Pressure Detection System and Method

Abstract

The pressure detection system includes a body having an internal chamber with an input port and an output port, and an elastic membrane that fluidly seals the exposed opening of the chamber so that fluid passing through the chamber does not pass through the exposed opening. The membrane is configured to change shape in response to an increase in pressure caused by the fluid in the chamber meeting a predetermined threshold. In some implementations, the membrane includes or is part of an identification mechanism that moves outward away from the chamber as the pressure increases to indicate the pressure increase. In some implementations, the identification mechanism includes markings on the surface of the membrane, and an image sensing device reads the markings and provides an indication of the current pressure associated with the fluid in the chamber based on the change in the markings from a default state.

Description

Technical Field

[0001] The target technology relates to an inexpensive disposable device capable of detecting an alert to a user of an overpressure event.

Background Art

[0002] In a medical facility, the intravenous drip of a medical fluid to a patient is a commonly performed patient care operation. A fluid infusion device such as an infusion pump is usually configured to infuse a fluid from a fluid source into a patient through a vascular access device (VAD) such as a syringe or a catheter. When a blockage occurs between the pump and the VAD, the fluid may not reach the vascular system as intended, and blood may flow backward, resulting in the formation of blood clots and associated risks.

[0003] Before starting a fluid delivery session, usually, a caregiver sets the infusion device to alert the caregiver when the fluid pressure in the infusion line exceeds a pressure threshold, so that the caregiver can take corrective measures to avoid the possibility of harm to the patient. The latest infusion devices incorporate a pressure sensor for detecting pressure spikes in the infusion line. The current methods of setting the infusion device include setting the pressure limit by the caregiver. Some pumps have a preset value that can be adjusted by the caregiver, while others have a preset value that is fixed, and all have limited ranges. Some pumps are preset to obtain a value when powered on, and the caregiver may or may not be able to control the adjustment even if the obtained value exceeds the defined pressure value range.

[0004] Existing pressure detection mechanisms can detect pressure spikes based on blockages upstream or downstream of the drip device, but no method is known for detecting pressure fluctuations in gravity-based drips or drip lines close to the patient. It is important to avoid subjecting the patient's blood vessels and tissues to unnecessarily high pressures and to avoid false alarms due to excessive pressure caused by improper placement of the gravity-fed infusion bag or infusion via a Y-valve close to the patient. For example, with mechanical syringes, pressures in excess of 560 kPa (80 psi) can be introduced, putting both the product and the patient at risk of damage or injury.

Summary of the Invention

[0005] The subject technology provides an inexpensive disposable device that can be installed almost anywhere on the drip line and that can detect and alert the user to overpressure events by providing visual instructions to the user or a visually enabled system. The device further provides an overflow to reduce peak pressure.

[0006] According to various aspects of the subject technology, a pressure detection system includes a body including a chamber, an input port, and an output port, where the chamber has an opening exposed through a side of the body and is configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port and supply the fluid to a downstream portion of the drip line fluidly coupled to the output port; an elastic membrane that fluidly seals the exposed opening so that fluid does not pass through the exposed opening and is configured to change shape and expand in response to an increase in pressure caused by the fluid accumulated in the chamber; and an identification mechanism coupled to the elastic membrane and arranged to move outward away from the chamber as the pressure increases and the elastic membrane expands, where the distance the identification mechanism moves in response to the pressure increase indicates the pressure increase.

[0007] The method is to provide a main body including a chamber, an input port, and an output port, wherein the chamber has an opening exposed through a side surface of the main body, and accumulates fluid from an upstream portion of a drip line fluidly coupled to the input port, and is configured to supply the fluid to a downstream portion of a drip line fluidly connected to the output port; to fluidly seal the exposed opening so that fluid does not pass through the exposed opening, wherein the elastic membrane is configured to change its shape and expand in response to an increase in pressure caused by the fluid accumulated in the chamber; to couple an identification mechanism to the elastic membrane, wherein the identification mechanism is arranged to move outward away from the chamber as the pressure increases and the elastic membrane expands; and the distance that the identification mechanism moves in response to the pressure increase indicates the pressure increase.

[0008] According to various aspects of the subject technology, a pressure detection system is a main body including a chamber, an input port, and an output port, wherein the chamber has an opening exposed through a side surface of the main body, and accumulates fluid from an upstream portion of a drip line fluidly coupled to the input port, and is configured to supply the fluid to a downstream portion of a drip line fluidly connected to the output port; an elastic membrane that fluidly seals the exposed opening so that fluid does not pass through the exposed opening, and is configured to change its shape in response to a pressure caused by the fluid accumulated in the chamber satisfying a predetermined threshold, wherein the elastic membrane has one or more markings on a surface of the elastic membrane that deform when the elastic membrane changes its shape.

[0009] In some implementation forms, the pressure detection system further includes an image sensing device and one or more processors. The image sensing device is configured to read one or more markings on the surface of the elastic membrane, and based on the image sensing device reading the one or more markings, measure the current change of the one or more markings from their default state, and provide an indication of the current pressure associated with the fluid in the chamber based on the current change. Other aspects include corresponding systems and corresponding methods, devices, and computer program products for implementing the features thereof.

[0010] According to various aspects of the target technology, the method includes providing a body including a chamber, an input port, and an output port. The chamber has an opening exposed through the side of the body and is configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port and supply the fluid to a downstream portion of a drip line fluidly coupled to the output port. Fluidly sealing an elastic membrane to the exposed opening so that fluid does not pass through the exposed opening. The elastic membrane is configured to change shape in response to pressure caused by the fluid accumulated in the chamber satisfying a predetermined threshold. The elastic membrane has one or more markings on its surface that deform when the elastic membrane changes shape.

[0011] In some implementations, the method further comprises configuring an image sensing device to read one or more markings on the surface of the resilient membrane, and based on the image sensing device reading the one or more markings, configuring a processor to measure a current change from a default state of the one or more markings, and configuring a processor to provide an indication of a current pressure associated with a fluid within the chamber based on the current change. In some implementations, the method further comprises configuring a processor to determine that the current change of the one or more markings corresponds to the current pressure satisfying a predetermined threshold pressure, and configuring a processor to provide a notification regarding the current pressure satisfying a predetermined pressure threshold. Other aspects include corresponding methods and corresponding systems, apparatuses, and computer program products for implementing the features thereof.

[0012] It will be understood from the following detailed description which shows various configurations of the subject technology and is described by way of illustration that other configurations of the subject technology will be readily apparent to those of ordinary skill in the art. As will be recognized, the subject technology is capable of other different configurations and some details thereof can all be changed in various other respects without departing from the scope of the subject technology. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive.

[0013] To better understand the various implementations described, reference should be made to the following description of the implementations in conjunction with the following drawings. Like reference numerals refer to corresponding parts throughout the drawings and the description.

Brief Description of the Drawings

[0014]

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[0015] Next, reference is made to the implementation forms. Examples thereof are shown in the accompanying drawings. In the following description, many specific details are set forth in order to provide an understanding of the various implementation forms described. However, it will be apparent to those skilled in the art that the various implementation forms can be practiced without these specific details. In other instances, well-known methods, procedures, components, circuits, and networks have not been described in detail so as not to unnecessarily obscure aspects of the implementation forms.

[0016] The disclosed pressure detection and pressure notification system includes a fluid chamber sealed with an elastic membrane and a disposable unit installed in the fluid path of the drip solution. This unit can be attached to important facilities such as an image processing unit that communicates with the drip device and / or the notification server. Based on the pressure within the system, the elastic membrane on the device expands or collapses, and the membrane can include a printed pattern that changes its design as the membrane expands or collapses. This pattern can be detected by an image processing device to alert a clinician of pressure fluctuations or to control the drip pump (e.g., by automatically ending the drip in response to excessive pressure).

[0017] Figure 1 shows an exemplary gravity-based fluid delivery system according to various implementations of the target technology. This exemplary delivery system includes a fluid container 2 that holds fluid for intravenous (IV) drip and is held on an IV pole. According to various implementations, the fluid source is a malleable liquid container such as an IV bag or a blood product bag. The drip line 21 is connected to the malleable fluid container 2 and delivers the fluid to the patient. The drip line 21 may generally be a conventional IV drip type tube used in hospitals and medical environments and is made of any type of elastic tube suitable for dripping therapeutic fluids to the patient, such as polyvinyl chloride (PVC). The cannula 5 is attached to the distal end of the elastic IV tube for inserting into the patient's blood vessel or other site 22 to deliver the fluid to the patient.

[0018] For the administration of IV fluid, regardless of the container, it is necessary to suspend the fluid container 2 at a certain height above the patient or the drip pump, typically 0.5 to 1.0 meters. Next, the container 2 is connected directly to the patient or to the drip pump by the elastic tube 21. The administration may include a drip chamber (not shown). Relatively inexpensive tubes such as polyvinyl chloride (PVC) tubes or similar types of tubes can be used.

[0019] The flow can be brought about by either gravity pressure or positive pressure. The gravity pressure-based flow control system relies on gravity to flow the fluid. In this regard, when the fluid container is mounted above the delivery point, positive pressure is generated by gravity at the connection of the drip tube to the patient or the pump.

[0020] Some systems may include an "IV controller" that interfaces with an IV tube. The IV controller is a device that automatically controls the flow rate of fluid through the IV tube by squeezing the tube more or less using a clamping device to control the flow of the fluid flowing through it. The IV controller can respond, for example, to a control signal generated by a flow sensor attached to the drip chamber. The flow sensor senses the fluid drops falling into the drip chamber, and the flow rate is calculated based on counting the number of drops per unit time. If the calculated flow rate is greater than the desired flow rate, the controller adjusts the clamping device to lower the flow rate by squeezing the tube further. The advantages of gravity administration sets include their relative simplicity and low cost. As further described, a pressure detection device 50 may be included to sense and / or relieve the pressure in the drip line 21. In some implementations, a computing device 8 and / or a display may be attached to the IV pole to facilitate reading from the pressure detection device. For example, as shown in FIG. 5, the image sensing device may be configured to read the pressure from the pressure detection device and transmit the pressure information to the computing device 8 for interpretation by the user.

[0021] FIG. 2 shows an exemplary pump-driven fluid delivery system including a drip pump 10 being used in an intended environment according to various aspects of the subject technology. In the illustrated example, a fluid source 2 is fluidly connected and coupled to an upstream portion 16 of a fluid line 21. An elastic portion 18 of the fluid line is operably engaged and attached to a peristaltic pumping device 19 to, for example, push fluid through a downstream fluid line 20 to a patient's arm 22. A roller clamp 23 (e.g., configured to mechanically compress the line to block the flow) can be placed in the downstream fluid line 20 between the drip pump 10 and the patient's arm 22 via a cannula 5.

[0022] In some embodiments, the pressure detection device 50(a) can be connected to the drip line 21 downstream of the pump 10 (e.g., above or below the roller clamp 23). In some embodiments, the blood pressure detection device 50(b) can be coupled to the drip extension set 4 and / or inserted between the syringe 6 and the catheter 5. In the illustrated example (b), the pressure detection device 50 can be used to monitor the pressure of the drip provided by the syringe 6 via the extension set 4.

[0023] Figures 3A - 3D show a first exemplary pressure detection device according to various aspects of the target technology. As shown in the figures, the target technology may include components made of a rigid plastic body and an elastic membrane that can be inserted into a fluid path such as a drip line. When the pressure in the system rises, the elastic membrane stretches to relieve the pressure in the system. When the cause of the pressure increase is removed, the membrane returns to its normal state. For the purposes of the present disclosure, the elastic membrane can be a material responsive to pressure changes or forces applied thereto. Suitable materials can be from the family of elastomers. This material can return to or retract to its original shape when the net pressure applied thereto has decreased to zero or is minimal or negligible.

[0024] The illustrated example shows a pressure detection system 50 including a body 302 having a substantially hollow chamber 303 disposed between an input port 304 and an output port 306. The chamber 303 is configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port 304 and supply this fluid to a downstream portion of the drip line fluidly coupled to the output port 306. According to various embodiments, the chamber 303 can be in the form of a basin, with the input port and the output port being fluidly formed on the sides of this basin. An elastic membrane 308 covers the basin opening 310 and is fluidly sealed to the basin opening so that fluid does not flow out of or pass through the exposed opening.

[0025] The elastic membrane 308 is configured to change its shape in response to the pressure caused by the fluid accumulated in the chamber. As shown in the figure, the elastic membrane is configured to protrude away from the chamber in response to the pressure exceeding a pressure threshold. In this regard, according to various implementations, the elastic membrane 308 can have a predetermined thickness and shape configured to bend and deform in response to the pressure caused by the fluid accumulated in the chamber 302. In some implementations, the elastic membrane can be elastic to stretch and expand in response to an increase in pressure within the chamber 303. The elastic membrane can be flat at the base opening 310 as shown in FIG. 3B, and then, for example, as shown in FIGS. 3C and 3D, begin to expand beyond the plane of the base opening 310 when the pressure meets a predetermined pressure threshold. In some implementations, the base opening is circular, and the elastic membrane 308 expands convexly as shown in FIGS. 3C and 3D.

[0026] In some implementations, the elastic membrane can be bent and formed into one or more predetermined curvature states in response to the pressure within the chamber 302. In some implementations, the elastic membrane is flat until the pressure within the chamber meets a pressure threshold, and is configured to become a predetermined convex shape when the pressure within the chamber meets the threshold. In this regard, the elastic membrane can be flat in a default or normal state at a first predetermined pressure threshold, and then become convex in an expanded state in response to the pressure meeting a second predetermined pressure threshold.

[0027] According to some embodiments, the chamber 303 and the elastic membrane 308 are configured to operate together to reduce the pressure accumulation within the chamber 303 when switched to the inflated shape. The membrane can bend and / or expand to allow for pressure relief within the fluid system. The material and stiffness of the elastic membrane can be adjusted to change the pressure required to activate the relief action. Also, the size of the device can be adjusted to change the total amount of fluid contained in the operating state. In this regard, the device operates as a pressure relief valve, providing an overflow to reduce the generated peak pressure, while at the same time providing a visual indication to the user that an overpressure event has occurred (e.g., by the inflated shape).

[0028] In some embodiments, the elastic membrane 308 can expand in a way that prevents unauthorized opening. Thereby, the elastic membrane is made such that it does not return to its default shape after expanding to the inflated shape. For example, the elastic membrane 308 may be made of a material that stretches but does not return to its original shape, or it may be made of a synthetic or semi-synthetic material (e.g., a polymer-based material) that switches from a default shape (e.g., flat or concave) to the convex shape shown in FIGS. 3C and 3D. In some embodiments, as further described, the membrane 308 may have markings printed thereon indicating the degree of pressure that has occurred.

[0029] FIGS. 4A - 4D show a second exemplary pressure detection device 50 according to various aspects of the target technology. As shown in the figures, the target system can include a component made of a rigid plastic body 402 and an elastic membrane 404 that can be inserted into a fluid path such as an IV line. When the pressure within the system rises, the elastic membrane 404 stretches to relieve the pressure within the system. The elastic membrane 404 can be coated and / or printed with one or more markings 406 that are placed within the plastic body 402 and facilitate indicating the pressure within the device when the membrane 404 is in the inflated state.

[0030] According to the illustrated implementation form, the disclosed device includes an input port 410 and an output port 412, accumulates fluid from the upstream portion of the drip line fluidly coupled to the input port 410, and supplies this fluid to the downstream portion of the drip line fluidly coupled to the output port 412, and may include a chamber 408 configured to do so. The elastic membrane 404 fluidly seals the exposed opening 414 of the chamber 408 so that the fluid does not pass through the exposed opening 414. According to various implementation forms, the elastic membrane 404 is configured to expand and change its shape in response to the pressure caused by the fluid accumulated in the chamber 408.

[0031] As shown in FIGS. 4A-4D, the chamber can expand into a housing 416 having a diameter larger than that of the chamber, whereby the floor of the housing circumscribes the chamber opening, and the walls and floor of the housing form a well in which the elastic membrane 404 is disposed. As shown in the figure, the elastic membrane 404 can be fluidly sealed by a frame 418 that crosses along and / or conforms to the inside of the wall of the well. The frame can sandwich and restrict the membrane 404 between the floor and the frame and / or between the walls and / or the frame. In this way, as shown in FIG. 4C, the elastic membrane 404 can expand (420) within the well.

[0032] According to various implementations, the markings 406 on the surface of the elastic membrane 404 deform when the elastic membrane 404 changes shape. For example, as shown in FIG. 4A, the markings can include one or more lines printed on the membrane such that the markings are straight when the elastic membrane is in a default state (e.g., flat) and deform (e.g., curve) when the membrane is in an inflated state (e.g., convex). In this regard, an indication that the marking 406 is deformed can indicate a pressure change within the chamber. In some implementations, as shown in FIGS. 4B and 4D, the markings can deform into a pattern of curved lines depending on the amount of curvature of the elastic membrane (e.g., when it is convex). In this way, the magnitude or pattern of deformation formed by the curvature of the membrane as the membrane expands can be related to the pressure value. For example, the pattern is compared to a predetermined pattern each associated with a pressure value, and the current pressure within the chamber is determined based on indexing the pressure by the depicted pattern.

[0033] FIG. 5 shows an exemplary pressure detection system configured for use in connection with a second exemplary pressure detection device according to various aspects of the art. The illustrated system includes a pressure detection device 50 in combination with an image sensing device 502. The image sensing device 502 includes an image sensing instrument 504, such as a camera, capable of capturing an image for subsequent visual processing by a processor. The image sensing device 502 is positioned and arranged such that the image sensing instrument 504 of the device 502 is aligned with the markings of the elastic membrane of the pressure detection device 50.

[0034] In some embodiments, the image sensing device 502 includes a coupling mechanism 506 that couples to the housing of the pressure detection device 50 and aligns the image sensing instrument 504 with the marking. In the illustrated example, the coupling mechanism 506 is a circular rim that stays with the housing of the pressure detection device, thereby centering the marking at the center of the membrane with one or more lenses of the image sensing device centered within the circular rim. For convenience, the image sensing device 502 may include a pole fixture 508 for coupling the device 502 to the IV pole 4. In this regard, the system can be arranged such that the input port and the output port (as well as the drip line 21) are vertically aligned. In this way, the gravity acting on the fluid is likely to remain predictable, and the expansion induced by the pressure of the elastic membrane 404 and the resulting pattern more accurately correlate with a predetermined expected pressure value.

[0035] The image sensing device 502 includes, or can be coupled to, one or more processors. In the illustrated example, the device 502 includes an internal circuit board 510 having a small camera 512 and a microprocessor 514 that operates the camera 512 to sense the markings 406 on the elastic membrane 404. An LED array 516 for illuminating the markings for the camera 512 may be included. The internal circuit board 510 may further include a wireless circuit 516 (e.g., Bluetooth or RF communication circuit), or a wired interface 518 (e.g., USB communication interface) for communication with a remote computer system or an infusion device 10 operably coupled thereto. In some implementations, a serial interface 520 may be included for interfacing with external devices such as an external display or an alarm. In some implementations, an external computing device (e.g., a mobile device) can be operably connected to the device 502 via a wireless interface or a wired interface to control the operation of the device or collect data from the device. For example, the sensing device 502 and / or a server operably connected to the device 502 can notify a clinician about a rapid pressure increase in the infusion line (via a Bluetooth or Internet connection) via the clinician's mobile phone or device. In some implementations, various operations of the infusion device can be triggered by signals provided by the device 502 in response to sensing pressure within the device 50.

[0036] According to various implementation forms, the processor 514 of the device 502 (or, for example, a remotely connected processor) can be programmed to cause the image sensing device 502 to read the markings on the surface of the elastic membrane 404, and then, based on the markings 406, measure the current change of the membrane 404 from the default state. As described above, the markings 406 can include a plurality of straight lines when the elastic membrane 404 is flat. These lines can be deformed into a pattern of curved lines according to the amount of curvature of the elastic membrane when it is convex. The processor is programmed to detect the pattern of the curved lines, match it with one or more predetermined patterns, and determine the current pressure based on indexing the matched pattern having a predetermined pressure value.

[0037] According to some implementation forms, the processor may be further programmed to determine the inflation state of the elastic membrane based on the markings read from the surface of the elastic membrane. For example, the inflation state may include the amount of shape change of the membrane from the default state. The processor may be further programmed to determine the deviation of the pressure in the chamber from the baseline pressure based on the determined inflation state.

[0038] Figures 6A - 6E show a third exemplary pressure detection device 50 according to various aspects of the target technology. As shown in the figures, the target system may include a component made of a rigid body 602 and an elastic membrane 604. As described above, the body 602 includes an internal chamber 606, an input port 608, and an output port 610. The chamber is configured to accumulate fluid from the upstream portion of the drip line 21 fluidly coupled to the input port 608 and supply this fluid to the downstream portion of the drip line 21 fluidly connected to the output port 610. The elastic membrane 604 fluidly seals the exposed opening 612 of the chamber 606 so that fluid does not pass through the opening 612 together with the chamber 606. As described above, the elastic membrane 604 is made of a material (for example, an elastomeric material) configured to change its shape and expand in response to an increase in pressure due to the fluid accumulated in the chamber 606.

[0039] In the illustrated implementation form, the pressure detection device 50 includes an identification mechanism 614 coupled to the elastic membrane 604. According to various implementation forms, the identification mechanism 614 includes a main body 602 and a plunger arranged to protrude outward away from the chamber 606. According to the various implementation forms described herein, the plunger 614 may include or be in the form of a cylindrical, rectangular, or other oval appendage coupled to the surface of the membrane. A casing 616 surrounds at least a portion of the elastic membrane and is coupled to at least a portion of the main body 602. The casing 616 includes an aperture 618 at the position of the plunger 614, and as shown, the plunger passes through this aperture 618. In some implementation forms, the aperture may include a collar 620 surrounding a portion of the plunger 614.

[0040] In this regard, as the pressure in the chamber 606 increases and the elastic membrane 604 expands, the identification mechanism 614 is arranged to move outward away from the chamber 606 (626). As the pressure increases and the elastic membrane expands, the plunger moves to expand further beyond the aperture and the casing (and the collar). The distance that the plunger / identification mechanism moves in response to the pressure increase indicates the pressure increase.

[0041] The plunger 614 may include markings or indicators (e.g., physical etching) for indicating pressure readings. In the illustrated example, the plunger 614 includes values arranged in steps, which may be referenced with respect to the color 620 and / or the protective casing 616. In this regard, the end of the color / casing can identify the value / position on the plunger 614 when in the pressurized state. In this way, when the IV line 21 is being primed, a value indicating the initial static pressure (in the chamber) can be read from the stepped readings on the plunger 614. The clinician can mark the plunger with this value. In some implementations, the surface of the casing 626 may be suitable for markings, and an area 628 for marking the initial value of the plunger 614 may be provided on the surface. When the catheter begins to clog, static pressure accumulates and the elastic membrane 604 bulges, and the graduated plunger moves to show a new value relative to the color / casing. Next, this new value can be compared with the previous value to determine whether the line is clogged and the degree of clogging.

[0042] As shown in FIG. 6E, the pressure detection device 50 may include a bellows mechanism 622 operably coupled to the casing 616 and mechanically movable in a lateral direction 624 along the axis and / or length of the plunger 614 relative to the casing 616. In this regard, a portion of the plunger (e.g., the upper rim 624 of the plunger) can be used to identify the position on the plunger.

[0043] In some implementations, the casing 616 includes a threaded collar 620 (not shown) that includes an aperture 612. In this regard, the bellows mechanism 622 can be coupled to the casing 616 by screwing into the threads of the threaded collar 620. The bellows mechanism 622 can move mechanically by rotating (626) around the collar 620 following the threads of the threaded collar 620.

[0044] Figures 7A - 7C show a fourth exemplary pressure detection device 50 according to various aspects of the target technology. The illustrated implementation is similar to the implementation of Figures 6A - 6E and has additional features. The illustrated implementation includes a plunger housing 630 coupled to an outer portion 632 of the casing 616 so as to surround the plunger 614 and the aperture 612. In this regard, the housing 630 may replace the collar 620 and / or the bellows mechanism 622 of Figure 6. The housing 630 may be a separate component from the casing 616 or may be formed as part of the casing 616 (e.g., the casing and the housing may be a single component).

[0045] In the illustrated implementation, the plunger 614 is completely enclosed within the casing and the housing. The housing 630 includes an opening 634 that allows a portion of the plunger 614 within the housing to be visible to a user looking at the device 50. In this case, the plunger may include one or more identifiers disposed laterally thereon. These can be read through the opening to identify the pressure value. When a first identifier and a second identifier are disposed laterally on the plunger and the plunger is in a first position associated with a first pressure, the first identifier (e.g., green) can be made visible through the opening 634, and when the plunger is in a second position associated with a second pressure, the second identifier can be made visible through the opening.

[0046] In the illustrated example, the plunger is color-coded, with a first region associated with the safe pressure of plunger 614 color-coded green and a second region not associated with the safe pressure of the plunger color-coded red. For example, the opening is placed close to the casing (closer to the elastic membrane), and the lower part of the plunger closer to the casing and / or the membrane is colored green so that when the elastic membrane is in its default position (e.g., substantially flat), the green-colored portion of the plunger can be seen from the opening. The other part of the plunger (e.g., farther from the membrane and / or the casing) is colored red so that when the elastic membrane is in a position associated with a higher pressure (e.g., inflated), the red-colored portion of the plunger can be seen from the opening, alerting / warning the clinician of the possibility of a pressure abnormality such as a blockage.

[0047] In some implementations, similar to the implementation of FIG. 6E, the plunger housing 630 is operably coupled to the casing and can move mechanically in the lateral direction 624 along the length of the plunger with respect to the casing to change the position of the opening. For example, the end of the housing 630 near the portion 632 of the casing 616 that may include a threaded aperture for receiving the threaded portion of the housing can be threaded. In this regard, the housing 630 can rotate in either direction to move the opening 634 laterally. In this regard, when the pressure is stable (e.g., during a priming operation), the opening can be positioned so that the green portion (or other first identifier) of the plunger is visible from the opening (FIG. 7B). When a pressure abnormality occurs, the plunger moves such that the red portion (or other second identifier) of the plunger is visible from the opening (FIG. 7C), indicating the pressure abnormality.

[0048] FIG. 8 shows a fifth exemplary pressure detection device 50 according to various aspects of the target technology. The illustrated implementation is similar to the implementations of FIGS. 1-7 and has additional features. As described above, the main body 602 includes an internal chamber 606, an input port 608, and an output port 610. The chamber is configured to accumulate fluid from the upstream portion of the drip line 21 fluidly coupled to the input port 608 and supply this fluid to the downstream portion of the drip line 21 fluidly coupled to the output port 610. An elastic membrane (not shown in FIG. 8) fluidly seals the exposed opening (not shown) of the chamber 606 so that fluid does not pass through the opening together with the chamber 606.

[0049] In the illustrated example, the elastic membrane cooperates with a plate 802 coupled to the membrane to prevent the outflow of fluid within the chamber. Instead of the elastic membrane forming a diaphragm (e.g., as in FIGS. 3-7), the elastic membrane forms a bellows with the plate at the chamber opening (e.g., with the membrane clamped within the main body). The membrane is located within the chamber opening and expands when the pressure rises. As shown, the plate 802 is coupled to the membrane and is arranged parallel to the chamber. The plate 802 can be flat on the surface of the main body.

[0050] The membrane may be made of an elastomeric material coupled at all four ends of the chamber within the chamber. According to various implementations, the elastic membrane is fluidly sealed inside the chamber, and when the pressure rises, the elastic membrane expands and the plate moves in one direction away from the main body and the chamber (804) (e.g., all points move together simultaneously). The membrane may not be constrained at a certain distance from the ends within the chamber to allow stretching across the chamber while allowing retraction within the chamber. According to FIG. 8, the plate 802 (also known as a valve or bellows) moves horizontally / transversely when static pressure acts.

[0051] In some implementation forms, as described above, the elastic membrane covers the opening of the chamber, and the plate 802 is fixed (e.g., adhered) to a substantial portion of the elastic membrane. In some implementation forms, the elastic membrane and the plate together form a four-sided bellows, and each of the four sides is at least partially disposed within the chamber. In the illustrated example, the plate 802 is rectangular with flat sides, but other shapes such as oval or circular may also be used.

[0052] As shown in the figure, the main body 602 can have a rectangular structure with a square or rectangular cross-section including flattened sides. One side includes the flattened plate 802, and the other sides may also be substantially flattened. In some implementation forms, the pressure detection device 50 includes one or more transparent panels 806 coupled to one or more sides of the main body. Each panel 806a and 806b adjacent to the plate 802 can be parallel to the flattened side of the main body 602 and perpendicular to the plate 802. The transparent panel 806 on the side of the main body and perpendicular to the plate 802 may extend beyond the plate on the side of the main body. The plate moves beyond the side of the main body in response to a pressure increase. In this regard, the plate 802 can be seen through the transparent panel 806 as it moves due to the pressure with the chamber.

[0053] The plate 802 may include an indicator 1208 that can be seen through the panel 806. The panel 806a may include a transparent scale corresponding to the indicator on the plate 802. The distance that the end of the plate moves away from the body and the plate moves in response to the pressure increase can be seen through the transparent panel. Thus, as the panel moves (804), the indicator can be tracked along the scale. When the pressure is in a steady state (e.g., during a priming operation), the clinician can mark the initial reading of the scale. When there is a blockage in line 21 or there is a cause for an increase in static pressure, the plate moves outward (804). As the plate moves outward (804), the clinician can record the relative change in static pressure using the transparent scale. The indicator 1208 on the plate 802 aids in reading the pressure change from the scale. The indicator may be a marking at the end of the panel or, in some implementations, a protrusion (e.g., similar to a fingertip).

[0054] In some implementations, one or more of the panels can be removably coupled. In this regard, the clinician can mark the current position of the indicator on the panel with a pen, remove the panel 806a from the body 602, and later measure and view the range of movement.

[0055] FIG. 9 shows a first exemplary process for fabricating or otherwise providing a pressure detection system according to various aspects of the target technology. For purposes of explanation, various blocks of the exemplary process 900 are described herein with reference to FIGS. 1-8, as well as the components and processes described herein. In some implementations, one or more of the blocks may be implemented separately from other blocks or by one or more different processors or devices. Further, for purposes of explanation, the blocks of the exemplary process 900 are described as occurring sequentially, i.e., linearly. However, multiple blocks of the exemplary process 900 may occur in parallel. Also, the blocks of the exemplary process 900 need not be executed in the order shown, and one or more of the blocks of the exemplary process 900 may not be executed.

[0056] In the illustrated example, a body (e.g., bodies 302, 402, 602) is provided that includes an internal chamber (e.g., chambers 303, 408, 606), an input port (e.g., ports 304, 410, 608), and an output port (e.g., ports 306, 412, 610) (902). The chamber of the body is configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port and supply this fluid to a downstream portion of a drip line fluidly coupled to the output port.

[0057] An elastic membrane (e.g., membranes 308, 404, 604) fluidly seals an exposed opening of the chamber so that fluid does not pass through the exposed opening (e.g., such that the opening is no longer exposed) (904). According to various implementations, the elastic membrane is configured to change shape in response to pressure caused by fluid accumulated within the chamber. In the examples of FIGS. 3, 4, and 6, the elastic membrane functions as a dome over the exposed opening.

[0058] In some embodiments, the change in the shape of the membrane is stepwise and / or proportional to the pressure. In some embodiments, the change occurs in response to a pressure that meets a predetermined threshold. The elastic membrane can be configured to be flat when the current pressure meets a first predetermined pressure threshold and convex in response to the current pressure meeting a second predetermined pressure threshold. For example, when the fluid in the chamber is at the normal flow pressure of the drip line (e.g., under normal atmospheric conditions), the membrane can remain flat. When a negative pressure is introduced, the membrane may become concave within the chamber. Under positive pressure, the membrane may become convex and bulge away from the chamber.

[0059] In the example of FIG. 4, the elastic membrane 404 includes one or more markings 406 on the surface of the elastic membrane 404 that deform when the elastic membrane changes shape. Subsequently, the markings 406 can be used to determine the pressure within the chamber 408 based on the amount of deformation of the markings when the elastic membrane 404 changes shape or the pattern formed by the markings. For example, the markings include a plurality of straight lines when the elastic membrane 404 is flat, and these can deform into a pattern of curved lines according to the amount of curvature of the elastic membrane when it changes to a convex shape. In the examples of FIGS. 6 and 7, as described above, a plunger mechanism may be integrated with the elastic membrane.

[0060] In some embodiments, the elastic membrane can be fabricated to bend and deform in response to the pressure caused by the fluid accumulated within the chamber. The membrane is a synthetic or semi-synthetic material (e.g., a polymeric material) and can have elastic properties to deform. In some embodiments, the membrane can be a thin plastic or PVC and can take on a flat, concave, or convex form depending on the pressure within the chamber. The membrane can have a predetermined thickness and shape (e.g., circular or oval).

[0061] In some embodiments, the elastic membrane can be configured to be substantially flat when the pressure in the chamber meets a first predetermined pressure threshold and to become convex in response to the pressure meeting a second predetermined pressure threshold. Thus, the elastic membrane can be configured to protrude away from the chamber when the pressure is greater than the second predetermined pressure threshold, and this second predetermined pressure threshold is greater than or equal to the first predetermined pressure threshold.

[0062] According to various embodiments, the chamber can be in the form of a basin, with an input port and an output port fluidly formed on the side of the basin, and the elastic membrane covers the opening of the basin. The elastic membrane whose shape can be changed can include an elastic membrane configured to switch from a default shape to an inflated shape in response to the pressure meeting a predetermined pressure threshold. In this regard, the chamber and the elastic membrane can be configured to operate together to reduce the pressure in the chamber when switched to the inflated shape. For example, due to the elasticity of the membrane, the membrane expands outward, so the space created by the expansion is added to the internal volume of the chamber, thereby reducing the pressure. In some embodiments, the membrane is designed not to return to its default shape. For example, when the pressure drops after inflation, the membrane may not collapse (e.g., from convex in the case of plastic) or may become convex (e.g., in the presence of negative pressure).

[0063] According to various aspects, the device functions as a pressure detection valve. When excessive pressure is introduced into the drip line, the device detects the pressure by collecting fluid in a fluid chamber whose volume increases due to the expansion of an elastic membrane. The total volume of the chamber is determined by the size of the chamber restricted by the shape of the elastic membrane. Thus, pressure detection can be a function of the elasticity of the membrane and full expansion. Further, the device can be configured in various sizes according to the expected volume of an expected pressurized bolus (e.g., from a related drip system). Similarly, the device can be fabricated with different pressure capacities to accommodate different pressures. According to various implementations, the body can be fabricated, for example, by injection molded plastic, although in some implementations, the body may be fabricated entirely from an elastic membrane that expands when pressurized.

[0064] Advantages of the disclosed gas removal device include the ability to be mass formed and manufactured, thereby reducing costs while requiring little or no additional clinician training on site. Further, the device is configured to not change the priming volume (e.g., when replacing a tube length similar to the device length) and does not require an external power source for operation.

[0065] FIG. 10 shows an exemplary process for detecting a pressure abnormality using a pressure detection system according to various aspects of the art. For purposes of explanation, various blocks of the exemplary process 1000 are described herein with reference to FIGS. 1 - 5, as well as the components and processes described herein. In some implementations, one or more of the blocks may be implemented separately from other blocks or by one or more different processors or devices. Further, for purposes of explanation, the blocks of the exemplary process 1000 are described as occurring sequentially, i.e., linearly. However, multiple blocks of the exemplary process 1000 may occur in parallel. Also, the blocks of the exemplary process 1000 need not be executed in the order shown, and one or more of the blocks of the exemplary process 1000 may not be executed.

[0066] According to some embodiments, an image sensing device 502 (including the image sensing instrument 504) is provided in relation to the disclosed pressure reducing device 50 and is arranged to sense and / or read one or more markings 406 on the surface of the elastic membrane 404 (1002). A processor for operating the image sensing device 502 can be configured (e.g., by programming) to cause the sensing device 502 to read one or more markings on the surface of the elastic membrane 404 (1004). In this case, the processor for operating the image sensing device 502 can be configured (e.g., by programming) to cause the sensing device 502 to measure the current change of one or more markings from their default state based on the image sensing device reading the one or more markings (1006). The processor can further be configured to provide an indication of the current pressure associated with the fluid in the chamber based on the current change of the markings from the default state (1008).

[0067] For example, the markings 406 can include a pattern of lines that curve as the pressure increases and the membrane 404 expands. The processor can be configured to detect the current pattern of the curved lines, match them with one or more predetermined patterns (e.g., stored in a memory such as a database), and determine the current pressure based on indexing the matched pattern having a predetermined pressure value. In some embodiments, the processor can be configured to determine the expansion state of the elastic membrane 404 based on the deformation of the markings 406 resulting from the amount of shape change of the elastic membrane 404, and based on the determined expansion state, determine the deviation of the pressure in the chamber from the baseline pressure. In some embodiments, the processor can be configured to determine that the current change of the markings 406 corresponds to the current pressure in the chamber 408 satisfying a predetermined threshold pressure. In this regard, the indication provided can be a notification regarding the current pressure satisfying a predetermined pressure threshold.

[0068] In some implementations, the processor is communicatively coupled to the drip pump 10. In this regard, the processor can be configured to determine that the drip pump 10 has started dripping a fluid. For example, the processor can be configured to determine that the drip pump has started dripping based on the image sensing device 502 reading a predetermined change from the default state of the marking. When the drip is started, the processor can be configured to activate the image sensing device 502 to capture an image of one or more markings. Next, the processor compares the captured image with one or more predetermined patterns corresponding to the default inflated state and is configured to determine a threshold marking pattern for detecting overpressure in the drip line based on comparing the captured image with the one or more predetermined patterns. The threshold marking pattern can be determined, at least in part, by indexing a threshold pressure value based on the default inflated state and determining a marking pattern associated with the overpressure of the default inflated state. The processor is then configured to periodically monitor one or more markings for the threshold marking pattern using the image sensing device during the drip and provide an alert when the threshold marking pattern is detected.

[0069] In some implementations where the processor is communicatively coupled to the drip pump 10 and determines when the drip pump has started dripping a fluid, the processor determines that the current change in one or more markings corresponds to an overpressure associated with the dripping of the fluid and, in response to determining that the current change corresponds to an overpressure, is configured to (i) provide an alert indicating that the current pressure has exceeded a safe pressure and (ii) send a signal to the drip pump to end the drip. The signal can be a high / low binary signal or can be in the form of program instructions communicated to the drip device via the wireless connection 516 or the wired interface connection 518 or the serial connection 520. The drip device can receive the signal and respond to the signal to end the drip.

[0070] In some implementation forms, the processor is configured to determine that the drip pump has started priming the drip line and, in response to the pressure not meeting a predetermined pressure threshold, provide an alert indicating that the priming of the drip line is incomplete. In some implementation forms, the processor is configured to determine that the current change in one or more markings corresponds to the current pressure not meeting a predetermined threshold pressure and provide a notification regarding the current pressure not meeting the predetermined pressure threshold.

[0071] Many of the above Example 1000 and related programming and setting features are also implemented as a software process designated as a set of instructions recorded on a computer-readable storage medium (also referred to as a computer-readable medium) and may be automatically executed (e.g., without user intervention). When these instructions are executed by one or more processing units (e.g., one or more processors, cores of processors, or other processing units), they cause the processing units to perform the actions indicated by the instructions. Examples of computer-readable media include, but are not limited to, CD-ROMs, flash drives, RAM chips, hard drives, EPROMs, etc. Computer-readable media do not include carrier waves or electronic signals that pass wirelessly or through a wired connection.

[0072] The term "software" is meant to include, as appropriate, firmware that resides in read-only memory, or an application stored on magnetic storage, which can be read into memory for processing by a processor. Also, in some implementations, multiple software aspects of the subject disclosure can be implemented as subparts of a larger program while maintaining the separate software aspects of the subject disclosure. In some implementations, multiple software aspects can also be implemented as separate programs. Finally, any combination of separate programs that implement the software aspects described herein is within the scope of the subject disclosure. In some implementations, when a software program is installed to operate on one or more electronic systems, it defines one or more specific machine implementations that execute and perform the operations of that software program.

[0073] A computer program (also called a program, software, software application, script, or code) can be written in any form of programming language, including a compiled or interpreted language, a declarative or procedural language, and can be deployed in any form, as a stand-alone program or as a module, component, subroutine, object, or other unit suitable for use in a computing environment. A computer program can correspond to a file in a file system, but it need not. The program can be stored in a part of a file that holds other programs or data (e.g., one or more scripts stored in a document of a markup language), in a single file dedicated to the program, or in multiple coordinated files (e.g., files that hold one or more modules, sub-programs, or portions of code). A computer program can be executed on one computer or deployed to be executed on multiple computers located at one site or distributed across multiple sites and interconnected by a communication network.

[0074] FIG. 11 shows a second exemplary process for fabricating or otherwise providing a pressure detection device according to various aspects of the target technology. For purposes of explanation, in this specification, various blocks of the exemplary process 1100 are described with reference to FIGS. 1-8, as well as the components and processes described herein. In some implementations, one or more of the blocks may be implemented separately from other blocks or by one or more different processors or devices. Further, for purposes of explanation, the blocks of the exemplary process 1100 are described as occurring sequentially, i.e., linearly. However, multiple blocks of the exemplary process 1100 may occur in parallel. Also, the blocks of the exemplary process 1100 need not be executed in the order shown, and one or more of the blocks of the exemplary process 1100 need not be executed.

[0075] In the illustrated example, a body (e.g., body 302, 402, 602) including a chamber (e.g., chambers 303, 408, 606), an input port (e.g., ports 304, 410, 608), and an output port (e.g., ports 306, 412, 610) is fabricated (1102). The chamber is configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port and supply this fluid to a downstream portion of a drip line fluidly coupled to the output port. Elastic membranes 308, 404 fluidly seal the exposed openings of the chamber, thereby preventing fluid from passing through the exposed openings (1104). According to various implementations, the elastic membrane is configured to change shape in response to pressure caused by the fluid accumulated in the chamber.

[0076] An identification mechanism is coupled to the elastic membrane and is arranged to move outward away from the chamber as the pressure increases and the elastic membrane expands, for example (1106). In this regard, the distance by which the identification mechanism moves in response to the pressure increase indicates the pressure increase.

[0077] According to various implementation forms, the identification mechanism includes a plunger 614 that is coupled to the elastic membrane and is arranged to protrude outward away from the chamber. As described above, a casing 616 that surrounds at least a part of the elastic membrane 604 can be coupled to at least a part of the main body. The casing may have an aperture 612 at the position of the plunger so that the plunger can pass through the aperture. In this regard, as the pressure rises and the elastic membrane expands, the plunger 614 moves with the elastic membrane such that the plunger extends further beyond the aperture and the casing.

[0078] In some implementation forms, referring to FIG. 6E, the pressure detection device 50 includes a bellows mechanism 622 operably coupled to the casing, and the bellows mechanism can move mechanically in the lateral direction 624 along the length of the plunger 614 with respect to the casing so as to identify the position of the plunger 614 at a part (for example, the surface) of the bellows mechanism. This bellows mechanism 622 can be implemented as a circular dial screwed into the threaded collar 620 of the casing 616. The threaded collar may include an aperture 612. In this regard, the bellows mechanism 622 can move mechanically by rotating (626) around the collar according to the thread of the threaded collar.

[0079] In some implementation forms, referring to FIGS. 7A, 7B, and 7C, the pressure detection device 50 may include a plunger housing 630 coupled to the outer portion of the casing 616 so as to surround the plunger and the aperture. The housing 630 can include one or more openings 634 to make a part of the plunger surrounded within the housing visible. In an implementation form where the casing and / or the main body is circular, the housing can also be circular with a diameter substantially smaller than the diameter of the casing and / or the main body. In the example shown in FIG. 7A, the diameter of the housing 630 is about half of the diameter of the casing 616.

[0080] The plunger may include a first identifier and a second identifier disposed laterally on the plunger, one of which can always be seen from the opening 634 according to the pressure in the pressure detection device 50. In some implementations, the identifiers are color-coded. For example, the plunger 614 can be color-coded green and red. The first identifier (e.g., green) can be seen from the opening 634 when the plunger is in a first position associated with a first pressure (e.g., a stable pressure), and the second identifier (e.g., red) can be seen from the opening 634 when the plunger 614 is in a second position associated with a second pressure (e.g., an abnormal state of high pressure).

[0081] In some implementations, the plunger housing is adjustable to calibrate (e.g., zero out) the pressure reading. In this regard, the housing 630 can be operably coupled to the casing by a threaded connection. In this way, the housing 630 can be mechanically moved laterally along the length of the plunger relative to the casing, such as to change the position of the opening. While the pressure is in an initial or default state, the housing can be adjusted laterally along the length of the plunger until the first identifier associated with the default state is visible from the opening.

[0082] In some implementations, as shown in FIG. 8, the identification mechanism includes a plate coupled to the elastic membrane. The plate 802 is disposed parallel to the opening of the chamber, and one side of the elastic membrane seals the inner periphery of the inside of the chamber, and the other side seals the plate, so that the chamber can be fluidly sealed. When the pressure in the chamber rises, the elastic membrane expands and / or stretches, and the plate moves away from the main body 602 and the chamber 608 in one direction (804).

[0083] The body 602 can include a rectangular structure having at least one flat side. The side on which the plate 802 is placed when in the default state can also be flat. In the example shown in FIG. 8, there are four flat sides. In some implementations, the pressure detection device 50 includes one or more transparent panels removably coupled to the body. The transparent panel 806 can abut against a flat side that is parallel to the flat side and perpendicular to the plate. In this regard, as shown in FIG. 8, the movement of the end of the plate away from the body and the distance the plate moves in response to a pressure increase can be seen through the transparent panel.

[0084] It is understood that the specific order or hierarchy of steps in the disclosed process is an illustration of an exemplary approach. Based on design preferences, it is understood that the specific order or hierarchy of steps within a process can be rearranged. Some of the steps can be executed simultaneously. The accompanying method claims present elements of various steps in a sample order and are not intended to be limited to the specific order or hierarchy presented.

[0085] FIG. 12 is a conceptual diagram showing an exemplary electronic system 1200 for facilitating pressure sensing in a pressure detection system according to an aspect of the target technology. The electronic system 1200 can be a computing device for the execution of software related to one or more parts or steps of process 1200, or the computing device 8, the processor 514, the computing hardware within the drip device 10, or a remotely connected device (e.g., a mobile device), including but not limited to these, and related to the components and processes provided by FIGS. 1-11. The electronic system 1200 can be representative in conjunction with the disclosure regarding FIGS. 1-7. In this regard, the electronic system 1200 can be a personal computer or mobile device such as a smartphone, a tablet computer, a laptop, a PDA, an augmented reality device, a wearable (such as a watch, a band, or glasses), or a combination thereof, another touch screen or TV with one or more embedded or coupled processors, or any other type of computer-related electronic device having network connectivity.

[0086] The electronic system 1200 can include various types of computer-readable media and interfaces to various other types of computer-readable media. In the illustrated example, the electronic system 1200 includes a bus 1208, a processing unit 1212, a system memory 1204, a read-only memory (ROM) 1210, a permanent storage device 1202, an input device interface 1214, an output device interface 1206, and one or more network interfaces 1216. In some implementations, the electronic system 1200 may include or be integrated with other computing devices or circuits for the operation or processes of the various components described above.

[0087] Bus 1208 collectively represents any system bus, peripheral bus, and chipset bus that communicatively connects a number of internal devices of the electronic system 1200. For example, bus 1208 communicatively connects the processing unit 1212 to the ROM 1210, the system memory 1204, and the permanent storage device 1202.

[0088] From these various memory units, the processing unit 1212 obtains the execution instructions and the data to be processed in order to execute the process of the target disclosure. The processing unit may be a single processor or a multi-core processor in different implementation forms.

[0089] The ROM 1210 stores the static data and instructions necessary for the processing unit 1212 and other modules of the electronic system. On the other hand, the permanent storage device 1202 is a read-write memory device. This device is a non-volatile memory unit that stores instructions and data even when the electronic system 1200 is off. Among the implementation forms of the target disclosure, there are those that use a mass storage device (such as a magnetic disk or an optical disk and the corresponding disk drive, etc.) as the permanent storage device 1202.

[0090] In other embodiments, a removable storage device (such as a floppy (registered trademark) disk, a flash drive, and a corresponding disk drive) is used as the permanent storage device 1202. Similar to the permanent storage device 1202, the system memory 1204 is a read / write memory device. However, unlike the storage device 1202, the system memory 1204 is a volatile read / write memory such as a random access memory. The system memory 1204 stores some of the instructions and data required by the processor during execution. In some embodiments, the process of the subject disclosure is stored in the system memory 1204, the permanent storage device 1202, and / or the ROM 1210. From these various memory units, the processing unit 1212 obtains the execution instructions and the data to be processed in order to execute the process in some embodiments.

[0091] Also, the bus 1208 is also connected to the input device interface 1214 and the output device interface 1206. Through the input device interface 1214, the user can communicate information and selection commands to the electronic system. Input devices used in the input device interface 1214 include, for example, an alphanumeric keyboard and a pointing device (also referred to as a "cursor control device"). Through the output device interface 1206, for example, an image generated by the electronic system 1200 can be displayed. Output devices used in the output device interface 1206 include, for example, a printer and a display device such as a cathode ray tube (CRT) or a liquid crystal display (LCD). Some embodiments include devices such as a touch screen that function as both an input device and an output device.

[0092] Also, as shown in FIG. 12, bus 1208 also connects electronic system 1200 to a network (not shown) via network interface 1216. Network interface 1216 may include, for example, a wireless access point (e.g., Bluetooth or WiFi) or a wireless circuit for connecting to a wireless access point. Network interface 1216 may also include hardware (e.g., Ethernet (registered trademark) hardware) for connecting a computer to a network such as a local area network (LAN), wide area network (WAN), wireless LAN, or intranet, or the Internet, or a portion of a network of networks. Any or all of the components of electronic system 1200 can be used in conjunction with the subject disclosure.

[0093] The above functions can be implemented in computer software, firmware, or hardware. This technique can be implemented using one or more computer program products. Programmable processors and computers can be included in a mobile device or packaged as a mobile device. Processes and logical flows can be executed by one or more programmable processors and also by one or more programmable logic circuits. General purpose and special purpose computing devices and storage devices can be interconnected via a communication network.

[0094] Some implementation forms include electronic components such as a microprocessor, storage, and memory, and save the instructions of a computer program on a machine-readable or computer-readable medium (also referred to as a computer-readable storage medium, machine-readable medium, or machine-readable storage medium). Some examples of such computer-readable media include RAM, ROM, read-only compact disc (CD-ROM), recordable compact disc (CD-R), rewritable compact disc (CD-RW), read-only digital versatile disc (e.g., DVD-ROM, dual-layer DVD-ROM), various recordable / rewritable DVDs (e.g., DVD-RAM, DVD-RW, DVD+RW, etc.), flash memory (e.g., SD card, mini SD card, micro SD card, etc.), magnetic and / or solid-state hard drives, read-only and recordable Blu-Ray (registered trademark) discs, ultra-dense optical discs, any other optical or magnetic medium, and floppy (registered trademark) discs. A computer-readable medium can store a computer program executable by at least one processing unit and includes a set of instructions for performing various operations. Examples of computer programs or computer code include files containing machine code such as that generated by a compiler and high-level code executed by a microprocessor using a computer, electronic component, or interpreter.

[0095] The foregoing description refers primarily to microprocessors and multi-core processors that execute software, although some implementations are performed by one or more integrated circuits such as application specific integrated circuits (ASICs) or field programmable gate arrays (FPGAs). In some implementations, such integrated circuits execute instructions stored within the circuit itself.

[0096] As used in this specification and the claims of this application, the terms "computer", "server", "processor", and "memory" all refer to electronic devices or other technological devices. These terms exclude humans and groups of humans. For the purposes of this specification, the term "displaying" or "displayed" means display on an electronic device. As used in this specification and the claims of this application, the terms "computer readable medium" and "computer readable media" are entirely limited to tangible physical objects that store information in a form readable by a computer. These terms exclude wireless signals, wired downloaded signals, and any other transient signals.

[0097] To provide for interaction with a user, implementations of the subject matter described in this specification can be realized on a computer having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or trackball) that enables the user to provide input to the computer. Other types of devices can be used to provide for interaction with the user. For example, feedback provided to the user can be any form of sensory feedback, such as visual feedback, auditory feedback, or tactile feedback, and input received from the user can be in any form, including acoustic input, voice input, or tactile input. Further, the computer can interact with the user by sending and receiving documents to and from the devices the user uses, such as, for example, by sending a web page to a web browser on the user's client device in response to a request received from the web browser.

[0098] Implementations of the subject matter described in this specification can be implemented in a computing system that includes back-end components (e.g., as a data server), middleware components (e.g., an application server), or front-end components (e.g., a client computer having a graphical user interface or a web browser that enables the user to interact with implementations of the subject matter described in this specification), or in a combination of one or more such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication, such as a communication network. Examples of communication networks include local area networks ("LANs") and wide area networks ("WANs"), the Internet (such as the Internet), and peer-to-peer networks (such as ad hoc peer-to-peer networks).

[0099] A computing system can include a client and a server. The client and the server are generally located at separate locations and can interact via a communication network. The relationship between the client and the server is created by computer programs that operate on their respective computers and have a client-server relationship with each other. In some implementations, the server sends data (e.g., HTML pages) to the client device (e.g., to display the data to a user interacting with the client device or to receive user input from the user). Data generated on the client device (e.g., as a result of the interaction with the user) can be received at the server from the client device.

[0100] One of ordinary skill in the art will appreciate that the various illustrative blocks, modules, elements, components, methods, and algorithms described herein can be implemented as electronic hardware, computer software, or a combination of both. To illustrate this interchangeability of hardware and software, various illustrative blocks, modules, elements, components, methods, and algorithms have been described generally in terms of their functionality. Such functionality can be implemented as hardware or software depending upon the particular application and design constraints imposed on the overall system. The described functionality can be implemented in various ways for each particular application. All of the various components and blocks can be arranged differently (e.g., arranged in a different order or partitioned differently) without departing from the scope of the claimed technology.

[0101] It is understood that the specific order or hierarchy of steps in the disclosed process is an illustration of an exemplary approach. Based on design preferences, it is understood that the specific order or hierarchy of steps within a process can be rearranged. Some of the steps can be performed simultaneously. The appended method claims present elements of the various steps in a sample order and are not intended to be limited to the specific order or hierarchy presented.

[0102] Exemplification of the target technology as a clause:

[0103] Various examples of aspects of the present disclosure are described, for convenience, as numbered clauses (such as 1, 2, 3, etc.). These are provided as examples and do not limit the target technology. The identification of figures and reference numerals is provided hereinafter only as an example and for illustration, and the clauses are not limited to these identifications.

[0104] Clause 1. A main body including a chamber, an input port, and an output port, wherein the chamber has an opening exposed through a side surface of the main body, and accumulates fluid from an upstream portion of a drip line fluidly coupled to the input port and supplies the fluid to a downstream portion of a drip line fluidly coupled to the output port; an elastic membrane that fluidly seals the exposed opening so that fluid does not pass through the exposed opening and is configured to change its shape in response to an increase in pressure caused by the fluid accumulated in the chamber and expand; an identification mechanism coupled to the elastic membrane and arranged to move outward away from the chamber as the pressure increases and the elastic membrane expands, wherein the distance by which the identification mechanism moves in response to the increase in pressure indicates the increase in pressure, a pressure detection system.

[0105] Clause 2. The identification mechanism includes a plunger coupled to the elastic membrane and arranged to protrude outward away from the chamber, and the pressure detection system further includes a casing that surrounds at least a part of the elastic membrane and is coupled to at least a part of the main body, the casing having an aperture at the position of the plunger and through which the plunger passes, and the pressure detection system is configured such that as the pressure increases and the elastic membrane expands, the plunger moves to extend further beyond the aperture and the casing, the pressure detection system according to Clause 1.

[0106] Item 3. A draft mechanism operably coupled to the casing, the draft mechanism further comprising a draft mechanism that can be mechanically moved laterally along the length of the plunger with respect to the casing so as to identify the position of the plunger as part of the draft mechanism, the pressure detection system according to Item 2.

[0107] Item 4. The casing includes a threaded collar, the threaded collar has an aperture, the draft mechanism is coupled to the casing by being screwed into the thread of the threaded collar, and the draft mechanism can be mechanically moved by rotating around the threaded collar according to the thread of the threaded collar, the pressure detection system according to Item 3.

[0108] Item 5. The pressure detection system according to Item 2 further includes a plunger housing coupled to an outer portion of the casing so as to surround the plunger and the aperture, the plunger includes a first identifier and a second identifier disposed laterally on the plunger, and the plunger housing has an opening at a position on the plunger housing so that the first identifier is visible when the plunger is in a first position associated with a first pressure and the second identifier is visible when the plunger is in a second position associated with a second pressure.

[0109] Item 6. The pressure detection system according to Item 5, wherein the plunger housing is operably coupled to the casing and can be mechanically moved laterally along the length of the plunger with respect to the casing so as to change the position of the opening.

[0110] Item 7. The identification mechanism includes a plate coupled to the elastic membrane and disposed parallel to the chamber, the elastic membrane fluidly seals the inside of the chamber, and as the pressure increases and the elastic membrane expands, the plate moves in one direction away from the body and the chamber, the pressure detection system according to Item 1.

[0111] Item 8. The body has a rectangular structure with at least one flat side, and the pressure detection system further comprises a transparent panel removably coupled to the body so as to be parallel to at least one flat side and perpendicular to the plate. The movement of the end of the plate from the body and the distance the plate moves in response to a pressure increase can be viewed through the transparent panel. The pressure detection system according to Item 7.

[0112] Item 9. The plate is rectangular, and the elastic membrane forms a four-sided bellows, with each of the four sides at least partially disposed within the chamber. The pressure detection system according to Item 8.

[0113] Item 10. To provide a body including a chamber, an input port, and an output port, the chamber having an opening exposed through a side of the body and configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port and supply the fluid to a downstream portion of a drip line fluidly coupled to the output port; to fluidly seal the exposed opening with an elastic membrane so that fluid does not pass through the exposed opening, the elastic membrane being configured to change shape and expand in response to an increase in pressure caused by the fluid accumulated within the chamber; to couple an identification mechanism to the elastic membrane, the identification mechanism being arranged to move outward away from the chamber as the pressure increases and the elastic membrane expands; including, the distance the identification mechanism moves in response to a pressure increase indicating the pressure increase.

[0114] Item 11. A main body including a chamber, an input port, and an output port, wherein the chamber has an opening exposed through a side surface of the main body, accumulates fluid from an upstream portion of a drip line fluidly coupled to the input port, and is configured to supply the fluid to a downstream portion of a drip line fluidly connected to the output port; an elastic membrane that fluidly seals the exposed opening so that fluid does not pass through the exposed opening, and is configured to change its shape in response to a pressure caused by the fluid accumulated in the chamber satisfying a predetermined threshold, and has one or more markings on the surface of the elastic membrane that deform when the elastic membrane changes its shape; and a pressure detection system comprising the elastic membrane.

[0115] Item 12. The pressure detection system according to Item 11, further comprising an image sensing device and one or more processors configured to cause the image sensing device to read one or more markings on the surface of the elastic membrane, measure a current change of the one or more markings from a default state based on the image sensing device reading the one or more markings, and provide an indication of a current pressure associated with the fluid in the chamber based on the current change.

[0116] Item 13. The pressure detection system according to Item 12, wherein the one or more processors are further configured to determine that the current change of the one or more markings corresponds to the current pressure satisfying a predetermined threshold pressure, and provide a notification regarding the current pressure satisfying the predetermined pressure threshold.

[0117] Item 14. Further comprising an infusion pump, the one or more processors are further configured to determine that the infusion pump has initiated a drip of fluid, and upon initiation of the drip, activate an image sensing device to capture an image of one or more markings, compare the captured image with one or more predetermined patterns corresponding to a default inflated state, determine a threshold marking pattern for detecting overpressure in the drip line based on comparing the captured image with the one or more predetermined patterns, periodically monitor one or more markings for the threshold marking pattern using the image sensing device during the drip, and upon detecting the threshold marking pattern, be configured to provide an alert, the pressure detection system according to Item 12.

[0118] Item 15. Further comprising an infusion pump, the one or more processors are further configured to determine that the infusion pump has initiated a drip of fluid, determine that a current change in one or more markings corresponds to an overpressure associated with the drip of fluid, and in response to determining that the current change corresponds to an overpressure, (i) be configured to provide an alert indicating that the current pressure has exceeded a safe pressure, and (ii) send a signal to the infusion pump to terminate the drip, and the drip terminates in response to the signal, the pressure detection system according to Item 12.

[0119] Item 16. The one or more processors are configured to determine that the infusion pump has initiated a drip of fluid based on the image sensing device reading a first change from a default state of one or more markings, the pressure detection system according to Item 15.

[0120] Item 17. The one or more processors are further configured to determine that a current change in one or more markings corresponds to the current pressure not meeting a predetermined threshold pressure, and be configured to provide a notification regarding the current pressure not meeting the predetermined pressure threshold, the pressure detection system according to Item 12.

[0121] Item 18. The pressure detection system according to item 15, further comprising an infusion pump, wherein one or more processors are further configured to determine that the infusion pump has started priming the infusion line and provide an alert indicating that the priming of the infusion line is incomplete in response to the pressure not meeting a predetermined pressure threshold.

[0122] Item 19. The elastic membrane is configured to be flat when the current pressure meets a first predetermined pressure threshold and convex in response to the current pressure meeting a second predetermined pressure threshold. One or more markings include a plurality of straight lines when the elastic membrane is flat, and these are deformed into a pattern of curved lines according to the amount of curvature of the elastic membrane when it is convex. One or more processors are configured to detect the pattern of the curved lines, match them with one or more predetermined patterns, and determine the current pressure based on indexing the matched pattern having a predetermined pressure value. The pressure detection system according to item 12.

[0123] Item 20. One or more processors are further configured to determine the expansion state of the elastic membrane based on markings read from the surface of the elastic membrane, the expansion state including the amount of shape change, and to determine the deviation of the pressure in the chamber from the baseline pressure based on the determined expansion state. The pressure detection system according to item 12.

[0124] Item 21. To provide a main body including a chamber, an input port, and an output port, wherein the chamber has an opening exposed through a side surface of the main body, and accumulates fluid from an upstream portion of a drip line fluidly coupled to the input port, and is configured to supply the fluid to a downstream portion of a drip line fluidly connected to the output port; to fluidly seal an elastic membrane to the exposed opening of the chamber so that fluid does not pass through the exposed opening, wherein the elastic membrane is configured to change its shape in response to a pressure caused by the fluid accumulated in the chamber satisfying a predetermined threshold; and the elastic membrane has one or more markings on its surface that deform when the elastic membrane changes its shape. A method of providing a pressure detection system including these steps.

[0125] Item 22. Configuring an image sensing device to read one or more markings on the surface of the elastic membrane; configuring a processor to measure a current change of the one or more markings from their default state based on the image sensing device reading the one or more markings; and configuring the processor to provide an indication of the current pressure associated with the fluid in the chamber based on the current change. The method according to Item 21, further including these steps.

[0126] Item 23. Configuring a processor to determine that the current change of the one or more markings corresponds to the current pressure satisfying a predetermined threshold pressure; and configuring the processor to provide a notification regarding the current pressure satisfying a predetermined pressure threshold. The method according to Item 22, further including these steps.

[0127] The method according to claim 22, further comprising: configuring a processor to determine that the drip pump has initiated a drip of fluid; configuring the processor to operate an image sensing device to capture an image of one or more markings when the drip is initiated; configuring the processor to compare the captured image with one or more predetermined patterns corresponding to a default inflated state; configuring the processor to determine a threshold marking pattern for detecting overpressure in the drip line based on comparing the captured image with the one or more predetermined patterns; configuring the processor to periodically monitor one or more markings for the threshold marking pattern using the image sensing device during the drip; and configuring the processor to provide an alert when the threshold marking pattern is detected.

[0128] The method according to claim 22, further comprising: configuring a processor to determine that the drip pump has initiated a drip of fluid; configuring the processor to determine that a current change in one or more markings corresponds to overpressure associated with the drip of fluid; in response to determining that the current change corresponds to overpressure, (i) configuring the processor to provide an alert indicating that the current pressure has exceeded a safe pressure, and (ii) configuring the processor to send a signal to end the drip to the drip pump, wherein the drip ends in response to the signal.

[0129] The method according to claim 25, further comprising: configuring a processor to determine that the drip pump has initiated a drip of fluid based on the image sensing device reading a first change from a default state of one or more markings.

[0130] The method according to claim 22, further comprising configuring the processor to determine that the current change in one or more markings corresponds to the current pressure not satisfying a predetermined threshold pressure, and configuring the processor to provide a notification regarding the current pressure not satisfying a predetermined pressure threshold.

[0131] The method according to claim 25, further comprising configuring the processor to determine that the drip pump has started priming the drip line, and configuring the processor to provide an alert indicating that the priming of the drip line is incomplete in response to the pressure not satisfying a predetermined pressure threshold.

[0132] The method according to claim 22, wherein the elastic membrane is configured to be flat when the current pressure satisfies a first predetermined pressure threshold and to be convex in response to the current pressure satisfying a second predetermined pressure threshold, one or more markings include a plurality of straight lines when the elastic membrane is flat and deform into a pattern of curved lines according to the amount of curvature of the elastic membrane when it is convex, the process further comprising configuring the processor to detect the pattern of curved lines and match it with one or more predetermined patterns, and configuring the processor to determine the current pressure based on indexing the matched pattern having a predetermined pressure value.

[0133] The method according to claim 22, further comprising configuring the processor to determine the expansion state of the elastic membrane based on markings read from the surface of the elastic membrane, the expansion state including the amount of shape change, and configuring the processor to determine the deviation of the pressure in the chamber from the baseline pressure based on the determined expansion state.

[0134] Item 31. A main body including a chamber, an input port, and an output port, wherein the chamber is configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port and supply the fluid to a downstream portion of the drip line fluidly connected to the output port; and an elastic membrane that fluidly seals the exposed opening of the chamber so that fluid does not pass through the exposed opening. The elastic membrane is configured to change its shape in response to the pressure caused by the fluid accumulated in the chamber. A pressure relief system.

[0135] Item 32. The pressure relief system according to Item 31, wherein the elastic membrane has a predetermined thickness and shape configured to bend and deform in response to the pressure caused by the fluid accumulated in the chamber.

[0136] Item 33. The pressure relief system according to Item 32, wherein the elastic membrane is configured to be flat when the current pressure satisfies a first predetermined pressure threshold and convex in response to the current pressure satisfying a second predetermined pressure threshold.

[0137] Item 34. The pressure relief system according to Item 33, wherein the elastic membrane is configured to protrude away from the chamber in response to the pressure becoming greater than a second predetermined pressure threshold, and the second predetermined pressure threshold is equal to or greater than the first predetermined pressure threshold.

[0138] Item 35. The pressure relief system according to Item 31, wherein the chamber is composed of a basin, the input port and the output port are fluidly formed on the side surface of the basin, and the elastic membrane covers the opening of the basin.

[0139] Item 36. The pressure relief system according to Item 31, wherein the elastic membrane configured to change its shape includes an elastic membrane configured to switch from a default shape to an inflated shape in response to the pressure satisfying a predetermined pressure threshold.

[0140] Item 37. The pressure reduction system according to item 36, wherein the chamber and the elastic membrane are configured to operate together to reduce the pressure in the chamber when switched to the expanded shape.

[0141] Item 38. The pressure reduction system according to item 36, wherein the elastic membrane is prevented from returning to its default shape after switching to the expanded shape.

[0142] Item 39. A process for forming a pressure reduction device, comprising providing a body including a chamber, an input port, and an output port, wherein the chamber is configured to accumulate fluid from an upstream tube fluidly coupled to the input port and supply the fluid to a downstream tube fluidly coupled to the output port; and fluidly sealing an elastic membrane to the exposed opening of the chamber so that fluid does not pass through the exposed opening, wherein the elastic membrane is configured and sealed to change shape in response to the pressure caused by the fluid accumulated in the chamber.

[0143] Item 40. The process according to item 39, wherein the elastic membrane has a predetermined thickness and shape configured to bend and deform in response to the pressure caused by the fluid accumulated in the chamber.

[0144] Item 41. The process according to item 40, wherein the elastic membrane becomes substantially flat when the current pressure meets a first predetermined pressure threshold and becomes convex in response to the current pressure meeting a second predetermined pressure threshold.

[0145] Item 42. The process according to item 41, wherein the elastic membrane is configured to protrude away from the chamber when the pressure is greater than a second predetermined pressure threshold, and the second predetermined pressure threshold is equal to or greater than the first predetermined pressure threshold.

[0146] Item 43. The process according to item 39, wherein the chamber is composed of a basin, an input port and an output port are formed fluidly on the side surface of the basin, and the elastic membrane covers the opening of the basin.

[0147] Item 44. The process according to item 31, including an elastic membrane configured to change shape, the elastic membrane being configured to switch from a default shape to an inflated shape in response to the pressure satisfying a predetermined pressure threshold.

[0148] Item 45. The process according to item 44, wherein the chamber and the elastic membrane are configured to operate together to reduce the pressure in the chamber when switched to the inflated shape.

[0149] Item 46. The process according to item 44, wherein the elastic membrane is prevented from returning to the default shape after switching to the inflated shape.

[0150] Item 47. A pressure relief device comprising a body including a chamber, an input port, and an output port, the chamber being configured to accumulate fluid from an upstream tube fluidly coupled to the input port and supply the fluid to a downstream tube fluidly coupled to the output port, and an elastic membrane that fluidly seals the exposed opening of the chamber, thereby preventing fluid from passing through the exposed opening, the elastic membrane being configured and sealed to change shape in response to the pressure caused by the fluid accumulated in the chamber.

[0151] Item 48. The elastic membrane has a predetermined thickness and shape configured to bend and deform in response to the pressure caused by the fluid accumulated in the chamber, and while the pressure in the chamber satisfies a first predetermined pressure threshold, it is substantially flat in the default state, and in response to the pressure satisfying a second predetermined pressure threshold, it switches to an inflated state and is configured to become convex. The elastic membrane is configured to protrude away from the chamber in response to the pressure becoming greater than the second predetermined pressure threshold. The pressure relief device according to Item 47, wherein the second predetermined pressure threshold is equal to or greater than the first predetermined pressure threshold.

[0152] Item 49. The pressure relief device according to Item 48, wherein the chamber and the elastic membrane are configured to operate together to reduce the pressure in the chamber when switching to the inflated state.

[0153] Item 50. The pressure relief device according to Item 48, wherein the elastic membrane is prevented from returning to its default shape after switching to the inflated shape.

[0154] Further considerations:

[0155] It is understood that the specific order or hierarchy of steps in the disclosed process is an illustration of an exemplary approach. Based on design preferences, it is understood that the specific order or hierarchy of steps in the process can be rearranged. Some of the steps can be executed simultaneously. The accompanying method claims present the elements of the various steps in a sample order and are not intended to be limited to the specific order or hierarchy presented.

[0156] The foregoing description has been provided to enable a person skilled in the art to practice the various aspects described herein. The foregoing description provides illustrative examples of the subject technology, and the subject technology is not limited to these examples. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Accordingly, the claims are not intended to be limited to the aspects shown herein, but rather are to be accorded the full scope consistent with the language of the claims, and references to singular elements are not intended to mean "sole" unless expressly so stated, but rather are intended to mean "one or more." Unless expressly stated otherwise, the term "some" refers to one or more. Masculine pronouns (e.g., "his") include feminine and neuter pronouns (e.g., "her" and "its"), and vice versa. Headings and subheadings, if any, are used for convenience only and do not limit the invention described herein.

[0157] The phrases "configured to," "operable to," and "programmed to" do not imply any particular tangible or intangible modification of a subject, but rather are intended to be used interchangeably. For example, a processor configured to monitor and control operations can mean a processor programmed to monitor and control operations, or a processor operable to monitor and control operations. Similarly, a processor configured to execute code can be interpreted as a processor programmed to execute code or a processor operable to execute code.

[0158] As used herein, the term "automatically" can include execution by a computer or machine without user intervention, e.g., in response to instructions for a term action by a computer or machine or other initiation mechanism. As used herein, the word "example" is used in the sense of "serving as an example or illustration". Any aspect or design described herein as an "example" should not necessarily be construed as being more preferred or advantageous than other aspects or designs.

[0159] Expressions such as "aspect" do not mean that such an aspect is essential to the target technology or that such an aspect applies to all configurations of the target technology. The disclosure related to an aspect may apply to all configurations or to one or more configurations. One aspect may provide one or more examples. Expressions such as "aspect" may refer to one or more aspects, and vice versa. Expressions such as "implementation form" do not mean that such an implementation form is essential to the target technology or that such an implementation form applies to all configurations of the target technology. The disclosure related to an implementation form may apply to all implementation forms or to one or more implementation forms. One implementation form may provide one or more examples. Expressions such as "implementation form" may refer to one or more implementation forms, and vice versa. Expressions such as "configuration" do not mean that such a configuration is essential to the target technology or that such a configuration applies to all configurations of the target technology. The disclosure related to a configuration may apply to all configurations or to one or more configurations. One configuration may provide one or more examples. Expressions such as "configuration" may refer to one or more configurations, and vice versa.

Claims

1. A main body including a chamber, an input port, and an output port, wherein the chamber has an opening exposed through a side surface of the main body, and accumulates fluid from an upstream portion of a drip line fluidly coupled to the input port, and the fluid is configured to be supplied to a downstream portion of the drip line fluidly coupled to the output port; a main body, An elastic membrane that fluidly seals the exposed opening so that the fluid does not pass through the exposed opening, and is configured to change shape and expand in response to an increase in pressure caused by the fluid accumulated in the chamber; An identification mechanism coupled to the elastic membrane and arranged to move outward away from the chamber as the pressure increases and the elastic membrane expands; Comprising, A pressure detection system, wherein a distance by which the identification mechanism moves in response to the pressure increase indicates the pressure increase.

2. The identification mechanism is, Including a plunger coupled to the elastic membrane and arranged to protrude outward away from the chamber, The pressure detection system further includes, A casing that surrounds at least a part of the elastic membrane and is coupled to at least a part of the main body, the casing having an aperture at a position of the plunger, and the plunger passing through the aperture; The pressure detection system according to claim 1, wherein the pressure detection system is configured such that as the pressure increases and the elastic membrane expands, the plunger moves to extend further beyond the aperture and the casing.

3. The pressure detection system according to claim 2, further comprising a bellows mechanism operably coupled to the casing, the bellows mechanism being mechanically movable laterally along the length of the plunger with respect to the casing so as to identify a position of a part of the bellows mechanism at the position of the plunger.

4. The pressure detection system according to claim 3, wherein the casing includes a threaded collar, the threaded collar includes the aperture, the bellows mechanism is coupled to the casing by being screwed into a thread of the threaded collar, and the bellows mechanism can be mechanically moved by rotating around the threaded collar according to the thread of the threaded collar.

5. Further comprising a plunger housing coupled to an outer portion of the casing so as to surround the plunger and the aperture. The plunger includes a first identifier and a second identifier disposed laterally on the plunger. The plunger housing has an opening at a position on the plunger housing such that the first identifier is visible when the plunger is in a first position associated with a first pressure, and the second identifier is visible when the plunger is in a second position associated with a second pressure. The pressure detection system according to claim 2.

6. The plunger housing is operably coupled to the casing and is mechanically movable laterally along the length of the plunger relative to the casing to change the position of the opening. The pressure detection system according to claim 5.

7. The identification mechanism Includes a plate coupled to the elastic membrane and disposed parallel to the chamber. The elastic membrane fluidly seals the inside of the chamber. As the pressure increases and the elastic membrane expands, the plate moves in one direction away from the body and the chamber. The pressure detection system according to claim 1.

8. The body has a rectangular structure having at least one flat side surface, and the pressure detection system further Comprises a transparent panel removably coupled to the body so as to be parallel to the at least one flat side surface and perpendicular to the plate. The movement of the end of the plate from the body and the distance the plate moves in response to the pressure increase are visible through the transparent panel. The pressure detection system according to claim 7.

9. The plate is rectangular, the elastic membrane constitutes a four-sided bellows, and each of the four sides is at least partially disposed within the chamber. The pressure detection system according to claim 8.

10. Providing a body including a chamber, an input port, and an output port, the chamber having an opening exposed through a side surface of the body and configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port and supply the fluid to a downstream portion of the drip line fluidly coupled to the output port. Fluidly sealing the exposed opening with an elastic membrane so that the fluid does not pass through the exposed opening, wherein the elastic membrane is configured to change shape and expand in response to an increase in pressure caused by the fluid accumulated in the chamber, the sealing; Coupling an identification mechanism to the elastic membrane, wherein the identification mechanism is arranged to move away from the chamber and outward as the pressure increases and the elastic membrane expands, the coupling; comprising; The distance by which the identification mechanism moves in response to the pressure increase indicates the pressure increase, a method.

11. A body including a chamber, an input port, and an output port, wherein the chamber has an opening exposed through a side surface of the body and accumulates fluid from an upstream portion of a drip line fluidly coupled to the input port, and the fluid is configured to supply the fluid to a downstream portion of the drip line fluidly connected to the output port, a body; An elastic membrane that fluidly seals the exposed opening so that the fluid does not pass through the exposed opening and is configured to change shape in response to a pressure caused by the fluid accumulated in the chamber satisfying a predetermined threshold, wherein the surface of the elastic membrane has one or more markings that deform when the elastic membrane changes shape, an elastic membrane; A pressure detection system comprising.

12. An image sensing device; One or more processors, Causing the image sensing device to read the one or more markings on the surface of the elastic membrane; Measuring a current change of the one or more markings from a default state based on the image sensing device reading the one or more markings; One or more processors configured to provide an indication of a current pressure associated with the fluid in the chamber based on the current change; The pressure detection system according to claim 11, further comprising.

13. The one or more processors further Determining that the current change of the one or more markings corresponds to the current pressure satisfying a predetermined threshold pressure; The pressure detection system according to claim 12, configured to provide a notification regarding that the current pressure satisfies the predetermined pressure threshold.

14. Further comprising an infusion pump, The one or more processors are further configured to Determine that the infusion pump has started an infusion of the fluid, Upon the start of the infusion, activate the image sensing device to capture an image of the one or more markings, Compare the captured image with one or more predetermined patterns corresponding to a default inflated state, Based on comparing the captured image with the one or more predetermined patterns, determine a threshold marking pattern for detecting excessive pressure in the infusion line, During the infusion, use the image sensing device to periodically monitor the one or more markings for the threshold marking pattern, The pressure detection system according to claim 12, configured to provide an alert when the threshold marking pattern is detected.

15. Further comprising an infusion pump, The one or more processors are further configured to Determine that the infusion pump has started an infusion of the fluid, Determine that the current change of the one or more markings corresponds to excessive pressure associated with the infusion of the fluid, In response to determining that the current change corresponds to excessive pressure, (i) provide an alert indicating that the current pressure has exceeded a safe pressure, and (ii) be configured to send a signal to the infusion pump to end the infusion, The pressure detection system according to claim 12, wherein the infusion ends in response to the signal.

16. The one or more processors are configured to Based on the image sensing device reading a first change of the one or more markings from the default state, determine that the infusion pump has started an infusion of the fluid, the pressure detection system according to claim 15.

17. The one or more processors are further configured to Determine that the current change of the one or more markings corresponds to the current pressure not satisfying a predetermined threshold pressure, The pressure detection system according to claim 12, configured to provide a notification regarding that the current pressure does not satisfy the predetermined pressure threshold.

18. further comprising an infusion pump, wherein the one or more processors are further configured to determine that the infusion pump has started priming the infusion line, and in response to the pressure not meeting the predetermined pressure threshold, provide an alert indicating that the priming of the infusion line is incomplete, for the pressure detection system according to claim 17.

19. the elastic membrane is configured to be flat when the current pressure meets a first predetermined pressure threshold and convex in response to the current pressure meeting a second predetermined pressure threshold, and the one or more markings include a plurality of straight lines when the elastic membrane is flat, and the plurality of straight lines deform into a pattern of curved lines according to the amount of curvature of the elastic membrane when it is convex, wherein the one or more processors are configured to detect the pattern of the curved lines and match them with one or more predetermined patterns, and determine the current pressure based on indexing a matched pattern having a predetermined pressure value, for the pressure detection system according to claim 12.

20. the one or more processors are further configured to determine the expansion state of the elastic membrane based on the markings read from the surface of the elastic membrane, the expansion state including the amount of shape change, and determine the deviation of the pressure in the chamber from the baseline pressure based on the determined expansion state, for the pressure detection system according to claim 12.

21. a body including a chamber, an input port, and an output port, the chamber being configured to accumulate fluid from an upstream tube fluidly coupled to the input port and supply the fluid to a downstream tube fluidly coupled to the output port, and an elastic membrane that fluidly seals the exposed opening of the chamber, thereby preventing the fluid from passing through the exposed opening, comprising a pressure relief device, wherein the elastic membrane is configured and sealed to change its shape in response to the pressure caused by the fluid accumulated in the chamber.

22. The elastic membrane has a predetermined thickness and shape configured to bend and deform in response to the pressure caused by the fluid accumulated in the chamber, and is substantially flat in a default state while the pressure in the chamber satisfies a first predetermined pressure threshold, and is configured to switch to an inflated state and become convex in response to the pressure satisfying a second predetermined pressure threshold, and the elastic membrane is configured to protrude away from the chamber in response to the pressure becoming greater than the second predetermined pressure threshold, and the second predetermined pressure threshold is equal to or greater than the first predetermined pressure threshold, the pressure reducing device according to claim 21.

23. The chamber and the elastic membrane are configured to operate together to reduce the pressure in the chamber when switching to the inflated state, the pressure reducing device according to claim 22.

24. The elastic membrane is prevented from returning to its default shape after switching to the inflated shape, the pressure reducing device according to claim 22 or 23.

25. Providing a body including a chamber, an input port, and an output port, and configured to accumulate fluid from an upstream portion of a drip line fluidly coupled to the input port and supply the fluid to a downstream portion of the drip line fluidly coupled to the output port; Fluidly sealing an elastic membrane to an exposed opening of the chamber so that the fluid does not pass through the exposed opening, and the elastic membrane is configured to change its shape in response to the pressure caused by the fluid accumulated in the chamber satisfying a predetermined threshold, and the elastic membrane has one or more markings on the surface of the elastic membrane that deform when the elastic membrane changes its shape; A method of providing a pressure reducing system including.

26. Configuring an image sensing device to read the one or more markings on the surface of the elastic membrane; Configuring a processor to measure a current change of the one or more markings from a default state based on the image sensing device reading the one or more markings; Configuring the processor to provide an indication of a current pressure associated with the fluid in the chamber based on the current change; The method of claim 25, further comprising. **Claim 27** Configuring the processor to determine that the current change of the one or more markings corresponds to the current pressure satisfying a predetermined threshold pressure; Configuring the processor to provide a notification regarding the current pressure satisfying the predetermined pressure threshold; The method of claim 26, further comprising. **Claim 28** Configuring the processor to determine that an infusion pump has started an infusion of the fluid; Configuring the processor to operate the image sensing device to capture an image of the one or more markings when the infusion is started; Configuring the processor to compare the captured image with one or more predetermined patterns corresponding to a default inflated state; Configuring the processor to determine a threshold marking pattern for detecting overpressure in the infusion line based on comparing the captured image with the one or more predetermined patterns; Configuring the processor to periodically monitor the one or more markings for the threshold marking pattern using the image sensing device during the infusion; Configuring the processor to provide an alert when the threshold marking pattern is detected; The method of claim 26, further comprising. **Claim 29** Configuring the processor to determine that an infusion pump has started an infusion of the fluid; Configuring the processor to determine that the current change of the one or more markings corresponds to an overpressure associated with the infusion of the fluid; In response to determining that the current change corresponds to an overpressure, configuring the processor to: (i) provide an alert indicating that the current pressure has exceeded a safe pressure and (ii) send a signal to the infusion pump to end the infusion; Further comprising, The method of claim 26, wherein the infusion ends in response to the signal. **Claim 30** The elastic membrane is configured to be flat when the current pressure satisfies a first predetermined pressure threshold and to be convex in response to the current pressure satisfying a second predetermined pressure threshold, and the one or more markings include a plurality of straight lines when the elastic membrane is flat, and the plurality of straight lines are deformed into a pattern of curved lines according to the amount of curvature of the elastic membrane when it is in the convex shape. The process further comprises configuring the processor to detect the pattern of the curved line and match it with one or more predetermined patterns, configuring the processor to determine the current pressure based on indexing a matched pattern having a predetermined pressure value, The method according to claim 26, comprising.

Images