A surgical drain with pressure monitoring function

Abstract

The present invention relates to the field of medical drainage technology. The purpose is to provide a surgical drain with a pressure monitoring function, including a negative pressure cup, a liquid collecting cup and a drainage tube, wherein the outlet of the negative pressure cup is provided with a first connecting pipe for connecting with the negative pressure drain, the inlet of the negative pressure cup is connected with the outlet of the liquid collecting cup through a second connecting pipe, and the inlet of the liquid collecting cup is connected with the drainage tube; an annular baffle is provided on the inner wall of the middle section of the negative pressure cup, and a negative pressure adjustment mechanism is provided in the negative pressure cup, and the negative pressure adjustment mechanism includes an adjustment piston provided above the baffle and matched with the negative pressure cup; a base is provided in the negative pressure cup below the adjustment piston, and the base and the adjustment piston are connected by an elastic member. The present invention can adaptively adjust the excessive negative pressure in the negative pressure cup, and in the event of blockage, it can alleviate the phenomenon of rapid rise of negative pressure in the negative pressure cup, thereby ensuring the stability and safety of negative pressure suction.

Description

Technical Field

[0001] The present invention relates to the technical field of medical drainage, and in particular to a surgical drain with a pressure monitoring function. Background Art

[0002] Negative pressure drainage device is an auxiliary device widely used in surgical operations. It can help doctors drain the patient's body of accumulated fluid, flushing fluid and other waste fluids by means of negative pressure suction. It usually includes a negative pressure generator, a negative pressure cup and a fluid collection cup connected to the negative pressure generator through pipelines in sequence, and the fluid collection cup is connected to the drainage tube. When in use, the negative pressure generator forms a stable negative pressure in the negative pressure cup through suction, and the negative pressure is transmitted to the fluid collection cup, so that the fluid collection cup generates suction, thereby using the drainage tube to drain the patient's body of waste fluid.

[0003] However, since the drained waste liquid often contains flocculent viscous liquid, it is easy to cause blockage. Once blockage occurs, the gas in the negative pressure cup cannot be replenished in time, which will cause the negative pressure in the negative pressure cup to continue to increase, posing certain hidden dangers. The common problem with the negative pressure drainer currently used is that the negative pressure value of the negative pressure cup cannot be adjusted in real time according to the blockage situation. It is generally necessary to set an air pressure sensor in the negative pressure cup, and adjust the pressure in the negative pressure cup through the linkage between the air pressure sensor and the negative pressure generator. However, this method not only has higher requirements on the adjustment response speed of the negative pressure generator, but also with the higher functional requirements for the negative pressure generator, the overall equipment cost is also greatly increased. In addition, the drainage tube used in the existing drain is usually an ordinary rubber hose, which has a greater risk of blockage and does not have the function of self-dredging, which also affects the normal use of the drain. Summary of the invention

[0004] The object of the present invention is to provide a surgical drain with a pressure monitoring function and capable of realizing automatic pressure adjustment.

[0005] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is a surgical drain with a pressure monitoring function, comprising a negative pressure cup, a liquid collecting cup and a drainage tube, wherein the outlet of the negative pressure cup is provided with a first connecting pipe for connecting with the negative pressure drain, the inlet of the negative pressure cup is connected with the outlet of the liquid collecting cup through a second connecting pipe, and the inlet of the liquid collecting cup is connected with the drainage tube;

[0006] An annular baffle is arranged on the inner wall of the middle section of the negative pressure cup, and a negative pressure adjusting mechanism is arranged in the negative pressure cup, and the negative pressure adjusting mechanism includes an adjusting piston arranged above the baffle and matched with the negative pressure cup; a base is arranged in the negative pressure cup below the adjusting piston, and the base and the adjusting piston are connected by an elastic member; a center rod is also arranged on the top of the adjusting piston, and the center rod passes through the center hole on the cup cover of the negative pressure cup and forms a sliding fit with the cup cover of the negative pressure cup; a bottom hole is arranged at the bottom of the center rod, and an air supply hole is arranged on the side wall of the middle section of the center rod, and the air supply hole is connected to the bottom hole.

[0007] Preferably, the elastic member is a coil spring.

[0008] Preferably, the air supplement hole is a strip-shaped hole arranged on the side wall of the center rod and extending along the length direction of the center rod.

[0009] Preferably, the base is a sliding cap, which is installed in the lower part of the negative pressure cup and forms a sliding fit with the negative pressure cup; the sliding cap can form height adjustment in the negative pressure cup under the control of the adjustment component.

[0010] Preferably, two adjustment openings extending vertically are arranged on the side wall of the lower part of the negative pressure cup, and adjustment plates cooperating with the adjustment openings are arranged on both sides of the sliding cap, and the adjustment plates are clamped in the adjustment openings.

[0011] Preferably, the adjustment assembly includes an adjustment rod fixedly arranged at the lower part of one side of the negative pressure cup, and the position of the adjustment rod is opposite to the adjustment plate on one side of the sliding cap; the adjustment plate is sleeved outside the adjustment rod, and a support spring is arranged between the bottom of the adjustment rod and the bottom surface of the adjustment plate, and the adjustment plate is pressed against the support spring through an adjustment nut, and the adjustment nut and the adjustment rod form a threaded fit.

[0012] Preferably, a pressure sensor for monitoring the air pressure in the negative pressure cup is disposed on the inner surface of the cup cover of the negative pressure cup, and the pressure sensor is connected to a display disposed on the surface of the cup cover.

[0013] Preferably, the drainage tube includes a main tube, a plurality of side tubes are evenly distributed on the side wall of the main tube, both ends of the side tubes are connected to the main tube, and a self-adjusting valve is provided at one end of the side tube close to the liquid collecting cup, the root end of the self-adjusting valve is located on the side of the junction of the main tube and the side tube away from the liquid collecting cup, and the free end of the self-adjusting valve is located on the side of the junction of the main tube and the side tube close to the liquid collecting cup.

[0014] Preferably, two adjacent side tubes are staggeredly distributed on both sides of the main tube, and the head end of one side tube is just opposite to the tail end of the other side tube.

[0015] Preferably, the side tube and the main tube are both elastic rubber tubes.

[0016] The beneficial effects of the present invention are concentrated in: being able to adaptively adjust the excessive negative pressure in the negative pressure cup, and in the event of blockage, being able to alleviate the phenomenon of rapid rise of negative pressure in the negative pressure cup, thereby ensuring the stability and safety of negative pressure suction. Specifically, during use, the present invention connects the first connecting pipe to the negative pressure generator, and inserts the drainage tube into the part to be drained, and then normal drainage can be performed. When blockage occurs, as the pressure in the negative pressure cup continues to decrease, the adjustment piston is continuously pressed upward under atmospheric pressure, and at this time, the elastic member is continuously stretched, accumulating rebound potential energy; as the adjustment piston rises, its air replenishment hole passes through the center hole and is connected to the outside atmosphere. The outside atmosphere is replenished into the negative pressure cup through the air replenishment hole and the bottom hole. As the outside atmosphere is replenished, the adjustment piston can be reset under the action of the elastic member. Through the above design, the present invention can effectively avoid the situation of excessive negative pressure in the negative pressure cup, and ensure effective monitoring of the pressure in the negative pressure cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 is a schematic diagram of the structure of the drainage tube;

[0019] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0020] Figure 4 for Figure 3 Schematic diagram of the structure shown in the blocked state. DETAILED DESCRIPTION

[0021] like Figure 1-4 As shown, a surgical drain with a pressure monitoring function includes a negative pressure cup 1, a liquid collecting cup 2 and a drainage tube 3. The outlet of the negative pressure cup 1 is provided with a first connecting pipe 4 for connecting to the negative pressure drain. The inlet of the negative pressure cup 1 is connected to the outlet of the liquid collecting cup 2 through a second connecting pipe 5. The inlet of the liquid collecting cup 2 is connected to the drainage tube 3. The overall connection form here is generally equivalent to that of the existing negative pressure drain and will not be repeated in the present invention.

[0022] Compared with the existing surgical negative pressure drain, the biggest difference of the present invention is that it has an automatic adjustment function for excessive negative pressure in the negative pressure cup 1. Figure 1 As shown in the figure, an annular stopper 6 is arranged on the inner wall of the middle section of the negative pressure cup 1, and a negative pressure adjustment mechanism is arranged in the negative pressure cup 1. The negative pressure adjustment mechanism includes an adjustment piston 7 arranged above the stopper 6 and matched with the negative pressure cup 1, and the adjustment piston 7 can move up and down in the negative pressure cup 1. When the negative pressure value in the negative pressure cup 1 is lower than the predetermined threshold value, it moves upward, otherwise it can reset downward.

[0023] In order to achieve the above-mentioned stroke, a base is provided in the negative pressure cup 1 below the adjusting piston 7, and the base is connected to the adjusting piston 7 through an elastic member, which is generally a coil spring 12. Of course, it is also feasible to use simple components such as elastic rubber bands as elastic members. A center rod 8 is also provided on the top of the adjusting piston 7, and the center rod 8 passes through the center hole 9 on the cup cover of the negative pressure cup 1 and forms a sliding fit with the cup cover of the negative pressure cup 1. A bottom hole 10 is provided at the bottom of the center rod 8, and an air supplement hole 11 is provided on the side wall of the middle section of the center rod 8, and the air supplement hole 11 is connected to the bottom hole 10.

[0024] During use of the present invention, the first connecting pipe 4 is connected to the negative pressure generator, and the drainage tube 3 is inserted into the part to be drained, and normal drainage can be performed. When blockage occurs, as the pressure in the negative pressure cup 1 continues to decrease, the adjusting piston 7 is continuously pressed upward under atmospheric pressure. At this time, the elastic member is continuously stretched to accumulate rebound potential energy; as the adjusting piston 7 rises, its air replenishment hole 11 passes through the center hole 9 and is connected to the outside atmosphere. The outside atmosphere is replenished into the inside of the negative pressure cup 1 through the air replenishment hole 11 and the bottom hole 10. As the outside atmosphere is replenished, the adjusting piston 7 can be reset under the action of the elastic member. Through the above design, the present invention can effectively avoid the situation of excessive negative pressure in the negative pressure cup 1, and ensure the effective monitoring of the pressure in the negative pressure cup 1.

[0025] The negative pressure condition in the negative pressure cup 1 can also be reflected by the extended length of the center rod 8. Of course, in order to present the negative pressure in the negative pressure cup 1 more intuitively, the present invention can also be that the inner surface of the cup cover of the negative pressure cup 1 is provided with a pressure sensor 19 for monitoring the air pressure in the negative pressure cup 1, and the pressure sensor 19 is connected to a display 20 arranged on the surface of the cup cover.

[0026] The air supplement hole 11 of the present invention can be a circular hole, but a better approach is that the air supplement hole 11 is a strip hole provided on the side wall of the center rod 8 and extending along the length direction of the center rod 8. As the strip hole penetrates the center hole 9 for a longer distance, the instantaneous air supplement amount is larger, and a faster response speed can be achieved.

[0027] The base of the present invention can be a fixed base, but in this way, the adjustment range that the adjustment piston 7 can achieve is mainly related to the elasticity of the elastic member. In order to achieve a larger adjustment range, the base of the present invention can also be a movable base, that is, it can be raised and lowered in the negative pressure cup 1, thereby increasing or reducing the initial elastic amount of the elastic member. Figure 1As shown in the figure, the base is a sliding cap 13, and the sliding cap 13 is installed in the lower part of the negative pressure cup 1 and forms a sliding fit with the negative pressure cup 1. The sliding cap 13 can form an adjustment of the height position in the negative pressure cup 1 under the control of the adjustment component. Regarding its installation method, as shown in the figure, two adjustment ports 14 extending vertically are provided on the side wall of the lower part of the negative pressure cup 1, and adjustment plates 15 matching the adjustment ports 14 are provided on both sides of the sliding cap 13, and the adjustment plates 15 are clamped in the adjustment ports 14. Of course, it is also feasible to adopt other forms of sliding fit under the condition of meeting the adjustment requirements.

[0028] When the adjustment port 14 is matched with the adjustment sheet 15, the adjustment assembly of the present invention may include an adjustment vertical rod 16 fixedly arranged at the lower part of one side of the negative pressure cup 1, and the position of the adjustment vertical rod 16 is opposite to the adjustment sheet 15 on one side of the sliding cap 13. The adjustment sheet 15 is sleeved outside the adjustment vertical rod 16, and a support spring 17 is arranged between the bottom of the adjustment vertical rod 16 and the bottom surface of the adjustment sheet 15. The adjustment sheet 15 is pressed against the support spring 17 through the adjustment nut 18, and the adjustment nut 18 and the adjustment vertical rod 16 form a threaded fit. The sliding cap 13 of the present invention always keeps the contact between the adjustment sheet 15 and the adjustment nut 18 under the action of the support spring 17. When in use, the height of the adjustment sheet 15 can be changed by rotating the adjustment nut 18, thereby changing the height of the sliding cap 13.

[0029] In addition, in order to further solve the problem of blockage of the drainage tube 3, the present invention also discloses a self-dredging anti-blocking drainage tube, which has a structural form as follows: Figure 2-4 As shown in the figure, the drainage tube 3 includes a main tube 21, and a plurality of side tubes 22 are evenly distributed on the side wall of the main tube 21, both ends of the side tubes 22 are connected to the main tube 21, and a self-adjusting valve 23 is provided at one end of the side tube 22 close to the liquid collecting cup 2, the root end of the self-adjusting valve 23 is located at the side of the junction of the main tube 21 and the side tube 22 away from the liquid collecting cup 2, and the free end of the self-adjusting valve 23 is located at the side of the junction of the main tube 21 and the side tube 22 close to the liquid collecting cup 2.

[0030] Under normal use, that is, when no blockage occurs, Figure 3 As shown in FIG. 1 , the waste liquid is normally drained through the main pipe 21. When a part of the main pipe 21 is blocked, the self-adjusting valve 23 of the side pipe 22 on the corresponding section of the main pipe 21 is opened, and the drainage form is as follows: Figure 4As shown in the figure, the waste liquid is drained through the side pipe 22. At the same time, during the drainage process, the side pipe 22 can also pull the blocked part forward and backward to tear and disperse the large pieces of viscous accumulated liquid into smaller particles, so as to achieve rapid dredging of the blocked part. After the main pipe 22 is unblocked, the self-adjusting valve 23 can be reset under the action of its own elastic force and the flushing action of the liquid flow to perform conventional drainage.

[0031] The side tubes 22 of the present invention can be arranged at intervals on the main tube 21, but a better approach is that two adjacent side tubes 22 are staggered on both sides of the main tube 21, and the head end of one side tube 22 is just opposite to the tail end of the other side tube 22. In this way, the entire main tube 21 can be fully covered. The side tubes 22 and the main tube 21 are both elastic hoses. When a blockage occurs, simply pinching the blocked part can also play a role in clearing it, and due to the existence of the side tubes 22, the elastic recovery ability of the entire drainage tube 3 is extremely strong.

Claims

1. A surgical drain with a pressure monitoring function, comprising a negative pressure cup (1), a liquid collecting cup (2) and a drainage tube (3), wherein the outlet of the negative pressure cup (1) is provided with a first connecting pipe (4) for connecting to the negative pressure drain, the inlet of the negative pressure cup (1) is connected to the outlet of the liquid collecting cup (2) via a second connecting pipe (5), and the inlet of the liquid collecting cup (2) is connected to the drainage tube (3); Features: An annular baffle (6) is arranged on the inner wall of the middle section of the negative pressure cup (1), and a negative pressure adjustment mechanism is arranged in the negative pressure cup (1), and the negative pressure adjustment mechanism includes an adjustment piston (7) arranged above the baffle (6) and matched with the negative pressure cup (1); a base is arranged in the negative pressure cup (1) below the adjustment piston (7), and the base and the adjustment piston (7) are connected by an elastic member; a center rod (8) is also arranged on the top of the adjustment piston (7), and the center rod (8) passes through the center hole (9) located on the cup cover of the negative pressure cup (1) and forms a sliding fit with the cup cover of the negative pressure cup (1); a bottom hole (10) is arranged at the bottom of the center rod (8), and an air replenishing hole (11) is arranged on the side wall of the middle section of the center rod (8), and the air replenishing hole (11) is connected to the bottom hole (10); The drainage tube (3) comprises a main tube (21), a plurality of side tubes (22) are evenly distributed on the side wall of the main tube (21), both ends of the side tubes (22) are in communication with the main tube (21), and a self-adjusting flap (23) is provided at one end of the side tube (22) close to the liquid collecting cup (2), the root end of the self-adjusting flap (23) is located at a side of the junction of the main tube (21) and the side tube (22) away from the liquid collecting cup (2), and the free end of the self-adjusting flap (23) is located at a side of the junction of the main tube (21) and the side tube (22) close to the liquid collecting cup (2); Two adjacent side tubes (22) are staggeredly distributed on both sides of the main tube (21), and the head end of one side tube (22) is exactly opposite to the tail end of the other side tube (22); The side pipe (22) and the main pipe (21) are both elastic rubber hoses.

2. The surgical drain with pressure monitoring function according to claim 1, characterized in that: The elastic member is a coil spring (12).

3. The surgical drain with pressure monitoring function according to claim 2, characterized in that: The air supply hole (11) is a strip-shaped hole arranged on the side wall of the center rod (8) and extending along the length direction of the center rod (8).

4. The surgical drain with pressure monitoring function according to claim 3, characterized in that: The base is a sliding cap (13), which is installed in the lower part of the negative pressure cup (1) and forms a sliding fit with the negative pressure cup (1); the sliding cap (13) can adjust the height position in the negative pressure cup (1) under the control of the adjustment component.

5. The surgical drain with pressure monitoring function according to claim 4, characterized in that: Two vertically extending adjustment openings (14) are provided on the side wall of the lower part of the negative pressure cup (1), and adjustment plates (15) matching with the adjustment openings (14) are provided on both sides of the sliding cap (13), and the adjustment plates (15) are clamped in the adjustment openings (14).

6. The surgical drain with pressure monitoring function according to claim 5, characterized in that: The adjustment assembly comprises an adjustment rod (16) fixedly arranged at the lower part of one side of the negative pressure cup (1), the position of the adjustment rod (16) being opposite to the adjustment plate (15) on one side of the sliding cap (13); the adjustment plate (15) is sleeved outside the adjustment rod (16), a support spring (17) is arranged between the bottom of the adjustment rod (16) and the bottom surface of the adjustment plate (15), the adjustment plate (15) is pressed against the support spring (17) through an adjustment nut (18), and the adjustment nut (18) and the adjustment rod (16) form a threaded fit.

7. The surgical drain with pressure monitoring function according to claim 6, characterized in that: A pressure sensor (19) for monitoring the air pressure in the negative pressure cup (1) is arranged on the inner surface of the cup cover of the negative pressure cup (1); the pressure sensor (19) is connected to a display (20) arranged on the surface of the cup cover.

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