Aspirator for surgical debridement

Abstract

The invention relates to the technical field of medical instruments, in particular to an aspirator for surgical debridement, which comprises a debridement mechanism, the debridement mechanism comprises a negative pressure aspirator, a buffer bottle and a liquid storage bottle which are arranged on the negative pressure aspirator, and a hose for sequentially connecting the negative pressure aspirator, the buffer bottle and the liquid storage bottle, the aspirator is connected with the liquid storage bottle through a hose, the suction force adjusting mechanism comprises a negative pressure adjusting assembly arranged on the hose connected with the liquid storage bottle and the aspirator, and a gear shifting assembly arranged on the negative pressure adjusting assembly; the negative pressure adjusting assembly comprises a circulation pipe connected with the aspirator and a negative pressure hole formed in the circulation pipe, and the problems that existing suction equipment usually only has a fixed suction force, even if the suction force can be adjusted, the suction force needs to be adjusted and set on a negative pressure main machine, and the suction force cannot be adjusted are solved. And adjustment cannot be carried out in real time according to actual requirements in the operation process.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and more particularly to a suction device for surgical debridement. Background Art

[0002] In surgical operations, debridement is a crucial step aimed at removing foreign matter, necrotic tissue and blood from the wound to promote wound healing and reduce the risk of infection. The aspirator is one of the indispensable medical tools for debridement. The aspirator creates a negative pressure state in the suction head and uses atmospheric pressure to squeeze the material outside the suction head into the suction head, thereby achieving the "suction" effect. It is widely used in the cleaning of bleeding, exudate, pus, and contents of chest organs during surgery.

[0003] During surgical debridement, various types of tissue residues will be encountered, such as blood, pus, adipose tissue and necrotic tissue. The properties, shapes and sizes of these substances are different, so different suction forces are required to effectively remove them. However, existing suction devices often only have a fixed suction force. Even if the suction force can be adjusted, it is necessary to adjust it on the negative pressure host, and it cannot be adjusted in real time according to actual needs during the operation.

[0004] When faced with difficult-to-clean tissues, such as relatively viscous pus or tightly attached necrotic tissue, fixed suction often cannot effectively absorb them, which not only affects the efficiency of the operation, but may also lead to increased risk of contamination and infection in the surgical area. In addition, excessive suction may also cause damage to surrounding healthy tissues, such as rupturing blood vessels or nerve tissue, and further causing bleeding or functional disorders. In order to solve the above problems, an aspirator for surgical debridement is proposed. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In response to the problems existing in the prior art, the present invention provides a suction device for surgical debridement to solve the problem that the existing suction equipment mentioned in the background technology often has only a fixed suction force, and even if the suction force can be adjusted, it needs to be adjusted and set on the negative pressure host, and it cannot be adjusted in real time according to actual needs during the operation.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a suction device for surgical debridement, comprising a debridement mechanism, which includes a negative pressure suction machine, a buffer bottle and a liquid storage bottle arranged on the negative pressure suction machine, and also includes a hose for connecting the negative pressure suction machine, the buffer bottle and the liquid storage bottle in sequence, and a suction end tube connected to the liquid storage bottle through the hose, a suction force adjustment mechanism, which includes a negative pressure adjustment component arranged on the hose connecting the liquid storage bottle and the suction end tube, and a shifting component arranged on the negative pressure adjustment component, the negative pressure adjustment component includes a circulation tube connected to the suction end tube, a negative pressure hole opened on the circulation tube, and also includes a guide tube arranged in the inner cavity of the circulation tube and corresponding to the negative pressure hole, and a sleeve sleeved on the outside of the circulation tube, the guide tube is provided with a guide surface, and the opening end of the guide tube away from the negative pressure hole is inclined.

[0009] The present invention is further configured such that a plurality of negative pressure holes are provided in a linear array along the axial direction of the circulation tube, and a flow guide tube is provided in communication with the plurality of negative pressure holes.

[0010] The present invention is further configured such that one end of the circulation tube is fixedly connected to the suction end tube, and the other end of the circulation tube is fixedly connected to the hose, a stopper is provided at one end of the circumferential side wall of the circulation tube close to the hose, and a return spring is sleeved on the outside of the circulation tube.

[0011] The present invention is further configured such that a spring cavity is provided at one end of the sleeve close to the stopper, and the spring cavity matches the return spring.

[0012] The present invention is further configured such that a pressure rod is rotatably mounted on one end of the circumferential side wall of the flow tube away from the block, and a finger ring is provided on the end of the pressure rod away from the rotatable connection with the flow tube, a connecting rod is rotatably mounted on one end of one side of the pressure rod close to the finger ring, and the end of the connecting rod away from the pressure rod is rotatably connected to the circumferential side wall of the sleeve.

[0013] The present invention is further configured such that a limiting groove is provided on the outer wall of the circumferential side wall of the circulation pipe, a limiting strip is provided on the inner wall of the sleeve, and the limiting strip and the limiting groove are slidably matched.

[0014] The present invention is further configured such that the gear adjustment assembly includes a gear groove opened on the outer wall of the circumferential side wall of the flow pipe, and the gear groove is composed of a stepped gear area and a reset area.

[0015] The present invention is further configured such that the step stop zone is a stepped strip groove, and the high end of the strip groove step is located at an end of the step stop zone away from the sleeve.

[0016] The present invention is further configured such that the reset zone is an arc-shaped groove, and the bottom surface of the arc-shaped groove is inclined, the reset zone is arranged on one side of the step gear zone, and the reset zone and the two ends of the step gear zone are connected, the high end of the inclined bottom surface of the reset zone is away from the sleeve, and the high end of the inclined bottom surface of the reset zone is higher than the high end of the step gear zone and is connected in a step shape, and the low end of the inclined bottom surface of the reset zone is flush with the low end of the step gear zone and is gently connected.

[0017] The present invention is further configured such that the gear adjustment assembly also includes a rotating hole opened at one end of the sleeve away from the return spring, and a shift rod is rotatably installed inside the rotating hole, the shift rod is U-shaped, and the end of the shift rod away from the rotating hole is slidably matched with the shift groove.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides a suction device for surgical debridement, which has the following beneficial effects:

[0020] 1. The present invention arranges a negative pressure regulating component between the suction end tube and the hose. After the negative pressure suction machine is started and the negative pressure suction is adjusted, the suction end tube has an initial suction, which is the minimum suction value, and can be used to suck out and clean some blood. When cleaning difficult-to-clean substances such as pus, adipose tissue and necrotic tissue, the finger ring is pressed to drive the pressure rod to drive the connecting rod, so that the sleeve moves on the circulation tube to cover the negative pressure hole, thereby improving the suction of the suction end tube, thereby solving the problem that the existing suction equipment often has only a fixed suction, and even if the suction can be adjusted, it needs to be adjusted and set on the negative pressure host, and it cannot be adjusted in real time according to actual needs during the operation.

[0021] 2. In the present invention, a connecting guide pipe is arranged inside the flow pipe and at a position corresponding to the negative pressure hole. The flow direction of the material sucked into the flow pipe is guided by the guide surface on the guide pipe, and the opening end of the guide pipe away from the negative pressure hole is inclined, and the direction of the inclined opening forms a large acute angle with the axial direction of the guide pipe, so that when the material moves along the guide surface and then detaches, the position of the material exceeds the opening position of the guide pipe, thereby preventing the flowing material from entering the guide pipe.

[0022] 3. When the present invention drives the sleeve to move and cover the negative pressure hole by pressing the finger ring and adjusts the suction force of the suction end tube, the gear position can be locked when adjusted to a suitable position through the setting of the gear adjustment component, thereby avoiding the occurrence of hand cramps caused by manual continuous pressing of the finger ring to control the gear position. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a suction device for surgical debridement.

[0024] Figure 2 This is a schematic diagram of the suction adjustment mechanism structure of a suction device used for surgical debridement.

[0025] Figure 3 Schematic diagram of the internal structure of the suction adjustment mechanism of the suction device used for surgical debridement.

[0026] Figure 4 This is a schematic diagram of the circulation tube structure of a suction device used for surgical debridement.

[0027] Figure 5 Schematic diagram of the cannula structure of the suction device used for surgical debridement.

[0028] Figure 6 This is a structural schematic diagram of the connection between the stepped stop area and the reset area in the stop slot of a suction device for surgical debridement.

[0029] In the figure: 1. debridement mechanism; 101. negative pressure suction machine; 102. buffer bottle; 103. liquid storage bottle; 104. hose; 105. suction end tube; 2. suction force adjustment mechanism; 3. negative pressure adjustment assembly; 301. circulation tube; 302. negative pressure hole; 303. guide tube; 304. sleeve; 305. guide surface; 306. block; 307. reset spring; 308. spring chamber; 309. pressure rod; 310. finger ring; 311. connecting rod; 312. limit groove; 313. limit strip; 4. gear adjustment assembly; 401. gear groove; 402. step gear area; 403. reset area; 404. rotation hole; 405. gear rod. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0032] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0033] For examples, see Figure 1 - Figure 6A suction device for surgical debridement includes a debridement mechanism 1, which includes a negative pressure suction machine 101, a buffer bottle 102 and a liquid storage bottle 103 arranged on the negative pressure suction machine 101, and also includes a hose 104 used to connect the negative pressure suction machine 101, the buffer bottle 102 and the liquid storage bottle 103 in sequence, and a suction end tube 105 connected to the liquid storage bottle 103 through the hose 104. The negative pressure suction machine 101 is connected to the inside of the buffer bottle 102 through the hose 104, and then the buffer bottle 102 is connected to the liquid storage bottle 103 through the hose 104, and finally the liquid storage bottle 103 is connected to the suction end tube 105 through the hose 104. The negative pressure suction machine 101 can adjust the initial suction force and is suitable for debridement in different surgeries.

[0034] The suction force regulating mechanism 2 comprises a negative pressure regulating component 3 disposed on a hose 104 connecting a liquid storage bottle 103 and a suction end tube 105, and a gear adjustment component 4 disposed on the negative pressure regulating component 3;

[0035] The negative pressure regulating assembly 3 includes a circulation tube 301 connected to the suction end tube 105, a negative pressure hole 302 opened on the circulation tube 301, a flow guide tube 303 arranged in the inner cavity of the circulation tube 301 and corresponding to the negative pressure hole 302, and a sleeve 304 sleeved on the outside of the circulation tube 301;

[0036] A flow guiding surface 305 is provided on the flow guiding tube 303 , and the opening end of the flow guiding tube 303 away from the negative pressure hole 302 is inclined.

[0037] The negative pressure regulating component 3 is arranged between the hose 104 and the suction end tube 105 . After the negative pressure suction machine 101 is started, the suction force generated by the negative pressure sucks the debridement material from the suction end tube 105 , flows through the circulation tube 301 and the hose 104 into the liquid storage bottle 103 .

[0038] Specifically, in the initial state, the sleeve 304 is sleeved on the outside of the circulation tube 301 and does not cover the negative pressure hole 302. Therefore, after the negative pressure suction machine 101 is started, the gas sucked in by the negative pressure will enter from the port of the suction end tube 105 and the negative pressure hole 302. At this time, the gas flow rate generated by the initial suction set by the negative pressure suction machine 101 is fixed. During the surgical debridement process, when difficult-to-clean tissue or pus appears, it is necessary to increase the suction of the suction end tube 105. The sleeve 304 can be moved so that the sleeve 304 covers the negative pressure hole 302, thereby reducing the area of ​​the air inlet hole. However, the gas flow rate generated by the initial suction set by the negative pressure suction machine 101 is fixed, so the gas flow rate will increase, thereby increasing the suction of the port of the suction end tube 105, thereby cleaning the difficult-to-clean tissue or pus, and there is no need to stop the operation to adjust the suction through the negative pressure suction machine 101.

[0039] Furthermore, after entering the circulation tube 301, the debridement material flows along the guide surface 305 of the guide tube 303 toward the axial direction of the circulation tube 301. After the airflow entering through the negative pressure hole 302 passes through the guide tube 303 and enters the interior of the circulation tube 301, its airflow direction is to first flow in the direction of the inner wall of the guide tube 303, and then move along the axial direction of the circulation tube 301, thereby driving the debridement material to flow out from the end of the circulation tube 301 away from the suction end tube 105, and finally enter the liquid storage bottle 103 through the hose 104.

[0040] A plurality of negative pressure holes 302 are provided in a linear array along the axial direction of the circulation tube 301, and the plurality of negative pressure holes 302 are all connected to a flow guide tube 303. The plurality of negative pressure holes 302 are provided in a linear array, so that the sleeve 304 can generate suction adjustments of different gears when moving and covering, that is, covering one negative pressure hole 302 corresponds to one gear of suction adjustment.

[0041] Furthermore, the plurality of guide tubes 303 are arranged linearly, so that when the debridement material flows through the guide tube 303 near one end of the suction end tube 105 and enters the next guide tube 303, the debridement material will slightly diffuse to both sides and then hit the guide surface 305 of the next guide tube 303, and the distance from the position where the debridement material hits the guide surface 305 to the axis of the circulation tube 301 is smaller than the distance from the opening of the guide tube 303 to the axis of the circulation tube 301, thereby preventing the debridement material circulating in the circulation tube 301 from entering the guide tube 303.

[0042] One end of the circulation tube 301 is fixedly connected to the suction end tube 105, and the other end of the circulation tube 301 is fixedly connected to the hose 104. A stopper 306 is provided at one end of the circumferential side wall of the circulation tube 301 close to the hose 104, and a return spring 307 is sleeved on the outside of the circulation tube 301.

[0043] A spring cavity 308 is formed at one end of the sleeve 304 close to the stopper 306 , and the spring cavity 308 matches the return spring 307 .

[0044] In the initial state, the return spring 307 is in a relaxed state, one end of which abuts against the block 306, and the other end pushes the sleeve 304, so that the sleeve 304 is located on one side of the multiple negative pressure holes 302 in the linear array, so that the negative pressure holes 302 are all in an open state in the initial state. During the operation, when it is necessary to adjust the suction of the suction end tube 105, the sleeve 304 is moved toward the block 306 to cover and block the negative pressure holes 302. The number of negative pressure holes 302 moved to cover and block is selected according to actual conditions, so as to achieve different suction forces of the suction end tube 105, and when the sleeve 304 moves toward the block 306, it will squeeze the return spring 307, so that after the suction end tube 105 adjusts the suction force to remove the difficult-to-clean tissue or pus, it can be reset under the action of the return spring 307, and the suction force is reduced to the initial suction for debridement, thereby protecting the patient's wound.

[0045] Furthermore, the spring cavity 308 opened at one end of the sleeve 304 can prevent the reset spring 307 from being deformed and stuck outside the sleeve 304 when the sleeve 304 moves to squeeze the reset spring 307 .

[0046] A pressure rod 309 is rotatably installed on one end of the circumferential side wall of the circulation tube 301 away from the stop block 306, and a finger ring 310 is provided on the end of the pressure rod 309 away from the rotatable connection with the circulation tube 301, a connecting rod 311 is rotatably installed on one end of the pressure rod 309 close to the finger ring 310, and the end of the connecting rod 311 away from the pressure rod 309 is rotatably connected to the circumferential side wall of the sleeve 304.

[0047] Two pressure rods 309 are provided, and the two pressure rods 309 are symmetrically rotatably installed on one end of the circumferential side wall of the circulation tube 301 away from the block 306 through a rotating ear. The two pressure rods 309 are provided with a rotating ear on the side close to the circulation tube 301, and the circumferential side wall of the sleeve 304 is provided with a rotating ear. The connecting rod 311 is rotatably connected to the rotating ears on the pressure rod 309 and the rotating ears on the sleeve 304 respectively.

[0048] Furthermore, under the action of the reset spring 307, the connecting rod 311 and the pressure rod 309 in the initial state are set at an obtuse angle, so that when the pressure rod 309 rotates close to the circulation tube 301, it drives the connecting rod 311 to push the sleeve 304 to move in the direction of the block 306, thereby blocking the negative pressure hole 302, thereby achieving the purpose of adjusting the suction force of the suction end tube 105, and its operation can be easily performed during the operation without delaying the progress of the operation.

[0049] A limiting groove 312 is provided on the outer wall of the circumferential side wall of the circulation tube 301, and a limiting strip 313 is provided on the inner wall of the sleeve 304, and the limiting strip 313 and the limiting groove 312 are slidably matched. Through the slidably matching between the limiting strip 313 and the limiting groove 312, the sleeve 304 can only move along the axial direction of the circulation tube 301 under the push of the connecting rod 311, and will not rotate, thereby improving the stability of the pressing of the pressure rods 309 on both sides.

[0050] The shift adjustment assembly 4 includes a shift groove 401 formed on the outer wall of the circumferential side wall of the flow pipe 301 , and the shift groove 401 is composed of a stepped shift area 402 and a reset area 403 .

[0051] The step stop area 402 is a stepped strip groove, and the high end of the strip groove step is located at an end of the step stop area 402 away from the sleeve 304 .

[0052] The reset area 403 is an arc-shaped groove, and the bottom surface of the arc-shaped groove is inclined. The reset area 403 is arranged on one side of the step gear area 402, and the reset area 403 and the step gear area 402 are connected at both ends. The high end of the inclined bottom surface of the reset area 403 is away from the sleeve 304, and the high end of the inclined bottom surface of the reset area 403 is higher than the high end of the step gear area 402 and is connected in a step shape. The low end of the inclined bottom surface of the reset area 403 is flush with the low end of the step gear area 402 and is gently connected.

[0053] The gear adjustment assembly 4 also includes a rotating hole 404 opened at one end of the sleeve 304 away from the return spring 307, and a shift rod 405 is rotatably installed inside the rotating hole 404. The shift rod 405 is U-shaped, and the end of the shift rod 405 away from the rotating hole 404 is slidably matched with the shift slot 401.

[0054] Through the setting of the gear slot 401 and the gear rod 405, the gear rod 405 is rotatably installed in the rotating hole 404 of the sleeve 304. When adjusting the suction force of the suction end tube 105, the pressure rod 309 is held tightly to drive the connecting rod 311 to push the sleeve 304 to block the negative pressure hole 302 to adjust the suction force. When the sleeve 304 moves, it drives the gear rod 405 to move in the stepped gear area 402. Every time a gear is reached, it will fall from the gear surface of the high step to the gear surface of the low step, and then under the action of the reset spring 307, it will reset to the side of the high step gear, thereby realizing the locking of the gear. If the stepped gear area 402 is a flat setting, the gear cannot be adjusted, and manual pressing is required, which will cause muscle fatigue and cramps. In addition, it is difficult to accurately control the position of the sleeve 304 to move and block the negative pressure hole 302 by manual continuous pressing, which makes it difficult to control the suction force.

[0055] Furthermore, one end of the shift rod 405 away from the rotating hole 404 slides and matches in the shift groove 401, and when the end of the shift rod 405 is located at the highest step of the stepped shift area 402, the shift rod 405 is elastically pushed upward by the step, so that it has a downward deformation driving force. Therefore, when moving with the sleeve 304, the shift rod 405 gradually deforms and recovers along the steps of the stepped shift area 402, so that the shift rod 405 is in contact with each step surface until the last step surface, when the shift rod 405 is in a relaxed state with no contact with the bottom surface.

[0056] It should be noted that the intersection surface between the penultimate step and the last step of the step gear zone 402 is an arc surface, which is used for the gear rod 405 to rotate to the reset zone 403. The gear can be locked each time the suction force is adjusted. When unlocking is required, the pressure rod 309 is held tightly so that the sleeve 304 drives the gear rod 405 to move to the last step of the step gear zone 402 and then released. Under the action of the reset spring 307, the gear rod 405 located at the last step of the step gear zone 402 enters the reset zone 403 along the arc surface, and then the gear rod 405 is squeezed and deformed again by the inclined bottom surface of the reset zone 403, and then enters the gear position of the highest step of the step gear zone 402 from the end of the reset zone 403 away from the last step of the step gear zone 402.

[0057] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, welding is preferred for all fixed connections. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and deformations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A suction device for surgical debridement, characterized by: include, A debridement mechanism (1), comprising a negative pressure suction machine (101), a buffer bottle (102) and a liquid storage bottle (103) arranged on the negative pressure suction machine (101), a hose (104) for sequentially connecting the negative pressure suction machine (101), the buffer bottle (102) and the liquid storage bottle (103), and a suction end tube (105) connected to the liquid storage bottle (103) via the hose (104); A suction force regulating mechanism (2) comprising a negative pressure regulating component (3) arranged on a hose (104) connecting the liquid storage bottle (103) and the suction end tube (105), and a gear adjustment component (4) arranged on the negative pressure regulating component (3); The negative pressure regulating component (3) comprises a circulation tube (301) connected to the suction end tube (105), a negative pressure hole (302) opened on the circulation tube (301), a flow guide tube (303) arranged in the inner cavity of the circulation tube (301) and corresponding to the negative pressure hole (302), and a sleeve (304) sleeved on the outside of the circulation tube (301); The flow guide tube (303) is provided with a flow guide surface (305), and the end of the flow guide tube (303) away from the opening of the negative pressure hole (302) is arranged at an angle.

2. The suction device for surgical debridement according to claim 1, characterized in that: A plurality of negative pressure holes (302) are provided in a linear array along the axial direction of the circulation tube (301), and the plurality of negative pressure holes (302) are all connected to a flow guide tube (303).

3. The suction device for surgical debridement according to claim 2, characterized in that: One end of the circulation tube (301) is fixedly connected to the suction end tube (105), and the other end of the circulation tube (301) is fixedly connected to the hose (104); A stopper (306) is provided at one end of the circumferential side wall of the circulation tube (301) close to the hose (104), and a return spring (307) is sleeved on the outside of the circulation tube (301).

4. The suction device for surgical debridement according to claim 3, characterized in that: A spring cavity (308) is provided at one end of the sleeve (304) close to the stopper (306), and the spring cavity (308) matches the return spring (307).

5. The suction device for surgical debridement according to claim 4, characterized in that: A pressure rod (309) is rotatably mounted on one end of the circumferential side wall of the circulation tube (301) away from the stopper (306), and a finger ring (310) is provided at one end of the pressure rod (309) away from the rotatable connection with the circulation tube (301). A connecting rod (311) is rotatably mounted on one end of the pressure rod (309) close to the finger ring (310), and the end of the connecting rod (311) away from the pressure rod (309) is rotatably connected to the circumferential side wall of the sleeve (304).

6. The suction device for surgical debridement according to claim 5, characterized in that: The outer wall of the circumferential side wall of the circulation pipe (301) is provided with a limiting groove (312); A limiting strip (313) is provided on the inner wall of the sleeve (304), and the limiting strip (313) and the limiting groove (312) are slidably matched.

7. The suction device for surgical debridement according to claim 6, characterized in that: The gear adjustment component (4) comprises a gear groove (401) formed on the outer wall of the circumferential side wall of the circulation pipe (301), and the gear groove (401) is composed of a stepped gear area (402) and a reset area (403).

8. The suction device for surgical debridement according to claim 7, characterized in that: The step stop zone (402) is a stepped strip groove, and the high end of the strip groove step is located at an end of the step stop zone (402) away from the sleeve (304).

9. The suction device for surgical debridement according to claim 8, characterized in that: The reset area (403) is an arc-shaped groove, and the bottom surface of the arc-shaped groove is inclined; The reset area (403) is arranged on one side of the step shift area (402), and the reset area (403) and the step shift area (402) are connected at both ends; The inclined high end of the bottom surface of the reset zone (403) is away from the sleeve (304), and the inclined high end of the bottom surface of the reset zone (403) is higher than the high end of the step gear zone (402) and is connected in a step-like manner, and the inclined low end of the bottom surface of the reset zone (403) is flush with the low end of the step gear zone (402) and is gently connected.

10. The suction device for surgical debridement according to claim 9, characterized in that: The gear adjustment assembly (4) further comprises a rotation hole (404) formed at one end of the sleeve (304) away from the return spring (307), and a shift rod (405) is rotatably mounted inside the rotation hole (404), the shift rod (405) being arranged in a U shape, and one end of the shift rod (405) away from the rotation hole (404) is slidably matched with the shift groove (401).

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