have at least one through-opening. This opening may be useful not only for draining wound exudate and applying negative pressure to the wound, but also during the manufacture of the device, as these openings may be used to properly align each of these layers.

[0042] In some implementations, a controlled gas leak section 146 (sometimes referred to as a gas leak section, air leak section, or controlled air leak section) may be located above the bridge section 130, for example, at the proximal end of the bridge section 130. This air leak section 146 may include an opening or channel extending through the upper layer of the bridge section 130 so that the air leak section 146 is in fluid communication with the upper channel of the bridge section 130. When suction is applied to the conduit 108, gas (such as air) may enter through the gas leak section 146 and travel along the upper channel of the bridge section 130 from the proximal end to the distal end of the bridge section 130. The gas can then be drawn into the lower channel of the bridge section 130 by passing it through the opening through the distal ends of the upper layer, intermediate layer, and lower layer.

[0043] The air leak section 146 may include a filter. Preferably, the air leak section 146 is located at the proximal end of the bridge section 130 to minimize the possibility of wound exudate or other fluids coming into contact with the air leak section 146 or the filter and clogging or obstructing the air leak section 146 or the filter. In some examples, the filter may be a microporous membrane capable of eliminating microorganisms and bacteria and filtering out particles larger than 45 μm. Preferably, the filter may be capable of eliminating particles larger than 1.0 μm, more preferably larger than 0.2 μm. Advantageously, some implementations may provide a filter that is at least partially chemically resistant to, for example, water, common household liquids such as shampoo, and other surfactants. In some cases, reapplying vacuum to the suction adapter or wiping the exposed outer portion of the filter may be sufficient to clear away any foreign matter that could clog the filter. The filter may be composed of a suitably resistant polymer such as acrylic, polyethersulfone, or polytetrafluoroethylene, and may be oily or hydrophobic. In some cases, the gas leak section 146 may supply a relatively constant gas flow that does not increase noticeably when additional negative pressure is applied to the conduit 108. In examples of negative pressure wound healing systems 100 in which the gas flow through the gas leak section 146 increases when additional negative pressure is applied, preferably this increased gas flow is minimized and does not increase proportionally to the negative pressure applied thereto. Further descriptions of such bridges, conduits, air leak sections, and other components, features, and details that may be used in any implementation of the negative pressure wound healing systems disclosed herein are found in U.S. Patent No. 8,801,685, which is incorporated herein by reference in its entirety as if it were fully described herein.

[0044] Any of the wound therapy devices disclosed herein (such as device 110 or 110') may provide continuous or intermittent negative pressure therapy. Continuous therapy may be delivered above 0 mmHg, -25 mmHg, -40 mmHg, -50 mmHg, -60 mmHg, -70 mmHg, -80 mmHg, -90 mmHg, -100 mmHg, -120 mmHg, -125 mmHg, -140 mmHg, -160 mmHg, -180 mmHg, -200 mmHg, or below -200 mmHg. Intermittent therapy may be delivered between a low negative pressure set point and a high negative pressure set point (sometimes referred to as a set point). Low settings can be set above 0mmHg, -25mmHg, -40mmHg, -50mmHg, -60mmHg, -70mmHg, -80mmHg, -90mmHg, -100mmHg, -120mmHg, -140mmHg, -160mmHg, -180mmHg, or below -180mmHg. High settings can be set above -25mmHg, -40mmHg, -50mmHg, -60mmHg, -70mmHg, -80mmHg, -90mmHg, -100mmHg, -120mmHg, -125mmHg, -140mmHg, -160mmHg, -180mmHg, -200mmHg, or below -200mmHg. During intermittent treatment, negative pressure at a low setting can be delivered over a first time period, and at the end of the first time period, negative pressure at a higher setting can be delivered over a second time period. At the end of the second time period, negative pressure at a lower setting can be delivered. The first and second time periods can be the same or different.

[0045] During operation, the wound filler 102 may be inserted into the cavity of the wound 104, and the wound cover 106 may be positioned to seal the wound 104. The wound therapy device 110 can provide negative pressure to the wound cover 106, which can be transmitted to the wound 104 via the wound filler 102. Fluids (such as wound exudate) may be drawn out through the conduit 108 and stored in a canister. In some cases, the fluid is absorbed by the wound filler 102 or one or more absorbent layers (not shown).

[0046] Wound dressings that may be used with the pump assembly and system of this application include Renasys-F, Renasys-G, Renasys AB, and Pico dressings available from Smith & Nephew. Further descriptions of such wound dressings and other components of negative pressure wound therapy systems that may be used with the pump assembly and system of this application can be found in U.S. Patent Publications WO2012 / 0116334, 2011 / 0213287, 2011 / 0282309, 2012 / 0136325, and U.S. Patent No. 9,084,845, each of which is incorporated by reference in whole. In some cases, other suitable wound dressings may be used.

[0047] Figures 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, and 2I show the configuration of the negative pressure wound therapy device 110. In some configurations, as described, the negative pressure wound therapy device 110 may have a pump assembly 160 that has a modular design, in that many of the sub-components of the pump assembly 160 are grouped and designed to be located within modules. This modular arrangement of the various components of the pump assembly 160 makes it easier and quicker to remove and replace faulty components of the pump assembly 160.

[0048] As illustrated, the pump assembly 160 and the canister 162 may be connected to form the wound therapy device 110. The pump assembly 160 may include a user interface, a communication interface, negative pressure generation and control, and alarm generation. Some arrangements of the pump assembly 160 may include a housing whose primary function is to enclose or house the electronics and other components. The housing can provide patient safety, isolate from the inside of the device, protect the pump device from impact damage, and provide aesthetic appeal. The housing may also provide a transparent window so that the user can see the display. The main housing can be easily removed without interfering with the rest of the device and component connections (i.e., it can be removed without having to disconnect the electrical connectors), allowing for easier repairs.

[0049] The pump assembly 160 may also include a core assembly (such as core assembly 212), also called a core module. Some configurations of the core assembly may include all or almost all of the electrical and mechanical components and features necessary for the user interface, negative pressure control, and battery operation. In some configurations, the core assembly may be a central subassembly of the pump assembly and may be configured to be easily extractable from the pump assembly to facilitate and expedite service and repair.

[0050] The core assembly can be easily separated into separate components to facilitate service, cleaning, and assembly. The pump assembly 160 may also include a rear trim panel that can provide a USB interface, a charger port, and a speaker. The rear trim panel can be easily removed to allow for quick repair of the charger connector, which may break due to misuse of the device (for example, by removing two screws and associated screw cover plate). The pump assembly 160 may also include a handle or carrying strap, which would facilitate the portability of the device.

[0051] Referring to Figure 2C, the pump assembly 160 may include, but is not limited to, an interface panel 170 having a display 172, one or more indicators 174, or one or more controls or buttons, including, but not limited to, a therapy start and pause button 180 or an alarm / warning mute button 182. Some arrangements of the display lens may be made from polycarbonate with a hard coat layer or from polymethyl methacrylate. The interface panel 170 may have one or more input controls or buttons 184 (three shown) that can be used to control any function of the pump assembly 160 or the interface panel 170. For example, and not limited to, one or more of the buttons 184 may be used to turn the pump assembly 160 on or off, start or pause therapy, operate and monitor the operation of the pump assembly 160, scroll through a menu displayed on the display 172, or control or perform other functions. In some cases, the command buttons 184 may be programmable and may be made from tactile, soft rubber.

[0052] In some configurations, the interface panel 170 may generally be planar, or it may be slightly angled toward the front surface of the pump assembly 160 with respect to the horizontal plane. For example, and not limited to, some configurations of the interface panel 170 may be angled forward with respect to the horizontal plane at 20° (or approximately 20°), or 15° (or approximately 10°, or less than 10°) to 30° (or approximately 30°, or greater than 30°), or any angle within the aforementioned range.

[0053] Furthermore, the interface panel 170 may have a visual indicator 186 that can show which of one or more buttons 184 is active. The interface panel 170 may also have a lock / unlock control or button 188 that can be configured to selectively lock or unlock the functions of various buttons (e.g., button 184) or displays 172. In some configurations, when the lock / unlock button 188 is locked, the pump assembly 160 will not change any display or performance function of the device by pressing one or more of the other buttons or displays. In this way, the interface panel 170 will be protected from accidental bumping or touching of the various buttons or displays. In some configurations, the interface panel 170 may be configured so that one or more buttons on the interface panel 170 can be used while the device and / or the interface panel 170 are locked, but adjustments to the device's therapeutic settings are locked or prevented when locked. The interface panel 170 may be located on the upper portion of the pump assembly 160, for example, and not limited to, on the upward surface of the pump assembly 160.

[0054] A display 172, which may be an LCD screen or similar, may be mounted in the middle of the interface panel 170. The display 172 may be a touchscreen display. The display 172 may support playback of audiovisual (AV) content, such as instructional videos, and may render several screens or graphical user interfaces (GUIs) for configuring, controlling, and monitoring the operation of the pump assembly 160.

[0055] One or more indicators 174 may be illuminations (such as LEDs) and may be configured to provide a visual indication of alarm conditions and / or pump status. For example, and but not limited to, one or more indicators 174 may be configured to provide a visual indication of the status of the pump assembly 160, or other components of the negative pressure wound treatment system 100, including but not limited to the conduit 108 or wound cover 106 (such as providing indications of normal operation, low battery, leak, canister full, shut-off, overpressure, etc.). For example, and but not limited to, one or more indicators 174 may indicate to a user (e.g., a patient, healthcare provider, etc.) various operating conditions or failure conditions of the pump assembly 160, including warning the user of normal or appropriate operating conditions, pump failure, failure of power or supply to the pump, detection of a leak in the wound cover or flow path (sometimes called a fluid flow path), blockage of suction in the flow path, canister full, overpressure, and / or other similar or appropriate conditions, or combinations thereof. For example, and not limited to, one or more indicators 174 can indicate to a user (e.g., a patient, healthcare provider, etc.) that the system is OK, the battery level is charged, or the battery is actively charging, and / or a warning or alarm is in effect. Any one or more suitable indicators, such as visual, auditory, or tactile indicators, may be used further or alternatively.

[0056] Figure 2C shows a rear or rear view of the wound therapy device 110 shown in Figure 2A. As shown, the pump assembly 160 may include a speaker 192 for generating sound. For example, and but not limited to, the speaker 192 may generate an audible alarm in response to a bias in therapy delivery, non-compliance with therapy delivery, or any other similar or preferred medical condition, or a combination thereof. The speaker 192 may provide sound accompanying one or more instructional videos that may be displayed on the display 172.

[0057] The pump assembly 160 may be configured to provide easy access (such as an access door on the casing of the pump assembly) to one or more filters of the pump assembly 160, such as an antimicrobial filter. This allows users (such as healthcare workers or patients) to more easily access, inspect, or replace such filters. The pump assembly 160 may also include a power jack assembly 196 (which may include a power cord) for supplying power to the pump assembly 160 or for charging and recharging an internal power source (such as a battery). Some implementations of the pump assembly 160 may include a disposable or reusable power source, such as one or more batteries, and as a result, a power jack is not required. The pump assembly 160 may have a recess 198 formed inside to facilitate gripping of the pump assembly 160.

[0058] The canister 162 can hold the fluid drawn from the wound 104. For example, the canister 162 may have a canister body 346 having a capacity of 800 mL (or approximately 800 mL), or a capacity of 300 mL or less to 1000 mL or more, or any capacity level within this range. The canister 162 may include a tube for connecting the canister body 346 to the conduit 108 to form a fluid flow path. The canister 162 can be replaced with another canister when it is filled with fluid or when the user has finished treatment.

[0059] In some configurations, the canister 162 may include a low-cost, disposable assembly for storing exudate extracted from the wound. The canister 162 may be non-sterile and may be designed for single use, which can be placed after exudate collection from a single user. The canister 162 collects wound exudate and may be available with or without a solidifying agent. The solidifying agent can solidify the exudate collected in the canister. The canister 162 may be secured under the pump assembly 160 using the locking mechanism described.

[0060] Referring to Figure 2F, the wound healing device 110 may include a canister inlet tube 142 that is in fluid communication with the canister body 346 of the canister 162. The canister inlet tube 142 may be connected to a covering port connector 144 that can be used to connect to the conduit 108.

[0061] The canister 162 may be selectively connectable to and detachable from the pump assembly 160. Referring to Figure 2H, in some cases, the canister 162 can be selectively released from the pump assembly 160 by pressing a canister release button 202. Referring to Figure 2C, the canister 162 may have one or more fill lines or markings 204 to indicate to the user and the amount of fluid or seepage stored in the canister 162.

[0062] The wound healing device 110 may have a handle 208 that can be used to lift or carry the wound healing device 110. The handle 208 can be connected to a pump assembly 160 and may be rotatable relative to the wound healing device 110 so that it can be rotated upward to lift or carry the wound healing device 110 or the pump assembly 160, or rotated to a lower contour in a more compact position when the handle is not in use. In some cases, the handle 208 may be connected to the pump assembly 160 in a fixed position. The handle 208 may be connected to the upper part of the pump assembly 160 or may be detachable from the wound healing device 110.

[0063] Figure 3A is an exploded view of the pump assembly 160. Several arrangements of the pump assembly 160 are designed to facilitate the removal of components and subcomponents of the pump assembly 160 from the pump assembly 160 for cleaning, servicing, replacement, or otherwise. As described, several arrangements of the pump assembly 160 are designed so that various components and subassemblies are arranged and assembled modularly within the pump assembly 160 to facilitate the removal, cleaning, and / or servicing of the various components and subassemblies. In some arrangements, the pump assembly 160 may have a housing 210 sized and configured to enclose at least the core assembly 212. The housing 210 can be made from acrylonitrile butadiene styrene or any other desired or suitable material.

[0064] The collection canister 162 can be sealed to the bottom of the pump assembly 160 using a core base seal 214. The core assembly 212 can be connected to the housing 210 using a number of screws or other fasteners 215. The rear trim assembly 216 can be connected to the housing 210 using one or more fasteners 217 which may have one or more screws or fastener covers 219. Some arrangements of the rear trim assembly 216 may have a USB port 199 or other wired connection port connected to a printed circuit board 201 which may be included in the rear trim assembly 216. The rear trim assembly 216 may include a speaker 192 and may have other components or connectors, buttons, switches, or inputs. A USB cover 221 may be detachably connected to the USB port.

[0065] In some configurations, the power cord 196 may be part of a power jack assembly and / or connect directly to a rear trim assembly 216. The power cord 196, or other components of the power jack assembly, or other components that electrically communicate with the power cord 196, may extend through the rear trim assembly 216 and be electrically connected to the electrical components of the rear trim assembly 216 and / or other components of the pump assembly 160. In some configurations, a power jack assembly that may include the power cord 196 may be connected to the rear trim assembly 216. The power jack assembly and the pump assembly 160 may, in some configurations, be configured to facilitate removal and replacement of the power cord 196 compared to models in which the power cord connects directly to internal electronic components within the pump, which may require a service technician to disassemble the pump to replace the power cord, possibly remove it, and make new soldered connections, etc. In some configurations of the pump assembly 160, a service technician may remove the power jack assembly from the rear trim assembly 216, install a new power jack assembly, and replace the power cord 196, or in some configurations, simply remove and replace the rear trim assembly 216 so that the power jack assembly and / or power cord 196 can be installed and the power cord 196 can be replaced.

[0066] The handle 208 may be connected to a post 209 of the housing 210, which is configured to pivot relative to the housing 210. In some configurations, the handle may be made from a thermoplastic elastomer or any other suitable or desired material. In some configurations, the handle may be configured to simply clip or snap onto the housing 210. In some configurations, the handle 208 may be configured to rotate relative to the housing 210, or it may be rigidly (non-rotatably) attached to the housing 210. In some configurations, two or more handle caps 211 may be used to connect the handle 208 to the post 209 of the housing 210, or to cover a recess or recess 213 of the handle 208. The canister release button 202 may extend through an opening 203 in the housing 210.

[0067] Referring to Figure 3C, the core assembly 212 may include an upper core assembly 226 that can be connected to the core assembly 212 using one or more fasteners 227, which may be screws. The upper core assembly 226 may include a display assembly 228 that may have a 2.8-inch TFT display, a 3-inch display, or any other suitable display. The upper core assembly 226 may include a foam spacer 229 between the display assembly 228 and a printed circuit board 230, which may include a processor, memory devices, and other electronic components for operating the display assembly 228 and the pump assembly 160. The display assembly 228, the printed circuit board 230, and other components of the core assembly 212 can be electronically connected using one or more cable connectors. Furthermore, one or more buttons and / or indicators 174, 180, 182, 184, 194, and / or other buttons or indicators may be electronically and / or physically connected to the printed circuit board 230. The display assembly 228, the foam spacer 229, and the printed circuit board 230 may be supported by a support base 232 (also referred to herein as the upper support), which can be connected to the other components of the core assembly 212 using fasteners 227, so that the components of the upper core assembly 226 and the components related to the display of the pump assembly 160 can be removed from the other components of the core assembly 212 by removing the cable connectors associated with the components of the upper core assembly 226.

[0068] Referring to Figure 3D, the core assembly 212 may include a flow module 236 (or flow manifold) which may be configured to receive air / fluid drawn through the collection canister 162. For example, and not limited to, the flow module 236 may have an opening 235 in the lower support 264 of the lower core assembly 254 and / or an opening 233 or port which can be aligned with the connector interface 372 of the collection canister 162, so that air / fluid drawn through an opening 373 extending through the connector interface 372 may be drawn through the opening 233 of the flow module 236 by the pump module 248. In this arrangement, the pump module 248 may draw air / fluid through the flow module 236 (located upstream of the pump module 248) via a pipe or conduit 241 which communicates with the pipe connector 247 of the pump module 248 (e.g., a first pipe connector 247a). In any configuration disclosed herein, the tube may have an inner diameter of 1 / 8 inch.

[0069] In some configurations, the flow module 236 may be connected to other components of the core assembly 212 using one or more fasteners 237 (three are shown). The flow module 236 may be electronically connected to other components of the core assembly 212 using a flow module wire strip 238. Two or more flow tubes, or three or more flow tubes, may be used to provide a fluid flow path from the pump module 248 to the canister or other components, as described above and below. Some configurations of the flow module 236 may include a pressure sensor, or a plurality of pressure sensors. In some configurations, a flow check valve 242 may be used to prevent the flow of air from the pump to the canister. In some configurations, the check valve 242 may have a barbed connector for connection to the tube and may be made from any suitable material or material, including but not limited to acrylic and silicone.

[0070] The check valve 242 may be connected to a pipe or conduit 240 (e.g., a first conduit 240a) which is connected to a pipe connector 247 (e.g., a second pipe connector 247b) of the pump module 248. The second conduit 240b may be connected to a downstream connector or side of the check valve 242 to transmit the air / fluid passing through the check valve 242 to the exhaust chamber 250 (also referred to herein as the noise reduction chamber or first noise reduction chamber), as will be described in more detail below. For example, and not limited to, the second conduit 240b may be connected to an inlet or opening 255 of the exhaust chamber 250 to transmit the air / fluid that has advanced through the check valve 242 to the exhaust chamber 250, as will be described in more detail below. One or more pipes 240 may be held in place in the core assembly 212 using pipe clips 244.

[0071] Referring to Figure 3E, the core assembly 212 may include a battery module 246 and a pump module 248. A cover 249 may cover one or more sides of the pump module 248. For example, and not limited to, the cover 249 may cover the top, rear, and sides of the pump module 248. The pump module 248 includes a pump motor. The pump module 248 may include pipe connectors 247 (which may include inlet and outlet pipe connectors) to which pipes can be connected.

[0072] The pump may be a diaphragm pump, or any other desirable or suitable type of pump, including rotary pumps, peristaltic pumps, piezoelectric pumps, or others. Some configurations of diaphragm pumps are well-suited to the required flow rate and pressure, have a long maintenance-free service life, and are relatively efficient and quiet.

[0073] In any configuration disclosed herein, the pump module 248 may be oil-free, characterized by low power consumption and low noise level, and may have a compact and lightweight design. The pump module 248 may have a 12V or 24V motor, may have a maximum flow rate rating of 4 liters / min, approximately 4 liters / min, 3 liters / min, or approximately 3 liters / min, and may have a maximum intermittent pressure of 1.9 bar. Some configurations of the pump module 248 may include a pump controller. In some configurations, the pump module 248 may be a diaphragm pump and a compressor-type pump.

[0074] The battery module 246 may be any suitable battery pack, which may include single-use and rechargeable batteries such as lithium-ion batteries. Some battery arrangements may include lithium-ion 18650 cells, or any other type of battery which does not require any of these features or characteristics but has sufficient or abundant power, good power density for its size, and / or is lightweight. The battery module may include a carefully designed charging circuit with full redundancy due to the inherent risks of lithium-ion battery technology and may be configured to operate over a limited temperature range. The battery module 246 and / or the pump module 248 may be coupled to or supported by the lower core assembly 254. The pump module 248 may be coupled to other components of the core assembly 212 using one or more fasteners 249 and / or cable strips.

[0075] Referring to Figure 3F, the core assembly 212 may include an exhaust chamber 250 configured to reduce the noise level or noise generated by the pump module 248. In some configurations, the cover plate 251 may be secured to the exhaust chamber 250 using one or more fasteners 252 (two shown). A foam element 253 may be positioned within the exhaust chamber 250. The foam element 253 may be sized to fit snugly or tightly within the exhaust chamber 250 and may be configured to attenuate the noise level of the pump module 248 and / or the exhaust air from the pump module 248. For example, and not limited to, in some configurations, the foam element 253 may have a size and shape similar to or identical to the size and shape of the space within the exhaust chamber 250, and in some configurations, the foam element 253 may have a shape similar to or identical to the shape of the space within the exhaust chamber 250 and be larger in size (e.g., 10% larger in volume or dimensions, or 5% to 20% larger in volume or dimensions) compared to the exhaust chamber 250. Referring to Figures 3F and 3J, the exhaust chamber 250 may have an inlet 255 and an outlet 257. The inlet may include a nipple or port for receiving a pipe or conduit component. The outlet 257 can essentially allow exhaust gases from the pump module 248 to exit the pump assembly 110.

[0076] Some configurations of the pump assembly may have a noise reduction element in the exhaust flow, either in addition to or without the exhaust chamber 250. In some configurations, the noise reduction element may be, or may include, an air pulse reduction chamber 460 (also referred to herein as a noise reduction chamber) downstream of the pump module 248, as shown in Figures 3G, 3H, 3I, 3J, and 3K. Referring to Figures 3G, 3H, 3I, 3J, and 3K, the noise reduction chamber 460 may be connected to a pipe connector 247 (e.g., a second pipe connector 247b) of the pump module 248 with a pipe or conduit 462 so that the air / fluid discharged from the pump module 248 passes through the noise reduction chamber 460 before leaving the pump assembly 160. The conduit 462 may be connected to an intake or port 464 of the air pulse reduction chamber 460. A second pipe or conduit 466 may be connected to the outlet opening or port 468 of the air pulse reduction chamber 460 so that air / fluid enters the intake 464 of the air pulse reduction chamber 460 and exits the air pulse reduction chamber 460 through the outlet opening 468 of the air pulse reduction chamber 460. In some configurations, the air / fluid exiting the air pulse reduction chamber 460 may then be transmitted through a check valve 470 and through pipe 466. In some configurations, the check valve 470 may be identical or similar to the check valve 242, and vice versa. A pipe or conduit 472 may be connected to pipe or conduit 476 using a connector 474 (barbed) to allow air / fluid to be transmitted from the check valve 470 to the exhaust chamber 250.

[0077] Referring to Figures 3H and 3K, the air pulse reduction chamber 460 may have a body 480 having ports 464, 468, a cover or plate 482 connected to the open surface of the body 480, and a foam layer 484. The foam layer 484 is optional, with some arrangements not having a foam layer 484. The cover 482 may be sealed and connected to the body 480 of the air pulse reduction chamber 460. In some arrangements, the body 480 may be formed such that a separate cover 482 is not required (e.g., the body 480 and cover 482 are formed integrally, such as by blow molding, 3D printing, or other suitable manufacturing method). The foam layer 484 may be configured to reduce noise and / or stress on the air pulse reduction chamber 460 by attenuating sound pulses and / or vibrations within the air pulse reduction chamber 460 from the air (or more broadly, gas) moving through the air pulse reduction chamber 460. The main body 480 may have a space 481 within the main body through which air / fluid entering the inlet opening 464 must pass before exiting the outlet opening 468.

[0078] Referring to Figure 3K, several arrangements of the body 480 of the air pulse reduction chamber 460 may have a first inner wall segment 490 that can be positioned adjacent to the inlet opening 464. The first inner wall segment 490 may have a height equal to or similar to the height of the outer periphery wall 483 of the body 480. Since the first inner wall segment 490 may extend across a portion (e.g., most) of the distance across the space 481, air / fluid entering the inlet opening 464 must pass through an opening / passage 492 between the end of the first inner wall segment 490 and the outer periphery wall 483 before passing through the outlet opening 468. Thus, the first inner wall segment 490 acts like a flow deflector or diverter, or a fin on a baffle, attenuating the magnitude of pulses of air flowing through the air pulse reduction chamber 460 from the pump module 248 (which may have a diaphragm pump). Some configurations of the body 480 of the air pulse reduction chamber 460 may have a recess 494 that adds additional volume to the body 480 of the air pulse reduction chamber 460, further reducing the magnitude of the air pulses flowing through the air pulse reduction chamber 460. Attenuating the magnitude of the air pulses flowing through the air pulse reduction chamber 460 reduces the magnitude of the air pulses applied to the check valve 470 downstream of the air pulse reduction chamber 460, thereby allowing the check valve 470 to settle during the operation of the pump assembly 160. Some configurations of the body 480 may have a second inner wall segment (not shown), or three or more inner wall segments, that are sized and positioned to block or deflect the air passage through the air pulse reduction chamber 460.

[0079] In some configurations, the pump module 248 may be configured to discharge the drawn air through the collection canister 162 via an exhaust port (such as an exhaust outlet or port 257) or through one or more exhaust ports. In some configurations, such as the illustrated configuration, the pump module 248 may be configured to discharge the air drawn through the collection canister 162 via one or more spaces, gaps, cracks, or other openings formed within the housing 210, such that the pump assembly 160 does not have a separate exhaust port on the outside of the housing 210. This can be achieved in some configurations because the canister 162 may have an odor filter integrated therein so that any substances or vapors that may be in the discharged air are filtered and removed, or substantially removed, by an odor filter within the canister before the discharged air reaches the intake of the pump assembly 160.

[0080] Further details relating to exhaust ports or exhausts of pump assemblies that can be used with any configuration of the negative pressure wound treatment system 100 disclosed herein are described in International Application WO2019 / 211732, published on 7 November 2019, which is incorporated herein by reference as if it were fully described herein.

[0081] Figures 4A, 4B, 4C, 4D, 4E, 4F, 4G, and 4H show the arrangement of the lower core assembly 254. The lower core assembly 254 may have a base support 260, a second support 264 (also referred to herein as the lower support), and a canister release mechanism. In some arrangements, the canister release mechanism may include an actuator 262, a first locking arm 266, and a second locking arm 268. In some arrangements, the button 202 may be coupled to or integrally formed with the actuator 262. In addition to supporting the pump module and battery, the lower core assembly 254 may be configured to support a selectively movable locking mechanism that allows the canister 162 to be selectively coupled to the pump assembly 160.

[0082] One or more fasteners 270 (four shown) can be used to connect the second support 264 to the base support 216. The actuator 262 may be positioned between the base support 260 and the second support 264 and is slidable relative to the base support 260 and the second support 264 between the first and second positions. In some arrangements, the actuator 262 can move along a first axis A1 between the first and second positions. The first axis A1 may be substantially parallel to the axial centerlines of the button 202 and / or spring 272. In the first position, the actuator 262 may be locked or engaged with the upper portion of the canister 162, such as the neck flange or neck portion 274 (shown in Figure 3B), so that the canister 162 engages securely with the lower core assembly 254 of the pump assembly 160 when the actuator 262 is in the first position. The first position of actuator 262 is shown, for example, and not limited to, Figures 4A, 4D, 4E, and 4F. In the second position, actuator 262 can be retracted into or disengaged from the neck flange or neck portion 274 of canister 162 so that canister 162 can be freely removed from the lower core assembly 254, i.e., the pump assembly 160. The second position of actuator 262 is shown, for example, and not limited to, Figure 4G.

[0083] The actuator 262 can move from a first position to a second position so as to press the canister release button 202 or move the canister release button 202 toward the second support 264. A spring or other elastic member 272 is positioned between a portion of the actuator 262 (for example, but not limited to, adjacent to the canister release button 202) and the second support 264 to bias the actuator 262 to the first position. In this configuration, when the canister release button 202 is released, if the actuator 262 is in the second position, the spring 272 automatically moves the actuator 262 from the second position to the first position.

[0084] Some arrangements of the actuator 262 may have a base 263 and an opening 280 that extends through the base 263 and is substantially perpendicular to the base 263, and is large enough to receive the neck portion 274 of the canister 162 (for example, and not limited to, when the actuator 262 is in a second position). The actuator 262 may also have a projection or latch 282 that can extend into the opening 280 so that the latch 282 engages with the neck portion 274 when the actuator 262 is in a first position. The actuator 262 may be arranged to move between a first position and a second position as the latch 282 moves between a first position and a second position. The button 202 may extend away from the tab portion or flange 284 of the actuator 262 in a direction parallel to the first axis A1. The button 202 may extend or project in a direction substantially perpendicular to the axial centerline A2 of the opening 280 of the actuator 262. Referring to Figure 4C, the canister release button 202 may extend away from the opening 280 through an opening 281 formed within the tab portion of the flange 283, which protrudes away from the base 298 of the base support 260. Furthermore, the actuator 262 may be configured to move between a first position and a second position in a direction substantially perpendicular to the axial centerline A2 of the opening 280.

[0085] The actuator 262 may have a first set of slots 290, generally arranged in a direction substantially parallel to the first axis A1. The actuator 262 may have a second set of slots 292, arranged at an angle with respect to the direction of the first axis A1, for example, approximately 45°, or 40° to 50°, or 30° to 60° with respect to the first axis AI. The slots 290 may be configured to receive first and second projections 296, 297 extending from the base 298 of the base support 260. The length of the slots 290 may be long enough to allow movement of the actuator 262 between the first and second positions before the projections 296, 297 obstruct the movement of the actuator 262.

[0086] The first locking arm 266 may have an opening 269 extending through the body portion 271 of the first locking arm 266, which may be configured to receive a first projection 296 extending from the base support 260. The opening 269 may extend through the first locking arm 266 in a direction substantially parallel to the axial centerline A2 of an opening 280 extending through the actuator 262. The first locking arm 266 may be configured to rotate around the first projection 296. For example, with a first projection 296 extending through the opening 269 of the first locking arm 266, the opening 269 may rotate around the first projection 296 as the first locking arm 266 rotates around the first projection 296.

[0087] Similarly, the second locking arm 268 may have an opening 273 extending through the body portion 275 of the second locking arm 268, which may be configured to receive a second of the projections 296 extending from the base support 260. The opening 273 may extend through the second locking arm 268 in a direction substantially parallel to the axial centerline A2 of the opening 280 extending through the actuator 262. The second locking arm 268 may be configured to rotate around the second projection 297. For example, with a second projection 297 extending through the opening 273 of the second locking arm 268, the opening 273 may rotate around the second projection 297 as the second locking arm 268 rotates around the second projection 297.

[0088] A second set of slots 292 may be configured to receive projections 300, 302 extending from the main body portions 271, 275 of the first locking arm 266 and the second locking arm 268, respectively. The length of slots 292 may be sufficient to allow movement of the projections 300, 302 of the first and second locking arms 266, 268 so that the first and second locking arms 266, 268 rotate around the first and second projections 296, 297. Slots 292 can also limit the range of motion of the first and second locking arms 266, 268 as they rotate around the first and second projections 296, 297. A second set of slots 292 may be angled and configured such that, as actuator 262 moves from a first position to a second position, force is applied to the projections 300 of the first and second locking arms 266, 268, causing the first locking arm 266 and the second locking arm 268 to rotate radially outward from their first and second positions.

[0089] The first and second locking arms 266, 268 may be configured to move or rotate between a first position and a second position. In the first position, the projection or latch 304 of the first locking arm 266 and the projection or latch 306 of the second locking arm 268 can overlap and engage with the flange or neck portion 274 of the canister 162 or cap assembly 360 (as shown in Figures 4D and 4E). That is, they can overlap with the radially extending surface 375 of the flange or neck portion 274 of the canister of the cap assembly 360. In the second position, the projection or latch 304 of the first locking arm 266 and the projection or latch 306 of the second locking arm 268 are disengaged from the flange or neck portion 274 of the canister 162, as shown in Figures 4D and 4G.

[0090] Some arrangements of the base support 260 may have a slot 320 formed within the base portion 298 of the base support 260. The slot 320 may be configured to receive a second projection 322 extending away from the second surface of the first and second locking arms 266, 268. The projection 322 extending away from the second surface of the first and second locking arms 266, 268 may extend in a direction opposite to the direction in which the projection 300 extends from the first and second locking arms 266, 268. The slot 320 may be configured to allow the projection 322 of the first and second locking arms 266, 268 to translate along the slot 320 as the first and second locking arms 266, 268 move between first and second positions. Furthermore, the base support 260 may have an opening 321 formed through the base 298 of the base support 260, the opening 321 generally extending in a direction parallel to the axial centerline A2 of the opening 280 of the actuator 262. The opening 321 may be large enough to receive the flange or neck portion 274 of the canister 162.

[0091] In some cases, the spring 272 may be axially positioned with respect to a support surface 330 formed on a portion of the second support 264. The central projection 332 may also extend away from the support surface 330 to restrict the movement of the end of the spring member 272 relative to the surface of the support surface 330. The recess 334 may be formed within a flange portion 336 formed around the support surface 330. The recess 334 may be configured to receive the tab portion or flange 284 of the actuator 262 as the actuator 262 moves from a first position to a second position.

[0092] Several arrangements of the canister 162 may have a canister body 346 having one or more inclined projections 348 formed on the upper surface 349 of the canister body 346. The actuator 262 may have a first projection or tab 350 and a second projection or tab 352 that can extend through openings 354, 356, respectively, formed through the base 298 of the base support 260. The first and second tabs 350, 352 may extend in a direction substantially parallel to the axial centerline A2 that extends through an opening 280 formed within the actuator 262. The projections can move from the first position to the second position when the actuator 262 moves from the first position to the second position. The first and second projections 350, 352 can interact with the angled or inclined surfaces of one or more inclined projections 348 formed on the upper surface 349 of the canister 162. In some configurations, as the first and second projections 350, 352 move along the angled surface of the inclined projection 348, the first and second projections 350, 352 exert force on the inclined projection 348, causing the canister 162 to move away from the base support 260 of the lower core assembly 254 as the actuator 262 moves from the first position to the second position. This facilitates the removal of the canister 162 from the pump assembly 160.

[0093] In other configurations, the projection 348 formed on the upper surface 349 of the canister 162 can be used to facilitate one-handed removal of the canister 162 from the pump assembly 160, but can be prevented from pushing the canister 162 away from the pump assembly 160, as described with respect to the other configurations above. The projection 348 formed on the upper surface 349 of the canister 162 engages with the first and second projections 350, 352 to hold the first and second projections 350, 352 in the open position, thereby allowing the canister 162 to be removed from the pump assembly 160 without requiring the user to hold the first and second projections 350, 352 in the open position. For example, as described above, when the canister release button 202 is pressed, the first and second projections 350, 352 of the actuator 262 move across the inclined surface of projection 348 formed on the upper surface 349 of the canister 162 until the first and second projections 350, 352 move past projection 348. In this position, the orthogonal plane of projection 348 on the canister 162 prevents the first and second projections 350, 352, and therefore the actuator 262, from returning to their initial or locked positions, and as a result, the user can remove the canister 162 from the pump body 160 without continuing to press the canister release button 202. In this arrangement, the user can remove the canister 162 from the pump assembly 160 with one hand (i.e., with one hand).

[0094] The canister 162 may be configured to include, as part of the canister or a removable canister component, the use of the canister (including, for example, a sealing ring or gasket for sealing the canister, and an odor filter) and all typically associated disposable or reusable items, such that the sealing ring and odor filter are removed with the canister when the canister 162 is removed from the pump assembly 160. This may improve the efficiency and ease of mounting a new canister onto the pump assembly 160, thereby streamlining “patient-to-patient” service. In some configurations, “patient-to-patient” service may include, or in some configurations, only the following steps: removal of the used or partially filled canister 162, cleaning at least the external surface of the pump assembly 160 with a disinfectant cleaner, installing the new canister 162, and performing a self-test of the pump assembly 160 via the user interface of the pump assembly 160. To reiterate, this significantly simplifies service procedures and makes capital purchase and rental supply modes easier for several deployments of the negative pressure wound healing system 100.

[0095] In some configurations, the canister 162 may include a canister body 346. In some configurations, the canister body 346 may include a blow-molded one-piece design made from a transparent polymer that allows the exudate to be seen, or a translucent polymer that allows the level of the exudate to be determined. The canister body 346 can be made from a naturally translucent material such as polypropylene or high-density polyethylene, which is low-cost and non-toxic.

[0096] Some arrangements of the canister 162 may have a cap assembly 360 which can be configured to be removably connected (for example, and but not limited to, screw-connected) to an opening in the canister body 346. Figures 5A, 5B, 5C, 5D, and 5E show arrangements of the cap assembly 360 which may be included in any of the canisters 162 disclosed herein. Referring to Figures 5A, 5B, 5C, 5D, and 5E, some arrangements of the cap assembly 360 may include a cover 362 having a flange 274 (which may be an annular flange) and an opening 363 which axially penetrates the central portion of the first cap member 362.

[0097] The cap assembly 360 may also have a cap body 370 having a connector interface 372 projecting axially from a first main surface 371 of the cap body 370. The connector interface 372 may have a substantially cylindrical shape and an opening 373 extending axially through it. The opening 373 may be configured to provide a fluid passage for air and / or other gases in the canister body 346 to pass through and out of the canister body 346. The connector interface 372 may also have an annular groove 374 configured to receive and support a sealing ring 376 therein. The sealing ring 376 may be a rubber O-ring, or an O-ring from silicone or another suitable material.

[0098] The cap assembly 360 may also have a hydrophobic filter 386 and an odor filter 390. The odor filter 390 may also be configured to filter bacteria from the air flowing through the filter 390. The hydrophobic filter 386 may be used to prevent any liquid from leaking out of the canister body 346 through the opening 373 of the cap body 370 and may be positioned on one or both sides of the odor filter 390. The odor filter 390 may include any suitable filter membrane or material containing carbon. For example, and but not limited to, some arrangements of the odor filter 390 may include compressed carbon.

[0099] Conventional negative pressure wound therapy pumps often receive complaints about unpleasant odors. Since odor filters are typically located above the exhaust of the device, odors tend to accumulate in the internal tubing and pump motor over time. The arrangement of this disclosure provides a filter (e.g., filter 390) in the canister 162, preventing any bacteria or other odor-causing substances from passing through the cap assembly 360 into the pump assembly 160, thereby preventing or at least inhibiting any bacteria or other odor-causing substances from leaving the canister 162. This arrangement also has the benefit of preventing bacterial accumulation and contamination of the pump assembly 160 by other odor-causing substances, thereby enabling the reuse of the pump assembly 360 without requiring substantial cleaning of the air passages through the pump assembly 360.

[0100] In some configurations, the filter 390 may include a carbon-activated foam material. In some configurations, the filter 390 may include a compressed carbon element as part of a filtration system within the canister. The carbon element may have various shapes and sizes depending on the canister. The carbon element is the primary part of the filtration system, followed by a hydrophobic membrane. This ensures, in some configurations, that odors are filtered first as air is drawn from the canister to the pump. As shown, this filtration system can be fitted into or formed as part of the canister cap assembly 360. Furthermore, including the odor filter within the canister eliminates the costly and more difficult task of replacing the odor filter inside the pump assembly.

[0101] Using carbon filters of different sizes and shapes can enhance their effectiveness for different canister shapes. Nevertheless, the premise of the filtration system is that air must pass through the carbon disc, and the hydrophobic membrane remains the same for each of these different sizes and shapes of the carbon filter element and cap assembly 360. For any configuration, a spacer may be placed between the carbon filter and the hydrophobic membrane. This may be necessary to support the membrane and hold the carbon filter in the desired position.

[0102] The cap assembly 360 may also include a base cap support 392 which can be configured to provide a support surface for the filter 390 and / or other components of the cap assembly 360. The base cap support 392 may also have a shield or wall 393 configured to overlap or cover at least a portion of the filter 390 in order to prevent or stop liquid or seepage in the canister 346 from splashing onto at least a portion of the filter 390 and / or hydrophobic filter 386. For example, and but not limited to, the shield 393 may overlap at least 40% of the surface area of ​​the first main surface of the filter 390, or at least 50% of the surface area of ​​the first main surface of the filter 390, or at least 40% to at least 60% of the surface area of ​​the first main surface of the filter 390.

[0103] The shield 393 may have an opening 394 therein that allows air and / or other gases to pass through as air and / or other gases are drawn through the cap assembly 360 when the pump is operating. In some configurations, the shield 393 can block most of the surface of the filter 390, or 60% or approximately 60%, from exposure to the seepage in the canister 346. In other words, in some configurations, the opening 394 extending through the base cap support 392 can be reduced by 60% or approximately 60% or more with the shield 393 compared to the opening through the base cap support 392 without the shield 393. In some configurations, the opening 394 extending through the base cap support 392 can be reduced by 40% (or approximately 40% or less) to 80% (or approximately 80% or more), or 50% (or approximately 50%) to 70% (or approximately 70%) compared to the opening through the base cap support 392 without the shield 393.

[0104] The base cap support 392 may have a bottom support or standoff 396 capable of supporting the filter 390. One or more fluid passages 395 may be formed through the bottom support or standoff 396. The passages may communicate with a recess 399 formed within the base cap support 392 so that air passing through the passages 395 can pass through or fill the recess 399. In some arrangements, the recess 399 may be sized and configured to receive and support the filter membrane 390 therein. The recess 399 may be configured so that all air or gas coming from the canister body 346, or substantially all air or gas, must pass through the filter 390 before passing through the opening 373 of the cap assembly 360. The base cap support 392 may also have an annular flange or lip 402 on it.

[0105] Some arrangements of the base cap support 392 may also include one or more projections 400 that extend axially away from the upper surface of the cap assembly 360, such that during operation one or more projections 400 (two shown) extend into the internal space of the canister body 346.

[0106] Figures 6A, 6B, 6C, 6D, 6E, and 6F show other configurations of the filter 600 and filter support 602 that can be used for other configurations of the negative pressure wound treatment system 100, in place of or in addition to other filters described herein, along with any configuration of the negative pressure wound treatment system 100 disclosed herein. For example, as shown in Figure 6A, several configurations of the filter 600 and filter support 602 shown therein can filter odors, bacteria, and other substances or materials from the air drawn from a collection canister (e.g., canister 162). A hydrophobic filter 604 may be positioned on one or both sides of the filter 600. Air flows through the first opening 606 of the filter support 602 and can then be forced to pass through the filter 600 and hydrophobic filter 604 before entering the pump assembly (e.g., pump assembly 160). In the deformation shown in Figure 6B, air can pass through multiple openings 616 in the filter support 612 before passing through the filter 610 and the hydrophobic filter 614.

[0107] In the modification of the filter 610 shown in Figure 6B, the filter 610 may have a disc-shaped portion 610a and a tapered or conical portion 610b that extends downward toward the inside of the canister, for example, with the filter becoming progressively narrower as it extends away from the disc-shaped portion of the filter. The filter support 612 may have a shape that complements the shape of the filter 610. The opening 616 can pass through the conical or tapered portion of the filter support 612. This arrangement can increase the airflow path through the filter 610, thereby increasing the filtration of air leaving the canister, and can also increase the surface area of ​​the cover over the filter 610, thereby reducing the amount of the filter 610 that may be exposed to splashing or sloshing of seepage inside the canister.

[0108] The deformation of the filter 620 shown in Figure 6C may involve an increasing size towards the lower end of the filter 620, with a tapered shape that is narrowest at its upper end. The hydrophobic filter 624 may be spaced apart from the filter 620 by a spacer member 623. The filter support 622 may have a shape that complements the shapes of the filter 620, the spacer member 623, and the hydrophobic filter 624. An opening 626 on the bottom surface of the filter support 622 can provide a fluid passage for air passing through the filter 620.

[0109] Figures 6D, 6E, and 6F show additional variations in the shape of the filters 630, 640, 650 and filter supports 632, 642, 652 that can be used in any configuration of the negative pressure wound treatment system 100 disclosed herein. Hydrophobic filters 634, 644, 654 may be positioned on or adjacent to any of the filters 630, 640, 650, and one or more openings 636, 646, 656 may allow airflow through the filter supports 632, 642, 652.

[0110] In some configurations, the negative pressure wound treatment system 100 may have an odor filter that filters the exhaust flow from the pump module 248. The odor filter that filters the exhaust flow from the pump module 248 may be located inside or outside the housing 210, which may provide easier access for servicing and / or replacing the odor filter (i.e., if located outside the housing 210). In some configurations, the filter may be mounted on top of the canister 162.

[0111] In some configurations, the operation of such filters can be described as follows: A pump draws negative pressure over the canister contents through a first port, thereby drawing air and exudate from the covering material. The exudate can be separated within the canister, and the air can be drawn through the pump unit and discharged to a second port. A carbon filter may be mounted on the outside of the canister, and when the canister is properly installed in the apparatus, the filter is pushed up toward the second port. The exhaust air can be forced through a filter (which can be a carbon filter or any other suitable odor and / or bacterial type filter). The filter can remove bacterial byproducts before the exhaust air is discharged into the atmosphere.

[0112] The filter arrangements disclosed herein may utilize simple and low-cost filter technologies, such as, and not limited to, carbon-impregnated foam. Placing the filter on or inside the canister ensures filter replacement when the canister is changed. Furthermore, the filter may provide an exhaust muffling. In some arrangements, the filter may be a wet-side filter located inside the canister. Furthermore, in some arrangements, one or more additives may be added to the canister to reduce bacterial count or growth. Furthermore, in some arrangements, a dry filter may be located inside the canister cap, but in a separate compartment accessible only by the exhaust of the pump unit, not by the pump inlet. In some arrangements, this may include two ports on the canister cap: an inlet port and an outlet port.

[0113] Conventional NPWT pumps generate noise during operation. This noise stems from the mechanical movement of components within the pump (typically the pump head), which tends to form the air being drawn out and expelled by the pump. This noise can be disruptive to patients, and they may be inclined to turn off the pump to stop the noise, which can directly impact treatment outcomes. These treatment interruptions can slow the wound healing process.

[0114] Some configurations of the pump assembly 160 disclosed herein may include an in-line filter connected to a tube within the pump housing, as well as a baffle box for reducing noise from the pump motor. Some configurations of the pump assembly 160 may include a filter membrane on the exhaust port of the pump assembly 160. The filter membrane may include a Porex PTFE membrane vent, a Pall Verspor (e.g., and not limited to, Pall Verspor 1200 filter) vent, or any sheet-type membrane that can be attached to the housing of the pump assembly 160 at the exhaust port. In some configurations, the filter may have a disc shape and may be bonded to the housing of the pump assembly 160. In some configurations, the filter may be enclosed in a housing, cover, or a clamping lid that can be attached to the outer surface of the housing of the pump assembly 160. The filter may also include a paper filter sheet. Furthermore, some configurations of the filter may be configured to create an impermeable barrier that prevents fluid from entering the enclosure when the device is placed upside down or tilted. Furthermore, these filters may also be configured to provide additional filtration for odors discharged from the pump motor.

[0115] In some configurations, the tube 142 connected to the canister 162 may be long enough to connect to a covering or port located at least two feet, or at least three feet, or one to three feet or more away from the canister 162. The tube 142 may be connected to a connector 440 that extends away from the surface of the canister 162. The connector 440 may be configured to communicate fluidly with the internal space within the canister body 346 and to connect to the end of the tube 142. All or part of the tube 142 may wrap around the canister 162 if all or part of the tube 142 is not needed.

[0116] Several configurations of the negative pressure wound treatment system 100 may be configured to support the tubes 142 on or within the pump assembly 160 and / or canister 162 in order to manage the tubes 142. The tubes (such as tube 142) are reported by the patient to be invasive during daily activities. Since wounds may be located on different parts of the body, several configurations of the negative pressure wound treatment system 100 may be provided with tubes 142 of a length to accommodate the furthest-located wounds. Configuring the negative pressure wound treatment system 100 to manage any excess tubes may be beneficial in preventing the risk of tripping, preventing the risk of falling, and keeping the negative pressure wound treatment system 100 more orderly. Accordingly, several configurations of the negative pressure wound treatment system 100 disclosed herein may have one or more clips that are removable or non-removable attached to the exudate tubes 142 and can be used to secure excess tubes to the negative pressure wound treatment system 100. In some configurations, the tubing may be wrapped around the pump assembly 160 and / or canister 162, minimizing the tubing's external shape and allowing the user to control the length of the tubing that extends away from the negative pressure wound treatment system 100.

[0117] Referring to Figures 7A and 7B, in some arrangements, one or more tube supports 444 (also called clips) may be connected to or attached to the housing 210 of the pump assembly 160 (illustrated) or to a canister body 346 (not shown) and may be configured to selectively support the tube 142. Some arrangements of the tube supports 444 may be removablely attached to the canister body 346 or connected to the canister body 346. Furthermore, the tube supports 444 may have a closed opening 446 through which the tube 142 can pass, a first opening support 448 from which a portion of the tube can be removablely fixed or held, and / or an optional second opening support 450 from which a portion of the tube can be removablely fixed or held. The closed opening 446 may be used to permanently attach the tube 146 to the tube support 444. The tube support 444 may also have a retaining portion 454 that can be used to secure the tube support 444 to a receiving portion 456 of the housing 210 of the pump assembly 160. The pipe support 444 can move in and out of the slot 456, allowing for selective fixing of the pipe support 444 to the pump assembly 160 (illustrated) or the canister body 346 (not shown).

[0118] In some implementations, the tube support 444 can be secured to the housing 210 using slots or other mounting elements on the housing 210 or the canister body 346. In this implementation, the tube is then wrapped around the housing 210, and the tube support 444 secures an additional loop of the tube passing through the housing 210. The tube support 444 can also be configured to slide over the tube such that the tube support is positioned approximately midpoint on the tube (for example, the tube may pass through an enclosed opening 446 of the tube support 444). The tube can then be formed within a coil that can be removably secured to the tube support 444.

[0119] As shown, some configurations of the negative pressure wound treatment system 100 may have two or more tube supports 444, i.e., one on each of the two side portions of the negative pressure wound treatment system 100. In other configurations, the negative pressure wound treatment system 100 may have only one tube support 444, or three or more tube supports 444, depending on the length of the tube 142. Furthermore, the tube supports 444 may be positioned on any desired portion of the pump assembly 160 and / or the canister 162.

[0120] The tube support 444 may have any desired shape or features. For example, some implementations of the tube support 444 may be configured to have a strap around an opening or retaining portion to hold the tube 142 in the tube support 444. In other configurations, the tube 142 may be supported in an internal space or cavity within the pump assembly 160 and / or canister 162, where the tube can be wound up. In this configuration, the user can pull out the required or desired length of the tube from the internal space and then activate a locking mechanism to secure the rest of the tube within the internal space. In other configurations, the tube may be supported in a pouch or cavity attached to the outside of the pump assembly 160 and / or canister 162. In some configurations, the tube may be fused so that the portion of the tube that the user intends to use must be separated, and the rest of the tube is fixed or held in the negative pressure wound treatment system 100.

[0121] In some configurations, the pump assembly 160 may be configured such that its center of gravity is much lower than that of a conventional pump assembly. This improves the stability of the pump assembly 160 and the negative pressure wound treatment system 100 and reduces the likelihood of accidental tipping of the negative pressure wound treatment system 100. For example, and not limited to, the center of gravity may be approximately 40% of the total height of the pump assembly 160 (excluding the handle 208), or 35% (or approximately 35%) to 50% (or approximately 50%) of the total height of the pump assembly 160 (excluding the handle 208). Furthermore, as shown, the buttons and other inputs on the interface panel 170 may be located on the top surface of the pump assembly 160 such that the input force applied to the pump assembly 160 when a user provides physical input to the pump is approximately downward. This may reduce the likelihood of the pump assembly 160 accidentally tipping over when a user provides input to the pump assembly 160.

[0122] Figure 9 shows a schematic diagram of a control system 1300 that can be used in any of the wound therapy devices described herein, such as wound therapy device 110' and / or wound therapy device 110. The control system 1300 may be similar to the electronic assembly described herein. The electrical components may operate to receive user inputs, provide outputs to the user, operate pressure sources, provide connections, etc. A first processor (such as the main controller 1310) may be responsible for user activities, and a second processor (such as the pump controller 1370) may be responsible for controlling another device, such as the pump 1390.

[0123] The input / output (I / O) module 1320 can be used to control inputs and / or outputs to other components or devices, such as the pump 1390 or one or more sensors (e.g., one or more pressure sensors 1325 configured to monitor pressure at one or more locations in a fluid flow path). For example, the I / O module may receive data from one or more sensors via one or more ports, such as serial (e.g., I2C), parallel, hybrid ports, and similar. Any of the pressure sensors may be part of a wound healing device or canister. In some cases, any of the pressure sensors 1325 may be located remotely from the wound healing device, such as in or near the wound (e.g., in a dressing or a conduit connecting the dressing to the wound healing device). In such implementations, any of the remote pressure sensors may communicate with the I / O module via a wired connection or with one or more transceivers 1340 via a wireless connection.

[0124] The main controller 1310 can receive and provide data to and from one or more expansion modules 1360, such as one or more USB ports, SD ports, compact disc (CD) drives, DVD drives, FireWire ports, Thunderbolt ports, PCI Express ports, etc. The main controller 1310, together with other controllers or processors, can store data in memory 1350 (such as one or more memory modules) which may be located inside or outside the main controller 1310. Any suitable type of memory may be used, including volatile or non-volatile memory such as RAM, ROM, magnetic memory, solid memory, and magnetoresistive random access memory (MRAM).

[0125] The main controller 1310 may be a general-purpose controller such as a low-power processor or an application-specific processor. The main controller 1310 may be configured as a “central” processor within the electronic architecture of the control system 1300, and the main controller 1310 may be able to harmonize the activities of other processors, such as the pump controller 1370, one or more communication controllers 1330, and one or more additional processors 1380. The main controller 1310 can run a suitable operating system such as Linux®, Windows CE, or VxWorks.

[0126] The pump controller 1370 can control the operation of a pump 1390 that can generate negative or reduced pressure. The pump 1390 may be a diaphragm pump, peristaltic pump, rotary pump, rotary vane pump, scroll pump, screw pump, fluid-seal pump, membrane pump operated by a piezoelectric transducer, or voice coil pump. The pump controller 1370 can use data received from one or more pressure sensors 1325 to measure the pressure in the fluid passage, calculate the fluid flow rate, and control the pump. The pump controller 1370 can control the pump actuator (such as a motor) so that a desired level of negative pressure is achieved within the wound 104. The desired level of negative pressure may be selected by pressure setting or by the user. The pump controller 1370 can control the pump (e.g., a pump motor) using pulse width modulation (PWM) or pulse control. The control signal for driving the pump may be a 0-100% load cycle PWM signal. The pump controller 1370 can perform flow rate calculations and detect alarms. The pump controller 1370 can communicate information to the main controller 1310. The pump controller 1370 may be a low-power processor.

[0127] One or more communication controllers 1330 may provide a connection (such as a wired or wireless connection 1332). One or more communication controllers 1330 may utilize one or more transceivers 1340 to transmit and receive data. One or more transceivers 1340 may include one or more antennas, optical sensors, optical transmitters, vibration motors or transducers, vibration sensors, acoustic sensors, ultrasonic sensors, etc. One or more transceivers 340 may function as a communication controller. In such cases, one or more communication controllers 330 may be omitted. One or more transceivers 340 may be connected to one or more antennas to facilitate wireless communication. One or more communication controllers 1330 may provide one or more of the following types of connections: Global positioning systems (GPS), cellular connectivity (e.g., 2G, 3G, LTE, 4G, 5G, etc.), NFC, Bluetooth connectivity (or BLE), radio frequency identification (RFID), wireless local area networks (WLAN), wireless personal area networks (WPAN), WiFi connectivity, internet connectivity, optical connectivity (e.g., using infrared, barcodes such as QR Code®, etc.), acoustic connectivity, ultrasonic connectivity, etc. These connections can be used for a variety of activities, including tracking the location of pump assemblies, asset tracking, compliance monitoring, remote selection, logging, alarms, and uploading other operational data, as well as adjusting therapy settings, upgrading software or firmware, and pairing.

[0128] One or more communication controllers 1330 may provide dual GPS / cellular functionality. The cellular functionality may be, for example, 3G, 4G, or 5G functionality. One or more communication controllers 1330 may communicate information to the main controller 1310. One or more communication controllers 1330 may include internal memory or utilize memory 1350. One or more communication controllers 1330 may be a low-power processor.

[0129] The control system 1300 can store data such as GPS data, therapy data, device data, and event data. This data can be stored, for example, in memory 1350. This data may include patient data collected by one or more sensors. The control system 1300 can track and log therapy and other operational data. This data can be stored, for example, in memory 1350.

[0130] Using connections provided by one or more communication controllers 1330, the control system 1300 can upload any data stored, maintained, or tracked by the control system 1300 to a remote computing device, such as device 1334. The control system 1300 can also download various operational data, such as therapy selections, parameters, firmware, and software patches and upgrades (for example, via a connection to device 1334). One or more additional processors 1380 may be utilized, such as a processor for controlling one or more user interfaces (such as one or more displays). In some cases, any of the exemplary or described components of the control system 1300 may be omitted depending on the configuration of the wound monitoring or treatment system in which the control system 1300 is used.

[0131] Any of the negative pressure wound therapy devices described herein may include one or more features disclosed in U.S. Patent No. 9,737,649 or U.S. Patent Publication WO2017 / 0216501, each of which is incorporated by reference.

[0132] Multiple dressing negative wound therapy Figure 10 illustrates another negative pressure wound treatment system 1400. The system 1400 may include a wound treatment device, such as a wound treatment device 110, which can supply negative pressure to a wound site(s). The wound treatment device 110 may be in fluid communication with one or more wound dressings 1406a, 1406b (collectively referred to as 1406) to supply negative pressure to one or more wounds, such as wounds 104a and 104b. The fluid connection between the wound dressing 1406 and the wound treatment device 110 may be called a fluid channel (e.g., a path through which fluid drawn from the wound via negative pressure flows). The first fluid channel may include components that provide a fluid connection from the wound treatment device 110 to the first wound dressing 1406a. In non-limiting embodiments, the first fluid channel may include a passage from the wound dressing 1406a to the wound dressing 110, or a passage from the first wound dressing 1406a to the inlet 1446 of the branch attachment (or connector) 1444, in a fluid connection with the wound healing device 110. Similarly, the second fluid channel may include components that provide a fluid connection from the wound healing device 110 to the second wound dressing 1406b.

[0133] System 1400 may be similar to System 100, except that multiple wounds 104a and 140b are treated by System 1400. System 1400 may include any one or more of the components of System 100 (wounds 104a and 104b, covers 106a and 106b, etc.) shown in Figure 4 with the added letters "a" or "b" to distinguish the first wound from the second wound. As illustrated, System 1400 may include multiple wound dressings 1406a, 1406b (and corresponding fluid channels) that are in fluid communication with the wound therapy device 110 via multiple suction adapters such as adapter 108. The suction adapter may include any one or more of the components of adapter 108 (such as bridge portions 130a and 130b, connectors 134a and 134b, and caps 140a and 140b, etc.) shown in Figure 4, along with the added letters "a" or "b" to distinguish between the first wound and the second wound.

[0134] The suction adapters for systems 1400a and 1400b may include a controlled leak channel fluidically separated from the suction channel. Each wound dressing and fluid channel may contain various features or elements that correspond to or are similar to those of other wound dressings or fluid channels within the system. For ease of reference, one or more corresponding features or elements may be collectively referred to using a corresponding unalphabetical reference number. For example, wound dressings 1406a and 1406b may be collectively referred to as wound dressing 1406. However, it should be noted that in some configurations, collectively referred elements may not be identical and may have different features or attributes.

[0135] In some configurations, the dressings 1406a, 1406b may be placed over openings or openings formed in each of the respective drapes or wound covers 106a, 106b, which are placed over suitably prepared wounds 1430a, 1430b, and which in some cases may be filled with wound packing material such as foam or gauze. The wound therapy device 110 may be fluidically connected to the inlet 1446 of the connector 1444 via the tube 142. The connector 1444 may be fluidly connected to the connectors 134a, 134b, which can be fluidly connected to the tubes or conduits 130a, 130b via the branches 1445a, 1445b and the tubes or conduits 1442a, 1442b. The tubes or conduits 130a, 130b may be fluidly connected to the dressings 1406a, 1406b. Once all conduits and wound dressing components are connected and operationally positioned, the wound healing device 110 can be activated to supply negative pressure to wounds 1430a and 1430b via the fluid channels. The application of negative pressure may continue until the desired level of healing of wounds 1430 is achieved. Although two wounds and wound dressings are shown in Figure 4, several implementations of the wound healing device 110 can provide treatment to a single wound (for example, by closing an unused branch 1445a or 1445b of connector 1444) or to three or more wounds (for example, by adding branches to connector 1444).

[0136] In any configuration disclosed herein, the inlet manifold branching attachment 1444 or conduit may include one or more valves, clamps, caps, air leaks, or other flow control mechanisms that can be configured to allow fluid to flow into the fluid passage or to block or restrict the flow or passage of fluid through the fluid passage. In some arrangements, the valves, air leaks, or other flow control mechanisms of the inlet manifold branching attachment 1444 may be opened or closed electronically. For example, the controller of the wound therapy device 110 may communicate with the valves, air leaks, etc., and open or close each individually or as a unit. This communication may be wired or wireless.

[0137] In some configurations, the system 1400 can apply negative pressure to one or more wounds. The level of negative pressure in one or more wounds (e.g., under one or more wound dressings) can be sufficiently close to the level of negative pressure in the negative pressure source. For example, the acceptable level of pressure maintained in the wound may be within ±1 mmHg, ±5 mmHg, ±10 mmHg, ±25 mmHg, etc., of the negative pressure setpoint. In some configurations, this pressure can be maintained within 95% (or another appropriate percentage) of the time the system 1400 applies negative pressure. In some configurations, the acceptable pressure level may include a pressure range of -40 to -120 mmHg. However, other pressure levels may be used as described herein.

[0138] One or more air leaks, such as air leaks in one or more fluid channels, can be used to determine one or more operating conditions within a system. For example, an air leak may be a controlled air leak that allows a relatively constant flow of air, gas, or other fluid into the fluid channel. In some configurations, the flow from the air leak to the fluid channel can be configured and / or controlled so that it does not increase significantly even when additional negative pressure is applied to the system. However, the presence of an air leak in the system may maintain a substantially constant baseline flow through the system when a steady state is achieved (e.g., when a negative pressure setpoint is reached). The presence of an air leak may necessitate further activation of the negative pressure source to maintain a desired negative pressure level in the wound. Thus, the system may determine the presence of one or more operating conditions (such as blockage, leakage, canister fullness, or misalignment of the suction adapter) by monitoring the flow through the fluid channel, which can be measured directly or indirectly, for example, based on monitoring the activity of the negative pressure source.

[0139] In some configurations, each fluid channel may contain an air leak, and each air leak in each fluid channel may allow different flow rates of air, gas, or other fluids to enter the system. In other words, each air leak in the system may have a different leak rate. For example, the leak rate of an air leak may be based at least in part on the size or shape of the air leak, whether the air leak contains a filter, its size or porosity level or the filter, the level of blockage of the air leak or filter, etc. The fluid entering a fluid channel increases the flow rate of that fluid channel.

[0140] Therefore, each fluid channel in system 1400 may have a different flow rate. The total flow rate (TFR) of system 1400 (e.g., the aggregate flow to each wound dressing) can be monitored, calculated, or determined and then used to determine the operating conditions of system 1400. Operating conditions may include, for example, a "no flow" state (e.g., all channels are blocked), a blocked state of one or more channels (e.g., a blocked state exists in a first fluid channel, a blocked state exists in a second fluid channel, etc.), a canister full state, and a normal state (e.g., no blockages in any of the fluid channels).

[0141] System 1400 may include one or more features disclosed in U.S. Patent Publication WO2020 / 0069850 or International Publication WO2018 / 167199, each of which is incorporated by reference as a whole.

[0142] In some configurations, the system 1400 may provide indicators, such as alarms, to communicate the operating status of the system 1400 to the user, based on a comparison of the determined total flow rate with one or more flow thresholds. In some configurations, flow thresholds corresponding to the operating conditions of the system 1400 may be predetermined. In some configurations, the flow thresholds are at least in part based on dynamic measurements or calculations of the system 1400, such as flow rate or pressure, during a particular mode of the system (e.g., calibration mode).

[0143] handle Figures 8A, 8B, 8C, and 8D show alternative configurations of the handle 1208 that may be used with any implementation of the pumping device disclosed herein (including, for example, any configuration of the pumping device 160, but not limited to). In some configurations, the handle 1208 may be configured to selectively change between at least a first state and a second state. Some configurations of the handle 1208 may be more flexible in the first state than in the second state, and / or more rigid or have a more solid feel in the second state than in the second state. In some configurations, the handle 1208 may be configured to change between the first state and the second state by flipping the handle 1208. Referring, for example, to Figures 8A and 8B, the implementation of the handle 1208 is shown in the first state, where the handle is more flexible. The same handle 1208 is shown in Figures 8C and 8D in the second state, where the handle is more rigid or has a more solid feel.

[0144] Referring to Figures 8A, 8B, 8C, and 8D, the handle 1208 may have a base 1210 having a first opening 1212 and a second opening 1212 through the end of the base 1210. The first and second openings 1212 may be used to connect the handle 1208 to the pump device using any suitable fastener. However, in other configurations, the handle 1208 may be connected to the pump device using any suitable feature, including a reversible locking mechanism similar to a cable tie, latch mechanism, or other quick-release connector. For example, the pump device may have a push-down feature that can be used to selectively release the end of the handle 1208 so that the handle can be removed and changed from a first state to a second state, or replaced with a second handle that is more rigid or more flexible. In a further embodiment, some arrangements of the pump assembly 160 may have a lobe on the pump housing 210 corresponding to a complementary feature of the handle 208, so that the handle 208 can only be removed and / or installed when the handle 208 is in its fully forward position. When the handle 208 is pulled straight or extends to its fully rearward position, the lobe may be configured to engage with a ring inside the handle mounting boss, which keeps the handle 208 connected to the lobe, while allowing the handle 208 to rotate freely relative to the housing 210.

[0145] The handle 1208 may also have a plurality of compression elements 1216 projecting away from the first surface 1218 of the base 1210. When the handle 1208 is in the first or flexible state, as shown in Figure 8A, the first surface 1218 may generally extend outward or face outward, and the compression elements 1216 also generally face outward (radially outward in some arrangements). The compression elements 1216 may have a substantially trapezoidal or tapered shape in some arrangements, and there may be a space 1220 between each of the compression elements 1216, at least when the handle 1208 is in the first or flexible state. When the compression elements 1216 face outward in the first state as shown in Figure 8A, the curvature of the base 1210 can cause the space 1220 to expand or release so that the ends of the compression elements 1216 do not come into contact with each other. When the compression element 1216 is facing inward, as in the second state as shown in Figure 8C, the curvature of the base 1210 can cause the ends of the compression element 1216 to eliminate the space between them, bring them into contact with each other, and / or compress each other, thereby increasing the rigidity or stiffness of the handle 1208 and inhibiting the flexibility of the handle 1208.

[0146] In other configurations, the base 1210 may be made of a stretchable fabric having compression elements (also referred to herein as studs), each preferably having a trapezoidal or suitable shape projecting away from one of the main surfaces of the base, which gives greater flexibility and a strap-like feel in the flexible orientation, but maintains rigidity in the orientation where the trapezoidal studs intersect. In any configuration disclosed herein, the compression elements can have any desired shape and are not limited to a trapezoidal shape. For example, and not limited to, the compression elements 1216 may have any suitable or desired shape with tapered surfaces between each element, allowing the handle to be flexible when there is space between each of the compression elements 1216 and more rigid when each of the compression elements 1216 is in contact with an adjacent compression element 1216.

[0147] Figures 11A, 11B, 11C, and 11D show arrangements of canister assembly 1600 that may be used in any of the pump assembly arrangements disclosed herein, including any arrangement of pump assembly 160 disclosed herein. Figure 11D is a cross-sectional view of canister assembly 1600 through line 11D-11D shown in Figure 11C. Any arrangement of canister assembly 1600 disclosed herein may have any of the components, features, or other details of any other canister assembly arrangement disclosed herein, including, but not limited to, any of the arrangements of canister 162 described above, in any combination with any of the components, features, or details of canister assembly 1600 disclosed below. Similarly, any component, feature, or other detail of any other canister or canister assembly arrangement disclosed herein may, in any combination with any component, feature, or detail of any arrangement of the canister assembly 1600 disclosed herein, have any component, feature, or other detail of any arrangement of the canister assembly 1600 disclosed herein.

[0148] In any configuration disclosed herein, the canister assembly 1600 may have a canister body 1602, a conduit or tube 1606 having a clip 1607 and a connector 1608 at its distal end, a connector interface 1618, and a filter assembly 1620 housed within the canister body 1600. The canister body 1602 may also have one or more flanges 1627 (three as shown) that engage with, or are configured to engage with, latches, projections, or other selectively or non-selectively fixable tabs or other features of the pump assembly (such as, but not limited to, the latches 304, 306, and / or latch 282 of the locking arms 266, 268 described above). The canister body 1600 may have a first or upper portion 1602a and a second or lower portion 1602b, and may be any desired size including 300 mL or approximately 300 mL, or 200 mL or approximately 200 mL to 400 mL or approximately 400 mL. The first portion 1602a can be connected to the second portion 1602b. For example, and not limited to, the first portion 1602a may be welded, glued, or otherwise fixed to the second portion 1602b. In other arrangements, the first portion 1602a may be formed integrally with the second portion 1602b. The components of the canister body 1602 may be injection molded or formed by any other suitable method. The sealing ring 1636 may be positioned around the outer surface of the connector interface 1618 (for example, within an annular groove 1619 formed within the connector interface 1618). In some configurations, the connector interface 1618 may be formed integrally with the first body portion 1602a. A removable cap 1612 for the pipe connector 1608 can be connected to the pipe 1606 near the pipe connector 1608.

[0149] In any configuration disclosed herein, the canister assembly 1600 may also have a gelling agent 1622 (which may be in a package or bag) positioned within the internal space 1624 of the canister body 1602, configured to increase the thickness or viscosity of a liquid that may contain wound exudate within the internal space 1624. In some configurations, the gelling agent 1622 may be fixed between a first projection 1630 extending away from the inner wall of a first portion 1602a toward a second portion 1602b and a second projection 1632 extending away from the inner wall of a second portion 1602b toward the first portion 1602a. For example, the gelling agent 1622 may be sandwiched between the first projection 1630 and the second projection 1632. In this configuration, the first and second projections 1630, 1632 can be used to prevent the gelling agent 1622 from moving around the internal space 1624 of the canister body 1602.

[0150] Referring to Figure 11D, the filter assembly 1620 may include a hydrophobic filter 1640, an odor filter 1642, and a dust filter 1644, which may be used to filter air passing from the internal space 1624 of the canister body 1602 through the opening or passage 1621 of the connector interface 1618 to the pump assembly, and which may be used to prevent (e.g., prevent) dust or other particles from passing through the pump assembly. The odor filter 1642 may also be configured to filter bacteria from the air flowing through the filter assembly 1620. The hydrophobic filter 1640 may be used to prevent any liquid from leaking out of the canister body 1602 and coming into contact with the odor filter 1642. The odor filter 1642 may include any suitable filter membrane or material containing carbon. For example, and not limited to, some arrangements of the odor filter 1642 may include compressed carbon. The filter assembly 1620 is also shown in Figures 12C and 12D. The first body portion 1602 may have one or more protrusions or standoffs formed on the inner surface of the first body portion 1602, similar to or in the same way as the protrusion 1765 formed on or positioned on the first body portion 1702 of the canister assembly 1700 shown in Figure 12D. The protrusions can be used to space the dust filter 1644 away from the planar surfaces in the first body portions 1602a, 1702a, allowing for a larger airflow through the dust filter 1644.

[0151] In some configurations, the filter 1642 may include a carbon-activated foam material. In some configurations, the filter 1642 may include compressed carbon elements as part of a filtration system within the canister. The carbon elements may have various shapes and sizes depending on the canister. Different sizes and shapes of carbon filters can be used to enhance their effectiveness for different canister shapes. The filter assembly 1620 may be optionally positioned within a recess formed in the first body portion 1602a, such as the recess 1767 formed within the first body portion 1702a, as shown in Figure 12D.

[0152] The filter assembly 1620 may be supported at its lower or inner end by a base support 1650 which may be configured to provide a support surface for the hydrophobic filter 1640 and / or other components of the filter assembly 1620. The base support 1650 may have one or more openings 1652 through its main surface 1653 through which air and / or other gases can pass as the air and / or other gases are drawn out by a pump through the filter assembly 1620.

[0153] Several arrangements of the base support 1650 may optionally be configured to support a sensor or a plurality of sensors and / or other electronic components. Referring to Figure 12C, several arrangements of the base support 1650 may have a support surface 1654 configured to support a sensor 1658 and / or other electronic components. For example, and but not limited to, the base support 1650 may have a support surface substantially parallel to the top surface of the canister assembly 1600. In some arrangements, the base support 1650 may also have one or more support tabs 1655 (two shown) to provide additional support for a sensor or a plurality of sensors and / or other electronic components. For example, a sensor may include a pair of electrodes configured to determine the fill level of the canister or to detect that the canister is fully responsive to the detection of an electric current performed between electrodes via a liquid (e.g., wound exudate) drawn into the canister. A support tab 1655 may support a pair of electrodes that may be positioned on the outward side of the support tab 1655.

[0154] The support tabs 1655 may extend away from the support surface 1654 toward the bottom of the canister. The support tabs 1655 may have flanges or shields 1657 at each distal end to prevent liquid in the canister (e.g., wound exudate) from splashing onto the support tabs 1655 and / or electronic components 1658 (e.g., electrodes), and to prevent exposure of the gel packet 1622 or gelling agent to the mound. In some configurations, the flanges 1657 may extend at an angle away from the support tabs 1655 (e.g., perpendicular angles). In other configurations, the flanges 1657 may extend at an angle greater than or less than 90 degrees relative to the support tabs 1655.

[0155] In some configurations, the electronic component 1658 may optionally be a fill level sensor or a canister full sensor. The fill level sensor may have a wireless transmitter (which may optionally be a short-range transmitter) that can be configured to communicate status information (such as whether the detected fill level or canister is full) to the pump assembly or other wireless receiver, or it may have a wired connection through the canister to communicate with the pump assembly.

[0156] The base support 1650 may have an annular flange 1660 around its periphery and a recess 1662 that can be configured to receive and support at least the hydrophobic filter 1640. The base support 1650 may optionally be joined by welding, bonding, or otherwise within the inner surface of the first body portion 1602a of the body 1602 of the canister assembly 1600 before the first and second portions 1602a, 1602b of the body 1602 are joined together.

[0157] Figures 12A, 12B, 12C, and 12D show alternative configurations of the canister assembly 1700 that may be used in any of the pump assembly configurations disclosed herein, including any configuration of the pump assembly 160 disclosed herein. Any configuration of the canister assembly 1700 disclosed herein may, in any combination with any component, feature, or detail of any other canister assembly configuration disclosed herein, including, but not limited to, any configuration of the canister 162 and / or canister assembly 1600 described above. Similarly, any component, feature, or detail of any other canister or canister assembly configuration disclosed herein may, in any combination with any component, feature, or detail of any canister or canister assembly configuration, have any component, feature, or detail of any configuration of the canister assembly 1700 disclosed herein.

[0158] In any configuration disclosed herein, the canister assembly 1700 may have, as described above, a canister body 1702, a conduit or tube 1606 having a connector 1608 at its distal end, a connector interface 1618, and a filter assembly 1620 housed within the canister body 1700. The canister body 1700 may have a first or upper portion 1702a and a second or lower portion 1702b, and may be any desired size, including 800 mL or approximately 800 mL, or 600 mL or approximately 600 mL to 1000 mL or approximately 1000 mL. In any configuration disclosed herein, the canister assembly 1700 may also have a gelling agent 1622 (which may be in a package or bag) located within the internal space 1724 of the canister body 1702.

[0159] Referring to Figure 12D, the filter assembly 1620 in the arrangement of canister assemblies 1600, 1700 may include a hydrophobic filter 1640, an odor filter 1642 which may optionally be upstream of the hydrophobic filter 1640, and a dust filter 1644 which may optionally be upstream of the odor filter 1642 and can be used to prevent (e.g., stop) dust or other particles from passing through the pump assembly. The filter assembly 1620 may be supported at its lower or inner end by a base support 1650 which may be configured to provide a support surface for the hydrophobic filter 1640 and / or other components of the filter assembly 1620. The base support 1650 may optionally be joined by welding, bonding, or other means within the inner surface of the first body portion 1702a of the body 1702 of the canister assembly 1700 before the first and second portions 1702a and 1702b of the body 1702 are joined together.

[0160] Figures 13A and 13B show alternative configurations of canister assembly 1800 that can be used in any of the pump assembly configurations disclosed herein, including any configuration of pump assembly 160 disclosed herein. Figures 14A and 14B show alternative configurations of canister assembly 1900 that can be used in any of the pump assembly configurations disclosed herein, including any configuration of pump assembly 160 disclosed herein.

[0161] In any arrangement disclosed herein, any component, feature, or other detail of canister assembly 1800 or canister assembly 1900 may, in any combination with any component, feature, or detail of canister assemblies 1800, 1900 disclosed below, have any component, feature, or other detail of any other canister assembly arrangement disclosed herein, including but not limited to any of the arrangements of canister 182 and canister assemblies 1600, 1700 described above. Similarly, any component, feature, or other detail of any other canister or canister assembly arrangement disclosed herein may, in any combination with any component, feature, or detail of canister or canister assembly 1800, 1900 disclosed herein, have any component, feature, or other detail of any arrangement of canister assemblies 1800, 1900 disclosed herein.

[0162] Some arrangements of the canister assembly 1900 may be identical to those of the canister assembly 1800, except for the size or volume of the canister assembly. The canister body 1800 may have any desired size or capacity, including 300 mL or approximately 300 mL, or 200 mL or approximately 200 mL to 400 mL or approximately 400 mL. The canister body 1900 may have any desired size or capacity, including 800 mL or approximately 800 mL, or 600 mL or approximately 600 mL to 1000 mL or approximately 1000 mL.

[0163] In any arrangement disclosed herein, canister assemblies 1800, 1900 may each have a canister body 1802, 1902, a conduit or tube 1606 having a clip 1607 and a connector 1608 at its distal end, a connector interface 1818, and a cap assembly 1820 that can be connected to the canister body 1800. The tube 1606 can be connected to a tube connector 1609 that can be fixed to the canister body 1802, 1902. The canister body 1802 may be blow-molded or formed by any desired or suitable method. The canister assemblies 1800, 1900 may have a cap assembly 1820 that includes, but is not limited to, any arrangement of cap assembly 360 described above, and may have any of the components, features or other details of any other cap assembly arrangement disclosed herein, in any combination with any of the components, features or details of the cap assembly 1820 disclosed below. Similarly, any component, feature, or other detail of any of the other cap assembly arrangements disclosed herein may, in any combination with any of the components, features, or details of any of the cap assembly components, features, or details of any of the cap assembly arrangements 1820 disclosed herein.

[0164] In some configurations, the cap assembly 1820 may be configured to be removably connected (e.g., and not limited to, screw-connected) to an opening (such as 1903 shown in Figure 14C) in the canister bodies 1802, 1902. In some configurations, the cap assembly 1820 may be welded to the canister bodies 1802, 1902, or otherwise irremovably connected to the canister bodies. Some configurations of the cap assembly 1820 may include a cover or a first cap member 1822 having a connector interface 1823 which may have an opening 1824 extending axially through the central portion of the first cap member 1822. The connector interface 1823 may project axially away from the first main surface of the first cap member 1822. The connector interface 1823 may have a substantially cylindrical shape and an annular flange formed thereon, which may be configured to receive a seal such as an O-ring 1825. The opening 1824 may be configured to provide a fluid passage for air and / or other gases within the canister bodies 1802, 1902, allowing them to pass through and exit the canister bodies 1802, 1902.

[0165] The cap assembly 1820 may include a top filter 1826 and an odor filter 1828. The top filter 1826 may be a hydrophobic filter and / or a dust filter. The odor filter 1828 may also be configured to filter bacteria from the air flowing through the filter 1828. The top filter 1826 may be used to prevent any liquid from leaking out of the canister body 1802, 1902 through the opening 1824 of the first cap member 1822 and may be positioned above one or both sides of the odor filter 1828. The odor filter 1828 may include any suitable filter membrane or material containing carbon. For example, and not limited to, some arrangements of the odor filter 1828 may include compressed carbon.

[0166] The cap assembly 1820 may also include a base cap support 1830 which may be configured to provide a support surface for one or more of the filters 1826, 1828 and / or other components of the cap assembly 1820. The base cap support 1830 is configured to block or shield one or more filters 1826, 1828 from seepage and / or other liquids in the canister. In some arrangements, the base cap support 1830 may have a main surface 1840 which can overlap or cover at least a portion of the filter 1828 to prevent or stop liquid or seepage in the canister 1802, 1902 from splashing onto at least a portion of the odor filter 1828 and / or upper filter 1826. For example, and not limited to, the main surface 1840 may overlap with at least 80% of the surface area of ​​the lower main surface of the odor filter 1828, or at least 90% of the surface area of ​​the lower main surface of the filter 1828, or at least 60% or approximately 60% to 90% or approximately 90% of the surface area of ​​the first main surface of the filter 1828.

[0167] The base cap support 1830 may have one or more openings 1844 formed therein, through which air and / or other gases can pass when air and / or other gases are drawn out through the cap assembly 1820 while the pump is operating. The cap assembly 1820 may be configured such that all air or gas, or substantially all air or gas, coming from the canister bodies 1802, 1902 must pass through the filter 1828 before passing through the openings 1844 of the cap assembly 1820. In some arrangements, there may be three or more, four or more, or five or more openings 1844 formed within the base cap support 1830. The openings 1844 may be formed in walls perpendicular to the upper main surfaces of the canister bodies 1802, 1902 so that there is little chance of seepage splashing or passing through the openings 1844, for example, the openings 1844 may be formed in the vertical walls of the base cap support 1830.

[0168] In any configuration disclosed herein, the canister assemblies 1800, 1900 may also have a gelling agent (which may be in a package or bag) located within the internal space of the canister body 1802, 1902, configured to increase the thickness or viscosity of the liquid that may contain wound exudate.

[0169] Figure 15A is a top, front, and left side perspective view of the arrangement of the device 2000 for applying negative pressure to a wound.

[0170] Figure 15B is a front view of the arrangement of apparatus 2000 shown in Figure 15A.

[0171] Figure 15C is a rear view of the arrangement of apparatus 2000 shown in Figure 15A.

[0172] Figure 15D is a right side view of the arrangement of apparatus 2000 shown in Figure 15A.

[0173] Figure 15E is a left side view of the arrangement of apparatus 2000 shown in Figure 15A.

[0174] Figure 15F is a top view of the arrangement of apparatus 2000 shown in Figure 15A.

[0175] Figure 15G is a bottom view of the arrangement of apparatus 2000 shown in Figure 15A.

[0176] Figure 16A is a top, front, and left side perspective view of another configuration of the device 2100 for applying negative pressure to a wound.

[0177] Figure 16B is a front view of the arrangement of the device 2100 shown in Figure 16A.

[0178] Figure 16C is a rear view of the arrangement of the device 2100 shown in Figure 16A.

[0179] Figure 16D is a right side view of the arrangement of the apparatus 2100 shown in Figure 16A.

[0180] Figure 16E is a left side view of the arrangement of the apparatus 2100 shown in Figure 16A.

[0181] Figure 16F is a top view of the arrangement of the apparatus 2100 shown in Figure 16A.

[0182] Figure 16G is a bottom view of the arrangement of the apparatus 2100 shown in Figure 16A.

[0183] Figure 17A is a top, front, and left side perspective view of another configuration of the device 2200 for applying negative pressure to a wound.

[0184] Figure 17B is a front view of the arrangement of the apparatus 2200 shown in Figure 17A.

[0185] Figure 17C is a rear view of the arrangement of the device 2200 shown in Figure 17A.

[0186] Figure 17D is a right side view of the arrangement of the apparatus 2200 shown in Figure 17A.

[0187] Figure 17E is a left side view of the arrangement of the apparatus 2200 shown in Figure 17A.

[0188] Figure 17F is a top view of the arrangement of the apparatus 2200 shown in Figure 17A.

[0189] Figure 17G is a bottom view of the arrangement of the apparatus 2200 shown in Figure 17A.

[0190] Figure 18A is a top, front, and left side perspective view of another configuration of the device 2300 for applying negative pressure to a wound.

[0191] Figure 18B is a front view of the arrangement of the apparatus 2300 shown in Figure 18A.

[0192] Figure 18C is a rear view of the arrangement of the apparatus 2300 shown in Figure 18A.

[0193] Figure 18D is a right side view of the arrangement of the apparatus 2300 shown in Figure 18A.

[0194] Figure 18E is a left side view of the arrangement of the apparatus 2300 shown in Figure 18A.

[0195] Figure 18F is a top view of the arrangement of apparatus 2300 shown in Figure 18A.

[0196] Figure 18G is a bottom view of the arrangement of the apparatus 2300 shown in Figure 18A.

[0197] In any of the arrangements 2000, 2100, 2200, and 2300 illustrated and described herein, any of the solid lines in such arrangements may be dashed lines used to indicate features that are not part of the claimed decorative design. The scope of this disclosure encompasses all illustrated lines, whether dashed or solid.

[0198] Other variations While some configurations describe negative pressure wound therapy, the systems, apparatuses, and / or methods disclosed herein may be applied standalone or in addition to TNP therapy to other types of available therapies. The systems, apparatuses, and / or methods disclosed herein may be extended to any medical device, in particular any wound treatment device. For example, the systems, apparatuses, and / or methods disclosed herein may be used with devices that provide one or more of the following: ultrasound therapy, oxygen therapy, nerve stimulation, microwave therapy, activators, antibiotics, antimicrobial agents, or similar. Such devices may further provide TNP therapy. The systems and methods disclosed herein are not limited to medical devices and may be utilized by any electronic device.

[0199] Any transmission of data described herein can be carried out securely. For example, encryption, the HTTPS protocol, a secure VPN connection, error checking, delivery confirmation, or similar measures may be used.

[0200] Any values ​​provided herein, such as thresholds, limits, and periods, are not intended to be absolute values ​​and may therefore be approximate. In addition, any thresholds, limits, periods, etc., provided herein may be fixed or changed automatically or by the user. Furthermore, as used herein, terms expressing relative degrees such as exceeding, greater than, and less than a reference value are intended to include cases where the value is equal to the reference value. For example, exceeding a positive reference value may include being greater than or equal to the reference value. In addition, as used herein, terms expressing relative degrees such as exceeding, greater than, and less than a reference value are intended to include the opposite of the disclosed relationships such as falling below, less than, and greater than a reference value.

[0201] Any features, materials, properties, or groups described in relation to a particular aspect, arrangement, or example should be understood to be applicable to any other aspect, arrangement, or example described herein, insofar as they do not contradict it. All features disclosed herein (including the appended claims, abstract, and drawings) and / or all steps of any method or process disclosed herein may be combined in any combination, except for any combination in which at least some of such features and / or steps are mutually exclusive. Protection is not limited to the details of the arrangement described herein. The subject matter of protection extends to any novel features or any novel combination of features disclosed herein (including any appended claims, abstract, and drawings), or any novel steps or any novel combination of any method or process steps disclosed herein.

[0202] While specific configurations have been described, these configurations are presented only as examples and are not intended to limit the scope of protection. In fact, the novel methods and systems described herein may be embodied in various other forms. Furthermore, various omissions, substitutions, and modifications may be made in the forms of the methods and systems described herein. Those skilled in the art will recognize that in some configurations, the actual steps performed in the illustrated or disclosed processes may differ from the steps shown in the figures. Depending on the configuration, some of the steps described above may be omitted or other steps may be added. For example, the actual steps and / or the order of steps performed in the disclosed processes may differ from those shown in the figures. Depending on the configuration, some of the steps described above may be omitted or other steps may be added. For example, various components illustrated in the figures or disclosed herein may be implemented as software and / or firmware on a processor, controller, ASIC, FPGA, and / or dedicated hardware. The software or firmware may include instructions stored in non-temporary computer-readable memory. The instructions may be executed by a processor, controller, ASIC, FPGA, or dedicated hardware. Hardware components, such as controllers, processors, ASICs, FPGAs, and similar devices, may include logic circuits. Furthermore, the features and characteristics of the specific arrangements disclosed above can be combined in various ways to form additional arrangements, all of which will fall within the scope of this disclosure.

[0203] The user interface screens illustrated and described herein may include additional and / or alternative components. These components may include menus, lists, buttons, text boxes, labels, radio buttons, scroll bars, sliders, checkboxes, combo boxes, status bars, dialog boxes, windows, and the like. The user interface screens may also include additional and / or alternative information. The components may be arranged, grouped, and displayed in any preferred order.

[0204] In particular, conditional phrases such as “can,” “could,” “might,” “may,” and “for example” are generally intended to convey that a particular arrangement includes certain features, elements, and / or states, while other arrangements do not, unless otherwise specifically stated or understood within the context in which they are used. Therefore, such conditional phrases are not necessarily intended to suggest that features, elements, and / or states are required to some extent in one or more arrangements, or that logic for determining whether these features, elements, and / or states are included in any particular arrangement, or should be implemented in such arrangement, is necessarily included in one or more arrangements, with or without author input or instruction. Terms such as “include,” “contain,” and “have” are synonymous and are used inclusively and in an open-ended manner, not excluding additional elements, features, actions, behaviors, etc. Furthermore, the term "or" is used in an inclusive sense (rather than an exclusive sense), meaning, for example, when used to connect a list of elements, it means one, some, or all of the listed elements. In addition, the term "each," as used herein, may mean, in addition to its usual meaning, any subset of the set of elements to which the term "each" applies. Moreover, as used herein, "herein," "above," "below," and similar terms mean, as used in this application, the entire Specified Specified and not any particular part thereof.

[0205] Unless otherwise specified, combining language such as "at least one of X, Y, and Z" should be understood in contexts where it is generally used to convey that an item, term, etc., could be X, Y, Z, or any combination thereof. Therefore, such combining language is not generally intended to suggest that a particular arrangement must each contain at least one of X, at least one of Y, and at least one of Z.

[0206] As used herein, the terms “approximately,” “about,” “generally,” and “substantially” describe a value, quantity, or characteristic that approximates a given value, quantity, or characteristic that still performs the desired function or produces the desired result. For example, the terms “approximately,” “about,” “generally,” and “substantially” could refer to a quantity that is less than 10%, less than 5%, less than 1%, less than 0.1%, and less than 0.01% of a given quantity. In another embodiment, in a particular arrangement, the terms “approximately parallel” and “substantially parallel” could refer to a value, quantity, or characteristic that deviates by only 15 degrees, 10 degrees, 5 degrees, 3 degrees, 1 degree, or 0.1 degrees or less from being exactly parallel.

[0207] Unless otherwise explicitly stated, articles such as “a” or “an” should generally be interpreted as containing one or more listed items. Therefore, phrases such as “devices configured to perform the enumeration” are intended to contain one or more enumerated devices. Such one or more enumerated devices may also be collectively configured to perform the stated enumeration.

[0208] This disclosure includes specific configurations, examples, and uses, but it will be understood by those skilled in the art that the disclosure extends beyond the specifically disclosed configurations to other alternative configurations and / or uses, as well as obvious modifications thereof and their equivalents, including configurations that do not necessarily provide all of the features and advantages described herein. Accordingly, the scope of this disclosure is not intended to be limited by the specific disclosure of preferred configurations herein, but may be defined by the claims presented herein or thereafter.

[0209] [Additional note 1] A negative pressure wound therapy device, A negative pressure source including an inlet and an outlet, configured to provide negative pressure to a wound covered with a wound dressing via a fluid channel, and to draw fluid from the wound, A first noise reduction chamber, located in the fluid flow path downstream of the negative pressure source and in fluid communication with the outlet of the negative pressure source, the first noise reduction chamber, comprising an inlet and an outlet, is configured to reduce noise generated as a result of aspirating fluid from the wound and / or to reduce the level of pressure pulses in the fluid advancing through the negative pressure source. A second noise reduction chamber, located in the fluid flow path downstream of the negative pressure source and in fluid communication with the outlet of the first noise reduction chamber, the second noise reduction chamber, comprising an inlet and an outlet, is configured to reduce noise generated as a result of the aspiration of fluid from the wound and / or reduce the level of pressure pulses in the fluid advancing through the negative pressure source and the first noise reduction chamber. The second noise reduction chamber is spaced apart from the first noise reduction chamber. A negative pressure wound therapy device wherein the second noise reduction chamber is different from the first noise reduction chamber. [Additional note 2] The apparatus according to Appendix 1, wherein the first noise reduction chamber is configured to reduce noise generated by the negative pressure source and / or reduce the level of pressure pulses in the fluid advancing through the negative pressure source. [Additional note 3] The apparatus according to any one of appendices 1 to 2, further comprising a check valve positioned within the fluid flow path and configured to prevent the fluid from flowing in the reverse direction toward the negative pressure source. [Additional note 4] The apparatus according to Appendix 3, wherein the first noise reduction chamber is configured to reduce the level of pressure pulses in the fluid advancing through the negative pressure source in order to reduce the noise generated by the check valve. [Additional note 5] The apparatus according to any one of the appendices 3 to 4, wherein the first noise reduction chamber is located upstream of the check valve, and the second noise reduction chamber is located downstream of the check valve. [Additional note 6] The apparatus according to any one of the appendices 1 to 5, wherein the second noise reduction chamber is located in series with the first noise reduction chamber and downstream of the first noise reduction chamber. [Additional note 7] The apparatus according to Appendix 2, wherein the second noise reduction chamber is located closer to the exhaust of the apparatus than the first noise reduction chamber. [Additional note 8] The apparatus according to any one of the appendices 1 to 7, further comprising a foam located in at least one of the first and second noise reduction chambers. [Additional note 9] The apparatus according to any one of the appendices 1 to 8, wherein the first noise reduction chamber includes an inner wall that extends over a large portion of the distance between the first wall and the second wall of the first noise reduction chamber, positioned adjacent to the first wall or on the opposite side of the first wall, such that an opening is formed between the end of the inner wall and the second wall, and the first noise reduction chamber is configured to form a passage between the inlet and the outlet of the first noise reduction chamber, requiring the fluid passing through the first noise reduction chamber to pass through the opening formed between the end of the inner wall segment and the second wall. [Additional Note 10] The apparatus according to any one of the appendices 1 to 9, wherein the internal volumes of the first noise reduction chamber and the second noise reduction chamber are greater than the volume in the first conduit that is in fluid communication with the inlet of at least one of the first noise reduction chamber or the second noise reduction chamber, and greater than the volume in the second conduit that is in fluid communication with the outlet of at least one of the first noise reduction chamber or the second noise reduction chamber. [Additional Note 11] The apparatus according to any one of the appendices 1 to 10, further comprising a flow module including one or more pressure sensors and solenoid valves. [Additional Note 12] The apparatus according to any one of the appendices 1 to 11, wherein the negative pressure source includes a motor, and the apparatus further includes a power supply configured to supply power to the motor. [Additional Note 13] The apparatus according to any one of the appendices 1 to 12, comprising a canister connectable to the apparatus and configured to collect fluid aspirated from the wound as a result of negative pressure being supplied to the wound by the negative pressure source, and a cap connected to an opening on the canister. [Additional Note 14] The apparatus according to Appendix 13, further comprising a filter connected to or supported by the cap. [Additional Note 15] The apparatus according to Appendix 14, wherein the filter includes a carbon filter. [Additional Note 16] The apparatus according to any one of the appendices 13 to 15, further comprising a hydrophobic filter connected to or supported by the cap. [Additional Note 17] A negative pressure wound therapy system, A pump device including a negative pressure source configured to be fluidly connected to a wound covered with a wound dressing, A canister connectable to the pump device and configured to collect fluid aspirated from the wound as a result of negative pressure being supplied to the wound by the negative pressure source, A canister release mechanism comprising an actuator connected to the pump device and connected to one or more movable latches, wherein when the actuator is pressed, the canister release mechanism is configured to cause the pump device to disengage the canister from the pump device. A negative pressure wound therapy system in which one or more latches are configured to move between a first position in which the one or more latches secure the canister to the pump device and a second position in which the one or more latches release the canister from the pump device when the actuator is pressed. [Additional Note 18] The system according to Appendix 17, including a cap that can be connected to an opening on the canister. [Additional Note 19] The system according to any one of the appendices 18 to 19, comprising a filter positioned within or supported by the cap. [Additional Note 20] The system according to Appendix 19, wherein the cap includes a surface configured to overlap at least a portion of the filter so as to prevent the exudate in the canister from splashing onto at least a portion of the filter, and the shield overlaps at least 80% of the surface area of ​​the first main surface of the filter. [Additional Note 21] The system according to any one of the appendices 17 to 20, wherein one or more latches are configured to engage with a cap connected to the canister in the first position and to release the cap connected to the canister in the second position. [Additional Note 22] The system according to any one of the appendices 17 to 21, wherein the canister release mechanism is configured to release the canister from the pump device by pressing a single button. [Additional Note 23] The system according to Appendix 22, wherein the single button is supported by the outer surface of the housing of the pump device. [Additional note 24] The system according to any one of appendices 17 to 23, wherein the canister release mechanism is configured to release the canister from the pump device with one-handed operation only. [Additional note 25] The system according to any one of appendices 17 to 24, wherein the canister release mechanism includes a button, and the actuator is configured to move one or more latches from the first position to the second position when the button is pressed. [Additional note 26] The system according to Appendix 25, wherein the button is supported by the external surface of the housing of the device. [Additional note 27] The system according to any one of appendices 17 to 26, wherein the canister release mechanism is configured to move the canister away from the pump assembly when the canister release mechanism is activated. [Additional note 28] The system according to any one of appendices 17 to 27, wherein the canister release mechanism includes at least one projection configured to push the canister away from the pump device when the canister release mechanism is activated. [Additional note 29] The system according to any one of the appendices 17 to 28, wherein the pump device includes a power cord electrically connected to a panel that can be removed from the outside of the housing of the pump device without removing or opening the housing, so that the power cord can be replaced by replacing the panel that can be removed from the outside of the housing of the pump device. [Additional note 30] The system according to any one of appendices 17 to 29, wherein the user interface of the pump device is located on the upper surface of the pump device, which is oriented at an angle of no more than 35° to the horizontal plane. [Additional note 31] The system according to any one of the appendices 17 to 30, wherein the pump device has one or more tube supports that are removably connected to the housing of the pump device, the tubes of the pump device extend through enclosed openings of the one or more tube supports, and the one or more tube supports have at least one additional opening that can removably support the tubes. [Additional note 32] A negative pressure wound therapy system, A device including a negative pressure pump operated by a pump motor, a battery, a display, a lower core assembly, and an upper support within a housing, A canister that is connectable to the aforementioned device and configured to collect fluid aspirated from the wound as a result of negative pressure being supplied to the wound covered by the wound dressing by the negative pressure pump, The canister includes a cap connected to an opening, The lower core assembly is configured to receive and support at least the pump motor and the battery, The upper support is connected to the lower core assembly, and the upper support extends above the lower core assembly. The upper support is configured to receive and support at least the display of the pump assembly, A negative pressure wound therapy system in which the display can be removed from the pump assembly by removing the housing and removing the upper support from the pump assembly. [Appended Claim 33] The system according to appended claim 32, comprising a filter connected to or supported by the cap. [Appended Claim 34] The device according to appended claim 33, wherein the filter comprises a carbon filter. [Appended Claim 35] The system according to any one of appended claims 32 to 34, further comprising a hydrophobic filter connected to or supported by the cap. [Appended Claim 36] The system according to any one of appended claims 32 to 35, wherein the cap further comprises a shield configured to overlap at least a part of the filter so as to prevent exudate in the canister from splashing onto at least a part of the filter, and the shield overlaps at least 40% of the surface area of the first major surface of the filter. [Appended Claim 37] The system according to any one of appended claims 32 to 36, further comprising a canister release mechanism. [Appended Claim 38] The system according to any one of appended claims 32 to 37, wherein the canister release mechanism comprises one or more latches configured to move between a first position in which the one or more latches fix the canister to the device and a second position in which the one or more latches release the canister from the device. [Appended Claim 39] A kit comprising the device according to any one of appended claims 1 to 38 and a wound dressing. [Appended Claim 40] A method of operating any of the devices according to any one of appended claims 1 to 39. [Appended Claim 41] The devices, systems, and / or methods illustrated and / or described.

Claims

1. A negative pressure wound therapy system, A pump device including a negative pressure source configured to be fluidly connected to a wound covered with a wound dressing, A canister connectable to the pump device and configured to collect fluid aspirated from the wound as a result of negative pressure being supplied to the wound by the negative pressure source, A canister release mechanism comprising an actuator connected to the pump device and connected to one or more movable latches, wherein when the actuator is pressed, the canister release mechanism is configured to cause the pump device to disengage the canister from the pump device. A negative pressure wound therapy system in which one or more latches are configured to move between a first position in which the one or more latches secure the canister to the pump device and a second position in which the one or more latches release the canister from the pump device when the actuator is pressed.

2. The system according to claim 1, further comprising a cap connectable to an opening on the canister.

3. The system according to claim 1 or 2, comprising a filter positioned within or supported by the cap.

4. The system according to claim 3, wherein the cap includes a surface configured to overlap at least a portion of the filter so as to prevent the exudate in the canister from splashing onto at least a portion of the filter, and the shield overlaps at least 80% of the surface area of ​​the first main surface of the filter.

5. The system according to any one of claims 1 to 4, wherein one or more latches are configured to engage with a cap connected to the canister in the first position and to release the cap connected to the canister in the second position.

6. The system according to any one of claims 1 to 5, wherein the canister release mechanism is configured to release the canister from the pump device by simply pressing a single button.

7. The system according to claim 6, wherein the single button is supported by the outer surface of the housing of the pump device.

8. The system according to any one of claims 1 to 7, wherein the canister release mechanism is configured to release the canister from the pump device with one-handed operation only.

9. The system according to any one of claims 1 to 8, wherein the canister release mechanism includes a button, and the actuator is configured to move one or more latches from the first position to the second position when the button is pressed.

10. The system according to claim 9, wherein the button is supported by the outer surface of the housing of the device.

11. The system according to any one of claims 1 to 10, wherein the canister release mechanism is configured to move the canister away from the pump assembly when the canister release mechanism is activated.

12. The system according to any one of claims 1 to 11, wherein the canister release mechanism includes at least one projection configured to push the canister away from the pump device when the canister release mechanism is activated.

13. The system according to any one of claims 1 to 12, wherein the pump device includes a power cord electrically connected to a panel that can be removed from the outside of the housing of the pump device without removing or opening the housing, so that the power cord can be replaced by replacing the panel that can be removed from the outside of the housing of the pump device.

14. The system according to any one of claims 1 to 13, wherein the user interface of the pump device is located on the upper surface of the pump device, which is oriented at an angle of 35° or less to the horizontal plane.

15. The system according to any one of claims 1 to 14, wherein the pump device has one or more tube supports that are detachably connected to the housing of the pump device, the tubes of the pump device extend through enclosed openings of the one or more tube supports, and the one or more tube supports have at least one additional opening that can detachably support the tubes.

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