Puncture outfit for double-cavity laparoscope

Abstract

The puncture outfit comprises a puncture cannula (1), a sealing upper cover (2) and a puncture cone (3), the sealing upper cover (2) is screwed at the upper end of the puncture cannula (1), the puncture cone (3) penetrates through an instrument hole of the sealing upper cover (2) to be inserted into the puncture cannula (1), and the puncture outfit is characterized by further comprising an adapter, a first connecting piece and a second connecting piece, the adapter comprises at least one gas interface type and is used for adapting to gas interfaces of different equipment; the puncture cannula (1) comprises two independent gas channels. According to the puncture outfit for the laparoscope with the double-cavity structure, air inlet and smoke exhaust can be controlled at the same time through one puncture outfit, one puncture outfit is omitted in an operation, wounds to a human body can be reduced, and the success rate of the operation is increased.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and in particular to a puncture device for a double-lumen laparoscope. Background Art

[0002] Due to their compact structure, laparoscopic trocars currently on the market are single-lumen, meaning both air intake and smoke exhaust share a single channel and cannot operate simultaneously. Single-lumen laparoscopic trocars are technically simpler, and with the rapid development of abdominal surgery in recent years, single-lumen laparoscopic trocars are no longer sufficient to fully cover the diverse range of abdominal surgical procedures.

[0003] Existing single-lumen laparoscopic trocars primarily consist of a puncture cannula, a sealing cap, and a puncture cone. When smoke appears within the pneumoperitoneum during surgery, the doctor's field of vision is obstructed, requiring smoke evacuation. This evacuation must also maintain the stability of the pneumoperitoneum, requiring real-time inflation. Therefore, a single surgery requires at least two trocars to ensure stable pneumoperitoneum pressure for smoke evacuation. Existing laparoscopic trocars share a single channel for both air intake and exhaust, and commonly suffer from issues like a single gas pathway and poor adaptability of adapters. This limits their use and reduces clinical efficiency.

[0004] How to solve the technical problem in the prior art that the air intake and smoke exhaust of the trocar share the same channel is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to solve the technical problem that the air intake and smoke exhaust of the trocar in the prior art share the same channel, which is not practical.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A double-lumen laparoscopic puncture device comprises a puncture sleeve (1), a sealing upper cover (2), and a puncture cone (3), wherein the sealing upper cover (2) is screwed onto the upper end of the puncture sleeve (1), and the puncture cone (3) is inserted into the puncture sleeve (1) through the instrument hole of the sealing upper cover (2), and is characterized in that it also comprises:

[0008] An adapter, comprising at least one type of gas interface, adapted to accommodate gas interfaces of different devices;

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

[0010] Furthermore, the puncture cannula (1) comprises an outer cannula (101) and an inner cannula (102), wherein 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); and a second gas channel is formed through the instrument hole of the sealing upper cover (2) and the inner cannula (102).

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

[0012] Furthermore, the outer wall of the lower end of the inner sleeve (102) is uniformly provided with a 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 guide groove (1022).

[0013] Furthermore, the guide groove (1022) is V-shaped, and correspondingly, air inlet nozzles (1015) are evenly distributed on the outer wall of the lower end of the outer sleeve (101), and the V-mouth of the guide groove (1022) is aligned with the air inlet nozzles (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 a plurality of self-locking buckles (1041) and locking undercuts (1012).

[0016] Furthermore, it also includes a double-lumen manifold connector (106) and a passage connector (107); the double-lumen manifold connector (106) is connected to the sleeve seat (104) through the passage connector (107); the double-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 the instrument hole (1025) in the middle of the inner sleeve (102).

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

[0018] Furthermore, the passage connector (107) is sealedly connected to the passage interface (1013) of the outer sleeve (101) and the gas passage of the double-chamber manifold connector (106) through a second O-ring (108).

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

[0020] After adopting such a design, the present invention has at least the following advantages:

[0021] (1) In surgical operations, the laparoscopic trocar with a double-lumen structure of the present invention can simultaneously control air intake and smoke exhaust through one trocar, thereby reducing the use of one trocar in the operation, reducing trauma to the human body, and increasing the success rate of the operation.

[0022] (2) The present invention has a simple structure, good effect, low cost and easy process implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 This is a diagram showing the overall structure of a trocar according to an embodiment of the present invention;

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

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

[0027] Figure 4 This is a partial sectional view of the lower end structure of the puncture cannula 1 according to an embodiment of the present invention;

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

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

[0030] Figure 7 This is a schematic diagram of the upper end of the puncture cannula 1 according to one embodiment of the present invention;

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

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

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

[0034] Figure 10-B This is a schematic diagram of the side structure of a sleeve seat 104 according to an embodiment of the present invention;

[0035] Figure 11-A This is a schematic diagram of the three-dimensional structure of a casing sealing ring 105 according to an embodiment of the present invention;

[0036] Figure 11-B This is a schematic diagram of the side structure of a casing sealing ring 105 according to an embodiment of the present invention;

[0037] Figure 12-A This is a schematic diagram of the three-dimensional structure of a dual-cavity manifold connector 106 according to an embodiment of the present invention;

[0038] Figure 12-B 1 is a schematic cross-sectional view of a dual-chamber manifold connector 106 according to an embodiment of the present invention;

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

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

[0042] Figure 15 This is a structural diagram of a choke valve 110 according to an embodiment of the present invention;

[0043] Figure 16 This is a structural diagram and an anatomical diagram of a sealing upper cover 2 according to an embodiment of the present invention;

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

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

[0046] Figure 19 This is a schematic structural diagram of the first adapter front seat 401 according to an embodiment of the present invention;

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

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

[0049] Figure 22 This is a structural diagram of the second adapter front seat 501 according to an embodiment of the present invention;

[0050] Figure 23 This is a schematic diagram of the front 6 structures of the third adapter according to an embodiment of the present invention;

[0051] Figure 24 This is a schematic structural diagram of the third adapter front seat 601 according to an embodiment of the present invention;

[0052] Reference numerals: puncture sleeve 1, sealing cover 2, puncture cone 3, first adapter 4, second adapter 5, third adapter 6, outer sleeve 101, positioning groove 1011, locking undercut 1012, passage interface 1013, serration 1014, air inlet nozzle 1015, fluid groove 1016, inner platform 1017, inner sleeve 102, lower end surface 1021, guide groove 1022, guide vane 1023, annular groove 1024, instrument hole 1025, first O-ring 103, sleeve seat 104, self-locking Buckle 1041, first positioning protrusion 1042, second positioning protrusion 1043, connecting groove 1044, first gas passage interface 1045, second gas passage interface 1046, sleeve sealing ring 105, sealing step 1051, dual-chamber manifold joint 106, first gas passage 1061, second gas passage 1062, first gas passage sealing groove 1063, sealing rib 1064, manifold interface 1065, tightening column 1066, passage connector 107, first sealing end face 1071, second gas passage Second sealing end surface 1072, second O-ring 108, guide cover 109, second limiting groove 1091, first guide groove 1092, second guide groove 1093, guide cover sealing opening 1094, air blocking 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 groove 4014, first gas passage extension groove 4015, second gas passage extension groove 4016. 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 groove 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 groove 6015. DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] 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.

[0056] See attached Figure 1-24 The double-lumen laparoscopic puncture device of one embodiment of the present application includes: a puncture sleeve 1, a sealing upper cover 2, and a puncture cone 3; specifically, the sealing upper cover 2 is screwed onto the upper end of the puncture sleeve 1, and the puncture cone 3 is detachably inserted into the puncture sleeve 1 through the instrument hole of the sealing upper cover 2.

[0057] The puncture device also includes an adapter, which is optional. Schematically, it is any one of the first adapter 4, the second adapter 5, and the third adapter 6. The first adapter 4, the second adapter 5, and the third adapter 6 can be respectively tightened on the connector mounting portion of the side wall of the puncture sleeve 1. Among them, the first adapter, the second adapter, and the third adapter are different types of adapters. Figure 1 The adapter schematically used is the first adapter 4 .

[0058] The puncture cannula (1) in the embodiment of the present application comprises 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 by the interlayer between the outer cannula (101) and the inner cannula (102); and a second gas channel is formed by the instrument hole of the sealing upper cover (2) and the inner cannula (102).

[0060] In order 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 are sealed by the first O-ring 103;

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

[0062] Here, there are four guide grooves 1022 evenly distributed on the outer wall of the lower end of the inner sleeve 102, and four fluid grooves 1016 evenly distributed on the inner wall of the outer sleeve 101. The fluid grooves 1016 here are through-through, that is, extending from the upper end of the outer sleeve 101 to the lower end of the outer sleeve 101. It should be noted that the width of each fluid groove 1016 here is equal to the width of the guide groove 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 to ensure 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 the guide groove 1022 is V-shaped. Correspondingly, there are 4 air inlet nozzles 1015 evenly distributed on the outer wall of the lower end of the outer sleeve 101, and the downward protrusions of each guide groove 1022 are respectively aligned with the 4 air inlet nozzles 1015 on the outer sleeve 101 to facilitate the circulation of gas.

[0063] In order to make the inner sleeve 102 more firmly sleeved on the outer sleeve 101, a circular 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 surface 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 respectively lead to the four evenly distributed guide grooves 1022 of the inner sleeve 102, that is, the protrusions of the guide grooves 1022 are inserted into the outer sleeve 101 along the fluid grooves 1016, and the V-shaped grooves of the guide grooves 1022 correspond exactly to the air inlet nozzles 1015. Due to the blocking of the guide grooves 1022, the interlayer of the inner sleeve and the outer sleeve is blocked and divided into four channels, flowing to the four air inlet nozzles 1015, forming a double sleeve clamping structure.

[0064] The puncture cannula 1 in the embodiment of the present application further includes: a cannula seat 104;

[0065] A positioning groove 1011 is provided on the outer wall of the upper end of the outer sleeve 101, and a first positioning protrusion 1042 is provided on the inner wall of the corresponding sleeve seat 104. The outer sleeve 101 assembled with the inner sleeve 102 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 on the inner wall of the sleeve seat 104 in the embodiment of the present application, and correspondingly, four locking buckles 1012 are evenly distributed on 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 buckled into the four locking buckles 1012 evenly distributed on the outer sleeve 101, forming self-locking.

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

[0068] Furthermore, in order to increase the friction between the trocar and the abdominal wall during pneumoperitoneum insertion and to 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 the present application may further include a cannula sealing ring 105, which can be sleeved on the upper outer wall of the outer cannula 101 as needed. When the outer cannula 101 is sleeved on 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 in a step shape and is provided with a sealing step 1051. The step-shaped 105 is made of a soft silicone material and has a good sealing effect.

[0071] Furthermore, the puncture cannula 1 in the embodiment of the present application further comprises: a dual-lumen manifold connector 106 and a passage connector 107; the dual-lumen manifold connector 106 is connected to the cannula seat 104 via the passage connector 107;

[0072] Specifically, the two end faces of the passage connector 107 are respectively a first sealing end face 1071 and a second sealing end face 1072. The first sealing end face 1071 of the passage connector 107 is inserted into the groove of the passage interface 1013 of the outer sleeve 101, and the second sealing end face 1072 of the passage 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 is connected to the interlayer formed by the outer sleeve 101 and the inner sleeve 102.

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

[0074] Furthermore, a plurality of guide vanes 1023 are evenly arranged around the outer wall of the upper end of the inner sleeve 102 for stabilizing the flow and guiding the gas.

[0075] Here, after the gas passes through the first gas passage 1061 of the dual-cavity manifold connector 106, it passes through the guide vanes 1023 of the inner sleeve 102 and the fluid groove 1016 of the outer sleeve 101, that is, the sandwich channel between the outer sleeve 101 and the inner sleeve 102, and 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-cavity 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 surface 1071 and the groove of the passage interface 1013, and a second O-ring 108 is also installed between the second sealing end surface 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-cavity manifold connector 106 through a second O-ring 108. Both connection surfaces are provided with a second O-ring 108, which will not be repeated 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 cannula base 104, leading to the inner cannula 102 and the instrument hole 1025 in the cannula base 104, forming a second gas passage, namely a smoke exhaust passage.

[0078] Specifically, during smoke evacuation, smoke within the pneumoperitoneum flows through the instrument hole 1025 to the second gas passage 1062 of the dual-lumen manifold connector 106. As the pressure within the pneumoperitoneum decreases, the pneumoperitoneum machine inflates through the first gas passage 1061 of the dual-lumen manifold connector 106. The smoke is then guided by the guide vanes 1023 of the inner cannula 102, enters the fluid groove 1016 of the outer cannula 101, and flows into the gas inlet nozzle 1015 toward the pneumoperitoneum.

[0079] The first gas passage and the second gas passage are gas passages independent of each other.

[0080] The puncture cannula 1 in the embodiment of the present application further includes: a guide cover 109 and an air blocking valve 110 .

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

[0082] Here, the guide cover 109 further includes a guide cover sealing opening 1094 . The diameter of the guide cover sealing opening 1094 is smaller than the diameter of the second annular groove 1101 of the air blocking valve 110 , and can provide a good interference fit to play a sealing role.

[0083] Furthermore, the airtight upper cover 2 is screwed onto the puncture sleeve 1 through 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 upper cover 2 and the puncture sleeve 1 through the instrument hole 1025, exposing the conical 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 more widely adapted to different types of equipment.

[0085] Specifically, the first adapter 4 consists of a first adapter front seat 401 and an adapter rear seat 402. The first adapter front seat 401 includes a first gas passage 4011 and a second gas passage 4012, both of which are connected using a Luer connector 4013. The first adapter front seat 401 and the adapter rear seat 402 are sealed and secured via ultrasonic welding. Furthermore, to prevent slipping, the present application provides a plurality of first anti-slip grooves 4014 on the circumferential surface of the first adapter 4. The first adapter front seat 401 is also provided with ultrasonic welding ribs 4017, which are used to separate the first gas passage 4011 from the second gas passage 4012.

[0086] Accordingly, the adapter rear seat 402 is composed of a first gas passage 4021 and a second gas passage 4022. Ultrasonic welding is used to form passages between the first gas passage 4011 and the second gas passage 4012 and the first gas passage 4021 and the second gas passage 4022 of the adapter rear seat 402.

[0087] In the present invention, 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 to form a passage between the first gas passage 4011 and the second gas passage 4012; 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 being an intake passage and the other an exhaust passage;

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

[0090] The adapter rear seat 402 is provided with threads 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 both adopts a tapered pipe interface 5013. Furthermore, in order to prevent slipping, the present application provides a plurality of second anti-slip grooves 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. The connection method is the same as the first adapter 4 mentioned above, so that the first gas passage 5011, the second gas passage 5012 and the first gas passage 4021 and the second gas passage 4022 of the adapter rear seat 402 respectively form passages.

[0092] On the other hand, the third adapter consists of a third adapter front seat 601 and an adapter rear seat 402. The third adapter 6 includes a first gas passage 6011 and a second gas passage 6012. The first and second gas passages 6011 and 6012 are connected using a Luer connector 6013 and a tapered tube connector 6014, respectively. To prevent slipping, the present application provides a plurality of third anti-slip grooves 6015 on the circumferential surface of the third adapter front seat 601. The rear end structure of the third adapter front seat 601 is identical to that of the first adapter front seat 401. The third adapter front seat 601 and adapter rear seat 402 are sealed and secured via ultrasonic welding, using the same connection method as the first adapter 4 described above, forming passages between the first and second gas passages 6011 and 6012 and the first and second gas passages 4021 and 4022 of the adapter rear seat 402, respectively.

[0093] The working process of a double-lumen laparoscopic trocar according to one embodiment of the present invention is as follows:

[0094] The three adapters here all have air intake and smoke exhaust channels. For the sake of convenience of description, the first channel is defined as the air intake channel and the second channel is defined as the smoke exhaust channel in the embodiment of this application. The 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-lumen manifold connector 106, the gas passes through the first gas passage interface 1045 and the passage interface 1013, and enters the space between the outer sleeve 101 and the inner sleeve 102. The gas then flows downward toward the air inlet nozzle 1015 and is ejected from the air inlet nozzle 1015. Here, the space 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 channel is as follows:

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

[0099] The trocar introduced in the present invention has at least the following advantages:

[0100] (1) In surgical operations, the laparoscopic trocar with a double-lumen structure of the present invention can simultaneously control air intake and smoke exhaust through one trocar, thereby reducing the need for one trocar in the operation. Moreover, because the outer diameter of the cannula of the trocar of the present invention is close to that of an ordinary single-lumen trocar, it can reduce trauma to the human body and increase the success rate of the operation.

[0101] (2) The present invention has a simple structure, good effect, low cost and easy process implementation.

[0102] 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.

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

2. The trocar according to claim 1, characterized in that: The puncture cannula (1) comprises 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); and a second gas channel is formed through the instrument hole of the sealing upper cover (2) and the inner cannula (102).

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

4. The trocar according to claim 3, characterized in that: The outer wall of the lower end of the inner sleeve (102) is evenly provided with a guide groove (1022) in the circumferential direction, and correspondingly, the inner wall of the outer sleeve (101) is evenly 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 guide groove (1022).

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

6. The trocar according to claim 5, characterized in that: It also includes a sleeve seat (104), and 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 trocar according to claim 6, characterized in that: It also includes a double-lumen manifold connector (106) and a passage connector (107); the double-lumen manifold connector (106) is connected to the sleeve seat (104) through the passage connector (107); the double-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 the instrument hole (1025) in the middle of the inner sleeve (102).

8. The trocar according to claim 7, characterized in that: It also includes a guide cover (109) and a choke valve (110), wherein the guide cover (109) and the choke valve (110) are sealed by ultrasonic welding.

9. The trocar according to claim 8, characterized in that: The passage connector (107) is sealedly connected to the passage interface (1013) of the outer sleeve (101) and the gas passage of the double-chamber manifold connector (106) through a second O-ring (108).

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

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