CN211325223U - Constant pressure and adjustable discharge system for endoscopic surgery - Google Patents

Abstract

The utility model discloses an laparoscopic surgery constant voltage and adjustable discharge system, including aspirator, control tube, waste liquid receiving flask and pressure regulation bottle, be provided with liquid in the pressure regulation bottle, the upper end of control tube and the one end intercommunication of waste liquid receiving flask upside, the other end and the aspirator intercommunication of waste liquid receiving flask upside, the lower extreme of control tube extends to in the pressure regulation bottle, and pressure regulation bottle upside is provided with the negative pressure interface, but liquid and control tube in the pressure regulation bottle set up to relative movement, be provided with the inside and outside breather valve of intercommunication on the pressure regulation bottle. The utility model can freely convert active suction and passive discharge; the discharge speed and the pressure in the abdominal cavity are stable, and the convenient and visual adjustment of the operator can be achieved, so that the defect that the existing aspirator is applied in the endoscopic surgery is greatly overcome, and the aspirator is more convenient and safer.

Description

Constant pressure and adjustable discharge system for endoscopic surgery

Technical Field

The utility model relates to the field of medical surgical instruments, concretely relates to endoscopic surgery constant voltage and adjustable discharge system.

Background

In minimally invasive surgery, it is often necessary to fill a closed body cavity with carbon dioxide gas at a positive pressure to create a space for the surgical procedure. In the surgical procedure, the suction system is often required to suck various liquids such as blood, body fluid and the like and exhaust smoke generated by energy devices (such as an electric hook, an ultrasonic knife and the like), so that the clear surgical field is ensured.

However, the existing suction system for endoscopic (including laparoscope, thoracoscope and inflatable mediastinoscope) operation has the following defects: (1) the conventional negative pressure suction system in an operating room can rapidly pump out carbon dioxide gas filled in a body cavity while sucking liquid and discharging smoke, so that the operation space is immediately reduced or even disappears when the gas is filled, the operation must be stopped, and the operation can be continued only when the carbon dioxide gas is filled again to reach the specified pressure and the operation space is expanded; (2) suction and smoke exhaust can not be continuously and effectively carried out, liquid at an operation part is accumulated, and a lens is shielded by smoke, so that the operation visual field is not clear; (3) when in use, the pressure in the body cavity can not be regulated and controlled, and the change is severe. The above defects result in the insurmountable continuity and safety of the operation.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a constant voltage of laparoscopic surgery and adjustable discharge system. The device can utilize a positive pressure ventilation system of the endoscope to provide power to realize passive discharge, and utilizes the depth of the discharge pipe in liquid to control the pressure and the discharge speed, thereby achieving relatively stable body cavity pressure and effectively discharging smoke or blood and other liquid according to the actual condition requirement in the operation; the suction can also be converted into a common negative pressure suction state, and the active suction is realized by utilizing the pressure of the central negative pressure.

For solving the technical problem, the utility model provides a technical scheme is a constant voltage of laparoscopic surgery and adjustable discharge system, including aspirator, control tube, waste liquid receiving flask and pressure regulation bottle, be provided with liquid in the pressure regulation bottle, the upper end of control tube with the one end intercommunication of waste liquid receiving flask upside, the other end of waste liquid receiving flask upside with the aspirator intercommunication, the lower extreme of control tube extends to in the pressure regulation bottle, pressure regulation bottle upside is provided with the negative pressure interface, but liquid and control tube in the pressure regulation bottle set up to relative movement, be provided with the inside and outside breather valve of intercommunication on the pressure regulation bottle.

Further, be provided with the flexible actuating mechanism of control tube on the pressure regulation bottle, the flexible actuating mechanism of control tube includes sleeve pipe, motor and rubber wheel, the sleeve pipe with pressure regulation bottle rigid coupling, just the sleeve pipe lower extreme with the sealed sliding connection of upper end of control tube, the upper end with the one end intercommunication of waste liquid collecting bottle upside, the rubber wheel laminating sets up the both sides of control tube, and one of them rubber wheel passes through motor drive and make the control tube business turn over liquid.

Furthermore, the circumference of the rubber wheel is provided with an annular groove matched with the adjusting pipe.

Furthermore, an installation cavity is further formed in the pressure adjusting bottle, a sliding connection hole is formed in the bottom of the installation cavity, the lower end of the adjusting pipe is in sealing sliding connection with the sliding connection hole, and the motor is fixedly connected into the installation cavity.

Furthermore, a liquid level adjusting mechanism is arranged on the pressure adjusting bottle and comprises a sliding sleeve and a piston, the lower end of the sliding sleeve extends towards the bottom of the pressure adjusting bottle, and the piston slides up and down along the sliding sleeve to enable the liquid level of the liquid in the pressure adjusting bottle to rise or fall.

Further, liquid level adjustment mechanism still includes the solenoid valve and sets up the spring in the slip joint cover pipe, the one end of spring with the top of slip joint cover pipe is connected, the other end with the piston is connected, the top of slip joint cover pipe is provided with the malleation interface, the malleation interface with the solenoid valve is connected.

Furthermore, a filter is installed on the upper side of the negative pressure adjusting bottle, the negative pressure port is arranged on the filter, and a replaceable filter element is arranged in the filter.

Furthermore, the device also comprises a base, and one end of the base is connected with a power adapter.

Furthermore, a mode switching button for controlling the vent valve and a pressure balance adjusting button for controlling the relative position of the adjusting pipe and the liquid are arranged on the suction apparatus, and the suction end of the suction apparatus is of a spherical structure with a plurality of suction holes uniformly distributed.

Further, the pressure regulating bottle comprises a regulating bottle body and a regulating bottle cap which are mutually pivoted, the waste liquid collecting bottle comprises a collecting bottle body and a collecting bottle cap which are mutually pivoted, the sleeve is detachably installed on the installation cavity, and the installation cavity is detachably installed on the regulating bottle cap.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses an endoscopic surgery constant voltage and adjustable exhaust system can make the pressure in the body chamber fluctuate in a small margin between pneumoperitoneum machine set pressure and suction system set pressure, guarantee that the operation position has operating space all the time in the body chamber in the operation process, smog that produces in the operation process can be discharged in succession, avoid the lens to be sheltered from by smog, guarantee that operation position sight is clear, the aspirator is in available state all the time in the operation process;

2. the endoscope operation constant-pressure and adjustable discharge system of the utility model is used, the condition that the suction needs to be suspended because the operation space disappears or the lens needs to be suspended because the lens is shielded by fog and the operation is carried out to wipe the lens can not appear in the operation process, the suction intensity is freely, conveniently and visually adjusted according to the different processes of the operation and the requirements of the operation, the midway change of the suction device is avoided, the patrol nurse is avoided to assist in adjusting the pressure, the continuity and the safety of the operation are ensured, the operator can concentrate on the operation, the labor intensity of the operating doctor is reduced, the misoperation caused by the sight line transfer is avoided, the operation time can be obviously shortened, the relevant complications caused by the prolonging of the carbon dioxide inflation time and the prolonging of the anesthesia time are reduced;

3. the utility model discloses the cost is reasonable, convenient to use, under the condition that does not obviously increase the medical expenses, reducible operation, anesthesia time improve the operation security to alleviate patient's physiology burden and economic burden.

Drawings

FIG. 1 is a schematic structural view of a constant pressure and adjustable drainage system for endoscopic surgery according to a first embodiment of the present invention;

fig. 2 is a schematic view of a matching structure of the annular groove and the sleeve disclosed by the first embodiment of the invention;

fig. 3 is a schematic view of a driving structure of a motor and a rubber wheel disclosed in the first embodiment of the present invention;

fig. 4 is a schematic structural view of the aspirator disclosed in the first embodiment of the present invention;

fig. 5 is a schematic structural view of a constant pressure and adjustable drainage system for endoscopic surgery according to a second embodiment of the present invention.

Illustration of the drawings:

1. a suction apparatus; 2. an adjusting tube; 3. a waste liquid collecting bottle; 4. a pressure regulating bottle; 5. a liquid; 6. a negative pressure interface; 7. a sleeve; 8. a motor; 9. a rubber wheel; 10. an annular groove; 11. mounting a concave cavity; 12. sliding connection holes; 13. sliding and connecting the sleeve; 14. a piston; 15. an electromagnetic valve; 16. a spring; 17. a positive pressure interface; 18. a filter; 19. a base; 20. a power adapter; 21. a pressure balance adjustment button; 22. a mode switching button; 23. adjusting the bottle body; 24. adjusting the bottle cap; 25. a collecting bottle body; 26. a collecting bottle cap; 27. a bushing mounting hole; 28. a hasp; 29. a hose; 30. a screw; 31. an O-shaped sealing ring; 32. a vent valve; 33. a filter cover; 34. a filter element; 35. a bearing seat; 36. and (5) sucking holes.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

The first embodiment is as follows:

as shown in figures 1-4, the utility model discloses a constant pressure and adjustable discharge system for endoscopic surgery, which comprises an aspirator 1, a regulating tube 2, a waste liquid collecting bottle 3 and a pressure regulating bottle 4, wherein the pressure regulating bottle 4 is internally provided with liquid 5, the upper end of the regulating tube 2 is communicated with one end of the upper side of the waste liquid collecting bottle 3 through a hose 29, the other end of the upper side of the waste liquid collecting bottle 3 is communicated with the aspirator 1, thereby, the internal waste liquid can fall to the bottom of the waste liquid collecting bottle 3 under the action of gravity after flowing into the waste liquid collecting bottle 3, thereby uniformly collecting and measuring the volume, the lower end of the regulating tube 2 extends into the pressure regulating bottle 4, and further, the smoke gas flowing out from the waste liquid collecting bottle 3 can enter into the pressure regulating bottle 4, wherein, the upper side of the pressure regulating bottle 4 is provided with a negative pressure interface 6, the negative pressure interface 6 is connected with the central negative pressure VAC which is universal for hospitals, and the liquid 5, the relative movement mode comprises two modes, wherein one mode is that the liquid 5 is fixed, the adjusting pipe 2 moves up and down, the pressure in the abdominal cavity is balanced and the discharge speed is controlled through the depth of the liquid 5, the other mode is that the liquid level of the liquid 5 moves up and down, the adjusting pipe 2 is fixed, and the depth of the adjusting pipe 2 immersed in the liquid 5 can be adjusted to balance the pressure in the abdominal cavity.

In this embodiment, the liquid 5 is fixed and the adjusting tube 2 moves up and down, and specifically, the pressure adjusting bottle 4 is provided with an adjusting tube extension driving mechanism for adjusting the adjusting tube 2 to move up and down. The flexible actuating mechanism of control tube includes sleeve pipe 7, motor 8 and rubber wheel 9, sleeve pipe 7 and 4 rigid couplings of pressure regulation bottle, and the sealed sliding connection in upper end of 7 lower extremes of sleeve pipe and control tube 2 (set up O type sealing washer 31 through the contact surface and guarantee sealed effect), the one end intercommunication of 3 upsides of upper end and waste liquid receiving flask, rubber wheel 9 supports rotatoryly through bearing frame 35, and the laminating of rubber wheel 9 sets up the both sides at control tube 2, one of them rubber wheel 9 passes through the drive of motor 8 and makes control tube 2 get into or stretch out liquid 5, here, provide upwards or decurrent frictional force when rubber wheel 9 rotates.

In the present embodiment, the rubber wheel 9 is provided with an annular groove 10 in the circumferential direction, which is matched to the adjusting tube 2, so that the guiding action of the adjusting tube 2 is ensured.

Further, in the present embodiment, the pressure-regulating bottle 4 includes a regulating bottle body 23 and a regulating bottle cap 24 pivotally connected to each other, and a vent valve 32 is mounted on the regulating bottle cap 24, wherein the vent valve 32 includes a two-position one-way solenoid valve that opens and closes. When the vent valve 32 is opened, the inside and the outside of the adjusting bottle body 23 are communicated; when the vent valve 32 is closed, the regulator bottle body 23 is no longer in direct communication with the atmosphere. The vent valve 32 may be controlled by a button on the aspirator 1. The waste liquid collecting bottle 3 comprises a collecting bottle body 25 and a collecting bottle cap 26 which are pivoted with each other. Wherein, the adjusting tube 2, the adjusting bottle body 23 and the collecting bottle body 25 are all provided with scale marks. The snap 28 is used for pressing and sealing between the adjusting bottle body 23 and the adjusting bottle cap 24 and between the collecting bottle body 25 and the collecting bottle cap 26.

In this embodiment, a filter 18 is further disposed between the negative pressure port 6 and the pressure regulating bottle 4, a filter cover 33 with threads is disposed at an upper end of the filter 18, the filter cover 33 and the filter 18 are detachably and hermetically connected through threads, the negative pressure port 6 is disposed on the filter cover 33, a replaceable filter element 34 is disposed in the filter 18, and the filter element 34 contains sponge and activated carbon for adsorbing smoke particles generated in the abdominal cavity during surgery.

In this embodiment, an installation cavity 11 is further disposed on the pressure adjustment bottle 4, a sliding connection hole 12 is disposed at the bottom of the installation cavity 11 of the pressure adjustment bottle 4, the lower end of the adjustment tube 2 is in sealing sliding connection with the sliding connection hole 12 (an O-ring 31 is disposed on a contact surface to ensure a sealing effect), the motor 8 is fixedly connected in the installation cavity 11, wherein the pressure adjustment bottle 4 includes an adjustment bottle body 23 and an adjustment bottle cap 24, the sleeve 7 is fixed in a sleeve installation hole 27 on the adjustment bottle cap 24 by inserting (the edge above the installation cavity 11 is fixedly connected to the adjustment bottle cap 24 by a screw 30, and the edge of the sleeve 7 is fixedly connected to the installation cavity 11 by a screw 30, thereby facilitating assembly and disassembly).

In the embodiment, the device further comprises a base 19 made of PPS, the waste liquid collecting bottle 3 and the pressure regulating bottle 4 are both placed on the base 19, one end of the base 19 is connected with the motor 8, the other end of the base 19 is connected with a power adapter 20, and power can be supplied to the motor 8 and the electromagnetic vent valve 32 through the base 19. Meanwhile, the aspirator 1 is provided with a pressure balance adjustment button 21 and a mode switching button 22 (for precise control, a display screen may be provided on the aspirator 1): the pressure balance adjusting button 21 controls the motor 8 to rotate forward and backward, the plus key is pressed, the adjusting pipe 2 rises, and when the minus key is pressed, the adjusting pipe 2 descends; the mode switching button 22 controls the opening and closing of the vent valve 32. The method specifically comprises the following steps: when the mode switching button 22 is switched to the active suction state, the vent valve 32 is closed, the pressure regulating bottle 23 is not directly communicated with the atmosphere, the central negative pressure suction force is directly transmitted to the aspirator 1, and the active suction function of the traditional aspirator is performed, so that the rapid suction and the application in vitro or in an open body cavity are realized; when the mode switching button 22 is switched to the passive discharge state, the vent valve 32 is opened, the pressure regulating bottle 23 is directly communicated with the atmosphere, the suction force from the central negative pressure is neutralized, the passive discharge and the body cavity pressure balancing function are performed, and the water inlet depth (10.7cm-16.3cm, corresponding to the proper body pressure of 8-12 mm Hg during the endoscopic surgery) of the pressure regulating tube 2 is controlled by the pressure balance regulating button 21, so that the discharge speed and the body cavity pressure are regulated, and the closed body cavity is applied.

And in order to prevent the absorption passageway of cubic tissue jamming aspirator 1, simultaneously in order to promote the adsorption efficiency of aspirator 1 tip, the input of aspirator 1 is the spherical or the ellipsoid-shaped adsorption head of inflation, and this adsorption head equipartition has a plurality of suction holes 36 to guarantee that internal flue gas or internal liquid can get into from all directions of aspirator 1, improved adsorption efficiency, avoided the harm to internal tissue or the jam of adsorbing the same way.

Example two:

in this embodiment, as shown in fig. 5, a mode that the liquid level of the liquid 5 moves up and down and the adjusting tube 2 does not move is adopted, wherein a liquid level adjusting mechanism is arranged on the pressure adjusting bottle 4, the liquid level adjusting mechanism includes a sliding sleeve 13 and a piston 14, the lower end of the sliding sleeve 13 extends to the bottom of the pressure adjusting bottle 4, the piston 14 is arranged to slide up and down along the sliding sleeve 13 to enable the liquid level of the liquid 5 in the pressure adjusting bottle 4 to rise or fall, and the specific principle is as follows: when the piston 14 moves downwards, the piston 14 can discharge the liquid 5 in the sliding sleeve 13, the liquid 5 is discharged from the hole at the bottom of the sliding sleeve 13, so that the liquid level in the pressure regulating bottle 4 rises, the regulating pipe 2 can also be submerged into the liquid 5, the discharge speed of the aspirator 1 can be regulated by regulating the height of the liquid level, the deeper the regulating pipe 2 is submerged, the slower the discharge is, the shallower the submerged is, the faster the discharge is, when the vent valve 32 is closed, the active negative pressure suction function of the common aspirator is converted, and the maximum negative pressure suction is realized.

Specifically, in this embodiment, the liquid level adjustment mechanism further includes an electromagnetic valve 15 and a spring 16 disposed in the sliding sleeve 13, the sliding sleeve 13 is fixedly connected to the bottle cap 24 of the adjustment bottle through a screw 30, one end of the spring 16 is connected to the top of the sliding sleeve 13, the other end of the spring is connected to the piston 14, the top of the sliding sleeve 13 is provided with a positive pressure interface 17, the positive pressure interface 17 is connected to the electromagnetic valve 15, wherein the positive pressure interface 17 can be connected to a positive pressure connector of a hospital, which is convenient and fast, and when the electromagnetic valve 15 is closed, the pressure maintaining function of the pressure adjustment bottle 4 can be achieved.

Similarly, in this embodiment, a filter 18 is further disposed between the negative pressure port 6 and the pressure regulating bottle 4, a filter cover 33 with threads is disposed at an upper end of the filter 18, the filter cover 33 and the filter 18 are detachably and hermetically connected through threads, the negative pressure port 6 is disposed on the filter cover 33, a replaceable filter element 34 is disposed in the filter 18, and the filter element 34 contains sponge and activated carbon for adsorbing smoke particles generated in the abdominal cavity during surgery.

Similarly, in this embodiment, still include a base 19, adopt the PPS material, waste liquid collecting bottle 3 and pressure regulating bottle 4 all place on base 19, and base 19's one end is connected with motor 8, and the other end is connected with a power adapter 20, can supply power to motor 8 and electromagnetic type breather valve 32 through base 19. Meanwhile, the aspirator 1 is provided with a pressure balance adjusting button 21 (including a "+" key and a "-" key) and a mode switching button 22 (for precise control, a display screen can be arranged on the aspirator 1), and the opening and closing of the electromagnetic valve 15 are controlled by the pressure balance adjusting button 21. The method specifically comprises the following steps: when the mode switching button 22 is switched to the active suction state, the vent valve 32 is closed, the pressure regulating bottle 23 is not directly communicated with the atmosphere, the central negative pressure suction force is directly transmitted to the aspirator 1, and the active suction function of the traditional aspirator is performed, so that the rapid suction and the application in vitro or in an open body cavity are realized; when the mode switching button 22 is switched to the passive discharge state, the vent valve 32 is opened, the pressure regulating bottle 23 is directly communicated with the atmosphere, the suction force from the central negative pressure is neutralized, the passive discharge and the body cavity pressure balancing function are performed, and the water inlet depth (10.7cm-16.3cm, corresponding to the body internal pressure of endoscopic surgery of 8-12 mm Hg) of the pressure regulating tube 2 is controlled by the pressure balance regulating button 21, so that the discharge speed and the body cavity pressure are regulated, and the body cavity is sealed. Wherein, the pressure balance adjustment button 21 controls the depth of entry of the pressure regulating pipe 2 to include: when the "+" key is pressed, the electromagnetic valve 15 is used for air inlet, the piston 14 is used for descending, the liquid level of the liquid 5 is lifted relative to the adjusting pipe 2, when the "-" key is pressed, the electromagnetic valve 15 is used for exhausting air, the piston 14 is lifted, the liquid level of the liquid 5 is descended relative to the adjusting pipe 2, when the key is not pressed, air is not used for air inlet and air outlet, and the piston 14 is kept still. The opening and closing of the electromagnetic valve 15 is controlled by the pressure balance adjusting button 21, and the amount of water discharged by the piston 14, namely the liquid level of the liquid 5, is controlled.

Similarly, in order to prevent the block tissue from being stuck on the adsorption channel of the aspirator 1, and simultaneously, in order to improve the adsorption efficiency of the end part of the aspirator 1, the input end of the aspirator 1 is an expanded spherical or ellipsoidal adsorption head, and a plurality of suction holes 36 are uniformly distributed on the adsorption head, so that the smoke in the body or the liquid in the body can enter from all directions of the aspirator 1, the adsorption efficiency is improved, and the damage to the tissue in the body or the blockage of the same adsorption channel are avoided.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an laparoscopic surgery constant voltage and adjustable drainage system, its characterized in that, including aspirator (1), control tube (2), waste liquid receiving flask (3) and pressure regulation bottle (4), be provided with liquid (5) in pressure regulation bottle (4), the upper end of control tube (2) with the one end intercommunication of waste liquid receiving flask (3) upside, the other end of waste liquid receiving flask (3) upside with aspirator (1) intercommunication, the lower extreme of control tube (2) extends to in the pressure regulation bottle (4), pressure regulation bottle (4) upside is provided with negative pressure interface (6), but liquid (5) and control tube (2) in the pressure regulation bottle (4) set up to relative movement, be provided with inside and outside breather valve (32) of intercommunication on the pressure regulation bottle (4).

2. The endoscopic surgery constant pressure and adjustable drainage system as claimed in claim 1, wherein the pressure regulating bottle (4) is provided with a regulating tube telescopic driving mechanism, the regulating tube telescopic driving mechanism comprises a sleeve (7), a motor (8) and a rubber wheel (9), the sleeve (7) is fixedly connected with the pressure regulating bottle (4), the lower end of the sleeve (7) is in sealed sliding connection with the upper end of the regulating tube (2), the upper end of the sleeve is communicated with one end of the upper side of the waste liquid collecting bottle (3), the rubber wheel (9) is attached to two sides of the regulating tube (2), and one of the rubber wheels (9) is driven by the motor (8) to enable the regulating tube (2) to enter and exit the liquid (5).

3. Endoscopic surgical constant pressure and adjustable drainage system according to claim 2, characterized in that the rubber wheel (9) is circumferentially provided with an annular groove (10) matching the adjustment tube (2).

4. The endoscopic surgery constant pressure and adjustable exhaust system as claimed in claim 3, wherein the pressure regulating bottle (4) is further provided with a mounting cavity (11), the bottom of the mounting cavity (11) is provided with a sliding hole (12), the lower end of the regulating tube (2) is in sealing sliding connection with the sliding hole (12), and the motor (8) is fixedly connected in the mounting cavity (11).

5. The endoscopic surgery constant pressure and adjustable drainage system as claimed in claim 4, characterized in that the pressure regulating bottle (4) is provided with a liquid level regulating mechanism, the liquid level regulating mechanism comprises a sliding sleeve (13) and a piston (14), the lower end of the sliding sleeve (13) extends towards the bottom of the pressure regulating bottle (4), and the piston (14) is arranged to slide up and down along the sliding sleeve (13) to raise or lower the liquid level of the liquid (5) in the pressure regulating bottle (4).

6. The endoscopic surgery constant pressure and adjustable drainage system as claimed in claim 5, characterized in that the liquid level adjusting mechanism further comprises a solenoid valve (15) and a spring (16) arranged in the sliding sleeve (13), one end of the spring (16) is connected with the top of the sliding sleeve (13), the other end of the spring is connected with the piston (14), the top of the sliding sleeve (13) is provided with a positive pressure port (17), and the positive pressure port (17) is connected with the solenoid valve (15).

7. Endoscopic surgery constant pressure and adjustable drainage system according to any of the claims 1-6 characterized in that the pressure regulating bottle (4) is equipped with a filter (18) on its upper side, the negative pressure port (6) is arranged on the filter (18), and the filter (18) is provided with a replaceable filter element (34).

8. Endoscopic surgical constant voltage and adjustable drain system according to any of claims 1-6, further comprising a base (19), wherein one end of said base (19) is connected to a power adapter (20).

9. The endoscopic surgery constant pressure and adjustable drainage system as claimed in any one of claims 1 to 6, wherein the aspirator (1) is provided with a mode switching button (22) for controlling the vent valve (32) and a pressure balance adjusting button (21) for controlling the relative position of the adjusting tube (2) and the liquid (5), and the suction end of the aspirator (1) is of a spherical structure with a plurality of suction holes (36) distributed uniformly.

10. Endoscopic surgery constant pressure and adjustable drainage system according to any of claims 4-6 characterized in that the pressure regulating bottle (4) comprises a regulating bottle body (23) and a regulating bottle cap (24) pivotally connected to each other, the waste liquid collecting bottle (3) comprises a collecting bottle body (25) and a collecting bottle cap (26) pivotally connected to each other, the cannula (7) is detachably mounted on the mounting cavity (11), and the mounting cavity (11) is detachably mounted on the regulating bottle cap (24).

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