Negative pressure drainage structure used after auricle reconstruction

Abstract

The negative pressure drainage structure comprises an injection push rod, an injection cylinder and a three-way reversing valve, one end of the injection push rod is movably connected with the injection cylinder, one end of the three-way reversing valve is communicated with one end of the injection cylinder in a sealed mode, and the other end of the three-way reversing valve is communicated with a pressure sensor in a sealed mode. One end of the pressure sensor is hermetically communicated with a drainage catheter; the negative pressure drainage structure is provided with the pressure sensor, one side of the pressure sensor is provided with the multi-color LED alarm lamp, and when the pressure sensor senses that the negative pressure in the drainage catheter fails, the multi-color LED alarm lamp flickers to give an alarm, so that medical workers are reminded to adjust the negative pressure in time, and it is ensured that the negative pressure drainage process is safe and effective; in addition, through the simplified design of the clamping block assembly and the limiting clamping groove, the injection push rod is effectively limited, meanwhile, operation of medical staff can be facilitated, and the effect of simplifying the drainage operation process is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical care equipment, and in particular to a negative pressure drainage structure used after auricle reconstruction surgery. Background Art

[0002] Congenital microtia is one of the most common congenital malformations. Patients need to undergo total ear reconstruction to "regain ears". After the operation, a negative pressure drainage device is needed to use continuous negative pressure suction to make the skin flap evenly adhere to the surface of the cartilage scaffold, and to promptly absorb the exuded blood and tissue fluid to avoid the formation of dead space and the subsequent subcutaneous effusion, scaffold exposure or structural ambiguity. The existing negative pressure drainage device is mainly composed of a syringe, a syringe push rod, a homemade limit assembly and a scalp needle hose. Negative pressure is generated inside the syringe by pulling the syringe push rod, and the limit assembly is arranged between the syringe push rod and the syringe to maintain the negative pressure inside the syringe.

[0003] The existing negative pressure drainage devices still have some defects, and some practical functions need to be improved. For example, the existing negative pressure drainage devices lack the corresponding negative pressure detection function, and cannot clearly and intuitively know the negative pressure situation inside the syringe. Medical staff need to conduct regular patrols and inspections to determine whether the negative pressure is normal, which greatly increases the clinical workload; in addition, since most of the existing negative pressure drainage devices are non-integrated structural designs, and the structure of the limiting components used in the negative pressure drainage devices is relatively complex, it is difficult and inconvenient for one person to operate them. The limiting components are easily slipped due to human factors and cannot play their limiting role, thereby causing the negative pressure inside the syringe to fail and then the exudate to flow back. Summary of the Invention

[0004] In order to solve the problems arising from the above-mentioned background technology, the purpose of the present invention is to provide a negative pressure drainage structure for use after auricle reconstruction surgery. By adding a pressure sensor to the negative pressure drainage structure, and providing a multi-color LED alarm light on one side of the pressure sensor, when the pressure sensor senses that the negative pressure inside the drainage catheter has failed, the multi-color LED alarm light flashes to warn medical staff to adjust the negative pressure in time to ensure the safety and effectiveness of negative pressure drainage; in addition, through the simple structural design of the block assembly and the limiting slot, effective limiting of the injection push rod is achieved, which not only makes the drainage operation convenient, but also can accurately control the negative pressure inside the syringe.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The utility model provides a kind of negative pressure drainage structure for auricle reconstruction, the negative pressure drainage structure includes injection push rod, injection cylinder, three-way reversing valve, one end of the injection push rod is movably connected with injection cylinder, one end of the three-way reversing valve is sealed with the one end of injection cylinder, another end of the three-way reversing valve is sealed with pressure sensor, one end of the pressure sensor is sealed with drainage catheter, one side of the pressure sensor is provided with multicolor LED alarm lamp, the bottom surface of the injection cylinder is provided with the block assembly that can be manually rotated, the rod body position of the injection push rod is equidistantly provided with several limit clamping slots matched with the block assembly, the limit of the injection push rod is realized by the cooperation of the block assembly and the limit clamping slot.

[0007] Further, the block assembly includes a first block assembly and a second block assembly, the first block assembly and the second block assembly are symmetrically arranged, the first block assembly includes a first fixing member and a first rotatable block, the first fixing member is fixedly arranged on the bottom surface of the injection cylinder, one end of the first rotatable block is movably connected to the first fixing member, and one end of the first rotatable block is inserted into the inside of the limit clamping slot.

[0008] Further, the second block assembly includes a second fixing member and a second rotatable block, the second fixing member is fixedly arranged on the bottom surface of the injection cylinder, one end of the second rotatable block is movably connected to the second fixing member, and one end of the second rotatable block is inserted into the inside of the limit clamping slot.

[0009] Further, the three-way reversing valve includes a negative pressure connecting pipe, a side connecting pipe and a drainage connecting pipe, the three-way reversing valve is sealed with the injection cylinder through the negative pressure connecting pipe, the three-way reversing valve is sealed with the pressure sensor through the drainage connecting pipe, and one end of the side connecting pipe is sealed with a push-pull drainage valve.

[0010] Further, an intermediate connecting piece is fixedly arranged on the pipe body of the drainage connecting pipe, a first internal thread is arranged on the inner side of the intermediate connecting piece, a first external thread is arranged on the connecting end of the pressure sensor, the intermediate connecting piece and the pressure sensor are screw-connected through the cooperation of the first internal thread and the first external thread, and one end of the drainage connecting pipe is connected with the inside of the pressure sensor.

[0011] Further, a second external thread is arranged on the outer edge of the pipe body of the negative pressure connecting pipe, a second internal thread is arranged on the inner side of the top end of the injection cylinder, and the negative pressure connecting pipe and the injection cylinder are screw-connected through the cooperation of the second external thread and the second internal thread.

[0012] Further, an inner piston is fixedly arranged on one end of the injection push rod, the inner piston is movably connected to the inner side of the injection cylinder, and the injection push rod is movably connected to the injection cylinder through the inner piston.

[0013] Furthermore, one end of the drainage catheter is sealed and communicated with the pressure sensor via a Luer connector, and one end of the drainage catheter is connected to the outside.

[0014] Furthermore, the cross section of the main part of the injection push rod is cross-shaped.

[0015] The beneficial effects of the present invention are:

[0016] (1) The three-way reversing valve of the present invention is connected to a pressure sensor, and a multi-color LED alarm light is provided on one side of the pressure sensor. The exudate (such as blood and tissue fluid in the patient's reconstructed auricle) flowing through the drainage catheter will enter the pressure sensor for negative pressure detection, and then the negative pressure situation will be reflected by the flashing warning of the multi-color LED alarm light, so that medical staff can intuitively and clearly know the negative pressure situation inside the drainage catheter, so that medical staff can adjust the negative pressure in time by pulling and pushing the injection push rod. It has the advantages of saving time and effort, reducing the workload of medical staff, and at the same time eliminating the safety hazard of exudate backflow due to negative pressure failure during drainage;

[0017] (2) The present invention rotates the first rotatable block and the second rotatable block so that one end of the first rotatable block and the second rotatable block can be inserted into the interior of the limiting slot, thereby effectively limiting the injection push rod, thereby maintaining the negative pressure inside the injection barrel to facilitate the drainage operation, replacing the existing limiting component with a complex structure, and being more convenient and quick to use. It not only simplifies the drainage operation process, but also effectively ensures the smooth progress of negative pressure drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a negative pressure drainage structure used for auricle reconstruction surgery according to the present invention;

[0019] Figure 2 This is a schematic diagram of the disassembled structure of a negative pressure drainage structure used for auricle reconstruction surgery according to the present invention;

[0020] Figure 3 Schematic diagram of the first rotatable card block and the second rotatable card block being inserted into the limiting card slot in the present invention;

[0021] Figure 4 Schematic diagram of the first rotatable block and the second rotatable block when they are not twisted (left), and schematic diagram of the first rotatable block and the second rotatable block when they are twisted (right);

[0022] Figure 5 This is a flowchart of the operation of the electronic components inside the pressure sensor of the present invention.

[0023] In the figure, 1 is an injection push rod, 2 is a syringe, 201 is a second internal thread, 3 is a three-way reversing valve, 301 is a negative pressure pipe, 3011 is a second external thread, 302 is a side pipe, 303 is a drainage pipe, 4 is a pressure sensor, 401 is a first external thread, 402 is a multi-color LED warning light, 5 is a block assembly, 501 is a first block assembly, 5011 is a first fixing part, 5012 is a first rotatable block, 502 is a second block assembly, 5021 is a second fixing part, 5022 is a second rotatable block, 6 is a limiting slot, 7 is a drainage catheter, 8 is an intermediate connecting part, 801 is a first internal thread, 9 is an inner piston, 10 is a Luer connector, and 11 is a push-pull drainage valve. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] As attached Figure 1-5 As shown, in an embodiment of the present invention, a negative pressure drainage structure for post-auricular reconstruction surgery is provided, the negative pressure drainage structure comprising an injection push rod 1, a syringe 2, and a three-way reversing valve 3. One end of the injection push rod 1 is movably connected to the syringe 2, one end of the three-way reversing valve 3 is sealed and connected to one end of the syringe 2, the other end of the three-way reversing valve 3 is sealed and connected to a pressure sensor 4, one end of the pressure sensor 4 is sealed and connected to a drainage catheter 7, a multi-color LED alarm light 402 is provided on one side of the pressure sensor 4, a manually rotatable block assembly 5 is provided on the bottom surface of the syringe 2, a plurality of limit slots 6 that cooperate with the block assembly 5 are equidistantly provided on the rod body of the injection push rod 1, and the injection push rod 1 is limited by the cooperation of the block assembly 5 and the limit slot 6.

[0026] Specifically, the pressure sensor 4 is a medical-grade isolated pressure sensor. The interior of the pressure sensor 4 is also provided with an isolation diaphragm, filling oil and oil cavity, MEMS piezoresistive chip, ASIC signal processor, voltage comparator and LED drive circuit. The above-mentioned filling oil and oil cavity, MEMS piezoresistive chip, ASIC signal processor, voltage comparator and LED drive circuit all cooperate and operate in a laser-welded sealed cavity inside the pressure sensor 4 to ensure zero contact with the exudate.

[0027] The card block assembly 5 of the application comprises a first card block assembly 501 and a second card block assembly 502, both of which are symmetrically arranged, the first card block assembly 501 comprises a first fixing piece 5011 and a first rotatable card block 5012, the first fixing piece 5011 is fixedly arranged on the bottom surface of the syringe 2, one end of the first rotatable card block 5012 is movably connected to the first fixing piece 5011, and the other end of the first rotatable card block 5012 is inserted into the inside of the limiting card slot 6.

[0028] The second card block assembly 502 of the application comprises a second fixing piece 5021 and a second rotatable card block 5022, the second fixing piece 5021 is fixedly arranged on the bottom surface of the syringe 2, one end of the second rotatable card block 5022 is movably connected to the second fixing piece 5021, and the other end of the second rotatable card block 5022 is inserted into the inside of the limiting card slot 6.

[0029] In the specific implementation of the application, the medical staff pulls the injection push rod 1 to make the exudate in the reconstructed auricle of the patient flow through the drainage catheter 7 into the inside of the pressure sensor 4, the exudate contacts the isolation diaphragm in the inside of the pressure sensor 4, the isolation diaphragm is deformed under pressure to extrude the filling oil in the inside of the pressure sensor 4, the filling oil further transmits the pressure to the MEMS piezoresistive chip in direct contact with the oil cavity, the Wheatstone bridge on the MEMS piezoresistive chip outputs a micro-voltage signal due to the piezoresistive effect, the micro-voltage signal is converted into a standard voltage signal after temperature compensation, non-linear correction and amplification by the ASIC signal processor, then the standard voltage signal is input to the voltage comparator, the voltage comparator compares the standard voltage signal with the preset threshold value in real time, if the voltage value is less than the minimum value of the preset threshold value interval, it is determined that there is a risk of overpressure, at this time, the LED driving circuit receives the electrical signal from the voltage comparator and converts it into a constant current output current, and the multi-color LED alarm lamp 402 flashes red light; if the voltage value is greater than the maximum value of the preset threshold value interval, it is determined that there is not enough negative pressure, and the multi-color LED alarm lamp 402 flashes yellow light; if the voltage value is in the preset threshold value interval, it is determined that the negative pressure is normal, and the multi-color LED alarm lamp 402 is always green; through the multi-color LED alarm lamp 402 on the pressure sensor 4, the medical staff can intuitively and clearly know the accurate negative pressure condition in the inside of the syringe 2, and the exudate of the patient only contacts the isolation diaphragm throughout the process, and the exudate of the patient flows through the pressure sensor 4 and finally enters the inside of the syringe 2 for storage;

[0030] When the present invention is implemented, medical staff can adjust the negative pressure inside the syringe 2 or pour out the exudate stored in the syringe 2 through the push-pull drainage valve 11 at one end of the side pipe 302. When the medical staff needs to limit the position of the injection push rod 1 to maintain the negative pressure inside the syringe 2, they only need to twist the first rotatable block 5012 and the second rotatable block 5022 so that the two are inserted into the limiting slot 6 of the injection push rod 1. The first rotatable block 5012 and the second rotatable block 5022 can be inserted into the limiting slot 6 or detached from the limiting slot 6 very conveniently and quickly, which simplifies the drainage operation process to a certain extent.

[0031] The three-way reversing valve 3 of the present invention includes a negative pressure pipe 301, a side pipe 302, and a drainage pipe 303. The three-way reversing valve 3 is sealedly connected to the injection cylinder 2 through the negative pressure pipe 301, and the three-way reversing valve 3 is sealedly connected to the pressure sensor 4 through the drainage pipe 303. One end of the side pipe 302 is sealedly connected to the push-pull drainage valve 11.

[0032] Specifically, the working principle of the push-pull drainage valve 11 is a mechanical shut-off mechanism based on linear sliding. By manually pushing or pulling the external slider of the push-pull drainage valve 11, the displacement of its internal baffle is directly controlled to realize the physical opening and closing of its internal flow channel; by pushing the external slider of the push-pull drainage valve 11, the internal baffle is displaced and temporarily stops blocking its internal flow channel, so that the internal flow channel of the push-pull drainage valve 11 is temporarily connected to the outside, so that the three-way reversing valve 3 is temporarily connected to the outside through the side pipe 302 and the push-pull drainage valve 11, thereby adjusting the negative pressure inside the syringe 2 or pouring out the exudate stored in the syringe 2. In addition, the external slider of the push-pull drainage valve 11 can be pushed and reset to re-isolate the push-pull drainage valve 11 from the outside. The push-pull drainage valve 11 has the characteristics of no need to remove the cap, anti-backflow and one-hand controllable, and at the same time has good safety, high operating efficiency and excellent anti-pollution performance.

[0033] Specifically, the push-pull diversion valve 11 and the side pipe 302 are connected through threaded sealing.

[0034] The drainage pipe 303 of the present invention is fixedly sleeved with an intermediate connecting piece 8 on its tube body, a first internal thread 801 is provided on the inner side of the intermediate connecting piece 8, and a first external thread 401 is provided on the outer edge of the connecting end of the pressure sensor 4. The intermediate connecting piece 8 and the pressure sensor 4 are connected with each other through the matching spirals of the first internal thread 801 and the first external thread 401, and one end of the drainage pipe 303 is connected with the interior of the pressure sensor 4.

[0035] The outer edge of the tube body of the negative pressure connecting pipe 301 of the present invention is provided with a second external thread 3011, and the inner side of the top end of the injection barrel 2 is provided with a second internal thread 201. The negative pressure connecting pipe 301 and the injection barrel 2 are connected by the matching spirals of the second external thread 3011 and the second internal thread 201.

[0036] An inner piston 9 is fixedly provided at one end of the injection push rod 1 of the present invention. The inner piston 9 is movably connected to the inner side of the injection barrel 2 . The injection push rod 1 is movably connected to the injection barrel 2 via the inner piston 9 .

[0037] One end of the drainage catheter 7 of the present invention is sealedly connected to the pressure sensor 4 through the Luer connector 10, and one end of the drainage catheter 7 is connected to the outside.

[0038] Specifically, the Luer connector 10 can effectively prevent leakage of exudate, and also has the advantages of easy and quick operation and strong compatibility. In addition, the sealing between the Luer connector 10 and the pressure sensor 4 can be enhanced by an externally provided sealing tape.

[0039] Specifically, the length of the drainage catheter 7 can be adjusted according to actual conditions.

[0040] The cross section of the main portion of the injection plunger 1 of the present invention is cross-shaped.

[0041] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A negative pressure drainage structure for use after auricle reconstruction surgery, comprising an injection push rod, a syringe, and a three-way reversing valve, characterized in that: One end of the injection push rod is movably connected to the injection barrel, one end of the three-way reversing valve is sealed and connected to one end of the injection barrel, the other end of the three-way reversing valve is sealed and connected to a pressure sensor, one end of the pressure sensor is sealed and connected to a drainage tube, a multi-color LED alarm light is provided on one side of the pressure sensor, and a manually rotatable block assembly is provided on the bottom surface of the injection barrel. A number of limit slots that cooperate with the block assembly are equidistantly provided on the rod body of the injection push rod, and the injection push rod is limited by the cooperation of the block assembly and the limit slots.

2. The negative pressure drainage structure for auricle reconstruction surgery according to claim 1, characterized in that: The card block assembly includes a first card block assembly and a second card block assembly, and the first card block assembly and the second card block assembly are symmetrically arranged. The first card block assembly includes a first fixing part and a first rotatable card block. The first fixing part is fixedly arranged on the bottom surface of the injection barrel, and the first rotatable card block is movably connected to one end of the first fixing part, and one end of the first rotatable card block is inserted into the interior of the limiting card slot.

3. The negative pressure drainage structure for auricle reconstruction according to claim 2, characterized in that: The second clamping block assembly includes a second fixing member and a second rotatable clamping block. The second fixing member is fixedly arranged on the bottom surface of the injection barrel. The second rotatable clamping block is movably connected to one end of the second fixing member. One end of the second rotatable clamping block is inserted into the interior of the limiting clamping slot.

4. The negative pressure drainage structure for auricle reconstruction surgery according to claim 1, characterized in that: The three-way reversing valve includes a negative pressure pipe, a side pipe, and a drainage pipe. The three-way reversing valve is sealed and connected to the injection cylinder through the negative pressure pipe. The three-way reversing valve is sealed and connected to the pressure sensor through the drainage pipe. One end of the side pipe is sealed and connected to a push-pull drainage valve.

5. The negative pressure drainage structure for use after auricle reconstruction surgery according to claim 4, characterized in that: The tube body of the drainage pipe is fixed with an intermediate connecting piece, the inner side of the intermediate connecting piece is provided with a first internal thread, the outer edge of the connecting end of the pressure sensor is provided with a first external thread, the intermediate connecting piece and the pressure sensor are connected by the matching spirals of the first internal thread and the first external thread, and one end of the drainage pipe is connected to the interior of the pressure sensor.

6. The negative pressure drainage structure for use after auricle reconstruction surgery according to claim 4, characterized in that: The outer edge of the tube body of the negative pressure connecting pipe is provided with a second external thread, and the inner side of the top end of the injection barrel is provided with a second internal thread. The negative pressure connecting pipe and the injection barrel are spirally connected through the matching second external thread and the second internal thread.

7. The negative pressure drainage structure for use after auricle reconstruction surgery according to claim 1, characterized in that: An inner piston is fixedly provided at one end of the injection push rod, and the inner piston is movably connected to the inner side of the injection barrel. The injection push rod is movably connected to the injection barrel through the inner piston.

8. The negative pressure drainage structure for use after auricle reconstruction surgery according to claim 1, characterized in that: One end of the drainage catheter is sealed and communicated with the pressure sensor through a Luer connector, and one end of the drainage catheter is connected to the outside.

9. The negative pressure drainage structure for use after auricle reconstruction surgery according to claim 1, characterized in that: The cross section of the main part of the injection push rod is cross-shaped.

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