Puncture outfit for pressure-stabilizing laparoscope

Abstract

The puncture outfit comprises a cannula assembly (1), a sealing upper cover (2) and a puncture cone (3), the cannula assembly (1) comprises a cannula upper cover (101) and a pressure stabilizing valve body (102), a valve body mounting groove (1011) is formed in the side wall of the cannula upper cover (101), and the pressure stabilizing valve body (102) is mounted in the valve body mounting groove (1011); the side wall of the sleeve upper cover (101) is also provided with an upper cover air inlet passage (1012) and an upper cover exhaust passage (1013); air is supplied to the pneumoperitoneum through the air inlet channel of the sleeve assembly (1), and the pneumoperitoneum pressure is adjusted and controlled through the exhaust channel. According to the scheme, the pressure of the pressure stabilizing structure is adjustable, the set pressure can be adjusted by shifting the pressure shifting button to adapt to protection of pneumoperitoneum with any pressure, and when the pressure in the pneumoperitoneum exceeds the set pressure, the pneumoperitoneum is rapidly discharged through the pressure stabilizing structure.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a pressure-stabilized laparoscope puncture device. Background Art

[0002] A trocar is a minimally invasive surgical instrument used during surgery to penetrate the abdominal wall and establish a passage for surgical instruments to enter and exit the abdominal cavity. The performance of the trocar significantly impacts the success and duration of the surgical procedure. Trocars are widely used in various minimally invasive abdominal surgeries. Intraperitoneal surgery requires the creation of pneumoperitoneum. The trocar's primary purpose is to penetrate the entire abdominal wall, inflate the abdominal cavity with carbon dioxide gas, and establish a stable pneumoperitoneum environment. This creates a passage between the outside world and the abdominal cavity, allowing surgical instruments to enter the abdominal cavity through the trocar cannula, thus providing sufficient visual field and operating space for the surgical procedure.

[0003] In order to establish a good surgical environment, it is necessary to ensure that the pneumoperitoneum is in a constant pressure environment. When performing surgery in the abdominal cavity, the pneumoperitoneum machine is connected to the puncture device, and air is inflated into the abdominal cavity through the puncture device to establish pneumoperitoneum. The safe pneumoperitoneum pressure is generally 8-15 mmHg. During the operation, there may be air leakage in the pneumoperitoneum, resulting in a decrease in pressure. In order to maintain the pneumoperitoneum pressure, the pneumoperitoneum machine needs to be inflated intermittently. Currently, the maintenance of pneumoperitoneum pressure is completely dependent on the regulation of the pneumoperitoneum machine. Due to the delay in the pneumoperitoneum pressure sensing by the pneumoperitoneum machine, it leads to over-inflation, and the pneumoperitoneum pressure exceeds the set safety pressure, causing damage to the human body.

[0004] The primary function of commonly used laparoscopic trocars on the market is to establish instrument access for minimally invasive surgery and they lack pressure stabilization. During surgery, especially in pediatric laparoscopic surgery, strict requirements are placed on intraperitoneal pressure. Excessive pneumoperitoneum pressure can cause significant harm to the body and increase the likelihood of postoperative complications.

[0005] How to solve the technical problem of clinical safety hazards caused by the fluctuation of pneumoperitoneum pressure during trocar surgery in the existing technology is a technical problem that urgently needs to be solved. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to solve the technical problem that the puncture device in the prior art has no voltage stabilizing function.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A puncture device for a pressure-stabilized laparoscope comprises a sleeve assembly (1), a sealing upper cover (2) and a puncture cone (3), wherein the sealing upper cover (2) is screwed onto the upper portion of the sleeve assembly (1); the puncture cone (3) is inserted into the sleeve assembly (1) through the instrument hole of the sealing upper cover (2); and is characterized in that:

[0009] The casing assembly (1) comprises a casing upper cover (101) and a pressure-stabilizing valve body (102).

[0010] The side wall of the sleeve upper cover (101) is provided with a valve body installation groove (1011), and the pressure-stabilizing valve body (102) is installed in the valve body installation groove (1011);

[0011] The side wall of the sleeve upper cover (101) is further provided with an upper cover air intake passage (1012) and an upper cover air exhaust passage (1013); correspondingly, the pressure-stabilizing valve body (102) is provided with a valve body air intake passage (1021) and a valve body air 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 passage, and the upper cover exhaust passage (1013) is connected to the valve body exhaust passage (1022) to form an exhaust passage; air is supplied to the pneumoperitoneum through the air inlet passage of the sleeve assembly (1), and the pneumoperitoneum pressure is regulated and controlled through the exhaust passage.

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

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

[0015] The pressure rod (104), the pressure spring (105), and the 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] A sealing block (1042) is provided at the other end of the pressure rod (104), and the sealing block (1042) is pressed against the step (1027) of the pressure-stabilizing valve body (102);

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

[0019] Furthermore, the pressure regulating mechanism further comprises a pressure dial button (107),

[0020] The pressure dial button (107) is provided with an inclined track (1071);

[0021] A regulating rod (1062) is provided on one side of the pressure regulator (106), and the regulating rod (1062) is pressed against an inclined track (1071) on the pressure dial button (107);

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

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

[0024] The end of the valve core (103) is provided with a limiting groove (1031), and the valve body air inlet passage (1021) is correspondingly provided with a protrusion. 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 further comprises a locking and fixing cover (108) and a blocking 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 arranged between the locking and fixing cover (108) and the sleeve upper cover (101).

[0028] Furthermore, the sleeve assembly further comprises a sleeve channel (110), a buckle (1101) is provided on the sleeve channel (110), and the sleeve channel is screwed onto the lower end of the sleeve upper cover (101) through 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 a set value, the sealing block (1042) separates from the step (1027) to form an exhaust gap.

[0031] Furthermore, the elastic force of the pressure spring (105) is adjusted by rotating the pressure dial button (107);

[0032] When the pneumoperitoneum pressure exceeds the spring force, the pressure rod (104) is pushed open, the exhaust passage is opened, and the 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 stabilizing valve body, and the exhaust passage is closed.

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

[0035] After adopting such a design, the present invention has at least the following advantages:

[0036] (1) The pressure of the pressure stabilizing structure of this scheme is adjustable. The set pressure can be adjusted by turning the pressure dial 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.

[0037] (2) The present invention has a simple structure, good effect, low cost and easy process implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Figure 1 This is a diagram showing the overall structure of a trocar according to an embodiment of the present invention;

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

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

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

[0043] Figure 5 This is a structural diagram of a casing upper cover 101 according to an embodiment of the present invention;

[0044] Figure 6 1 is a schematic structural diagram of a pressure-stabilizing valve body 102 according to an embodiment of the present invention;

[0045] Figure 7 1 is a schematic structural diagram of a valve core 103 according to an embodiment of the present invention;

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

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

[0048] Figure 101 is a schematic structural diagram of a pressure regulator 106 according to an embodiment of the present invention;

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

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

[0051] Figure 13 This is a structural diagram of a choke valve 109 according to an embodiment of the present invention;

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

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

[0054] Figure 16 This is a structural diagram of a sealed upper cover 2 according to an embodiment of the present invention;

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

[0056] Reference numerals: sleeve assembly 1, sealing upper cover 2, puncture cone 3, sleeve upper cover 101, valve body mounting groove 1011, air inlet passage 1012, exhaust passage 1013, pressure-stabilizing valve body 102, air inlet passage 1021, exhaust passage 1022, limiting groove 1023, Luer connector 1024, main exhaust port 1025, pressure-stabilizing exhaust port 1026, step 1027, valve core 103, limiting groove 1031, air inlet 103 2. Valve core dial button 1033, pressure rod 104, rod body 1041, silicone sealing block 1042, pressure spring 105, pressure regulator 106, limiting protrusion 1061, adjusting rod 1062, sleeve 1063, pressure dial button 107, inclined track 1071, dial button head 1072, locking fixing cover 108, air blocking valve 109, sleeve channel 110, buckle 1101, serrated structure 1102, O-ring 111. DETAILED DESCRIPTION

[0057] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0058] In this document, “upper”, “lower”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0059] In the following, 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. The expressions proximal end and distal end are only used to simplify and clarify the description and should not be understood as any limitation to the present invention.

[0060] See attached Figure 1-17 The pressure-stabilized laparoscopic puncture device of one embodiment of the present application includes: a sleeve assembly 1, a sealing upper cover 2, and a puncture cone 3; specifically, the sealing upper cover 2 is screwed onto the sleeve assembly 1, and the puncture cone 3 is inserted into the sleeve assembly 1 through the instrument hole of the sealing upper cover 2.

[0061] The casing assembly 1 includes a casing upper cover 101 and a pressure-stabilizing valve body 102;

[0062] The side wall of the sleeve cover 101 is provided with a valve body mounting groove 1011, an upper cover air inlet passage 1012 and an upper cover air exhaust passage 1013. Correspondingly, the pressure stabilizing valve body 102 is provided with a valve body air inlet passage 1021 and a valve body air exhaust passage 1022.

[0063] Specifically, the pressure-stabilizing valve body 102 is installed in the valve body installation groove 1011 of the sleeve upper cover 101, so that the upper cover air intake passage 1012 of the sleeve upper cover 101 is connected with the valve body air intake passage 1021 of the pressure-stabilizing valve body 102 to form an air intake passage, and the upper cover exhaust passage 1013 of the sleeve upper cover 101 is effectively connected with the valve body exhaust passage 1022 of the pressure-stabilizing valve body 102 to form an exhaust passage.

[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 air exhaust channel.

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

[0066] Here, a valve core limiting groove 1031 is provided at the end of the valve core 103, and 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, so that the valve core air inlet port 1032 of the valve core 103 is connected to the valve body air inlet passage 1021 of the pressure-stabilizing valve body 102, and the valve core air inlet port 1032 just forms a passage with the valve body air inlet passage 1021.

[0067] Here, the valve core 103 further includes a valve core dial button 1033 for dialing the valve core 103 .

[0068] On the other hand, in order to realize the function of regulating the pneumoperitoneum pressure, 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 the valve body exhaust passage 1022 of the pressure-stabilizing valve body 102 in sequence.

[0069] Specifically, the rod body 1041 of the pressure rod 104 is inserted into the sleeve 1063 of the pressure regulator 106 with the pressure spring 105, and a sealing block 1042 is provided at the other end of the pressure rod 104. The sealing block 1042 here is a silicone sealing block. The sealing block 1042 is pressed against the step 1027 of the pressure-stabilizing 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, wherein 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 enable the pressure regulator 106 to move axially in the exhaust passage 1022, and the rotational movement is effectively restricted.

[0071] Here, the pressure-stabilizing valve body 102 further includes a Luer connector 1024 for connecting to an air intake line.

[0072] The pressure-stabilizing valve body 102 further includes a main exhaust port 1025 for exhausting the gas in the pneumoperitoneum after the operation is completed.

[0073] Furthermore, the pressure regulating mechanism also includes a pressure dial button 107, which is used to adjust the unloading critical pressure of the pressure stabilizing structure. The pressure dial button 107 includes a dial button head 1072. The pressure dial button 107 is also provided with an inclined track 1071. The pressure dial button 107 is installed on the exhaust passage 1022. There is an adjusting rod 1062 on one side of the pressure regulator 106, which is pressed against the inclined track 1071 on the pressure dial button 107.

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

[0075] Due to the action of the pressure spring 105, the silicone seal block 1042 at one end of the pressure rod 104 presses against the step 1027 of the pressure-stabilizing valve body 102. When the puncture device is inserted into the pneumoperitoneum to work, when the pneumoperitoneum pressure is greater than the set elastic force of the pressure spring 105, the gas pressure in the pneumoperitoneum pushes the pressure rod 104 open. Since the diameter of the silicone seal block 1042 at one end of the pressure rod 104 is smaller than the diameter of the exhaust passage 1022, the exhaust passage 1022 is opened immediately, and the excess gas passes through the silicone seal block 1042. 42 and the gap between the exhaust passage 1022 flows to the pressure-stabilizing exhaust port 1026 to achieve pressure relief. At this time, the excess gas in the pneumoperitoneum flows out, and the pneumoperitoneum pressure returns to the set pressure value of the pressure-stabilizing structure; when the air pressure in the pneumoperitoneum is not greater than the elastic force of the pressure spring 105, the pressure rod 104 pressure rod 104 is reset under the action of the pressure spring 105, and the silicone sealing block 1042 is again pressed against the step 1027 of the pressure-stabilizing valve body 102, and the exhaust passage 1022 is closed to maintain the pneumoperitoneum pressure stable.

[0076] Here, the pneumoperitoneum pressure setting varies for different people, and the safe pneumoperitoneum pressure is generally between 8 and 15 mmHg. To make the trocar more widely applicable, the present application solution designs the pressure dial 107 with an inclined track 1071. On one side of the pressure regulator 106, an adjustment rod 1062 is mounted on the inclined track 1071. When the pressure dial 107 is rotated clockwise, the adjustment rod 1062 presses against the more convex position of the inclined track 1071, compressing the pressure spring 105 and increasing the spring force, thereby increasing the required pneumoperitoneum pressure to open the pressure rod 104. When the pressure dial 107 is rotated counterclockwise, the adjustment rod 1062 presses against the more concave position of the inclined track 1071, releasing the pressure spring 105 and reducing the spring force, thereby decreasing the required pneumoperitoneum pressure to open the pressure rod 104. By adjusting the pressure dial 107 to set the exhaust force, the trocar is suitable for pneumoperitoneum at any pressure.

[0077] Furthermore, the sleeve assembly 1 further includes a locking and fixing cover 108 and a choke valve 109.

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

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

[0080] There is a buckle 1101 on the sleeve channel 110, and the sleeve channel 110 is screwed to the lower end of the sleeve cover 101 through the buckle 1101. In order to increase the airtightness, the present application solution places an O-ring 111 in the middle to achieve a better gas sealing effect, thereby isolating the assembly interface of the puncture sleeve from the external gas.

[0081] Furthermore, the outer wall of the cannula channel 110 has a serrated structure 1102. When the cannula is inserted into the pneumoperitoneum, the serrated structure 1102 contacts the abdominal wall hole to increase friction and prevent the puncture device from being displaced.

[0082] The working process of a pressure-stabilized laparoscopic trocar according to one embodiment of the present invention is as follows:

[0083] During operation, the pressure-stabilizing laparoscopic puncture device of the present application continuously delivers gas to 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. By adjusting the pressure dial, the pressure relief threshold set by the pressure regulating mechanism is raised above this preset value, thereby achieving the over-pressure relief function. Specifically, when the pressure exceeds 15 mmHg, the pressure is relieved.

[0084] When the actual pressure within the pneumoperitoneum exceeds 15 mmHg, the excess gas will follow a specific path to trigger the pressure regulation mechanism. Specifically, the high-pressure airflow within the pneumoperitoneum first enters through the lower end of the instrument port of the cannula assembly 1, then passes through the upper cover exhaust passage 1013 of the cannula upper cover 101 and enters the pressure regulating mechanism, which 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 seal 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, and the annular gap formed between the two constitutes a gas circulation channel, allowing the excess gas to flow through the gap between the silicone seal 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 discharged, 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 is reset under the action of the spring restoring force, and the silicone sealing block 1042 is again pressed against the step 1027 of the pressure-stabilizing valve body 102, blocking the exhaust passage 1022. The exhaust passage 1022 is closed, thereby stably maintaining the pneumoperitoneum pressure at the preset level of 15 mmHg, ensuring the safety and stability of the surgical operating environment.

[0086] The trocar introduced in the present invention has at least the following advantages:

[0087] (1) The pressure of the pressure stabilizing structure of this scheme is adjustable. The set pressure can be adjusted by turning the pressure dial 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.

[0088] (2) The present invention has a simple structure, good effect, low cost and easy process implementation.

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

[0090] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A puncture device for laparoscopy with a stable pressure, comprising a sleeve assembly (1), a sealing upper cover (2) and a puncture cone (3), wherein the sealing upper cover (2) is screwed onto the upper part of the sleeve assembly (1); the puncture cone (3) is inserted into the sleeve assembly (1) through the instrument hole of the sealing upper cover (2); characterized in that: The casing assembly (1) comprises a casing upper cover (101) and a pressure-stabilizing valve body (102). The side wall of the sleeve upper cover (101) is provided with a valve body installation groove (1011), and the pressure-stabilizing valve body (102) is installed in the valve body installation groove (1011); The side wall of the sleeve upper cover (101) is further provided with an upper cover air intake passage (1012) and an upper cover air exhaust passage (1013); correspondingly, the pressure-stabilizing valve body (102) is provided with a valve body air intake passage (1021) and a valve body air 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 passage, and the upper cover exhaust passage (1013) is connected to the valve body exhaust passage (1022) to form an exhaust passage; air is supplied to the pneumoperitoneum through the air inlet passage of the sleeve assembly (1), and the pneumoperitoneum pressure is regulated and controlled through the exhaust passage.

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

3. The trocar according to claim 2, characterized in that: One end of the pressure rod (104) is connected to the pressure spring (105); A sealing block (1042) is provided at the other end of the pressure rod (104), and the sealing block (1042) is pressed against the step (1027) of the pressure-stabilizing valve body (102); The pressure regulator (106) is provided with a limiting protrusion (1061), and a limiting groove (1023) is correspondingly provided in the exhaust passage (1022) of the valve body. The limiting protrusion (1061) and the limiting groove (1023) cooperate to enable the pressure regulator (106) to move axially in the exhaust passage.

4. The trocar according to claim 3, characterized in that: The pressure regulating mechanism further comprises a pressure dial button (107), The pressure dial button (107) is provided with an inclined track (1071); A regulating rod (1062) is provided on one side of the pressure regulator (106), and the regulating rod (1062) is pressed against an inclined track (1071) on the pressure dial button (107); The compression amount of the pressure spring (105) is changed by adjusting the pressure dial button (107) to adjust the exhaust pressure threshold required by the pressure rod (104).

5. The trocar according to claim 4, characterized in that: A valve core (103) is provided in the valve body air inlet passage (1021); The end of the valve core (103) is provided with a limiting groove (1031), and the valve body air inlet passage (1021) is correspondingly provided with a protrusion. 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.

6. The trocar according to claim 5, characterized in that: The sleeve assembly further comprises a locking and fixing cover (108) and a choke 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 arranged between the locking and fixing cover (108) and the sleeve upper cover (101).

7. The trocar according to claim 6, characterized in that: The sleeve assembly further comprises a sleeve channel (110), a buckle (1101) is provided on the sleeve channel (110), and the sleeve channel is screwed onto the lower end of the sleeve upper cover (101) through the buckle (1101).

8. The trocar 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 a set value, the sealing block (1042) separates from the step (1027) to form an exhaust gap.

9. The trocar according to claim 8, characterized in that: The elastic force of the pressure spring (105) is adjusted by rotating the pressure dial button (107); When the pneumoperitoneum pressure exceeds the spring force, the pressure rod (104) is pushed open, the exhaust passage is opened, and the 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 stabilizing valve body, and the exhaust passage is closed.

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

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