Negative pressure wound therapy and drug delivery device

Abstract

The utility model discloses a negative pressure drainage and dosing device, including four -way valve, puncture needle connecting pipe, syringe, saline connecting pipe and negative pressure aspirator, four -way valve has first interface, second interface, third interface and fourth interface, one end of puncture needle connecting pipe is connected with first interface, and the other end of puncture needle connecting pipe is suitable for connecting puncture needle, syringe is connected with second interface, is used to inject the liquid medicine to the patient, one end of saline connecting pipe is connected with third interface, and the other end of saline connecting pipe is suitable for connecting saline bag, is used to deliver physiological saline to the patient, negative pressure aspirator is connected with fourth interface, is used to extract the effusion of patient part through negative pressure adsorption. The utility model discloses a negative pressure drainage and dosing device, realizes the integration design of negative pressure drainage, liquid medicine injection and saline flushing, and medical staff can flexibly switch different functions according to the need, need not to replace the pipeline or repeated puncture, improves the treatment efficiency, and reduces the patient's pain and infection risk.

Description

Technical Field

[0001] This utility model relates to a negative pressure drainage device, and more particularly to a negative pressure drainage and drug delivery device. Background Technology

[0002] In clinical medical practice, patients with fluid accumulation usually require drainage treatment. Traditional drainage methods mainly include natural drainage and negative pressure drainage. Natural drainage uses gravity to allow the fluid to drain naturally, but this method has poor drainage effect, slow drainage speed, and is prone to bacterial infection.

[0003] Currently, the commonly used negative pressure drainage devices in clinical practice typically employ simple negative pressure suction bottles for drainage. While this method achieves basic drainage effects, it necessitates changing the tubing or interrupting the drainage process if medication injection or flushing is required during drainage, or even requiring re-puncture. This not only increases the workload of medical staff and patient discomfort but also raises the risk of infection. Furthermore, the need for repeated replacement of tubing and instruments increases medical costs.

[0004] Therefore, there is an urgent need for a medical device that can simultaneously perform negative pressure drainage, drug injection, and flushing to improve treatment outcomes, reduce the workload of medical staff, lower the risk of infection, and enhance the patient's treatment experience. Utility Model Content

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this invention is to provide a negative pressure drainage and drug delivery device.

[0006] To achieve the above objectives, the negative pressure drainage and drug delivery device according to an embodiment of the present invention includes:

[0007] A four-way valve, wherein the four-way valve has a first port, a second port, a third port and a fourth port;

[0008] A puncture needle connecting tube, one end of which is connected to the first interface, and the other end of which is adapted to connect to a puncture needle;

[0009] A syringe, which is connected to the second interface, is used to inject a drug solution into the affected area;

[0010] A saline connecting tube, one end of which is connected to the third interface, and the other end of which is adapted to connect to a saline bag for delivering physiological saline to the affected area.

[0011] A negative pressure suction device is connected to the fourth interface to extract the accumulated fluid from the diseased part of the body through negative pressure adsorption.

[0012] According to the negative pressure drainage and drug delivery device provided in this embodiment, the puncture needle connecting tube, syringe, saline connecting tube and negative pressure suction device are integrated and connected by a four-way valve, realizing an integrated design of negative pressure drainage, drug injection and saline flushing. This allows medical staff to flexibly switch between different functions as needed without changing the tubing or repeating punctures, which improves treatment efficiency and reduces patient pain and infection risk. At the same time, the device has a simple structure and is easy to operate. The flow direction of the liquid can be accurately controlled by controlling the switches of each interface of the four-way valve, avoiding misoperation and ensuring the safety and reliability of the treatment process. It can meet the diverse needs of fluid drainage and local drug delivery in clinical treatment.

[0013] In addition, the negative pressure drainage and drug delivery device according to the above embodiments of this utility model may also have the following additional technical features:

[0014] According to one embodiment of the present invention, the four-way valve includes a four-way component and four switching valves, the four switching valves being respectively disposed on the four ports of the four-way component, and the outlet end of each switching valve being connected to a Luer connector.

[0015] According to one embodiment of the present invention, the negative pressure suction device includes an accordion-type compression bottle and a spring. The spring is disposed inside the accordion-type compression bottle to stretch and restore the compressed accordion-type compression bottle.

[0016] According to one embodiment of the present invention, the puncture needle connecting tube is provided with a Robert clamp for adjusting the opening of the puncture needle connecting tube.

[0017] According to one embodiment of the present invention, the brine connecting pipe is provided with a flow rate regulator for adjusting the opening degree of the brine connecting pipe.

[0018] According to one embodiment of the present invention, the accordion-style compression bottle is provided with graduation lines for indicating the volume of liquid being pumped.

[0019] According to one embodiment of the present invention, a three-way connector is provided between the syringe and the second interface for connecting multiple syringes at different times.

[0020] According to one embodiment of the present invention, the negative pressure aspirator is connected to the fourth interface via a first connecting conduit, and the syringe is connected to the second interface via a second connecting conduit.

[0021] The puncture needle connecting tube, saline connecting tube, first connecting catheter, and second connecting catheter are all marked with different colored strips to distinguish the purpose of different tubes.

[0022] According to one embodiment of the present invention, the bottom of the negative pressure suction device is also provided with a drain port with a drain switch for connecting a replaceable liquid collection bag.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the negative pressure drainage and drug delivery device according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the negative pressure drainage and drug delivery device in application according to an embodiment of this utility model;

[0027] Figure 3 This is an exploded view of the negative pressure drainage and drug delivery device according to an embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of another embodiment of the negative pressure suction device in the negative pressure drainage and drug delivery device of this utility model.

[0029] Figure label:

[0030] 10. Four-way valve;

[0031] 101. Four-way connector;

[0032] 102. Switch valve;

[0033] 1021. Luer joint;

[0034] 20. Puncture needle connecting tube;

[0035] 21. Robert pipe clamp;

[0036] 30. Syringe;

[0037] 31. Second connecting catheter;

[0038] 40. Saltwater connection pipe;

[0039] 41. Flow rate regulator;

[0040] 50. Negative pressure suction device;

[0041] 501. Accordion-style compression bottle;

[0042] 502. Drainage port;

[0043] 51. First connecting catheter;

[0044] 60. Puncture needle;

[0045] 70. Saline bags.

[0046] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0048] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] The negative pressure drainage and drug delivery device of this utility model embodiment is described in detail below with reference to the accompanying drawings.

[0053] Reference Figures 1 to 3 As shown, the negative pressure drainage and drug delivery device provided according to the embodiment of this utility model includes a four-way valve 10, a puncture needle connecting tube 20, a syringe 30, a saline connecting tube 40, and a negative pressure suction device 50.

[0054] Specifically, the four-way valve 10 has a first interface, a second interface, a third interface, and a fourth interface. For example, the four-way valve 10 is made of medical-grade material and has an internal cross-shaped flow channel structure. Each interface is equipped with an independently controllable rotary switch for controlling the opening and closing state of the corresponding channel.

[0055] One end of the puncture needle connecting tube 20 is connected to the first interface, and the other end of the puncture needle connecting tube 20 is adapted to connect to the puncture needle 60. The puncture needle connecting tube 20 is made of medical-grade tubing and has good flexibility and negative pressure resistance. Preferably, the other end of the puncture needle connecting tube 20 is provided with a standard connector, suitable for connecting medical puncture needles of various specifications.

[0056] The syringe 30 is connected to the second interface for injecting medication into the affected area. A standard medical syringe 30 is selected, and its capacity can be adjusted according to clinical needs. Medication is precisely injected into the affected area using the syringe 30.

[0057] One end of the saline connecting tube 40 is connected to the third interface, and the other end of the saline connecting tube 40 is adapted to connect to the saline bag 70 for delivering physiological saline to the affected area. Preferably, the saline connecting tube 40 is also made of medical-grade tubing, and the other end of the saline connecting tube 40 is provided with a standard connector adapted to connect to the medical saline bag 70 for delivering physiological saline to the affected area.

[0058] The negative pressure suction device 50 is connected to the fourth interface to extract the accumulated fluid from the diseased area through negative pressure adsorption. The negative pressure suction device 50 can be a manual or electric negative pressure device, and the negative pressure suction device 50 is reliably connected to the fourth interface to extract the accumulated fluid from the diseased area through negative pressure adsorption.

[0059] In practical use, medical staff can control the on / off state of each port of the four-way valve 10 to achieve different functions according to treatment needs:

[0060] When medication needs to be injected, open the switches of the first and second ports, and simultaneously close the switches of the third and fourth ports. Pushing the piston of the syringe 30 will inject the medication into the affected area.

[0061] When saline flushing is required, open the switches of the first and third ports while closing the switches of the second and fourth ports. Gravity will then allow the saline solution to flow through the puncture site for flushing.

[0062] When fluid drainage is required, open the switches of the first and fourth ports, and simultaneously close the switches of the second and third ports. Then, start the negative pressure suction device 50 to extract the fluid.

[0063] According to the negative pressure drainage and drug delivery device provided in this embodiment, the puncture needle connecting tube 20, syringe 30, saline connecting tube 40 and negative pressure suction device 50 are integrated and connected by a four-way valve 10, realizing an integrated design of negative pressure drainage, drug injection and saline flushing. This allows medical staff to flexibly switch between different functions as needed without changing the tubing or repeating punctures, which improves treatment efficiency and reduces patient pain and infection risk. At the same time, the device has a simple structure and is easy to operate. The flow direction of the liquid can be accurately controlled by controlling the switches of each interface of the four-way valve 10, avoiding misoperation and ensuring the safety and reliability of the treatment process. It can meet the diverse needs of fluid drainage and local drug delivery in clinical treatment.

[0064] In one embodiment of the present invention, the four-way valve 10 includes a four-way component 101 and four switching valves 102. The four switching valves 102 are respectively disposed on the four ports of the four-way component 101, and the outlet end of each switching valve 102 is connected to a Luer connector 1021.

[0065] The switch valve 102 adopts a rotary switch structure, and its main body is made of medical-grade polypropylene material, which has good corrosion resistance and sealing performance. Each switch valve 102 can be rotated and adjusted by rotating the handle, and has a clear mechanical positioning between the open and closed positions. Each switch valve 102 has a standardized Luer connector 1021 at its outlet end. The Luer connector 1021 can effectively prevent liquid leakage and air ingress.

[0066] By adopting the combined design of the four-way connector 101, the switching valve 102, and the Luer connector 1021, this embodiment not only achieves reliable control of the fluid circuit, but also greatly improves the versatility of the device through the standardized Luer connector 1021, enabling it to achieve quick and reliable connection with common medical device accessories on the market, thereby improving the practicality and economy of the device and providing greater convenience for clinical applications.

[0067] In one embodiment of this utility model, the negative pressure suction device 50 includes an accordion-style compression bottle 501 and a spring. The accordion-style compression bottle 501 is made of medical-grade elastomer material and has multiple transverse crease rings. These crease rings are evenly distributed along the longitudinal direction of the bottle body, allowing the bottle body to be compressed and extended axially. The bottle body material has excellent elastic deformation capacity and fatigue resistance, ensuring stable mechanical properties during repeated compression use.

[0068] A spring is disposed within the accordion-type compression bottle 501 to stretch and restore the compressed accordion-type compression bottle 501. The spring is made of medical-grade stainless steel and undergoes a special surface treatment process, giving it excellent corrosion resistance and fatigue strength. The two ends of the spring are fixedly connected to the top and bottom of the accordion-type compression bottle 501, respectively, ensuring stable compression during operation.

[0069] During use, when the accordion-style compression bottle 501 is compressed, the bottle body contracts axially, while the spring is compressed, storing elastic potential energy. When the pressure is released, the spring releases its potential energy, pushing the bottle body back to its original shape, thus generating negative pressure inside the bottle. This reciprocating motion can continue continuously, ensuring a sustained negative pressure attraction effect.

[0070] Through the above structural design, the negative pressure suction device 50 provided in this embodiment has the characteristics of simple structure and convenient operation. Stable negative pressure can be generated by manual operation, and the spring-assisted reset ensures reliable operation of the device. It is also easy to operate with one hand, which greatly improves the convenience and safety of clinical use.

[0071] Preferably, the accordion-style compression bottle 501 has graduations to indicate the volume of liquid aspirated. This facilitates observation of the aspirated fluid volume by medical personnel. The bottle body is made of a semi-transparent material, allowing for direct observation of the fluid accumulation.

[0072] In one embodiment of this utility model, a Robert clamp 21 is provided on the puncture needle connecting tube 20 for adjusting the opening degree of the puncture needle connecting tube 20. A flow rate regulator 41 is provided on the saline connecting tube 40 for adjusting the opening degree of the saline connecting tube 40.

[0073] In this embodiment, a Robert clamp 21 is provided on the puncture needle connecting tube 20. Medical staff can precisely control the opening of the tube by changing the pressure of the Robert clamp 21 on the puncture needle connecting tube 20, thereby achieving adjustment from fully open to fully closed, and meeting the precise flow control requirements of different treatment stages.

[0074] A flow rate regulator 41 is equipped on the brine connection pipe 40. This flow rate regulator 41 adopts a roller compression structure design. By rotating the roller, the compression depth of the roller on the brine connection pipe 40 can be changed, thereby achieving precise control of the brine flow rate.

[0075] The use of Robert clamp 21 and flow rate regulator 41 greatly improves the controllability and safety of the device, enabling medical staff to precisely control the injection rate of the drug solution and the flow rate of saline flushing according to clinical needs, which not only ensures the therapeutic effect but also improves the comfort and safety of patients.

[0076] In one embodiment of the present invention, a three-way connector is provided between the syringe 30 and the second interface for connecting multiple syringes 30 at different times.

[0077] This design allows healthcare professionals to prepare multiple syringes 30 simultaneously during treatment without frequent changes. When different medications need to be injected, syringes 30 containing different solutions can be pre-connected to the two branches of the three-way connector. By controlling the on / off state of each branch, the medications can be injected sequentially. This structure is particularly suitable for treatment scenarios requiring sequential drug administration or rapid switching between different medications. For example, some treatment protocols require the sequential injection of different types of drugs.

[0078] During use, the three-way connector makes the drug injection process smoother and more convenient. Medical staff can pre-load different syringes 30 with the various medications needed for treatment and connect them simultaneously to the three-way connector. This not only saves time when changing syringes 30 but also reduces the risk of contamination during operation. At the same time, the three-way connector has excellent sealing performance, ensuring that there will be no leakage of medication or air ingress when switching syringes 30.

[0079] In one embodiment of the present invention, the negative pressure suction device 50 is connected to the fourth interface via a first connecting conduit 51, and the syringe 30 is connected to the second interface via a second connecting conduit 31.

[0080] The puncture needle connecting tube 20, saline connecting tube 40, first connecting catheter 51, and second connecting catheter 31 are all marked with different colored tapes to distinguish the uses of different tubing. These tapes are made of medical-grade colored silicone material, which has durable color retention and good biocompatibility. For example, a red tape can be used to mark the medication channel (second connecting catheter 31), a blue tape to mark the saline channel (saline connecting tube 40), a yellow tape to mark the negative pressure channel (first connecting catheter 51), and a green tape to mark the puncture needle connecting tube 20. In addition, each colored tape also has corresponding text instructions printed on it, making it easy for medical staff to quickly identify the purpose of the tubing. The design of the markings fully considers the usage habits and safety requirements in medical practice.

[0081] By employing a connecting catheter design and color-coding, this embodiment significantly improves the operational safety and ease of use of the device. Different colored markings clearly distinguish the functions of each tubing, effectively preventing the risk of misoperation. Simultaneously, the standardized catheter connection design ensures the reliability and stability of the device during use, providing healthcare personnel with safer and more intuitive operational guidance, thereby improving the efficiency and safety of clinical treatment.

[0082] Reference Figure 4 As shown, in some embodiments of this utility model, the bottom of the negative pressure suction device 50 is also provided with a drain port 502 with a drain switch for connecting a replaceable liquid collection bag. The drain switch adopts a rotary structure design, which can realize the switching from closed to open. The drain port 502 is equipped with a standardized connector for quick and reliable connection with the liquid collection bag.

[0083] The fluid collection bag is made of medical-grade transparent soft material. It features graduated markings for accurate measurement of the fluid volume. An anti-backflow valve at the inlet end effectively prevents backflow and ensures unidirectional drainage.

[0084] During actual use, when the fluid accumulated in the negative pressure suction device 50 reaches a certain volume, medical staff can quickly connect the fluid collection bag to the drain port 502. After opening the drain switch, the fluid can flow smoothly into the fluid collection bag under the action of gravity. Once the fluid collection bag is full, it can be easily replaced with a new one via the quick connector, ensuring the continuity of the drainage process. Used fluid collection bags can be sealed and disposed of properly, effectively preventing medical waste leakage and contamination.

[0085] By adding a drainage port 502 to the bottom of the negative pressure aspirator 50 and equipping it with a replaceable fluid collection bag, the practicality and convenience of the device in long-term drainage treatment are significantly improved. This design not only facilitates the collection and treatment of fluid but also ensures the continuity of the drainage process. Furthermore, the transparent fluid collection bag and graduations allow medical staff to monitor and accurately record the drainage status in real time, providing important reference data for clinical treatment.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0087] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A negative pressure drainage and drug delivery device, characterized in that, include: A four-way valve, the four-way valve having a first port, a second port, a third port and a fourth port; A puncture needle connecting tube, one end of which is connected to the first interface, and the other end of which is adapted to connect to a puncture needle; A syringe connected to the second interface for injecting a drug solution into the affected area; A saline connecting tube, one end of which is connected to the third interface, and the other end of which is adapted to connect to a saline bag for delivering physiological saline to the affected area. A negative pressure suction device, which is connected to the fourth interface, is used to extract the accumulated fluid from the diseased part of the body through negative pressure adsorption. The four-way valve includes a four-way component and four independently controllable switching valves. The four switching valves are respectively located on the four ports of the four-way component and are used to control the opening and closing states of the corresponding channels. The outlet end of each switching valve is connected to a Luer connector.

2. The negative pressure drainage and drug delivery device according to claim 1, characterized in that, The negative pressure suction device includes an accordion-style compression bottle and a spring. The spring is located inside the accordion-style compression bottle to stretch and restore the compressed accordion-style compression bottle.

3. The negative pressure drainage and drug delivery device according to claim 1, characterized in that, The puncture needle connecting tube is equipped with a Robert clamp for adjusting the opening of the puncture needle connecting tube.

4. The negative pressure drainage and drug delivery device according to claim 1, characterized in that, The brine connection pipe is equipped with a flow rate regulator to adjust the opening degree of the brine connection pipe.

5. The negative pressure drainage and drug delivery device according to claim 2, characterized in that, The accordion-style compression bottle is equipped with graduation lines to indicate the volume of liquid being pumped.

6. The negative pressure drainage and drug delivery device according to claim 1, characterized in that, A three-way connector is provided between the syringe and the second interface for connecting multiple syringes at different times.

7. The negative pressure drainage and drug delivery device according to claim 1, characterized in that, The negative pressure aspirator is connected to the fourth interface via a first connecting conduit, and the syringe is connected to the second interface via a second connecting conduit. The puncture needle connecting tube, saline connecting tube, first connecting catheter, and second connecting catheter are all marked with different colored strips to distinguish the purpose of different tubes.

8. The negative pressure drainage and drug delivery device according to claim 1, characterized in that, The bottom of the negative pressure suction device is also equipped with a drain port with a drain switch for connecting a replaceable liquid collection bag.

Images