Drainage puncture device for abdominal surgery

Abstract

The application discloses a drainage puncture device for abdominal cavity surgery and relates to the technical field of medical devices.The drainage puncture device comprises a puncture tube, an inner sleeve and an outer sleeve, a tubular cavity is formed between the outer sleeve and the inner sleeve, a matched rubber sleeve is adjustably arranged in the tubular cavity, the matched rubber sleeve and the upper end of the tubular cavity form a sealed space, the sealed space is connected with an air valve, the matched rubber sleeve is connected with a rubber sleeve, the rubber sleeve extends to the bottom end of the tubular cavity and is connected with a positioning air bag, the positioning air bag is turned outwards after penetrating out of the tubular cavity and is sleeved on the outer side of the outer sleeve, a plurality of groups of air guide rubber tubes are uniformly arranged between the matched rubber sleeve and the rubber sleeve, the end portions of the air guide rubber tubes extend into the positioning air bag, and the outer sleeve is sleeved with a positioning rubber ring; the position of the positioning air bag on the outer sleeve is adjusted by adjusting the position of the matched rubber sleeve in the tubular cavity, so that the drainage puncture device can be adjusted and fixed according to the thickness of the abdominal cavity wall and the drainage depth.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically a drainage trocar for abdominal surgery. Background Technology

[0002] Abdominal surgery is generally accompanied by the leakage of fluids such as blood, lymph, and tissue fluid, which need to be drained from the body in a timely manner. A drainage trocar is usually used to establish a drainage channel to remove these exudates, reducing the amount of fluid accumulation in the surgical site and thus lowering the risk of infection.

[0003] In the process of aspirating peritoneal fluid and injecting medication, the existing puncture drainage device cannot be flexibly adjusted between the device and the abdominal wall according to the surgical site and the thickness of the abdominal wall. This can easily lead to the drainage device failing to drain the fluid in a timely and safe manner. Summary of the Invention

[0004] The purpose of this invention is to provide a drainage trocar for abdominal surgery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A drainage trocar for abdominal surgery includes a trocar tube, the upper end of which is connected to a drainage nozzle, and the lower end of which is connected to a trocar head. An inner cannula and an outer cannula are fitted around the outer side of the trocar tube. A handle is provided at the top of the inner cannula. A tubular cavity is formed between the outer and inner cannsulas. The upper end of the tubular cavity is closed, and a matching rubber sleeve is adjustablely installed within the tubular cavity. The matching rubber sleeve and the upper end of the tubular cavity form a sealed space, and an air valve is connected to this sealed space. The fitting sleeve is connected to a rubber sleeve, and the rubber sleeve extends to the bottom end of the tubular cavity and is connected to a positioning airbag. After the positioning airbag passes through the tubular cavity, it is turned outward and fitted onto the outside of the outer sleeve. Multiple sets of air-guiding tubes are evenly distributed between the fitting sleeve and the rubber sleeve. The ends of the air-guiding tubes extend into the positioning airbag. A positioning rubber ring is fitted onto the outer sleeve. After the positioning airbag is inflated, it and the positioning rubber ring are distributed on the inner and outer sides of the abdominal wall, so that the trocar is fixed to the abdominal wall.

[0007] As a further embodiment of the present invention: the upper outer ring of the inner sleeve is provided with a connecting thread, the top of the outer sleeve is engaged with the connecting thread, a limiting ring is provided above the connecting thread of the inner sleeve, and a sealing ring is provided on the side of the limiting ring facing the end of the outer sleeve.

[0008] As a further embodiment of the present invention: the surface of the inner sleeve is uniformly provided with anti-slip grooves, the mating rubber sleeve is provided with protrusions that cooperate with the anti-slip grooves, and the air guide tube passes through the top of the mating rubber sleeve and communicates with the air valve.

[0009] As a further embodiment of the present invention: a puncture control component is provided inside the handle portion, the puncture control component includes a control rod disposed at the top of the puncture tube, the outer ring of the control rod is uniformly provided with annular protrusions, a pressing block is provided on the handle portion, the portion of the pressing block located on the inner side of the handle is connected to a connecting flange, a plug-in post is provided on the inner side of the handle portion, the connecting flange and the plug-in post are plugged into each other, a return spring is provided between the plug-in post and the connecting flange, a push plate is provided on the pressing block, the end of the push plate is provided with a mating hole, the control rod passes through the mating hole and extends to the top of the handle portion, a central tube is provided at the center of the handle portion, a positioning plate is provided inside the central tube, the control rod passes through the positioning plate and is connected to a pressing protrusion, a return spring is sleeved on the control rod between the positioning plate and the pressing protrusion.

[0010] As a further embodiment of the present invention: the mating hole is provided with a groove that cooperates with the annular protrusion, and the pressing blocks are symmetrically arranged on both sides of the handle.

[0011] As a further embodiment of the present invention: a matching piston is provided on the inner side of the puncture tube, a flow guiding hose is provided on the matching piston, the flow guiding hose passes through the top of the puncture tube and is connected to a connecting hose, the puncture tube is connected to an air valve through the connecting hose, a connecting steel wire is provided on the matching piston, the connecting steel wire passes through the top of the puncture tube and extends to the outside of the handle, and a pull ring is provided at the end of the connecting steel wire.

[0012] As a further embodiment of the present invention: a positioning ring is provided on the inner side of the air valve, the positioning ring is connected to a support spring, and a rubber plug is provided at the end of the support spring and the air valve.

[0013] As a further embodiment of the present invention: the outer wall of the outer sleeve is uniformly provided with anti-slip grooves, and the positioning rubber ring and the positioning airbag cooperate with each other with the anti-slip grooves.

[0014] As a further embodiment of the present invention: a positioning sleeve is provided between the puncture tube and the inner sheath, and a sealing sleeve is provided between the ends of the puncture tube and the inner sheath.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) The rubber sheath and the positioning balloon at the end pass through the outer tube. After the outer tube and inner tube are installed, the rubber sheath and positioning balloon extending from the end of the tubular cavity are turned outwards to wrap around the outside of the outer tube, and the positioning balloon is pushed upwards along the outer tube so that the rubber sheath is fully extended. At this time, the distance between the positioning balloon and the end of the puncture tube is equal to the depth of the peritoneal fluid accumulation measured earlier minus the thickness of the abdominal wall. This allows for flexible adjustment of the position of the positioning balloon according to the thickness of the abdominal wall and the drainage depth.

[0017] (2) The outer sleeve is fixedly installed between the inner sleeve and the connecting thread. The upper end of the tubular cavity is sealed by the limiting ring and the sealing ring, so as to ensure that no air leakage occurs when the air is filled into the tubular cavity through the air valve, and to ensure the reliable opening and positioning of the positioning airbag.

[0018] (3) Due to the different thickness of the abdominal wall and the depth of fluid accumulation, the height of the positioning airbag relative to the outer tube needs to be flexibly adjusted. In order to ensure that the positioning airbag does not slide relative to the outer tube before and after adjustment, a protrusion is set on the inner tube so that the rubber sleeve and the protrusion cooperate with each other. Under its own elasticity, the rubber sleeve will also shrink and stick to the outer wall of the inner tube. The rubber sleeve and the positioning airbag that protrude from the end of the tubular cavity need to be stretched and expanded to cover the outer wall of the outer tube, which further ensures the reliable positioning of the positioning airbag after adjustment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0021] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle.

[0022] Figure 4 for Figure 2 Enlarged structural diagram at point B.

[0023] Figure 5 for Figure 2 Enlarged structural diagram at point C.

[0024] Figure 6 This is a schematic diagram of the internal structure of the air valve in this invention.

[0025] Figure 7 This is a schematic diagram of the puncture control component in this invention.

[0026] Figure 8 This is a schematic diagram of the internal structure of the puncture tube in this invention.

[0027] In the diagram: 1. Outer sleeve; 10. Inner sleeve; 100. Anti-slip groove; 11. Connecting thread; 12. Limiting ring; 13. Sealing ring; 2. Handle; 21. Drainage nozzle; 22. Air valve; 220. Rubber stopper; 221. Support spring; 222. Positioning ring; 3. Puncture control assembly; 30. Pressing block; 31. Push plate; 32. Central tube; 33. Positioning plate; 34. Pressing protrusion; 35. Return. 36. Spring 1; 37. Connecting flange; 38. Insertion post; 39. Return spring 2; 30. Mating hole; 4. Positioning rubber ring; 5. Positioning airbag; 50. Mating rubber sleeve; 51. Air guide tube; 52. Rubber sleeve; 6. Puncture tube; 60. Positioning sleeve; 61. Puncture head; 62. Control rod; 620. Annular protrusion; 63. Connecting steel wire; 64. Connecting hose; 65. Guide hose; 66. Mating piston. Detailed Implementation

[0028] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0029] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, a drainage trocar for abdominal surgery includes a trocar 6, the upper end of which is connected to a drainage nozzle 21, and the lower end of which is connected to a trocar head 61. An inner cannula 10 and an outer cannula 1 are sleeved on the outside of the trocar 6. A handle 2 is provided at the top of the inner cannula 10. A tubular cavity is formed between the outer cannula 1 and the inner cannula 10. The upper end of the tubular cavity is closed, and a matching rubber sleeve 50 is adjustablely installed inside the tubular cavity. The matching rubber sleeve 50 and the upper end of the tubular cavity form a sealed space, and this sealed space is connected to an air... Valve 22, the mating rubber sleeve 50 is connected to a rubber sleeve 52, and the rubber sleeve 52 extends to the bottom end of the tubular cavity and is connected to a positioning airbag 5. The positioning airbag 5 passes through the tubular cavity and is turned outward to fit on the outside of the outer sleeve. Multiple sets of air guiding tubes 51 are evenly distributed between the mating rubber sleeve 50 and the rubber sleeve 52. The end of the air guiding tube 51 extends into the positioning airbag 5. A positioning rubber ring 4 is fitted on the outer sleeve 1. After the positioning airbag 5 is inflated, it and the positioning rubber ring 4 are distributed on the inner and outer sides of the abdominal cavity wall, so that the trocar is fixed on the abdominal cavity wall.

[0030] Specifically, when using a drainage trocar to drain fluid from the abdominal cavity, the depth of the fluid-containing area and the thickness of the abdominal wall are first initially determined using the trocar 6. Based on this depth, the position of the rubber sleeve 50 on the inner cannula 10 is adjusted. Then, the outer cannula 1 is fitted onto the inner cannula 10, with the rubber sleeve 52 and the positioning balloon 5 at the end passing through the inside of the outer cannula 1. After the outer cannula 1 and the inner cannula are installed, the rubber sleeve 52 and the positioning balloon 5, which extend from the tubular cavity end, are turned outwards to wrap around the outside of the outer cannula 1, and the positioning balloon 5 is pushed upwards along the outer cannula 1, causing the rubber sleeve 52 to fully extend. At this point, the distance between the positioning balloon 5 and the end of the trocar 6 is equal to the previously measured depth of the fluid-containing area in the abdominal cavity minus the thickness of the abdominal wall. Subsequently, the positioning airbag 5 is inflated by the air valve 22. The positioning rubber ring 4 and the positioning airbag 5 are used to fix the drainage puncture device on the abdominal wall. The puncture head 61 is located at the site of abdominal effusion for drainage. At the same time, medication can be injected into the surgical site through the drainage nozzle 21.

[0031] It should be noted that before installing the outer sleeve 1, a string can be tied to the retracted positioning airbag 5 so that the string passes through the outer sleeve 1. During the process of interlocking between the outer sleeve 1 and the inner sleeve 10, the positioning airbag 5 can be pulled out of the outer sleeve 1 through the string, so that the rubber sleeve 52 and the positioning airbag 5 can be locked inside the outer sleeve 1 when the outer sleeve 1 is installed.

[0032] Furthermore, such as Figure 3 As shown, the upper outer ring of the inner sleeve 10 is provided with a connecting thread 11, the top of the outer sleeve 1 is engaged with the connecting thread 11, the inner sleeve 10 is provided with a limiting ring 12 above the connecting thread 11, and a sealing ring 13 is provided on the side of the limiting ring 12 facing the end of the outer sleeve 1.

[0033] Specifically, the outer sleeve 1 is fixedly installed between the inner sleeve 10 and the connecting thread 11. The sealing effect of the upper end of the tubular cavity is ensured by the limiting ring 12 and the sealing ring 13, so as to ensure that no air leakage occurs when the air is inflated into the tubular cavity through the air valve 22, and to ensure the reliable opening and positioning of the positioning airbag 5.

[0034] Furthermore, such as Figure 2 , Figure 4 As shown, the inner sleeve 10 has anti-slip grooves 100 evenly distributed on its surface, and the mating rubber sleeve 50 has protrusions that cooperate with the anti-slip grooves 100. The air guide tube 51 passes through the top of the mating rubber sleeve 50 and communicates with the air valve 22.

[0035] Specifically, due to the different thicknesses of the abdominal wall and the depth of fluid accumulation, the height of the positioning airbag 5 relative to the outer tube 1 needs to be flexibly adjusted. In order to ensure that the positioning airbag 5 does not slip relative to the outer tube 1 before and after adjustment, a protrusion is provided on the inner tube 10 so that the rubber sleeve 50 cooperates with the protrusion. Under its own elasticity, the rubber sleeve 52 will also shrink and adhere to the outer wall of the inner tube 10. The rubber sleeve 52 and the positioning airbag 5 that protrude from the end of the tubular cavity need to be stretched and expanded to cover the outer wall of the outer tube 1, which further ensures the reliable positioning of the positioning airbag 5 after adjustment.

[0036] Furthermore, such as Figure 2 , Figure 7 As shown, a puncture control assembly 3 is provided inside the handle portion 2. The puncture control assembly 3 includes a control rod 62 located at the top of the puncture tube 6. The outer circumference of the control rod 62 is uniformly provided with annular protrusions 620. A pressing block 30 is provided on the handle portion 2. The portion of the pressing block 30 located inside the handle is connected to a connecting flange 36. A insertion post 37 is provided on the inner side of the handle portion 2. The connecting flange 36 and the insertion post 37 are interlocked. A return spring 38 is provided between the two parts. A push plate 31 is provided on the pressing block 30. A mating hole 39 is provided at the end of the push plate 31. The control rod 62 passes through the mating hole 39 and extends to the top of the handle part 2. A central tube 32 is provided at the center of the handle part 2. A positioning plate 33 is provided inside the central tube 32. The control rod 62 passes through the positioning plate 33 and is connected to a pressing protrusion 34. A return spring 35 is sleeved on the control rod 62 between the positioning plate 33 and the pressing protrusion 34.

[0037] Specifically, to avoid the drawback of the puncture head 61 being mistakenly inserted in the drainage area, after the puncture head 61 reaches the drainage area, the push plate 31 is moved by the pressing block 30, so that the mating hole 39 is disengaged from the annular protrusion 620 on the control rod 62. The control rod 62 is raised under the action of the return spring 35, thereby driving the entire puncture tube 6 below to rise, so that the puncture head 61 is retracted into the inner cannula 10, thus avoiding damage to the abdominal cavity caused by the puncture head 61 during drainage.

[0038] Furthermore, the mating hole 39 is provided with a groove that mates with the annular protrusion 620, and the pressing blocks 30 are symmetrically arranged on both sides of the handle portion 2.

[0039] Specifically, a groove is provided in the mating hole 39 to cooperate with the annular protrusion 620, which ensures that the control rod 62 is reliably positioned under the limit of the mating hole 39, and prevents the control rod 62 from sliding between the mating hole 39 during the insertion of the puncture tube 6. The pressing blocks 30 are symmetrically arranged so that the two sets of push plates 31 and the mating hole 39 are in a cross state to limit the control rod 62, further ensuring the reliable positioning of the control rod 62.

[0040] Furthermore, such as Figure 2 , Figure 8 As shown, a mating piston 66 is provided on the inner side of the puncture tube 6, and a flow guiding hose 65 is provided on the mating piston 66. The flow guiding hose 65 passes through the top of the puncture tube 6 and is connected to the connecting hose 64. The puncture tube 6 is connected to the air valve 22 through the connecting hose 64. A connecting steel wire 63 is provided on the mating piston 66. The connecting steel wire 63 passes through the top of the puncture tube 6 and extends to the outside of the handle part 2. A pull ring is provided at the end of the connecting steel wire 63.

[0041] Specifically, when the amount of fluid in the abdominal cavity is small, the thicker puncture tube 6 cannot completely remove the fluid. The connecting steel wire 63 controls the movement of the matching piston 66 inside the puncture tube 6, causing the matching piston 66 to move downward. After a small amount of fluid enters the puncture tube 6, it directly enters the connecting tubing 64, avoiding the negative pressure state caused by excessive air suction during drainage. This prevents the abdominal wall tissues from sticking together and also prevents tissues from adsorbing onto the puncture head 61 and blocking the fluid extraction port.

[0042] Furthermore, such as Figure 6 As shown, a positioning ring 222 is provided on the inner side of the air valve 22, and a support spring 221 is connected to the positioning ring 222. A rubber plug 220 is provided at the end of the support spring 221 and the air valve 22.

[0043] Specifically, when the positioning airbag 5 needs to be inflated, it should be directly connected to the air valve 22. The air pressure will push open the rubber plug 220 to inflate the air valve 22. After inflation stops, the rubber plug 220 will block the air valve 22 under the action of the support spring 221 to prevent gas leakage. When deflation is needed, the rubber plug 220 can be directly pushed open.

[0044] Furthermore, such as Figure 2 As shown, the outer wall of the outer sleeve 1 is uniformly provided with anti-slip grooves 100, and the positioning rubber ring 4 and the positioning airbag 5 cooperate with each other with the anti-slip grooves 100.

[0045] Specifically, the outer tube 1 is provided with anti-slip grooves 100, which can further prevent the positioning rubber ring 4 and the positioning airbag 5 from sliding relative to the outer tube 1, ensuring the positioning effect of the trocar relative to the abdominal wall and preventing the trocar from sliding axially.

[0046] Furthermore, such as Figure 2 As shown, a positioning sleeve 60 is provided between the puncture tube 6 and the inner sheath 10, and a sealing sleeve is provided between the ends of the puncture tube 6 and the inner sheath 10.

[0047] Specifically, a sealing sleeve is provided between the ends of the puncture tube 6 and the inner cannula 10 to prevent fluid from entering the cavity between the puncture tube 6 and the inner cannula 10 after the puncture device is inserted into the abdominal cavity, and to further prevent fluid from flowing into the handle part 2, which facilitates the subsequent disassembly, cleaning and disinfection of the puncture device.

[0048] The working principle of this invention embodiment is as follows:

[0049] like Figures 1-8As shown, when a drainage trocar is needed to drain fluid from the abdominal cavity, the depth of the fluid-containing area and the thickness of the abdominal wall are first initially determined using the trocar 6. Based on this depth, the position of the rubber sleeve 50 on the inner cannula 10 is adjusted. Then, the outer cannula 1 is fitted onto the inner cannula 10. The rubber sleeve 52 and the positioning balloon 5 at its end pass through the outer cannula 1. After the outer cannula 1 and the inner cannula are installed, the rubber sleeve 52 and the positioning balloon 5 extending from the tubular cavity end are turned outwards and wrapped around the outside of the outer cannula 1, causing the positioning balloon 5 to be pushed upwards along the outer cannula 1, so that the rubber sleeve 52 is fully extended. At this point, the distance between the positioning balloon 5 and the end of the trocar 6 is equal to the previously measured depth of the fluid-containing area in the abdominal cavity minus the thickness of the abdominal wall. Subsequently, air is inflated into the positioning balloon 5 using the air valve 22. The positioning rubber ring 4 and the positioning balloon 5 are used to fix the drainage trocar to the abdominal wall. The puncture head 61 is positioned at the site of abdominal effusion for drainage. At the same time, medication can be injected into the surgical site through the drainage nozzle 21. The outer cannula 1 is fixedly installed with the inner cannula 10 through the connecting thread 11. The upper end of the tubular cavity is sealed by the limiting ring 12 and the sealing ring 13, thereby ensuring that no air leakage occurs when air is subsequently inflated into the tubular cavity through the air valve 22, and ensuring the reliable opening and positioning of the positioning balloon 5. Due to the different thicknesses of the abdominal wall and the depth of fluid accumulation, the height of the positioning airbag 5 relative to the outer tube 1 needs to be flexibly adjusted. In order to ensure that the positioning airbag 5 does not slip relative to the outer tube 1 before and after adjustment, a protrusion is provided on the inner tube 10 so that the rubber sleeve 50 cooperates with the protrusion. Under its own elasticity, the rubber sleeve 52 will also shrink and adhere to the outer wall of the inner tube 10. The rubber sleeve 52 and the positioning airbag 5 that protrude from the end of the tubular cavity need to be stretched and expanded to cover the outer wall of the outer tube 1, which further ensures the reliable positioning of the positioning airbag 5 after adjustment. To avoid the drawback of accidental insertion of the puncture head 61 into the drainage area, after the puncture head 61 reaches the drainage site, the push plate 31 is moved by the pressing block 30, causing the mating hole 39 to disengage from the annular protrusion 620 on the control rod 62. The control rod 62 rises under the action of the return spring 35, thereby causing the entire puncture tube 6 below to rise, thus retracting the puncture head 61 into the inner cannula 10, preventing damage to the abdominal cavity by the puncture head 61 during drainage. When the amount of fluid in the abdominal cavity is small, the thicker puncture tube 6 cannot completely clear the fluid. The mating piston 66 is controlled by the connecting wire 63 to move within the puncture tube 6, causing the mating piston 66 to move downward. A small amount of fluid enters the puncture tube 6 and then directly enters the connecting tubing 64, avoiding the suction of too much air and creating a negative pressure state during drainage. This prevents the abdominal wall tissues from adhering to each other and also prevents tissue from adsorbing onto the puncture head 61 and blocking the fluid extraction port.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drainage trocar for abdominal surgery, comprising a trocar (6), wherein the upper end of the trocar (6) is connected to a drainage nozzle (21), and the lower end of the trocar (6) is connected to a trocar tip (61), characterized in that, The puncture tube (6) is fitted with an inner tube (10) and an outer tube (1). The top of the inner tube (10) is provided with a handle (2). A tubular cavity is formed between the outer tube (1) and the inner tube (10). The upper end of the tubular cavity is closed and a matching rubber sleeve (50) is adjustablely installed inside the tubular cavity. The matching rubber sleeve (50) and the upper end of the tubular cavity form a sealed space. An air valve (22) is connected to the sealed space. A rubber sleeve (52) is connected to the matching rubber sleeve (50). The rubber sleeve (52) The tube extends to the bottom of the tubular cavity and is connected to a positioning airbag (5). After the positioning airbag (5) passes through the tubular cavity, it is turned outward and fitted onto the outside of the outer sleeve. Multiple sets of air-guiding tubes (51) are evenly distributed between the mating rubber sleeve (50) and the rubber sleeve (52). The end of the air-guiding tube (51) extends into the positioning airbag (5). A positioning rubber ring (4) is fitted onto the outer sleeve (1). After the positioning airbag (5) is inflated, it and the positioning rubber ring (4) are distributed on the inner and outer sides of the abdominal wall, so that the trocar is fixed on the abdominal wall. The inner sleeve (10) is uniformly provided with anti-slip groove 1 (100) on its surface, and the mating rubber sleeve (50) is provided with a protrusion that cooperates with the anti-slip groove 1 (100). The air guide tube (51) passes through the top of the mating rubber sleeve (50) and communicates with the air valve (22).

2. The drainage trocar for abdominal surgery according to claim 1, characterized in that, The upper outer ring of the inner sleeve (10) is provided with a connecting thread (11), the top of the outer sleeve (1) is engaged with the connecting thread (11), the inner sleeve (10) is provided with a limiting ring (12) above the connecting thread (11), and the limiting ring (12) is provided with a sealing ring (13) on the side facing the end of the outer sleeve (1).

3. The abdominal surgical drainage trocar according to claim 1, characterized in that, The handle (2) is provided with a puncture control component (3), which includes a control rod (62) located at the top of the puncture tube (6). The outer ring of the control rod (62) is uniformly provided with annular protrusions (620). A pressing block (30) is provided on the handle (2). A connecting flange (36) is connected to the portion of the pressing block (30) located inside the handle. A plug-in post (37) is provided on the inner side of the handle (2). The connecting flange (36) and the plug-in post (37) are interlocked. A space is provided between the plug-in post (37) and the connecting flange (36). Return spring 2 (38), the pressing block (30) is provided with a push plate (31), the end of the push plate (31) is provided with a mating hole (39), the control rod (62) passes through the mating hole (39) and extends to the top of the handle part (2), the center part of the handle part (2) is provided with a central tube (32), the central tube (32) is provided with a positioning plate (33), the control rod (62) passes through the positioning plate (33) and is connected to a pressing protrusion (34), and a return spring 1 (35) is sleeved on the control rod (62) between the positioning plate (33) and the pressing protrusion (34).

4. The abdominal surgical drainage trocar according to claim 3, characterized in that, The mating hole (39) is provided with a groove that mates with the annular protrusion (620), and the pressing block (30) is symmetrically arranged on both sides of the handle (2).

5. The abdominal surgical drainage trocar according to claim 1, characterized in that, The inner side of the puncture tube (6) is provided with a matching piston (66), and a flow guiding hose (65) is provided on the matching piston (66). The flow guiding hose (65) passes through the top of the puncture tube (6) and is connected to the connecting hose (64). The puncture tube (6) is connected to the air valve (22) through the connecting hose (64). A connecting wire (63) is provided on the matching piston (66). The connecting wire (63) passes through the top of the puncture tube (6) and extends to the outside of the handle part (2). A pull ring is provided at the end of the connecting wire (63).

6. The abdominal surgical drainage trocar according to claim 5, characterized in that, A positioning ring (222) is provided on the inner side of the air valve (22), and a support spring (221) is connected to the positioning ring (222). A rubber plug (220) is provided at the end of the support spring (221) and the air valve (22).

7. The abdominal surgical drainage trocar according to claim 1, characterized in that, The outer wall of the outer sleeve (1) is uniformly provided with anti-slip grooves II, and the positioning rubber ring (4) and the positioning airbag (5) cooperate with each other in anti-slip grooves II.

8. The abdominal surgical drainage trocar according to claim 1, characterized in that, A positioning sleeve (60) is provided between the puncture tube (6) and the inner sheath (10), and a sealing sleeve is provided between the ends of the puncture tube (6) and the inner sheath (10).

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