Negative pressure drainage equipment

Abstract

The invention discloses negative pressure drainage equipment, which comprises a flexible deformable body, a plurality of negative pressure air holes, a plurality of drainage holes and a plurality of drainage holes, the supporting shell is wrapped outside the flexible deformable body, the supporting shell is provided with an air pipe connector, and the air pipe connector communicates with the multiple negative pressure air holes; the size of the flexible deformation body is variable, and the maximum size of the flexible deformation body is limited by the inner size of the supporting shell; the negative pressure device is provided with a negative pressure pump and a drainage bottle, and the drainage bottle is provided with a first catheter connected to the negative pressure pump in a sealed mode and a second catheter connected to the air pipe connector in a sealed mode. When a patient changes medicine due to gradual healing of a wound, a medical worker selects a supporting shell with a smaller size, then the size of the flexible deformable body is reduced, the flexible deformable body is placed in the supporting shell, the bottom face of the flexible deformable body is attached to the wound of the patient, and the whole wound position is covered with a semi-permeable membrane; according to the technology, the surgical risk and the surgical cost of a patient are greatly reduced, and the workload of medical staff is also reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to negative pressure drainage equipment. Background Art

[0002] Vacuum drainage is a medical technique that utilizes the principle of negative pressure suction to promote wound healing. Using a specialized device, a controlled negative pressure environment is created on the wound surface, continuously aspirating exudate, necrotic tissue, and bacteria. This reduces edema, improves local microcirculation, stimulates granulation tissue growth, and accelerates wound closure. This technique is suitable for various acute and chronic wounds (such as open fractures, diabetic foot ulcers, and burns), but is contraindicated for actively bleeding or cancerous ulcers. During the procedure, a stable pressure of -125 mmHg to -450 mmHg must be maintained, and the properties of the drainage fluid and wound response must be closely monitored.

[0003] Currently, in clinical practice, the dressing is typically cut to match the wound size and then sutured to the wound to ensure a close fit and prevent displacement. Finally, a negative pressure tube is connected, utilizing the hospital's existing central negative pressure system to provide negative pressure suction. Because the dressing is sutured to the wound, as the wound heals and the wound area decreases, the patient needs to remove the stitches and re-sew a new dressing in a sterile operating room. This increases the cost and surgical risks for the patient, and also increases the workload for medical staff. Summary of the Invention

[0004] The present invention aims to provide a negative pressure drainage device which is convenient for dressing change.

[0005] According to a first embodiment of the present invention, a negative pressure drainage device comprises:

[0006] The flexible deformable body has a plurality of negative pressure air holes extending vertically through the bottom surface thereof;

[0007] a supporting shell wrapped around the flexible deformable body, the supporting shell being provided with an air pipe interface, the air pipe interface being in communication with the plurality of negative pressure air holes; the flexible deformable body being variable in size, the maximum size of the flexible deformable body being limited by the inner size of the supporting shell;

[0008] The negative pressure device is provided with a negative pressure pump and a drainage bottle. The drainage bottle is provided with a first conduit sealedly connected to the negative pressure pump and a second conduit sealedly connected to the tracheal interface.

[0009] The negative pressure drainage device according to the embodiment of the present invention has at least the following beneficial effects: when in use, a supporting shell of a suitable size is selected, and then the flexible deformable body is placed in the supporting shell. Since the size of the flexible deformable body is variable, the flexible deformable body is always adapted to the supporting shell. Subsequently, the second catheter is connected to the tracheal interface to provide negative pressure suction for the supporting shell, and the bottom surface of the flexible deformable body is attached to the patient's wound so that the exudate at the wound can be sucked into the drainage bottle through the negative pressure air hole. Finally, the semi-permeable membrane is used to cover the entire wound position to maintain a closed environment. Since the bottom surface of the flexible deformable body does not generate suction on the wound outside the negative pressure air hole, the flexible deformable body at this time can be regarded as a multi- The hole suction cup can stick to the wound through negative pressure suction, reducing the possibility of relative displacement and increasing air tightness. The technical effect is equivalent to the effect of suturing. Therefore, this technology does not require suturing when used, and patients can change dressings in an ordinary dressing room; when the patient's wound gradually heals and needs to change dressings, the medical staff chooses a smaller supporting shell, then reduces the size of the flexible deformable body and places it in the supporting shell, and then fits the bottom surface of the flexible deformable body to the patient's wound, and uses a semi-permeable membrane to cover the entire wound position to complete the dressing operation; compared with the existing technology, this technology greatly reduces the surgical risks and surgical costs of patients, and also reduces the workload of medical staff.

[0010] According to some embodiments of the present invention, specifically, the flexible deformation body is a sponge component, and the supporting shell is a silicone component.

[0011] According to some embodiments of the present invention, the support shell has a folding structure, so that the size of the support shell is variable. When the patient's wound gradually heals and needs a dressing change, the medical staff can reduce the size of the support shell by folding the structure to meet the dressing change requirements.

[0012] According to some embodiments of the present invention, in order to facilitate adjustment of the size of the support shell, the support shell includes a support chamber and two folding structures, the two folding structures are arranged on both sides of the support chamber, and the support chamber is provided with the trachea interface.

[0013] According to some embodiments of the present invention, the folding structure includes multiple large chambers and multiple small chambers, the large chambers being alternately connected to the small chambers, and each of the small chambers being provided with creases. When folded, the small chambers are more susceptible to deformation than the large chambers due to the creases. When silicone with a Shore hardness of 90HA is used, the small chambers will not recover after deformation without external force.

[0014] According to some embodiments of the present invention, the flexible deformable body has a collapsible structure comprising a plurality of large cores and a plurality of small cores, the large cores being alternately connected to the small cores, and the material density of the large cores being greater than the material density of the small cores. When folded, the small cores are more easily compressed than the large cores due to the greater material density of the large cores. Furthermore, due to the constraints of the supporting shell, the small cores will not recover after being compressed and placed without external force.

[0015] According to some embodiments of the present invention, in order to adapt to the supporting shell, the flexible deformable body includes a hardened core and two retractable structures, the two retractable structures are arranged on both sides of the hardened core, and the hardened core and the large core are both provided with the negative pressure air holes.

[0016] According to some embodiments of the present invention, since the small core is compressed when subjected to force, in order to avoid obstruction of the negative pressure pores due to compression, the small core is not provided with the negative pressure pores.

[0017] According to some embodiments of the present invention, the bottom surface of the supporting shell is provided with a bell mouth, and the design of the bell mouth can optimize pressure distribution, reduce local compression, and enhance sealing and stability.

[0018] According to some embodiments of the present invention, the negative pressure device is equipped with an alarm, and the drainage bottle is provided with a liquid level sensor, the liquid level sensor's electrical signal being connected to the alarm. When the liquid level in the drainage bottle reaches a preset position, the liquid level sensor feeds this signal back to the controller, which then activates the alarm, alerting personnel through sound and light.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which:

[0021] Figure 1 Schematic diagram of the structure of the negative pressure drainage device provided by an embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the structure of the drainage unit provided by an embodiment of the present invention;

[0023] Figure 3 is a side view of a negative pressure device provided by an embodiment of the present invention;

[0024] Figure 4 yes Figure 3The negative pressure device is shown in a cross-sectional view along the AA section line.

[0025] In the accompanying drawings: 10-negative pressure device, 20-drainage unit, 11-display screen, 12-control panel, 300-drainage bottle, 400-negative pressure pump, 310-liquid level sensor, 320-first catheter, 330-second catheter, 100-flexible deformable body, 200-support shell, 101-negative pressure air hole, 110-hardened core, 120-folding structure, 121-large core, 122-small core, 201-trachea interface, 210-support chamber, 220-folding structure, 221-large chamber, 222-small chamber, 230-bell mouth. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] like Figure 1As shown, the negative pressure drainage device according to the first embodiment of the present invention includes a negative pressure device 10 and a drainage unit 20. The drainage unit 20 acts directly on the patient's wound, obtains negative pressure suction by connecting with the negative pressure device 10, and relies on the negative pressure suction to absorb the exudate from the patient's wound into the negative pressure device 10, thereby reducing edema in the wound area, improving local microcirculation, stimulating the growth of granulation tissue, and accelerating wound closure.

[0031] Among them, the structure of the negative pressure device 10 is as follows Figure 3 and Figure 4 As shown, the negative pressure device 10 has two inner cavities, one of which is provided with a control circuit board (not shown in the drawings), a display screen 11, a control panel 12, an alarm (not shown in the drawings) and other electronic components, and the other inner cavity is provided with a drainage bottle 300, a negative pressure pump 400, a sensor and other executive components to effectively isolate the components in the two inner cavities and prevent the electronic components from being contaminated by the drainage fluid for management and maintenance.

[0032] A pressure sensor (not shown) is provided on the pipeline of the negative pressure pump 400. The control panel 12 can display the air pressure of the negative pressure pump 400 in real time and adjust the power of the negative pressure pump 400 via control buttons to adapt to different operating conditions. The alarm is electrically connected to the liquid level sensor 310 in the drainage bottle 300. The liquid level sensor 310 can be a photoelectric liquid level sensor, a capacitive liquid level sensor, or an ultrasonic liquid level sensor. In this embodiment, the liquid level sensor 310 is preferably a capacitive liquid level sensor, which detects the liquid level by changing the capacitance between electrodes. It is installed on the outside of the drainage bottle 300 to achieve non-contact detection and avoid contact with the drainage fluid. When the liquid level sensor 310 detects that the drainage fluid in the drainage bottle 300 is above the set liquid level, the liquid level sensor 310 feeds a signal back to the controller. The control circuit compares the signal with a preset threshold. When the liquid level exceeds the threshold, the control circuit outputs a high level to drive the alarm. The alarm turns on the circuit through a relay or transistor, and a buzzer sounds and an LED flashes, alerting relevant personnel through sound and light.

[0033] The cap of the drainage bottle 300 is sealedly connected to the negative pressure pump 400 via a first conduit 320. A second conduit 330 extends outward from the cap of the drainage bottle 300. Whenever the negative pressure pump 400 is activated, it draws air from the drainage bottle 300 through the first conduit 320, placing the drainage bottle 300 under negative pressure. When the drainage bottle 300 is under negative pressure, it draws air from the outside through the second conduit 330, ultimately maintaining a negative pressure in the second conduit 330. The second conduit 330 draws liquid into the drainage bottle 300. Since the density of liquid is greater than that of air, the liquid is deposited below the air. When the liquid in the bottle does not exceed the set liquid level, the negative pressure pump 400 can only draw air from the drainage bottle 300. However, once the liquid in the bottle exceeds the set liquid level, the negative pressure pump 400 may draw liquid from the drainage bottle 300, causing the drainage liquid to contaminate the entire negative pressure pipeline, which may cause damage to the negative pressure pump 400. Therefore, an alarm needs to be set to provide necessary reminders.

[0034] Furthermore, the negative pressure device 10 can be configured as a portable device, electrically powered by a rechargeable battery (not shown in the drawings), and provided with a shoulder strap (not shown in the drawings) on one of its outer surfaces for easy wearing by the patient. When the patient needs to go out for a walk, the negative pressure device 10 can be carried on the shoulder strap to maintain continuous negative pressure treatment of the wound. Furthermore, the portable negative pressure device 10 is also very suitable for patients to recuperate at home, allowing them to receive treatment outside of medical institutions.

[0035] In addition, the structure of the drainage unit 20 is as follows Figure 2 As shown, it includes a flexible deformable body 100 and a support shell 200. The flexible deformable body 100 is disposed in the support shell 200, and the support shell 200 provides external support for the flexible deformable body 100. As the name suggests, the size of the flexible deformable body 100 is variable, and it is deformed mainly through the following structure.

[0036] The flexible deformable body 100 may be a sponge member, specifically an EPDM rubber foam sponge, having a flat bottom surface. The bottom surface of the flexible deformable body 100 is provided with a plurality of negative pressure holes 101 extending vertically therethrough. In locations where the negative pressure holes 101 are not provided, the flexible deformable body 100 does not generate negative pressure suction, and thus the flexible deformable body 100 can be considered a porous suction cup. When the plurality of negative pressure holes 101 generate negative pressure suction, the bottom surface of the flexible deformable body 100 has a certain degree of softness, and thus the flexible deformable body 100 can be closely adhered to the wound under the action of the negative pressure suction, thereby reducing the possibility of relative displacement and increasing airtightness. This is technically equivalent to the effect of suturing.

[0037] The flexible deformable body 100 includes a hardened core 110 and two retractable structures 120. The two retractable structures 120 are located on both sides of the hardened core 110. Due to the high material density of the hardened core 110, the hardened core 110 is not easily deformed by force and can maintain a fixed size during use. At the same time, the retractable structure 120 includes a plurality of large cores 121 and a plurality of small cores 122. The large cores 121 and the small cores 122 are alternately connected, and the material density of the large cores 121 is greater than the material density of the small cores 122. If the material density is compared, the material density of the hardened core 110 ≥ the material density of the large core 121 > the material density of the small core 122, so the small core 122 is more easily compressed than the large core 121.

[0038] When the size of flexible deformable body 100 needs to be reduced, the flexible deformable body 100 can be pressed in the longitudinal direction to compress the small core 122, thereby achieving the purpose of reducing the size of flexible deformable body 100. When the size of flexible deformable body 100 needs to be expanded, the flexible deformable body 100 can be stretched in the longitudinal direction to stretch the small core 122, thereby achieving the purpose of expanding the size of flexible deformable body 100.

[0039] It should be further explained that since the small core 122 is compressed when subjected to force, in order to avoid obstruction of the negative pressure pores 101 due to compression, the small core 122 is not provided with negative pressure pores 101, that is, the negative pressure pores 101 are only provided in the hardened core 110 and the large core 121.

[0040] Specifically, the support housing 200 may be made of silicone due to its excellent compatibility with human skin. It is provided with an airway interface 201, which communicates with the plurality of negative pressure air holes 101 and is sealedly connected to the second conduit 330 of the drainage bottle 300. Driven by the negative pressure pump 400, air is drawn into the negative pressure pump in sequence through the negative pressure air holes 101, the airway interface 201, the second conduit 330, the drainage bottle 300, and the first conduit 320, and is ultimately discharged from the negative pressure pump's exhaust nozzle.

[0041] In the present invention, the structure of the supporting shell 200 has two embodiments. In one embodiment, the size of the supporting shell 200 remains unchanged. However, since the size of the flexible deformable body 100 is variable, the flexible deformable body 100 is always adapted to the supporting shell 200. At this time, the maximum size of the flexible deformable body 100 is limited by the inner size of the supporting shell 200, so the small core 122 will not recover after being compressed and inserted without external force.

[0042] Using the above-mentioned embodiment, when the negative pressure drainage device is in use, a support shell 200 with a size similar to the size of the wound is selected, and then the flexible deformable body 100 is placed in the support shell 200. Since the size of the flexible deformable body 100 is variable, the flexible deformable body 100 is always adapted to the support shell 200. Then, the second conduit 330 is connected to the trachea interface 201 to provide negative pressure suction for the support shell 200, and the bottom surface of the flexible deformable body 100 is attached to the patient's wound so that the exudate in the wound can be sucked into the drainage bottle 300 through the negative pressure air hole 101. Finally, a semipermeable membrane is used to cover the entire wound position to maintain a closed environment.

[0043] Since the bottom surface of the flexible deformable body 100 does not generate suction on the wound outside the negative pressure pores 101, the flexible deformable body 100 at this time can be regarded as a porous suction cup, which can be tightly attached to the wound through negative pressure suction, reducing the possibility of relative displacement and increasing air tightness. In terms of technical effect, it is equivalent to the effect of suturing. Therefore, this technology does not require suturing when in use, and patients can change dressings in ordinary dressing rooms. When the patient changes dressings due to gradual healing of the wound, the medical staff selects a smaller supporting shell 200, then reduces the size of the flexible deformable body 100 and places it into the supporting shell 200, and then fits the bottom surface of the flexible deformable body 100 to the patient's wound, and uses a semi-permeable membrane to cover the entire wound position to complete the dressing change operation. Compared with the existing technology, this technology greatly reduces the surgical risks and surgical costs of patients, and also reduces the workload of medical staff.

[0044] In some other embodiments, the support shell 200 has a folding structure 220, making the size of the support shell 200 variable. The support shell 200 includes a support chamber 210 and two folding structures 220. The two folding structures 220 are arranged on both sides of the support chamber 210. The support chamber 210 is provided with a trachea interface 201. At the same time, the folding structure 220 includes multiple large chambers 221 and multiple small chambers 222. The large chambers 221 are alternately connected to the small chambers 222, and each small chamber 222 is provided with a fold. Because the small chambers 222 are provided with folds, they are more susceptible to deformation than the large chambers 221. When silicone with a Shore hardness of 90HA is selected, the small chambers 222 will not recover after deformation without external force, thereby maintaining their original folded state.

[0045] Correspondingly, the large chamber 221 of the support shell 200 is used to accommodate the large core 121 of the flexible deformable body 100, the small chamber 222 of the support shell 200 is used to accommodate the small core 122 of the flexible deformable body 100, and the support chamber 210 of the support shell 200 is used to accommodate the hardened core 110 of the flexible deformable body 100. When it is necessary to reduce the size of the drainage unit 20, it is only necessary to press the support shell 200 in the length direction so that the small chamber 222 is deformed by force. At the same time, the small core 122 is compressed to achieve the purpose of reducing the size of the drainage unit 20. When it is necessary to expand the size of the drainage unit 20, it is only necessary to stretch the support shell 200 in the length direction to restore the structure of the small chamber 222. At the same time, the small core 122 is stretched to achieve the purpose of expanding the size of the drainage unit 20.

[0046] Using the above-mentioned embodiment, when the negative pressure drainage device is in use, the flexible deformable body 100 is first placed in the supporting shell 200, and then the size of the drainage unit 20 is adjusted according to the size of the wound. Subsequently, the second catheter 330 is connected to the tracheal interface 201 to provide negative pressure suction for the supporting shell 200, and the bottom surface of the flexible deformable body 100 is attached to the patient's wound so that the exudate in the wound can be sucked into the drainage bottle 300 through the negative pressure air hole 101. Finally, a semi-permeable membrane is used to cover the entire wound position to maintain a closed environment.

[0047] When the patient's wound gradually heals and needs to be changed, the medical staff will reduce the size of the drainage unit 20 according to the size of the wound, and fit the bottom surface of the flexible deformable body 100 to the patient's wound, and finally use a semipermeable membrane to cover the entire wound position to complete the dressing change operation.

[0048] It should be further explained that the supporting shell 200 and the flexible deformable body 100 are both disposable items and need to be replaced with new ones when changing the dressing to prevent the wound from being infected.

[0049] In some embodiments of the present invention, regardless of the structure of the supporting shell 200, a bell mouth 230 is provided on its bottom surface. The gradually expanding structure of the bell mouth 230 can disperse the adsorption pressure of the drainage unit 20 to a larger skin area, avoiding pressure sores or discomfort caused by concentrated force on the edges, and is particularly suitable for long-term wear scenarios. In addition, the flared design can fit the curved surfaces of the skin such as joints and limbs, and improve the adsorption seal by increasing the contact area to prevent air leakage or falling off. Finally, the skin may deform during movement, and the flexible flaring design of the bell mouth 230 can adapt to movement through deformation, thereby maintaining the functional stability of the drainage unit 20.

[0050] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. Negative pressure drainage equipment, characterized in that, include: The flexible deformable body (100) has a bottom surface provided with a plurality of negative pressure air holes (101) extending vertically therethrough; a supporting shell (200) wrapped around the flexible deformable body (100), the supporting shell (200) being provided with an air pipe interface (201), the air pipe interface (201) being in communication with the plurality of negative pressure air holes (101); the flexible deformable body (100) being variable in size, the maximum size of the flexible deformable body (100) being limited by the inner size of the supporting shell (200); A negative pressure device (10) is provided with a negative pressure pump (400) and a drainage bottle (300), wherein the drainage bottle (300) is provided with a first conduit (320) sealedly connected to the negative pressure pump (400) and a second conduit (330) sealedly connected to the tracheal interface (201).

2. The negative pressure drainage device according to claim 1, characterized in that: The flexible deformable body (100) is a sponge component, and the supporting shell (200) is a silica gel component.

3. The negative pressure drainage device according to claim 2, characterized in that: The supporting shell (200) has a folding structure (220), so that the size of the supporting shell (200) is variable.

4. The negative pressure drainage device according to claim 3, characterized in that: The supporting shell (200) comprises a supporting chamber (210) and two folding structures (220), wherein the two folding structures (220) are arranged on both sides of the supporting chamber (210), and the supporting chamber (210) is provided with the trachea interface (201).

5. The negative pressure drainage device according to claim 3 or 4, characterized in that: The folding structure (220) comprises a plurality of large chambers (221) and a plurality of small chambers (222), wherein the large chambers (221) are alternately connected to the small chambers (222), and each of the small chambers (222) is provided with a fold.

6. The negative pressure drainage device according to claim 5, characterized in that: The flexible deformable body (100) has a retractable structure (120), the retractable structure (120) comprising a plurality of large cores (121) and a plurality of small cores (122), the large cores (121) and the small cores (122) being alternately connected, and the material density of the large cores (121) being greater than the material density of the small cores (122).

7. The negative pressure drainage device according to claim 6, characterized in that: The flexible deformable body (100) comprises a hardened core (110) and two retractable structures (120), wherein the two retractable structures (120) are arranged on both sides of the hardened core (110), and the hardened core (110) and the large core (121) are both provided with the negative pressure air holes (101).

8. The negative pressure drainage device according to claim 7, characterized in that: The small core (122) is not provided with the negative pressure air hole (101).

9. The negative pressure drainage device according to claim 1, characterized in that: The bottom surface of the supporting shell (200) is provided with a bell mouth (230).

10. The negative pressure drainage device according to claim 1, characterized in that: The negative pressure device (10) is provided with an alarm, and a liquid level sensor (310) is provided in the drainage bottle (300), and an electrical signal of the liquid level sensor (310) is connected to the alarm.

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