A pressure-stabilized laparoscopic trocar

Abstract

This utility model discloses a pressure-stabilized laparoscopic puncture device, including a cannula assembly (1), a sealing cap (2), and a puncture cone (3). The cannula assembly (1) includes a cannula cap (101) and a pressure-stabilizing valve body (102). The side wall of the cannula cap (101) is provided with a valve body mounting groove (1011), and the pressure-stabilizing valve body (102) is installed in the valve body mounting groove (1011). The side wall of the cannula cap (101) is also provided with a cap air inlet passage (1012) and a cap exhaust passage (1013). Air is supplied to the pneumoperitoneum through the air inlet passage of the cannula assembly (1), and the pneumoperitoneum pressure is regulated and controlled through the exhaust passage. The pressure-stabilizing structure of this solution is adjustable, and the set pressure can be adjusted by turning the pressure knob to adapt to the protection of pneumoperitoneum at any pressure. When the pressure inside the pneumoperitoneum exceeds the set pressure, it is quickly discharged through the pressure-stabilizing structure.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a pressure-stabilized laparoscopic puncture device. Background Technology

[0002] A trocar is a minimally invasive surgical instrument used in surgery to penetrate the abdominal wall and create a passage for surgical instruments to enter and exit the abdominal cavity. The performance of the trocar has a significant impact on the success of the surgery and the operation time. Trocars are widely used in various minimally invasive abdominal surgeries. When performing surgery within the abdominal cavity, it is necessary to establish pneumoperitoneum. The main purpose of the trocar is to penetrate the entire thickness of the abdominal wall, inflate the abdominal cavity with carbon dioxide gas to establish a stable pneumoperitoneum environment, and create a passage between the outside and the abdominal cavity. This allows surgical instruments to enter the abdominal cavity through the trocar cannula, thus providing sufficient field of vision and operating space for the surgical procedure.

[0003] To establish a suitable surgical environment, it is necessary to maintain a constant pressure in the pneumoperitoneum. During intra-abdominal surgery, the pneumoperitoneum machine is connected to the trocar, and air is inflated into the abdominal cavity through the trocar to establish pneumoperitoneum. The safe pressure for pneumoperitoneum is generally 8-15 mmHg. During the operation, air leakage may occur, causing a drop in pressure. To maintain the pneumoperitoneum pressure, the pneumoperitoneum machine needs to inflate intermittently. Currently, maintaining the pneumoperitoneum pressure relies entirely on the control of the pneumoperitoneum machine. Due to the delay in the pneumoperitoneum machine's pressure sensing, over-inflation can occur, causing the pneumoperitoneum pressure to exceed the set safe pressure and resulting in injury to the patient.

[0004] Currently, the main function of commonly used laparoscopic trocars on the market is to establish instrument channels for minimally invasive surgery; they do not have pressure stabilization capabilities. During surgery, especially in pediatric laparoscopic surgery, strict control of intra-abdominal pressure is crucial. Excessive pneumoperitoneum pressure can cause greater harm to the body and increase the probability of postoperative complications.

[0005] How to solve the clinical safety risks caused by the fluctuation of pneumoperitoneum pressure during trocar surgery using existing technologies is a technical problem that urgently needs to be solved. Utility Model Content

[0006] The technical problem to be solved by this invention is to address the lack of pressure stabilization function in existing puncture devices.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0008] A pressure-controlled laparoscopic trocar includes a cannula assembly (1), a sealing cap (2), and a trocar (3), wherein the sealing cap (2) is screwed onto the upper part of the cannula assembly (1); the trocar (3) is inserted into the cannula assembly (1) through an instrument port of the sealing cap (2); characterized in that,

[0009] The bushing assembly (1) includes a bushing cover (101) and a pressure regulating valve body (102).

[0010] The sleeve cover (101) has a valve body mounting groove (1011) on its side wall, and the pressure stabilizing valve body (102) is installed in the valve body mounting groove (1011);

[0011] The sleeve cover (101) sidewall is also provided with a cover air inlet passage (1012) and a cover exhaust passage (1013); correspondingly, the pressure regulating valve body (102) is provided with a valve body air inlet passage (1021) and a valve body exhaust passage (1022).

[0012] The upper cover air inlet passage (1012) is connected to the valve body air inlet passage (1021) to form an air inlet channel, and the upper cover exhaust passage (1013) is connected to the valve body exhaust passage (1022) to form an exhaust channel; air is supplied to the pneumoperitoneum through the air inlet channel of the sleeve assembly (1), and the pneumoperitoneum pressure is regulated and controlled through the exhaust channel.

[0013] Furthermore, a pressure regulating mechanism is provided within the valve body exhaust passage (1022), the pressure regulating mechanism comprising:

[0014] Pressure rod (104), pressure spring (105), pressure regulator (106);

[0015] The pressure rod (104), pressure spring (105), and pressure regulator (106) are sequentially installed in the valve body exhaust passage (1022) of the pressure stabilizing valve body.

[0016] Furthermore, one end of the pressure rod (104) is connected to the pressure spring (105);

[0017] The other end of the pressure rod (104) is provided with a sealing block (1042), which rests on the step (1027) of the pressure regulating valve body (102);

[0018] The pressure regulator (106) is provided with a limiting protrusion (1061), and a corresponding limiting groove 1 (023) is provided in the valve body exhaust passage (1022). The limiting protrusion (1061) and the limiting groove (1023) cooperate to allow the pressure regulator (106) to move axially in the exhaust passage.

[0019] Furthermore, the pressure regulating mechanism also includes a pressure knob (107).

[0020] The pressure knob (107) is provided with an inclined rail (1071);

[0021] The pressure regulator (106) has an adjusting rod (1062) on one side, and the adjusting rod (1062) rests on the inclined rail (1071) on the pressure knob (107);

[0022] The compression of the pressure spring (105) is changed by adjusting the pressure knob (107) to adjust the required exhaust pressure threshold of the pressure rod (104).

[0023] Furthermore, a valve core (103) is provided in the air intake passage (1021) of the valve body;

[0024] The valve core (103) has a limiting groove (1031) at its end, and a corresponding protrusion is provided in the valve body air inlet passage (1021). When the valve core (103) is installed in the valve body air inlet passage (1021), the valve core (103) is locked by the protrusion in the valve body air inlet passage (1021), and the valve core air inlet (1032) is connected to the valve body air inlet passage (1021) to form a passage.

[0025] Furthermore, the sleeve assembly also includes a locking cap (108) and a vent valve (109);

[0026] The locking and fixing cover (108) is installed on the upper end of the sleeve cover (101).

[0027] The air-blocking valve (109) is located between the locking cover (108) and the upper cover of the sleeve (101).

[0028] Furthermore, the sleeve assembly also includes a sleeve channel (110), on which a buckle (1101) is provided, and the sleeve channel is screwed onto the lower end of the sleeve cover (101) by the buckle (1101).

[0029] Furthermore, the diameter of the sealing block (1042) is smaller than the inner diameter of the valve body exhaust passage (1022);

[0030] When the pneumoperitoneum pressure exceeds the set value, the sealing block (1042) separates from the step (1027) to form an exhaust gap.

[0031] Furthermore, the spring force of the pressure spring (105) can be adjusted by rotating the pressure knob (107);

[0032] When the pressure in the pneumoperitoneum exceeds the spring force, the pressure rod (104) is pushed open, the exhaust passage is opened, and excess gas in the pneumoperitoneum flows out.

[0033] When the pressure returns to below the set value, the sealing block (1042) at one end of the pressure rod (104) presses against the step (1027) of the pressure regulating valve body, and the exhaust passage is closed.

[0034] Furthermore, the outer wall of the sleeve channel (110) has a sawtooth structure (1102).

[0035] With this design, the present invention has at least the following advantages:

[0036] (1) The pressure of the pressure stabilizing structure of this solution is adjustable. The set pressure can be adjusted by turning the pressure knob to adapt to the protection of any pressure pneumatic abdomen. When the pressure inside the pneumatic abdomen exceeds the set pressure, it is quickly discharged through the pressure stabilizing structure.

[0037] (2) This utility model has a simple structure, good effect, low cost and easy process implementation. Attached Figure Description

[0038] The above is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, the following describes this utility model in further detail with reference to the accompanying drawings and specific embodiments.

[0039] Figure 1 This is an overall structural diagram of the puncture device according to an embodiment of the present invention;

[0040] Figure 2 This is a partial cross-sectional schematic diagram of the sleeve assembly 1 according to an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the sleeve assembly 1 according to an embodiment of the present invention;

[0042] Figure 4 This is an exploded structural diagram of the sleeve assembly 1 according to an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram of the structure of the sleeve cover 101 according to an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the structure of the pressure regulating valve body 102 according to an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of the valve core 103 structure according to an embodiment of the present invention;

[0046] Figure 8 This is a schematic diagram of the pressure rod 104 according to an embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of the structure of a pressure spring 105 according to an embodiment of the present invention;

[0048] Figure 10 This is a schematic diagram of the pressure regulator 106 according to an embodiment of the present invention;

[0049] Figure 11 This is a schematic diagram of the structure of the pressure knob 107 according to an embodiment of the present invention;

[0050] Figure 12 This is a schematic diagram of the locking and fixing cover 108 according to an embodiment of the present invention;

[0051] Figure 13 This is a schematic diagram of the structure of the air-blocking valve 109 according to an embodiment of the present invention;

[0052] Figure 14 This is a schematic diagram of the sleeve channel 110 structure according to an embodiment of the present invention;

[0053] Figure 15 This is a schematic diagram of an O-ring structure according to an embodiment of the present invention;

[0054] Figure 16 This is a schematic diagram of the sealing cover 2 structure according to an embodiment of the present invention;

[0055] Figure 17 This is a schematic diagram of the puncture cone 3 structure according to an embodiment of the present invention;

[0056] Reference numerals in the attached drawings: 1. Sleeve assembly; 2. Sealing cap; 3. Puncture cone; 101. Sleeve cap; 1011. Valve body mounting groove; 1012. Inlet passage; 1013. Exhaust passage; 102. Pressure regulating valve body; 1021. Inlet passage; 1022. Exhaust passage; 1023. Limiting groove; 1024. Luer connector; 1025. Main exhaust port; 1026. Pressure regulating exhaust port; 1027. Step; 103. Valve core; 103. Limiting groove; 1031. Inlet; 103. 2. Valve core knob 1033, pressure rod 104, rod body 1041, silicone sealing block 1042, pressure spring 105, pressure regulator 106, limit protrusion 1061, adjusting rod 1062, sleeve 1063, pressure knob 107, inclined rail 1071, knob head 1072, locking cover 108, air stop valve 109, sleeve channel 110, buckle 1101, serrated structure 1102, O-ring 111. Detailed Implementation

[0057] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0058] In this article, terms such as "upper" and "lower" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0059] In the following description, the end of each component closer to the operator is defined as the distal end, and the end farther from the operator is defined as the proximal end. These terms "proximal end" and "distal end" are used only for simplicity and clarity and should not be construed as limiting the scope of this invention.

[0060] See appendix Figure 1-17 One embodiment of the pressure-stabilized laparoscopic trocar includes: a cannula assembly 1, a sealing cap 2, and a puncture cone 3; specifically, the sealing cap 2 is screwed onto the cannula assembly 1, and the puncture cone 3 is inserted into the cannula assembly 1 through the instrument hole of the sealing cap 2.

[0061] The bushing assembly 1 includes a bushing cover 101 and a pressure regulating valve body 102;

[0062] The sleeve cover 101 has a valve body mounting groove 1011, a cover air inlet passage 1012 and a cover exhaust passage 1013 on its side wall. Correspondingly, the pressure regulating valve body 102 has a valve body air inlet passage 1021 and a valve body exhaust passage 1022.

[0063] Specifically, the pressure regulating valve body 102 is installed in the valve body mounting groove 1011 of the sleeve cover 101, so that the upper cover air inlet passage 1012 of the sleeve cover 101 and the valve body air inlet passage 1021 of the pressure regulating valve body 102 are connected to form an air inlet channel, and the upper cover exhaust passage 1013 of the sleeve cover 101 and the valve body exhaust passage 1022 of the pressure regulating valve body 102 are also effectively connected to form an exhaust channel.

[0064] Air is supplied to the pneumoperitoneum through the air inlet channel of the sleeve assembly, and the pneumoperitoneum pressure is regulated and controlled through the exhaust channel.

[0065] On the one hand, the sleeve assembly 1 also includes a valve core 103, which is installed in the valve body inlet passage 1021 of the pressure regulating valve body 102;

[0066] Here, the valve core 103 is provided with a valve core limiting groove 1031 at its end. Correspondingly, a protrusion is provided in the valve body air inlet passage 1021. When the valve core 103 is installed in the valve body air inlet passage 1021 of the pressure stabilizing valve body 102, the valve core 103 is locked by the protrusion in the valve body air inlet passage 1021, thereby connecting the valve core air inlet 1032 of the valve core 103 with the valve body air inlet passage 1021 of the pressure stabilizing valve body 102. The valve core air inlet 1032 and the valve body air inlet passage 1021 form a passage.

[0067] Here, the valve core 103 also includes a valve core toggle 1033 for toggling the valve core 103.

[0068] On the other hand, in order to realize the function of regulating the pressure of the pneumoperitoneum, a pressure regulating mechanism is provided in the valve body exhaust passage 1022. The pressure regulating mechanism includes a pressure rod 104, a pressure spring 105, and a pressure regulator 106. Each component is installed in sequence in the valve body exhaust passage 1022 of the pressure stabilizing valve body 102.

[0069] Specifically, the rod 1041 of the pressure rod 104 is inserted into the sleeve 1063 of the pressure regulator 106 with the pressure spring 105. The other end of the pressure rod 104 is provided with a sealing block 1042, which is a silicone sealing block. The sealing block 1042 rests on the step 1027 of the pressure regulating valve body 102. The diameter of the silicone sealing block 1042 of the pressure rod 104 is smaller than the diameter of the exhaust passage 1022.

[0070] The pressure regulator 106 is inserted into the exhaust passage 1022 of the pressure stabilizing valve body 102. The pressure regulator 106 is provided with a limiting protrusion 1061, and the exhaust passage 1022 of the pressure stabilizing valve body 102 is provided with a limiting groove 1023. The limiting protrusion 1061 and the limiting groove 1023 cooperate to allow the pressure regulator 106 to move axially in the exhaust passage 1022, and the rotational movement is effectively limited.

[0071] Here, the pressure regulating valve body 102 also includes a Luer connector 1024 for connecting to the intake pipe.

[0072] The pressure regulating valve body 102 also includes a main exhaust port 1025, which is used to exhaust gas from the pneumoperitoneum after surgery.

[0073] Furthermore, the pressure regulating mechanism also includes a pressure knob 107 for adjusting the unloading critical pressure of the pressure stabilizing structure. The pressure knob 107 includes a knob head 1072 and an inclined rail 1071. The pressure knob 107 is installed on the exhaust passage 1022. The pressure regulator 106 has an adjusting rod 1062 on one side, which rests on the inclined rail 1071 on the pressure knob 107.

[0074] By rotating the pressure knob 107, the position of the adjusting rod 1062 on the inclined track 1071 can be changed, thereby compressing or releasing the pressure spring 105 and adjusting the inflatable pressure threshold required to open the pressure rod 104.

[0075] Due to the action of the pressure spring 105, the silicone sealing block 1042 at one end of the pressure rod 104 rests against the step 1027 of the pressure stabilizing valve body 102. When the trocar is inserted into the pneumoperitoneum, if the pneumoperitoneum pressure is greater than the set elastic force of the pressure spring 105, the gas pressure inside the pneumoperitoneum will push the pressure rod 104 open. Since the diameter of the silicone sealing block 1042 at one end of the pressure rod 104 is smaller than the diameter of the exhaust passage 1022, the exhaust passage 1022 will open immediately, and excess gas will pass through the silicone sealing block 1042. The gas flows through the gap between 42 and the exhaust passage 1022 to the pressure stabilizing exhaust port 1026 to relieve pressure. At this time, excess gas in the pneumoperitoneum flows out, and the pneumoperitoneum pressure returns to the set pressure value of the pressure stabilizing structure. When the gas pressure in the pneumoperitoneum is not greater than the elastic force of the pressure spring 105, the pressure rod 104 resets under the action of the pressure spring 105, the silicone sealing block 1042 presses against the step 1027 of the pressure stabilizing valve body 102 again, the exhaust passage 1022 is closed, and the pneumoperitoneum pressure is kept stable.

[0076] Here, the pneumoperitoneum pressure setting varies for different populations. The safe pneumoperitoneum pressure is generally between 8-15 mmHg. To broaden the applicability of the trocar, this application design incorporates an inclined rail 1071 for the pressure knob 107, and an adjusting rod 1062 on one side of the pressure regulator 106 rests on the inclined rail 1071. When the pressure knob 107 rotates clockwise, the adjusting rod 1062 rests on the more convex position of the inclined rail 1071, compressing the pressure spring 105 and increasing the spring force, thus increasing the pneumoperitoneum pressure required to open the pressure lever 104. When the pressure knob 107 rotates counterclockwise, the adjusting rod 1062 rests on the more concave position of the inclined rail 1071, releasing the pressure spring 105 and decreasing the spring force, thus decreasing the pneumoperitoneum pressure required to open the pressure lever 104. By adjusting the pressure knob 107, the exhaust force can be set, making the trocar suitable for pneumoperitoneum at any pressure.

[0077] Furthermore, the sleeve assembly 1 also includes a locking cap 108 and an air valve 109.

[0078] The locking and fixing cover 108 is installed on the upper end of the cannula cover 101, and the gas-blocking valve 109 is installed on the locking and fixing cover 108. The gas-blocking valve 109 has a cross-shaped opening structure, which seals the gas at the upper end of the puncture cannula. When the surgical instrument is inserted, it can break through the cross-shaped opening structure to enter the pneumoperitoneum.

[0079] The casing assembly 1 also includes a casing channel 110 and an O-ring 111.

[0080] The sleeve channel 110 has a buckle 1101. The sleeve channel 110 is screwed to the lower end of the sleeve cover 101 by the buckle 1101. In order to increase the airtightness, an O-ring 111 is placed in the middle to make the gas sealing effect better, thereby achieving the isolation of the assembly interface of the puncture sleeve from the outside gas.

[0081] Furthermore, the outer wall of the cannula channel 110 has a serrated structure 1102. When the pneumoperitoneum is inserted, the serrated structure 1102 contacts the abdominal wall hole, increasing friction and preventing the trocar from shifting.

[0082] The working process of a pressure-stabilized laparoscopic trocar according to an embodiment of this utility model is as follows:

[0083] During operation, the pressure-stabilized laparoscopic trocar of this application continuously supplies gas into the pneumoperitoneum through the valve body air inlet passage 1021 to maintain the surgical operating space. Here, the pneumoperitoneum pressure is set to 15 mmHg. This is achieved by adjusting the pressure knob to raise the pressure relief threshold set by the pressure regulating mechanism above this preset value, thereby realizing the pressure over-limit release function. Specifically, pressure will be released when it exceeds 15 mmHg.

[0084] When the actual pressure inside the pneumoperitoneum exceeds 15 mmHg, the excess gas will trigger a pressure regulation mechanism along a specific path. Specifically, the high-pressure gas flow inside the pneumoperitoneum first enters through the lower end of the instrument port of the sleeve assembly 1, and then enters the pressure regulating mechanism through the exhaust passage 1013 of the upper cover 101 of the sleeve. The pressure regulating mechanism includes a pressure rod 104, a pressure spring 105, and a pressure regulator 106. When the pneumoperitoneum pressure exceeds the preload of the pressure spring 105, the thrust generated by the high-pressure gas pushes the pressure rod 104 open. Since the diameter of the silicone sealing block 1042 at one end of the pressure rod 104 is smaller than the diameter of the exhaust passage 1022, the exhaust passage 1022 opens. The annular gap formed between the two constitutes a gas flow channel, allowing excess gas to flow through the gap between the silicone sealing block 1042 and the exhaust passage 1022 to the pressure-stabilizing exhaust port 1026, thereby achieving rapid release of the pneumoperitoneum pressure.

[0085] At this time, excess gas in the pneumoperitoneum flows out. As the gas is expelled, the pneumoperitoneum pressure gradually decreases and returns to the set pressure value of the pressure stabilizing structure. When the gas pressure in the pneumoperitoneum is not greater than the set elastic force of the pressure spring 105, the pressure rod 104 resets under the action of the spring's restoring force, and the silicone sealing block 1042 presses against the step 1027 of the pressure stabilizing valve body 102 again, blocking the exhaust passage 1022. The exhaust passage 1022 is closed, thereby stabilizing the pneumoperitoneum pressure at the preset level of 15 mmHg, ensuring the safety and stability of the surgical operation environment.

[0086] The puncture device described in this utility model has at least the following advantages:

[0087] (1) The pressure of the pressure stabilizing structure of this solution is adjustable. The set pressure can be adjusted by turning the pressure knob to adapt to the protection of any pressure pneumatic abdomen. When the pressure inside the pneumatic abdomen exceeds the set pressure, it is quickly discharged through the pressure stabilizing structure.

[0088] (2) This utility model has a simple structure, good effect, low cost and easy process implementation.

[0089] Those skilled in the art will readily conceive of other embodiments of the present invention upon considering the utility model disclosed in the specification and embodiments. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

[0090] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A pressure-controlled laparoscopic trocar, comprising a cannula assembly (1), a sealing cap (2), and a trocar (3), wherein the sealing cap (2) is screwed onto the upper part of the cannula assembly (1); the trocar (3) is inserted into the cannula assembly (1) through an instrument port of the sealing cap (2); characterized in that, The sleeve assembly (1) includes a sleeve cover (101) and a pressure regulating valve body (102). The sleeve cover (101) has a valve body mounting groove (1011) on its side wall, and the pressure stabilizing valve body (102) is installed in the valve body mounting groove (1011); The sleeve cover (101) sidewall is also provided with a cover air inlet passage (1012) and a cover exhaust passage (1013); correspondingly, the pressure regulating valve body (102) is provided with a valve body air inlet passage (1021) and a valve body exhaust passage (1022). The upper cover air inlet passage (1012) is connected to the valve body air inlet passage (1021) to form an air inlet channel, and the upper cover exhaust passage (1013) is connected to the valve body exhaust passage (1022) to form an exhaust channel; air is supplied to the pneumoperitoneum through the air inlet channel of the sleeve assembly (1), and the pneumoperitoneum pressure is regulated and controlled through the exhaust channel.

2. The puncture device according to claim 1, characterized in that: A pressure regulating mechanism is provided in the valve body exhaust passage (1022), the pressure regulating mechanism including: Pressure rod (104), pressure spring (105), pressure regulator (106); The pressure rod (104), pressure spring (105), and pressure regulator (106) are sequentially installed in the valve body exhaust passage (1022) of the pressure stabilizing valve body.

3. The puncture device according to claim 2, characterized in that: One end of the pressure rod (104) is connected to the pressure spring (105); the other end of the pressure rod (104) is provided with a sealing block (1042), and the sealing block (1042) rests on the step (1027) of the pressure regulating valve body (102); The pressure regulator (106) is provided with a limiting protrusion (1061), and a corresponding limiting groove (1023) is provided in the valve body exhaust passage (1022). The limiting protrusion (1061) and the limiting groove (1023) cooperate to allow the pressure regulator (106) to move axially in the exhaust passage.

4. The puncture device according to claim 3, characterized in that: The pressure regulating mechanism also includes a pressure knob (107). The pressure knob (107) is provided with an inclined rail (1071). The pressure regulator (106) has an adjusting rod (1062) on one side, and the adjusting rod (1062) rests on the inclined rail (1071) on the pressure knob (107); The compression of the pressure spring (105) is changed by adjusting the pressure knob (107) to adjust the required exhaust pressure threshold of the pressure rod (104).

5. The puncture device according to claim 4, characterized in that: A valve core (103) is provided inside the air intake passage (1021) of the valve body. The valve core (103) has a limiting groove (1031) at its end, and a corresponding protrusion is provided in the valve body air inlet passage (1021). When the valve core (103) is installed in the valve body air inlet passage (1021), the valve core (103) is locked by the protrusion in the valve body air inlet passage (1021), and the air inlet (1032) of the valve core (103) is connected to the valve body air inlet passage (1021) to form a passage.

6. The puncture device according to claim 5, characterized in that: The sleeve assembly also includes a locking cap (108) and a vent valve (109). The locking and fixing cover (108) is installed on the upper end of the sleeve cover (101). The air-blocking valve (109) is located between the locking cover (108) and the sleeve cover (101).

7. The puncture device according to claim 6, characterized in that: The sleeve assembly also includes a sleeve channel (110), on which a buckle (1101) is provided, and the sleeve channel is screwed onto the lower end of the sleeve cover (101) by the buckle (1101).

8. The puncture device according to claim 7, characterized in that: The diameter of the sealing block (1042) is smaller than the inner diameter of the valve body exhaust passage (1022); When the pneumoperitoneum pressure exceeds the set value, the sealing block (1042) separates from the step (1027) to form an exhaust gap.

9. The puncture device according to claim 8, characterized in that: The spring force of the pressure spring (105) can be adjusted by rotating the pressure knob (107); When the pressure in the pneumoperitoneum exceeds the spring force, the pressure rod (104) is pushed open, the exhaust passage is opened, and excess gas in the pneumoperitoneum flows out. When the pressure returns to below the set value, the sealing block (1042) at one end of the pressure rod (104) presses against the step (1027) of the pressure regulating valve body, and the exhaust passage is closed.

10. The puncture device according to claim 9, characterized in that: The outer wall of the sleeve channel (110) has a sawtooth structure (1102).

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