A double-lumen laparoscopic trocar

Abstract

This utility model discloses a double-lumen laparoscopic trocar, comprising a trocar cannula (1), a sealing cap (2), and a trocar cone (3). The sealing cap (2) is screwed onto the upper end of the trocar cannula (1), and the trocar cone (3) is inserted into the trocar cannula (1) through the instrument hole of the sealing cap (2). The trocar is characterized by further comprising: an adapter, the adapter including at least one gas interface type for adapting to the gas interfaces of different devices; the trocar cannula (1) contains two independent gas channels. The double-lumen laparoscopic trocar of this design allows for simultaneous control of air intake and exhaust through a single trocar, reducing the need for a separate trocar, minimizing trauma to the patient, and increasing the success rate of the surgery.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a trocar for double-lumen laparoscopy. Background Technology

[0002] Because laparoscopic trocars have a compact structure, most commercially available trocars are single-lumen, meaning that air intake and smoke exhaust share a single channel and cannot be performed simultaneously. While single-lumen laparoscopic trocars offer simpler techniques, the rapid development of abdominal surgery in recent years has rendered single-lumen laparoscopic trocars inadequate for the diverse needs of abdominal procedures.

[0003] Existing single-lumen laparoscopic trocars mainly consist of a trocar cannula, a sealing cap, and a trocar cone. During surgery, when smoke appears inside the pneumoperitoneum, the surgeon's field of vision is obstructed, requiring smoke removal. Simultaneously, maintaining the stability of the pneumoperitoneum necessitates continuous inflation. Therefore, at least two trocars are needed per surgery to ensure stable pneumoperitoneum pressure for smoke removal. Current laparoscopic trocars share a single gas inlet and outlet channel, generally exhibiting problems such as a single gas pathway and poor adapter compatibility, leading to limitations in use and reduced clinical efficiency.

[0004] How to solve the technical problem that the air intake and smoke exhaust of the puncture device share a single channel in the existing technology is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the issue that the existing puncture device uses a single channel for both air intake and smoke exhaust, which makes it impractical.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0007] A double-lumen laparoscopic trocar includes a trocar cannula (1), a sealing cap (2), and a trocar (3). The sealing cap (2) is screwed onto the upper end of the trocar cannula (1), and the trocar (3) is inserted into the trocar cannula (1) through the instrument port of the sealing cap (2). The trocar is characterized by further comprising:

[0008] An adapter, the adapter including at least one gas interface type for adapting to the gas interfaces of different devices;

[0009] The puncture cannula (1) contains two independent gas channels.

[0010] Furthermore, the puncture cannula (1) includes an outer cannula (101) and an inner cannula (102). The inner cannula (102) is sleeved inside the outer cannula (101), and a first gas channel is formed through the interlayer between the outer cannula (101) and the inner cannula (102). A second gas channel is formed through the instrument hole of the sealing cap (2) and the inner cannula (102).

[0011] Furthermore, the outer sleeve (101) and the inner sleeve (102) are sealed together by a first O-ring (103).

[0012] Furthermore, the lower outer wall of the inner sleeve (102) is uniformly provided with a flow guide groove (1022) in the circumferential direction, and correspondingly, the inner wall of the outer sleeve (101) is uniformly provided with a fluid groove (1016) in the circumferential direction, and the width of the fluid groove (1016) is equal to the width of the flow guide groove (1022).

[0013] Furthermore, the guide groove (1022) is V-shaped, and correspondingly, air inlet nozzles (1015) are evenly distributed on the lower outer wall of the outer sleeve (101), with the V-shaped opening of the guide groove (1022) aligned with the air inlet nozzle (1015) at the lower end of the outer sleeve (101).

[0014] Furthermore, it also includes a sleeve seat (104),

[0015] The outer sleeve (101) and the sleeve seat (104) are connected by multiple self-locking buckles (1041) and locking buckles (1012).

[0016] Furthermore, it also includes a dual-lumen manifold connector (106) and a passage connector (107); the dual-lumen manifold connector (106) is connected to the sleeve seat (104) through the passage connector (107); the dual-lumen manifold connector (106) includes a first gas passage (1061) and a second gas passage (1062), the first gas passage (1061) connects the interlayer between the outer sleeve (101) and the inner sleeve (102), and the second gas passage (1062) connects to the instrument hole (1025) in the middle of the inner sleeve (102).

[0017] Furthermore, it also includes a guide cover (109) and a gas shut-off valve (110), wherein the guide cover (109) and the gas shut-off valve (110) are sealed by ultrasonic welding.

[0018] Furthermore, the access connector (107) is sealed to the access interface (1013) of the outer tube (101) and the gas passage of the dual-cavity manifold connector (106) respectively through the second O-ring (108).

[0019] Furthermore, the outer wall of the outer sleeve (101) is provided with an anti-slip serrated structure.

[0020] With this design, the present invention has at least the following advantages:

[0021] (1) In surgical procedures, the use of the double-lumen laparoscopic trocar of this scheme allows for simultaneous control of air intake and smoke exhaust through a single trocar, reducing the need for a trocar, thus minimizing trauma to the human body and increasing the success rate of the surgery.

[0022] (2) This utility model has a simple structure, good effect, low cost and easy process implementation. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is an overall structural diagram of the puncture device according to an embodiment of the present invention;

[0025] Figure 2 This is a cross-sectional schematic diagram of the puncture cannula 1 according to an embodiment of the present invention;

[0026] Figure 3 This is a partial cross-sectional view of the upper structure of the puncture cannula 1 according to an embodiment of this utility model;

[0027] Figure 4 This is a partial cross-sectional view of the lower end structure of the puncture cannula 1 according to an embodiment of this utility model;

[0028] Figure 5 This is an overall structural diagram of the puncture cannula 1 according to an embodiment of the present invention;

[0029] Figure 6 This is an exploded view of the lower end of the puncture cannula 1 according to an embodiment of the present invention;

[0030] Figure 7 This is an exploded view of the upper end of the puncture cannula 1 according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the outer sleeve 101 according to an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the inner sleeve 102 structure according to an embodiment of the present invention;

[0033] Figure 10-A This is a three-dimensional structural diagram of the sleeve seat 104 according to an embodiment of the present invention;

[0034] Figure 10-BThis is a side view of the sleeve seat 104 according to an embodiment of the present invention;

[0035] Figure 11-A This is a three-dimensional structural diagram of the sleeve sealing ring 105 according to an embodiment of this utility model;

[0036] Figure 11-B This is a side view of the sleeve sealing ring 105 according to an embodiment of the present invention;

[0037] Figure 12-A This is a three-dimensional structural schematic diagram of a dual-cavity manifold connector 106 according to an embodiment of this utility model;

[0038] Figure 12-B This is a cross-sectional schematic diagram of the structure of the dual-lumen manifold connector 106 according to an embodiment of this utility model;

[0039] Figure 13 This is a schematic diagram of the structure of the channel connector 107 according to an embodiment of the present invention;

[0040] Figure 14-A This is a schematic diagram of the near-end face structure of the guide cover 109 according to an embodiment of the present invention;

[0041] Figure 14-B This is a schematic diagram of the distal end face structure of the guide cover 109 according to an embodiment of the present invention;

[0042] Figure 15 This is a schematic diagram of the structure of the air-blocking valve 110 according to an embodiment of the present invention;

[0043] Figure 16 This is a schematic diagram and a cross-sectional view of the sealing cover 2 according to an embodiment of the present invention;

[0044] Figure 17 This is a schematic diagram of the puncture cone 3 structure according to an embodiment of the present invention;

[0045] Figure 18 This is a schematic diagram of the structure of the first adapter 4 according to an embodiment of the present invention;

[0046] Figure 19 This is a schematic diagram of the structure of the first adapter front seat 401 according to an embodiment of this utility model;

[0047] Figure 20 This is a schematic diagram of the adapter rear seat 402 according to an embodiment of the present invention;

[0048] Figure 21 This is a schematic diagram of the structure of the second adapter 5 according to an embodiment of the present invention;

[0049] Figure 22 This is a schematic diagram of the structure of the second adapter front seat 501 according to an embodiment of this utility model;

[0050] Figure 23 This is a schematic diagram of the front 6 structures of the third adapter in one embodiment of this utility model;

[0051] Figure 24 This is a schematic diagram of the structure of the front seat 601 of the third adapter in one embodiment of this utility model;

[0052] Reference numerals in the attached diagram: 1. Puncture cannula; 2. Sealing cap; 3. Puncture cone; 4. First adapter; 5. Second adapter; 6. Third adapter; 101. Outer sleeve; 1011. Positioning groove; 1012. Locking buckle; 1013. Passage interface; 1014. Serrated edge; 1015. Air inlet nozzle; 1016. Fluid groove; 1017. Inner platform; 102. Inner sleeve; 102. Lower end face; 1021. Guide groove; 1022. Guide vane; 1023. Annular groove; 1024. Instrument hole; 1025. First O-ring; 103. Cannula seat; 104. Self-locking. 1041, snap fastener, 1042, 1043, 1044, 1045, 1046, 105, 105, 1051, 106, 106, 1061, 1062, 1063, 1064, 1065, 1066, 107, 1071, 108, 109, 100, 100, 100, 101, 1062, 1063, 1064, 1065, 1066, 107, 108, 109, 100, 100, 100, 101, 1042, 1043, 1044, 1045, 1046, 1047, 1048, 1049, 1040, 104 ... Second sealing end face 1072, second O-ring 108, guide cover 109, second limiting groove 1091, first guide groove 1092, second guide groove 1093, guide cover sealing port 1094, air stop valve 110, second annular groove 1101, puncture cone cover 301, tip 302, first adapter front seat 401, first gas passage 4011, second gas passage 4012, Luer connector 4013, first anti-slip texture 4014, first gas passage extension groove 4015, second gas passage extension groove 4 016, Welding rib 4017, Adapter rear seat 402, First gas passage 4021, Second gas passage 4022, Positioning post 4023, Thread 4024, Second adapter front seat 501, First gas passage 5011, Second gas passage 5012, Tapered tube interface 5013, Second anti-slip texture 5014, Third adapter front seat 601, First gas passage 6011, Second gas passage 6012, Luer connector 6013 and tapered tube interface 6014, Third anti-slip texture 6015. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] See appendix Figure 1-24 The double-lumen laparoscopic trocar of this application includes: a trocar cannula 1, a sealing cap 2, and a trocar cone 3; specifically, the sealing cap 2 is screwed onto the upper end of the trocar cannula 1, and the trocar cone 3 is detachably inserted into the trocar cannula 1 through the instrument hole of the sealing cap 2.

[0057] The puncture device also includes an adapter, which is optional. Schematic, it can be any one of the first adapter 4, the second adapter 5, or the third adapter 6. The three adapters 4, 5, and 6 can be screwed onto the connector mounting points on the side wall of the puncture cannula 1. The first, second, and third adapters are of different types. Figure 1 The adapter used is schematically the first adapter 4.

[0058] The puncture cannula (1) in this embodiment contains two independent gas channels.

[0059] Specifically, the puncture cannula 1 includes: an outer cannula 101 and an inner cannula 102; wherein, the inner cannula 102 is sleeved inside the outer cannula 101; a first gas channel is formed through the interlayer between the outer cannula (101) and the inner cannula (102); a second gas channel is formed through the instrument hole of the sealed cap (2) and the inner cannula (102).

[0060] To make the connection more secure, a first O-ring 103 can be provided between the outer sleeve 101 and the inner sleeve 102 as needed, so that the inner sleeve 102 and the outer sleeve 101 can be sealed by the first O-ring 103.

[0061] Specifically, the upper outer wall of the inner sleeve 102 is provided with an annular groove 1024, the first O-ring 103 is sleeved on the annular groove 1024 of the inner sleeve 102, and then the inner sleeve 102 with the first O-ring 103 installed is inserted into the outer sleeve 101.

[0062] Here, the lower outer wall of the inner sleeve 102 has four circumferentially distributed guide grooves 1022, and the inner wall of the outer sleeve 101 has four fluid grooves 1016 evenly distributed. These fluid grooves 1016 are vertically continuous, extending from the upper end to the lower end of the outer sleeve 101. It should be noted that the width of each fluid groove 1016 is equal to the width of the guide grooves 1022, and the two correspond to each other. When the inner sleeve 102 is inserted into the outer sleeve 101... The guide groove 1022 is inserted along the fluid groove 1016, thereby ensuring that the inner sleeve 102 can be smoothly inserted into the outer sleeve 101. Furthermore, the guide groove 1022 here is a downward convex type and has a V-shaped design. Correspondingly, there are four air inlet nozzles 1015 evenly distributed on the lower outer wall of the outer sleeve 101. The downward convexity of each guide groove 1022 is aligned with the four air inlet nozzles 1015 on the outer sleeve 101 to facilitate the flow of gas.

[0063] To make the inner sleeve 102 fit more securely onto the outer sleeve 101, an annular inner platform 1017 is provided on the inner side of the bottom end of the outer sleeve 101. When the inner sleeve 102 is inserted into the outer sleeve 101, the lower end face 1021 of the inner sleeve 102 contacts the annular inner platform 1017 of the outer sleeve 101. At this time, the outer sleeve 101 and the inner sleeve 102 cooperate to make the four evenly distributed fluid grooves 1016 of the outer sleeve 101 lead to the four evenly distributed guide grooves 1022 of the inner sleeve 102 respectively. That is, the protrusion of the guide groove 1022 is inserted into the outer sleeve 101 along the groove of the fluid groove 1016. The V-shaped groove of the guide groove 1022 corresponds exactly to the air inlet nozzle 1015. Since the sealing of the guide groove 1022 divides the interlayer of the inner sleeve and the outer sleeve into four channels, the flow is directed to the four air inlet nozzles 1015, thus forming a double sleeve clamping structure.

[0064] The puncture cannula 1 in this embodiment further includes: cannula seat 104;

[0065] The outer sleeve 101 has a positioning groove 1011 on its upper outer wall, and the corresponding sleeve seat 104 has a first positioning protrusion 1042 on its inner wall. The outer sleeve 101 with the inner sleeve 102 assembled is inserted into the sleeve seat 104 through the positioning groove 1011 of the outer sleeve 101 and the first positioning protrusion 1042 of the sleeve seat 104.

[0066] Furthermore, in order to make the connection between the outer sleeve 101 and the sleeve seat 104 more secure, four self-locking buckles 1041 are evenly distributed in the inner wall of the sleeve seat 104 in this embodiment of the application. Correspondingly, four locking buckles 1012 are evenly distributed in the outer wall of the outer sleeve 101. When the outer sleeve 101 is inserted into the sleeve seat 104, the four self-locking buckles 1041 evenly distributed in the sleeve seat 104 are fastened in the four locking buckles 1012 evenly distributed in the outer sleeve 101, forming a self-locking mechanism.

[0067] Furthermore, an access interface 1013 is provided on the upper outer wall of the outer sleeve 101, and a connecting groove 1044 is provided on the outer wall of the sleeve seat 104. The access interface 1013 and the first gas access interface 1045 are concentric circles.

[0068] Furthermore, in order to increase the friction between the trocar and the abdominal wall during pneumoperitoneum insertion and help stabilize the trocar, the present invention provides serrations 1014 on the outer wall of the outer sleeve 101.

[0069] The puncture cannula 1 in one embodiment of this application may further include a cannula sealing ring 105. The cannula sealing ring 105 can be fitted onto the upper outer wall of the outer cannula 101 as needed. When the outer cannula 101 is fitted onto the cannula seat 104, the cannula sealing ring 105 between the outer cannula 101 and the cannula seat 104 is squeezed and deformed to achieve a sealing effect.

[0070] Here, the sleeve sealing ring 105 is stepped, with a sealing step 1051. The stepped 105 is made of soft silicone material, which plays a good sealing role.

[0071] Furthermore, the puncture cannula 1 in this embodiment of the application also includes: a dual-lumen manifold connector 106 and a passage connector 107; the dual-lumen manifold connector 106 is connected to the cannula seat 104 through the passage connector 107.

[0072] Specifically, the two end faces of the access connector 107 are a first sealing end face 1071 and a second sealing end face 1072. The first sealing end face 1071 of the access connector 107 is fitted into the groove of the access interface 1013 of the outer sleeve 101, and the second sealing end face 1072 of the access connector 107 is inserted into the groove outside the first gas passage 1061 of the dual-cavity manifold connector 106. Here, the dual-cavity manifold connector 106 is provided with a sealing rib 1064. The sealing rib 1064 of the dual-cavity manifold connector 106 is aligned with the connecting groove 1044 of the sleeve seat 104. Thus, the first gas passage 1061 of the dual-cavity manifold connector 106 connects the interlayer formed by the outer sleeve 101 and the inner sleeve 102.

[0073] Here, the dual-chamber manifold connector 106 is also provided with a first gas passage sealing groove 1063 for installing a sealing ring, which plays a good sealing role.

[0074] Furthermore, the upper outer wall of the inner sleeve 102 is uniformly provided with multiple guide vanes 1023 for stabilizing and guiding the gas flow.

[0075] Here, after the gas passes through the first gas passage 1061 of the dual-chamber manifold connector 106, it passes through the guide vane 1023 of the inner sleeve 102 and the fluid groove 1016 of the outer sleeve 101, that is, the interlayer channel between the outer sleeve 101 and the inner sleeve 102. The airflow flows downward to the air inlet nozzle 1015, forming a complete first gas passage, that is, the air inlet passage.

[0076] Of course, in order to make the seal between the dual-lumen manifold connector 106 and the passage connector 107 more secure, preferably, in one embodiment of the present invention, a second O-ring 108 is installed between the first sealing end face 1071 and the groove of the passage interface 1013, and a second O-ring 108 is also installed between the second sealing end face 1072 and the groove of the first gas passage 1061. That is, one end of the passage connector 107 is connected to the outer sleeve 101 through a second O-ring 108, and the other end of the passage connector 107 is connected to the dual-lumen manifold connector 106 through a second O-ring 108. A second O-ring 108 is provided on both connection surfaces, which will not be described in detail here.

[0077] Here, the second gas passage 1062 of the dual-lumen manifold connector 106 is connected to the second gas passage interface 1046 of the sleeve seat 104, leading to the instrument hole 1025 in the inner sleeve 102 and the sleeve seat 104, forming the second gas passage, i.e. the smoke exhaust passage.

[0078] Specifically, during smoke extraction, the smoke inside the pneumoperitoneum flows through the instrument port 1025 to the second gas passage 1062 of the dual-lumen manifold connector 106. Due to the reduced pressure inside the pneumoperitoneum, the pneumoperitoneum machine is inflated through the first gas passage 1061 of the dual-lumen manifold connector 106, and the air is guided by the guide vanes 1023 of the inner sleeve 102, entering the fluid groove 1016 of the outer sleeve 101 and flowing to the air inlet nozzle 1015 towards the pneumoperitoneum.

[0079] The first gas pathway and the second gas pathway are independent gas pathways.

[0080] The puncture cannula 1 in this embodiment further includes: a guide cap 109 and an air-blocking valve 110.

[0081] The guide cover 109 is engaged with the second positioning protrusion 1043 of the sleeve seat 104 through the second limiting groove 1091, and is fixed and sealed by ultrasonic welding. The air valve 110 is sleeved on the guide cover sealing port of the guide cover 109 through the second annular groove 1101, forming a complete puncture sleeve 1.

[0082] Here, the guide cover 109 also includes a guide cover sealing port 1094. The diameter of the guide cover sealing port 1094 is smaller than the diameter of the second annular groove 1101 of the air-blocking valve 110, which can be well interference-fitted and play a sealing role.

[0083] Furthermore, the airtight cover 2 is screwed onto the puncture cannula 1 via the first guide groove 1092 and the second guide groove 1093 of the guide cover 109. The puncture cone 3 includes a puncture cone cover 301. During operation, the puncture cone 3 is inserted into the airtight cover 2 and the puncture cannula 1 through the instrument hole 1025, exposing the cone-shaped tip 302.

[0084] The first adapter 4, the second adapter 5, and the third adapter 6 can be screwed onto the dual-chamber manifold connector 106 respectively. Different combinations of different connectors and interfaces can be used to adapt to a wider range of different models of equipment.

[0085] Specifically, the first adapter 4 consists of a front adapter seat 401 and a rear adapter seat 402. The front adapter seat 401 includes a first gas passage 4011 and a second gas passage 4012. Both the first gas passage 4011 and the second gas passage 4012 are connected using a Luer connector 4013. The front adapter seat 401 and the rear adapter seat 402 are sealed and fixed by ultrasonic welding. Furthermore, for anti-slip purposes, this application provides multiple first anti-slip grooves 4014 on the circumferential surface of the first adapter 4. The front adapter seat 401 also has ultrasonic welding ribs 4017 for separating the first gas passage 4011 and the second gas passage 4012.

[0086] Correspondingly, the adapter seat 402 is composed of a first gas passage 4021 and a second gas passage 4022. The first gas passage 4011 and the second gas passage 4012 are connected to the first gas passage 4021 and the second gas passage 4022 of the adapter seat 402 by ultrasonic welding.

[0087] In order to ensure that the first gas passage 4011 of the first adapter front seat 401 and the first gas passage 4021 of the adapter rear seat 402 do not intersect during installation, a first gas passage extension groove 4015 is provided so that the first gas passage 4011 and the second gas passage 4012 form a passage; similarly, the second gas passage extension groove 4016 has the same function.

[0088] Here, the first gas passage 4021 and the second gas passage 4022 are two independent gas passages, one is the intake passage and the other is the exhaust passage.

[0089] The adapter rear seat 402 is also provided with a positioning post 4023 for positioning the first adapter front seat 401 and the adapter rear seat 402;

[0090] The adapter seat 402 is provided with a thread 4024 for tightening the manifold interface 1065 and the tightening post 1066 of the dual-chamber manifold connector 106.

[0091] On the other hand, the second adapter 5 is composed of a second adapter front seat 501 and an adapter rear seat 402. The second adapter 5 includes a first gas passage 5011 and a second gas passage 5012. The connection method of the first gas passage 5011 and the second gas passage 5012 is a tapered tube interface 5013. Furthermore, in order to prevent slippage, this application provides a plurality of second anti-slip textures 5014 on the side circumferential surface of the second adapter front seat 501. The rear end structure of the second adapter front seat 501 adopts the same structure as the first adapter front seat 401. The second adapter front seat 501 and the adapter rear seat 402 are sealed and fixed by ultrasonic welding, and the connection method is the same as that of the first adapter 4 described above, so that the first gas passage 5011 and the second gas passage 5012 form passages with the first gas passage 4021 and the second gas passage 4022 of the adapter rear seat 402, respectively.

[0092] Furthermore, the third adapter consists of a front adapter seat 601 and a rear adapter seat 402. The third adapter 6 includes a first gas passage 6011 and a second gas passage 6012. The first gas passage 6011 and the second gas passage 6012 are connected via a Luer connector 6013 and a tapered tube interface 6014, respectively. To prevent slippage, this application provides multiple third anti-slip grooves 6015 on the circumferential surface of the front adapter seat 601. The rear end structure of the front adapter seat 601 is the same as that of the front adapter seat 401. The front adapter seat 601 and the rear adapter seat 402 are sealed and fixed by ultrasonic welding, with the connection method being the same as that of the first adapter 4 described above, so that the first gas passage 6011 and the second gas passage 6012 form passages with the first gas passage 4021 and the second gas passage 4022 of the rear adapter seat 402, respectively.

[0093] The working process of a double-lumen laparoscopic trocar according to an embodiment of this utility model is as follows:

[0094] All three adapters here have air intake and smoke exhaust channels. For ease of description, in this embodiment, the first channel is defined as the air intake channel and the second channel as the smoke exhaust channel. All three adapters can be screwed onto the manifold connector on the puncture cannula.

[0095] The working process of the air intake channel is as follows:

[0096] After passing through the first gas passage 1061 of the dual-chamber manifold connector 106, the gas passes through the first gas passage interface 1045 and the passage interface 1013, and enters the interlayer between the outer sleeve 101 and the inner sleeve 102. The gas flow is directed downwards to the air inlet nozzle 1015 and is ejected from the air inlet nozzle 1015. Here, the interlayer between the outer sleeve 101 and the inner sleeve 102 is a channel formed by the fluid groove 1016 and the guide groove 1022.

[0097] The working process of the smoke exhaust duct is as follows:

[0098] The instrument port of the puncture cannula is connected to the pneumoperitoneum. The pneumoperitoneum gas passes through the instrument port 1025, then through the second gas passage interface 1046 of the cannula seat 104, and reaches the second gas passage 1062 of the manifold connector. The second gas passage 1062 is connected to the smoke exhaust passage of the three adapters for smoke exhaust.

[0099] The puncture device described in this utility model has at least the following advantages:

[0100] (1) In surgical procedures, the use of the double-lumen laparoscopic trocar of this scheme allows for simultaneous control of air intake and smoke exhaust through a single trocar, reducing the need for a trocar. Furthermore, since the outer diameter of the cannula of the trocar of this scheme is close to that of a regular single-lumen trocar, it can reduce trauma to the human body and increase the success rate of the surgery.

[0101] (2) This utility model has a simple structure, good effect, low cost and easy process implementation.

[0102] 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.

[0103] 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 double-lumen laparoscopic trocar, comprising a trocar cannula (1), a sealing cap (2), and a trocar (3), wherein the sealing cap (2) is screwed onto the upper end of the trocar cannula (1), and the trocar (3) is inserted into the trocar cannula (1) through an instrument hole in the sealing cap (2), characterized in that, Also includes: An adapter, the adapter including at least one gas interface type for adapting to the gas interfaces of different devices; The puncture cannula (1) contains two independent gas channels.

2. The puncture device according to claim 1, characterized in that: The puncture cannula (1) includes an outer cannula (101) and an inner cannula (102). The inner cannula (102) is fitted inside the outer cannula (101), and a first gas channel is formed through the interlayer between the outer cannula (101) and the inner cannula (102). A second gas channel is formed through the instrument hole of the sealing cap (2) and the inner cannula (102).

3. The puncture device according to claim 2, characterized in that: The outer sleeve (101) and the inner sleeve (102) are sealed together by a first O-ring (103).

4. The puncture device according to claim 3, characterized in that: The lower outer wall of the inner sleeve (102) is uniformly provided with a flow guide groove (1022) in the circumferential direction. Correspondingly, the inner wall of the outer sleeve (101) is uniformly provided with a fluid groove (1016) in the circumferential direction. The width of the fluid groove (1016) is equal to the width of the flow guide groove (1022).

5. The puncture device according to claim 4, characterized in that: The guide groove (1022) is V-shaped. Correspondingly, air inlet nozzles (1015) are evenly distributed on the lower outer wall of the outer sleeve (101). The V-shaped opening of the guide groove (1022) is aligned with the air inlet nozzle (1015) at the lower end of the outer sleeve (101).

6. The puncture device according to claim 5, characterized in that: It also includes a sleeve seat (104), wherein the outer sleeve (101) and the sleeve seat (104) are connected by a plurality of self-locking buckles (1041) and locking buckles (1012).

7. The puncture device according to claim 6, characterized in that: It also includes a dual-lumen manifold connector (106) and a passage connector (107); the dual-lumen manifold connector (106) is connected to the sleeve seat (104) through the passage connector (107); the dual-lumen manifold connector (106) includes a first gas passage (1061) and a second gas passage (1062), the first gas passage (1061) connects the interlayer between the outer sleeve (101) and the inner sleeve (102), and the second gas passage (1062) connects to the instrument hole (1025) in the middle of the inner sleeve (102).

8. The puncture device according to claim 7, characterized in that: It also includes a guide cover (109) and a gas shut-off valve (110), wherein the guide cover (109) and the gas shut-off valve (110) are sealed by ultrasonic welding.

9. The puncture device according to claim 8, characterized in that: The access connector (107) is sealed to the access interface (1013) of the outer tube (101) and the gas passage of the dual-cavity manifold connector (106) via the second O-ring (108).

10. The puncture device according to claim 9, characterized in that: The outer wall of the outer sleeve (101) is provided with an anti-slip serrated structure.

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