Puncture outfit for endoscopic surgery

Abstract

The utility model provides a puncture outfit for endoscopic surgery, which comprises a puncture cannula, the puncture cannula is provided with a working channel and a gas-water injection port communicated with the working channel, a gas-water diverter valve is arranged in the working channel, and the gas-water diverter valve is provided with an insertion channel, a storage cavity and a plurality of diverter holes. The insertion channel is communicated with the working channel, the storage cavity is arranged on the outer periphery of the insertion channel in a surrounding mode and communicated with the insertion channel through the multiple flow dividing holes, the storage cavity is communicated with the air-water injection port, and the multiple flow dividing holes are distributed in the circumferential direction of the insertion channel at intervals. The endoscope can be flushed without being drawn out, and use is convenient.

Description

Technical Field

[0001] This utility model relates to puncture devices, specifically to a puncture device for laparoscopic surgery. Background Technology

[0002] Laparoscopic surgery is a minimally invasive surgical procedure that involves inserting an endoscope through a trocar into the abdominal cavity. The images captured by the endoscope are projected onto a monitor via fiber optic cable, allowing the surgeon to observe the screen and perform the surgical procedure. During laparoscopic surgery, a channel is created in the abdominal wall using the trocar's cannula and core, enabling surgical instruments and the endoscope to enter the abdominal cavity and perform the procedure.

[0003] During laparoscopic surgery, the endoscope needs to maintain stable clarity at all times. However, due to the temperature difference between the carbon dioxide gas used for pneumoperitoneum and the temperature inside the abdominal cavity, as well as the heat generated by the energy scalpel during the laparoscopic procedure, fogging often forms on the endoscope inside the abdominal cavity, causing the lens to become blurry. Furthermore, once the endoscope enters the abdominal cavity, it may encounter bleeding tissue, resulting in bloodstains on the lens and further contamination.

[0004] In existing techniques, when an endoscope becomes blurry or contaminated, it is usually necessary to remove it from the puncture cannula, wipe it clean, and then reinsert it through the puncture hole to continue the procedure. However, because the factors causing blurring and contamination still exist, the endoscope will become blurry or contaminated again after a period of operation following reinsertion of the puncture cannula. During surgery, there have even been instances where the endoscope became contaminated less than half a minute after insertion, necessitating repeated removal and cleaning of the endoscope throughout the laparoscopic procedure. This inconvenience hinders the smooth progress of the surgery. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems and provide a trocar for laparoscopic surgery, which can rinse the endoscope without removing it, making it convenient to use.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A trocar for laparoscopic surgery includes a trocar cannula. The trocar cannula has a working channel and a gas-water injection port communicating with the working channel. A gas-water diversion valve is installed in the working channel. The gas-water diversion valve has an insertion channel, a storage cavity, and a plurality of diversion holes. The insertion channel communicates with the working channel. The storage cavity is disposed around the outer periphery of the insertion channel and communicates with the insertion channel through the plurality of diversion holes. The storage cavity communicates with the gas-water injection port. The plurality of diversion holes are distributed at intervals along the circumference of the insertion channel.

[0008] Furthermore, the gas-water diversion valve includes a first valve sleeve, a second valve sleeve, and a third valve sleeve that are sequentially connected and coaxially arranged. The inner cavities of the first valve sleeve, the second valve sleeve, and the third valve sleeve together form the insertion channel. The outer peripheral walls of the first valve sleeve and the third valve sleeve are in sealed contact with the inner wall of the working channel. The outer peripheral wall of the second valve sleeve is spaced apart from the puncture cannula to form the storage cavity. A plurality of diversion holes are spaced apart on the second valve sleeve.

[0009] Furthermore, the second valve sleeve connects the bottom surface of the first valve sleeve and the top surface of the third valve sleeve. The outer diameter of the second valve sleeve is smaller than the outer diameter of the bottom surface of the first valve sleeve and the outer diameter of the top surface of the third valve sleeve, thereby forming a concave portion on the outer wall of the gas-water diversion valve. The concave portion constitutes the storage cavity.

[0010] Furthermore, the concave portion is provided with a spiral groove, and the diversion hole is located at the spiral groove.

[0011] Furthermore, at least one water-blocking protrusion is provided between two adjacent diversion holes, and several water-blocking protrusions are distributed at intervals along the circumference of the concave portion.

[0012] Furthermore, a first mounting groove is recessed on the outer peripheral wall of the first valve sleeve, the first mounting groove extends circumferentially along the first valve sleeve, and a first sealing ring is provided in the first mounting groove, the first sealing ring being in sealing contact with the inner wall of the puncture sleeve.

[0013] Furthermore, a second mounting groove is recessed on the outer peripheral wall of the third valve sleeve, the second mounting groove extends circumferentially along the third valve sleeve, and a second sealing ring is provided in the second mounting groove, the second sealing ring being in sealing contact with the inner wall of the puncture sleeve.

[0014] Furthermore, an air-water injection pipe is connected to the air-water injection port, and an air-water injection valve is installed on the air-water injection pipe.

[0015] Furthermore, the puncture device also includes a pneumatic-hydraulic injection assembly, which includes a main connecting tube, a first tee connector, a pneumoperitoneum tube, a second tee connector, a connecting tube, a first flushing branch tube, and a second flushing branch tube;

[0016] One end of the main connecting pipe is connected to the gas-water injection pipe, and the other end of the main connecting pipe is connected to the first interface of the first tee connector.

[0017] One end of the pneumoperitoneum tube is connected to the second interface of the first three-way connector via a first one-way valve, and the other end of the pneumoperitoneum tube is used to connect to a carbon dioxide pneumoperitoneum machine.

[0018] One end of the connecting pipe is connected to the third interface of the first tee connector via a second one-way valve, and the other end of the connecting pipe is connected to the first interface of the second tee connector.

[0019] One end of the first flushing branch pipe is connected to the second interface of the second three-way connector, and a third one-way valve is installed on the first flushing branch pipe. The other end of the first flushing branch pipe is used to connect to a container containing flushing fluid.

[0020] One end of the second flushing branch tube is connected to the third interface of the second three-way connector, and the other end of the second flushing branch tube is used to connect to the negative pressure suction syringe.

[0021] Furthermore, the first check valve, the second check valve, and the third check valve are all Luer check valves.

[0022] Furthermore, the gas-water injection assembly also includes a protective cover, and the first tee connector, the second tee connector, the first check valve, the second check valve and the third check valve are all installed inside the protective cover.

[0023] Furthermore, the puncture device includes a cannula seat, an air-blocking valve, and a conversion cap. The cannula seat is provided with a clearance notch. The puncture cannula passes through the cannula seat, and the gas-water injection tube extends out of the cannula seat through the clearance notch. The air-blocking valve is installed on the puncture cannula, and the conversion cap is installed on the cannula seat, pressing the air-blocking valve against the puncture cannula.

[0024] By adopting the above technical solution, this utility model has the following beneficial effects:

[0025] 1. The aforementioned trocar for laparoscopic surgery is equipped with a gas-water diversion valve within the trocar cannula. When the endoscope inserted into the trocar cannula becomes blurred or contaminated, a flushing solution such as saline can be introduced into the storage cavity through the gas-water injection port. The flushing solution entering the storage cavity flows through the diversion holes along the insertion channel to the endoscope, thereby flushing the endoscope and achieving the purpose of flushing the endoscope without withdrawing it. Simultaneously, because several diversion holes are distributed circumferentially along the insertion channel, the flushing solution can be diverted to various positions of the endoscope, ensuring that all parts of the endoscope are flushed, resulting in a more thorough cleaning. Furthermore, the gas-water diversion valve is located within the trocar cannula, which does not increase the overall volume of the trocar.

[0026] 2. The aforementioned trocar for laparoscopic surgery also includes a gas-water injection assembly. This assembly, through the installation of a first and a second one-way valve, isolates the injection of carbon dioxide gas for pneumoperitoneum and the injection of irrigation fluid, preventing injected gas from entering the container of irrigation fluid or injected irrigation fluid from entering the pneumoperitoneum tube. This ensures that the injection of gas and irrigation fluid do not interfere with each other. The surgeon can also simultaneously inject gas or irrigation fluid into the trocar as needed, improving work efficiency. A third one-way valve allows the negative pressure aspiration syringe to draw irrigation fluid from the container into the syringe during piston retraction, and conversely, to push the syringe's piston forward, pushing the irrigation fluid into the gas-water injection port instead of the container. This gas-water injection assembly eliminates the need to operate valves to control fluid flow during the injection of gas or irrigation fluid into the trocar cannula, making it more convenient to use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the puncture device according to the first embodiment of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the cannula seat in the trocar shown;

[0029] Figure 3 for Figure 1 The diagram shows the structure of the conversion cap in the puncture device;

[0030] Figure 4 for Figure 1 A schematic diagram of the puncture cannula in the puncture device shown;

[0031] Figure 5 for Figure 1 Top view;

[0032] Figure 6 This is a schematic diagram of the gas-water separation valve according to the first embodiment of the present invention;

[0033] Figure 7 for Figure 6 Top view;

[0034] Figure 8 for Figure 7 Sectional view along line BB;

[0035] Figure 9 for Figure 5 Sectional view along line AA;

[0036] Figure 10 This is a schematic diagram of the air-water injection assembly according to the first embodiment of the present invention;

[0037] Figure 11 for Figure 10 A perspective structural diagram of part of the structure;

[0038] Figure 12 This is a schematic diagram of the air-water diversion valve in the puncture device according to the second embodiment of this utility model;

[0039] Figure 13 This is a schematic diagram of the air-water diversion valve in the puncture device according to the third embodiment of this utility model;

[0040] In the attached diagram, 100 is the puncture device; 10 is the cannula seat; 11 is the receiving cavity; 12 is the clearance notch; 13 is the first opening; 14 is the second opening; 20 is the puncture cannula; 21 is the working channel; 22 is the gas-water injection port; 221 is the gas-water injection pipe; 223 is the gas-water injection valve; 23 is the mounting cylinder; 231 is the receiving part; 233 is the through port; 24 is the connecting pipe; 40 is the air-blocking valve; 41 is the slit part; 50 is the conversion cap; 51 is the puncture hole; 60 is the gas-water diversion valve; 61 is the insertion channel; 63 is the storage cavity; 65 is the diversion hole; 66 is the first valve sleeve; 661 is the insertion opening; 662 is the first mounting groove; 663 is the positioning part; 67 is the second valve sleeve; 671 is the spiral groove; 673 is the water-blocking protrusion; 68 is the third valve sleeve; 681 is the connecting opening; 682 is the... Second mounting slot; 683, clearance notch; 70, first sealing ring; 80, second sealing ring; 90, air-water injection assembly; 91, main connecting pipe; 911, first connector; 912, second connector; 921, first tee connector; 922, second tee connector; 923, first interface; 924, second interface; 925, third interface; 93, pneumoperitoneum tube; 94, connecting pipe; 95, first flushing branch pipe; 951, first pipe body; 953, second pipe body; 96, second flushing branch pipe; 971, first one-way valve; 972, second one-way valve; 973, third one-way valve; 981, first Luer one-way female connector; 982, second Luer one-way female connector; 99, protective cover; 200, carbon dioxide pneumoperitoneum machine; 300, container; 400, negative pressure suction syringe. Detailed Implementation

[0041] 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.

[0042] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] Please see Figure 1 , Figure 5 and Figure 9 The first embodiment of this utility model provides a trocar 100 for laparoscopic surgery, comprising a cannula seat 10, a trocar 20, a gas-water diversion valve 60, a gas-blocking valve 40, and a conversion cap 50. The trocar 20 passes through the cannula seat 10, the gas-water diversion valve 60 is installed inside the trocar 20, the gas-blocking valve 40 is installed on the trocar 20, and the conversion cap 50 is installed on the cannula seat 10, pressing the gas-blocking valve 40 against the trocar 20. It is understood that the trocar 100 may also include other components, such as a trocar core, etc., which are prior art and will not be described further here for brevity.

[0045] Please see also Figure 2 In this embodiment, the sleeve seat 10 is generally bowl-shaped, and the sleeve seat 10 has a receiving cavity 11 and a first opening 13 and a second opening 14 located at both ends of the receiving cavity 11 and communicating with the receiving cavity 11. A clearance notch 12 communicating with the receiving cavity 11 is provided on one side of the sleeve seat 10.

[0046] Please see also Figure 4 The puncture cannula 20 is provided with a working channel 21 and a gas / water injection port 22 communicating with the working channel 21. Specifically, the puncture cannula 20 includes an installation cylinder 23 and a connecting tube 24 connected to and communicating with one end of the installation cylinder 23. The outer diameter of the installation cylinder 23 is larger than the outer diameter of the connecting tube 24. The installation cylinder 23 forms a receiving portion 231, which extends through both ends of the installation cylinder 23 to form through-holes 233 at both ends of the installation cylinder 23. One end of the connecting tube 24 communicates with the receiving portion 231 through a through-hole 233, and the end of the connecting tube 24 away from the installation cylinder 23 is an open end. The lumen of the connecting tube 24 and the receiving portion 231 together constitute the working channel 21, which is used for the insertion of a puncture core with an endoscope and laparoscopic surgical instruments. The gas-water injection port 22 is located on the peripheral wall of the mounting cylinder 23 and communicates with the receiving cavity 11. In this embodiment, a gas-water injection pipe 221 is fixedly connected to the gas-water injection port 22, and a gas-water injection valve 223 is installed on the gas-water injection pipe 221 to control the opening and closing of the gas-water injection pipe 221. The gas-water injection valve 223 can adopt a valve structure used in the prior art to control the opening and closing of the pipeline, such as a plug valve, etc., which will not be described in detail here for the sake of brevity. The piercing sleeve 20 passes through the receiving cavity 11. Specifically, the mounting cylinder 23 is installed in the receiving cavity 11 of the sleeve seat 10, the connecting pipe 24 passes through the second opening 14 to extend outside the sleeve seat 10, the gas-water injection pipe 221 passes through the clearance notch 12, and the gas-water injection valve 223 is located outside the sleeve seat 10 for easy operation. Specifically, during installation, the gas-water injection pipe 221 can be aligned with the clearance notch 12, and the piercing sleeve 20 can be inserted from the first opening 13 of the sleeve seat 10 until the installation cylinder 23 is located in the receiving cavity 11 of the sleeve seat 10. The connecting pipe 24 passes through the second opening 14 to extend out of the sleeve seat 10, and the gas-water injection pipe 221 passes through the clearance notch 12 to extend out of the sleeve seat 10.

[0047] Please see also Figures 6 to 8 The working channel 21 is equipped with a gas-water diversion valve 60. The gas-water diversion valve 60 has an insertion channel 61, a storage cavity 63 and several diversion holes 65. The insertion channel 61 is connected to the working channel 21 and is used for the passage of the puncture core and laparoscopic surgical instruments. The storage cavity 63 is arranged around the outer periphery of the insertion channel 61 and is connected to the insertion channel 61 through several diversion holes 65. The storage cavity 63 is connected to the gas-water injection port 22. The several diversion holes 65 are distributed at intervals along the circumference of the insertion channel 61.

[0048] In this embodiment, the gas-water split valve 60 is installed in the receiving portion 231 of the mounting cylinder 23. The gas-water split valve 60 includes a first valve sleeve 66, a second valve sleeve 67, and a third valve sleeve 68 that are connected in sequence and coaxially arranged. The inner cavities of the first valve sleeve 66, the second valve sleeve 67, and the third valve sleeve 68 are interconnected to form the insertion channel 61. The insertion channel 61 is connected to the connecting pipe 24 and passes through the opposite ends of the gas-water split valve 60. An insertion opening 661 is formed at the end of the first valve sleeve 66 away from the second valve sleeve 67, and a communication opening 681 is formed at the end of the third valve sleeve 68 away from the second valve sleeve 67. The insertion channel 61 is connected to the connecting pipe 24 through the communication opening 681.

[0049] In this embodiment, the outer peripheral walls of the first valve sleeve 66 and the third valve sleeve 68 are in sealed contact with the inner wall of the puncture sleeve 20. The outer peripheral wall of the second valve sleeve 67 is spaced apart from the puncture sleeve 20 to form a storage cavity 63. Specifically, the second valve sleeve 67 connects the bottom surface of the first valve sleeve 66 and the top surface of the third valve sleeve 68. The outer diameter of the second valve sleeve 67 is smaller than the outer diameter of the bottom surface of the first valve sleeve 66 and the outer diameter of the top surface of the third valve sleeve 68, thereby forming a concave portion on the outer wall of the gas-water diversion valve 60, which constitutes the storage cavity 63. A first mounting groove 662 is recessed on the outer peripheral wall of the first valve sleeve 66. The first mounting groove 662 extends circumferentially along the first valve sleeve 66. A first sealing ring 70 is provided in the first mounting groove 662, and the first sealing ring 70 is in sealed contact with the inner wall of the mounting cylinder 23 of the puncture sleeve 20. A second mounting groove 682 is recessed on the outer peripheral wall of the third valve sleeve 68, extending circumferentially along the third valve sleeve 68. A second sealing ring 80 is disposed within the second mounting groove 682, and the second sealing ring 80 makes sealing contact with the inner wall of the mounting cylinder 23 of the puncture sleeve 20. The first sealing ring 70 and the second sealing ring 80 prevent gas or flushing fluid entering the storage cavity 63 from leaking out of the storage cavity 63, improving the sealing performance of the storage cavity 63. A plurality of diversion holes 65 are spaced apart on the second valve sleeve 67, connecting the storage cavity 63 and the insertion channel 61. In this embodiment, the plurality of diversion holes 65 are divided into two groups, with the two groups of diversion holes 65 spaced apart along the axial direction of the puncture sleeve 20. Each group of diversion holes 65 includes multiple diversion holes 65 spaced apart around the insertion channel 61, and the diversion holes 65 in the two groups are staggered, resulting in better diversion effect. It is understood that the arrangement of the diversion hole 65 is not limited to this embodiment. For example, in other embodiments, only one set or more sets of diversion holes 65 may be provided.

[0050] In the prior art, the inner wall of the puncture sleeve 20 is provided with a protrusion (not shown). In this embodiment, the third valve sleeve 68 of the gas-water diversion valve 60 is provided with a clearance notch 683 that engages with the protrusion 25. The clearance notch 683 allows the gas-water diversion valve 60 to be smoothly installed into the puncture sleeve 20. Simultaneously, the engagement of the clearance notch 683 with the protrusion on the puncture sleeve 20 positions the gas-water diversion valve 60, preventing it from rotating relative to the puncture sleeve 20. Furthermore, in this embodiment, the top surface of the first valve sleeve 66 is provided with a positioning part 663, which corresponds to the position of the clearance notch 683. By providing the positioning part 663 corresponding to the position of the clearance notch 683, a foolproof function is provided, helping workers determine the location of the clearance notch 683 during installation, thereby ensuring that the clearance notch 683 and the protrusion 25 can be smoothly engaged, improving installation efficiency. In this embodiment, the positioning part 663 is a positioning groove recessed on the top of the first valve sleeve 66. It is understood that the structure of the positioning part 663 is not limited to this embodiment; for example, it may also be a positioning protrusion provided on the gas-water diversion valve 60.

[0051] Please see also Figure 3 The air-blocking valve 40 is installed at the through-hole 233 at the end of the mounting cylinder 23 away from the connecting tube 24. A slit 41 is provided approximately in the middle of the air-blocking valve 40, extending through the insertion opening 661 into the first valve sleeve 66 of the air-water diversion valve 60. This slit 41 facilitates the insertion of the laparoscopic lens and puncture core into the puncture device 100, and also seals the through-hole 233 at the end of the mounting cylinder 23 away from the connecting tube 24, preventing water from spraying out during endoscope cleaning. The slit 41 can be straight or cross-shaped, etc., and this invention is not limited thereto. A conversion cap 50 is located on the side of the air-blocking valve 40 opposite to the air-water diversion valve 60. The conversion cap 50 is fixedly connected to the sleeve seat 10 and presses against the air-blocking valve 40 to press the air-blocking valve 40 tightly onto the puncture sleeve 20. The conversion cap 50 has a puncture hole 51 through the middle position, which allows the laparoscopic lens and puncture core to pass through and expose the incision 41.

[0052] Please see also Figure 10 and Figure 11 The puncture device 100 also includes a gas-water injection assembly 90, which includes a main connecting pipe 91, a first tee connector 921, an inflatable tube 93, a second tee connector 922, a connecting pipe 94, a first flushing branch pipe 95, and a second flushing branch pipe 96. Both the first tee connector 921 and the second tee connector 922 have a first interface 923, a second interface 924, and a third interface 925. The structures of the first tee connector 921 and the second tee connector 922 are prior art and will not be described in detail here for brevity.

[0053] One end of the main connecting pipe 91 is connected to the gas-water injection pipe 221, and the other end of the main connecting pipe 91 is connected to the first interface 923 of the first tee connector 921. In this embodiment, one end of the main connecting pipe 91 is connected to the gas-water injection pipe 221 via the first connector 911, and the other end of the main connecting pipe 91 is connected to the first interface 923 of the first tee connector 921 via the second connector 912. Preferably, both the first connector 911 and the second connector 912 are Luer connectors, and the first tee connector 921 is a Luer T-type connector that mates with the first connector 911 and the second connector 912.

[0054] One end of the pneumoperitoneum tube 93 is connected to the second port 924 of the first tee connector 921 via a first one-way valve 971, and the other end of the pneumoperitoneum tube 93 is used to connect to the carbon dioxide pneumoperitoneum machine 200. One end of the connecting tube 94 is connected to the third port 925 of the first tee connector 921 via a second one-way valve 972, and the other end of the connecting tube 94 is connected to the first port 923 of the second tee connector 922. In this embodiment, both the first one-way valve 971 and the second one-way valve 972 are Luer one-way connectors that are inserted into the first tee connector 921.

[0055] One end of the first flushing branch pipe 95 is connected to the second interface 924 of the second tee connector 922, and the other end of the first flushing branch pipe 95 is used to connect to a container 300 containing flushing fluid. A third one-way valve 973 is installed on the first flushing branch pipe 95. In this embodiment, the third one-way valve 973 is a Luer one-way connector. The first flushing branch pipe 95 includes a first pipe body 951 and a second pipe body 953. One end of the first pipe body 951 is connected to one end of the second pipe body 953 via the third one-way valve 973. The other end of the first pipe body 951 is connected to the second interface 924 of the second tee connector 922. The other end of the second pipe body 953 is connected to a first Luer one-way female connector 981, which is used to connect to the container 300 containing flushing fluid. The container 300 can be an infusion bottle or an infusion bag, etc.

[0056] One end of the second flushing branch tube 96 is connected to the third interface 925 of the second tee connector 922, and the other end of the second flushing branch tube 96 is used to connect to the negative pressure suction syringe 400. In this embodiment, the other end of the second tube body 953 is connected to a second Luer one-way female connector 982, which is used to connect to the negative pressure suction syringe 400.

[0057] The gas-water injection assembly 90 also includes a protective cover 99, within which are installed the first tee connector 921, the second tee connector 922, the first one-way valve 971, the second one-way valve 972, the third one-way valve 973, and the second connector 912. By providing the protective cover 99, the first tee connector 921, the second tee connector 922, the first one-way valve 971, the second one-way valve 972, the third one-way valve 973, and the second connector 912 are protected, and external impurities are further prevented from entering the pipeline through the connection points, thus reducing the risk of infection.

[0058] Please see also Figure 12 The second embodiment of this utility model provides a trocar for laparoscopic surgery, which has a structure largely the same as the trocar in the first embodiment. Both include a cannula seat 10, a trocar cannula 20, a gas-water diversion valve 60, a gas-blocking valve 40, and a conversion cap 50. The trocar cannula 20 passes through the cannula seat 10, the gas-water diversion valve 60 is installed inside the trocar cannula 20, the gas-blocking valve 40 is installed on the trocar cannula 20, and the conversion cap 50 is installed on the cannula seat 10, pressing the gas-blocking valve 40 tightly against the trocar cannula 20. The difference lies in the structure of the gas-water diversion valve 60. In this embodiment, the gas-water diversion valve 60 has a spiral groove 671 on its inner concave portion, and the diversion orifice 65 of the gas-water diversion valve 60 is located at the spiral groove 671.

[0059] Please see also Figure 13 The third embodiment of this utility model provides a trocar for laparoscopic surgery, which has a structure largely the same as the trocar in the first embodiment. Both include a cannula seat 10, a trocar 20, a gas-water diversion valve 60, a gas-blocking valve 40, and a conversion cap 50. The trocar 20 passes through the cannula seat 10, the gas-water diversion valve 60 is installed inside the trocar 20, the gas-blocking valve 40 is installed on the trocar 20, and the conversion cap 50 is installed on the cannula seat 10, pressing the gas-blocking valve 40 against the trocar 20. The difference lies in the structure of the gas-water diversion valve 60. In this embodiment, at least one water-blocking protrusion 673 is provided between two adjacent diversion holes 65 of the gas-water diversion valve 60, and several water-blocking protrusions 673 are distributed circumferentially along the concave portion.

[0060] When using the aforementioned trocar 100 for laparoscopic surgery, the air-water injection valve 223 is adjusted to ensure the air-water injection tube 221 is in a conductive state; the pneumoperitoneum tube 93 is connected to the carbon dioxide pneumoperitoneum machine 200, the first Luer one-way female connector 981 is connected to the container 300 containing irrigation fluid, and a negative pressure aspiration syringe 400 is connected to the second Luer one-way female connector 982. During the endoscopic operation, the endoscope sequentially enters the abdominal cavity through the puncture hole 51, the incision 41, the insertion channel 61, and the connecting tube 24 to perform the operation. When the endoscope lens experiences blurred vision or contamination such as blood, the piston (not labeled) of the negative pressure aspiration syringe 400 is pulled back. This creates a negative pressure within the syringe 400, causing the flushing fluid to flow from the container 300 sequentially through the first flushing branch tube 95, the second tee connector 922, and the second flushing branch tube 96 into the syringe 400. Then, the piston of the syringe 400 is pushed forward, allowing the flushing fluid within the syringe 400 to flow sequentially through the second flushing branch tube 96. Branch pipe 96, second tee connector 922, connecting pipe 94, second one-way valve 972, first tee connector 921, second connector 912, main connecting pipe 91, first connector 911, gas-water injection pipe 221 and gas-water injection port 22 enter the storage cavity 63, and then enter the insertion channel 61 through several diversion holes 65. The flushing fluid in the insertion channel 61 enters the connecting tube body 24 along the insertion channel 61, and flows downward along the connecting tube body 24 to flush the endoscope located below the connecting tube body 24.

[0061] When using the aforementioned trocar 100 for laparoscopic surgery, if it is necessary to introduce carbon dioxide gas for pneumoperitoneum into the abdominal cavity, adjust the gas-water injection valve 223 to make the gas-water injection tube 221 open; turn on the carbon dioxide pneumoperitoneum machine 200, so that the carbon dioxide gas passes through the pneumoperitoneum tube 93, the first one-way valve 971, the first three-way connector 921, the main connecting tube 91, the first connector 911, the gas-water injection tube 221 and the gas-water injection port 22 in sequence into the storage chamber 63, and then enters the insertion channel 61 through several diversion holes 65. The gas entering the insertion channel 61 enters the connecting tube body 24 along the insertion channel 61 and flows into the abdominal cavity along the connecting tube body 24.

[0062] When the air-water injection assembly 90 is not needed, the air-water injection valve 223 can be adjusted to keep the air-water injection pipe 221 in a closed state.

[0063] The aforementioned trocar 100 for laparoscopic surgery includes a gas-water diversion valve 60 within the trocar cannula 20. When the endoscope inserted into the trocar cannula 20 becomes blurry or contaminated, a flushing solution such as saline can be introduced into the storage cavity 63 through the gas-water injection port 22. The flushing solution entering the storage cavity 63 is diverted through the diversion holes 65 and flows along the insertion channel 61 to the endoscope, thereby flushing the endoscope and achieving the purpose of flushing the endoscope without withdrawing it. Simultaneously, since several diversion holes 65 are spaced circumferentially along the insertion channel 61, the flushing solution can be diverted to various parts of the endoscope, ensuring that all parts of the endoscope are flushed and thoroughly cleaned. Furthermore, the gas-water diversion valve 60 is located within the trocar cannula 20, without increasing the overall volume of the trocar 100.

[0064] The aforementioned trocar 100 for laparoscopic surgery also includes a gas-water injection assembly 90. This assembly, through the provision of a first one-way valve 971 and a second one-way valve 972, isolates the injection of carbon dioxide gas for pneumoperitoneum and the injection of irrigation fluid. This prevents the injected gas from entering the container 300 containing irrigation fluid or the injected irrigation fluid from entering the pneumoperitoneum tube 93, ensuring that the injection of gas and irrigation fluid do not interfere with each other. The surgeon can also simultaneously inject gas or irrigation fluid into the trocar 100 as needed, improving work efficiency. A third one-way valve 973 allows the negative pressure aspiration syringe 400 to draw irrigation fluid from the container 300 into the syringe during piston retraction, and conversely, to push the irrigation fluid into the gas-water injection port 22 instead of into the container 300 during piston push-forward. The gas-water injection assembly 90 eliminates the need to operate valves to control the flow of fluid during the injection of gas or flushing fluid into the puncture cannula 20, making it more convenient to use.

[0065] The aforementioned trocar for laparoscopic surgery has a spiral groove 671 on the concave portion of the gas-water diversion valve 60, and the diversion orifice 65 of the gas-water diversion valve 60 is located at the spiral groove 671. The spiral groove 671 on the concave portion of the gas-water diversion valve 60 and the location of the diversion orifice 65 at the spiral groove 671 allow the water entering the storage chamber 63 to be more evenly distributed around the periphery of the gas-water diversion valve 60, thereby making the pressure and force of the water exiting each diversion orifice 65 more uniform, which is beneficial to improving the flushing effect.

[0066] The aforementioned trocar used for laparoscopic surgery can increase the water level at the diversion hole 65 by using the water-blocking protrusion 673 provided between two adjacent diversion holes 65 of the air-diversion valve 60, thereby increasing the water output of the diversion hole 65 and improving the flushing effect.

[0067] It is understandable that the trocar 100 is not limited to use in laparoscopic surgery, but can also be used in arthroscopic surgery and thoracoscopic surgery.

[0068] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A trocar for laparoscopic surgery, comprising a trocar cannula, the trocar cannula having a working channel and an air-water injection port communicating with the working channel, characterized in that: The working channel is equipped with a gas-water diversion valve. The gas-water diversion valve has an insertion channel, a storage cavity and several diversion holes. The insertion channel is connected to the working channel. The storage cavity is arranged around the outer periphery of the insertion channel and is connected to the insertion channel through several diversion holes. The storage cavity is connected to the gas-water injection port. The several diversion holes are distributed circumferentially along the insertion channel.

2. The trocar for laparoscopic surgery as described in claim 1, characterized in that: The gas-water diversion valve includes a first valve sleeve, a second valve sleeve, and a third valve sleeve that are connected in sequence and coaxially arranged. The inner cavities of the first valve sleeve, the second valve sleeve, and the third valve sleeve together form the insertion channel. The outer peripheral walls of the first valve sleeve and the third valve sleeve are in sealed contact with the inner wall of the working channel. The outer peripheral wall of the second valve sleeve is spaced apart from the puncture cannula to form the storage cavity. A plurality of diversion holes are spaced apart on the second valve sleeve.

3. The trocar for laparoscopic surgery as described in claim 2, characterized in that: The second valve sleeve connects the bottom surface of the first valve sleeve and the top surface of the third valve sleeve. The outer diameter of the second valve sleeve is smaller than the outer diameter of the bottom surface of the first valve sleeve and the outer diameter of the top surface of the third valve sleeve, thereby forming a concave portion on the outer wall of the gas-water diversion valve. The concave portion constitutes the storage cavity.

4. The trocar for laparoscopic surgery as described in claim 3, characterized in that: The concave portion is provided with a spiral groove, and the diversion hole is located at the spiral groove.

5. The trocar for laparoscopic surgery as described in claim 3, characterized in that: At least one water-blocking protrusion is provided between two adjacent diversion holes, and several water-blocking protrusions are distributed at intervals along the circumference of the concave portion.

6. The trocar for laparoscopic surgery as described in claim 1, characterized in that: An air-water injection pipe is connected to the air-water injection port, and an air-water injection valve is installed on the air-water injection pipe.

7. The trocar for laparoscopic surgery as described in claim 6, characterized in that: The puncture device also includes a gas-water injection assembly, which includes a main connecting tube, a first tee connector, an inflatable tube, a second tee connector, a connecting tube, a first flushing branch tube, and a second flushing branch tube. One end of the main connecting pipe is connected to the gas-water injection pipe, and the other end of the main connecting pipe is connected to the first interface of the first tee connector. One end of the pneumoperitoneum tube is connected to the second interface of the first three-way connector via a first one-way valve, and the other end of the pneumoperitoneum tube is used to connect to a carbon dioxide pneumoperitoneum machine. One end of the connecting pipe is connected to the third interface of the first tee connector via a second one-way valve, and the other end of the connecting pipe is connected to the first interface of the second tee connector. One end of the first flushing branch pipe is connected to the second interface of the second three-way connector, and a third one-way valve is installed on the first flushing branch pipe. The other end of the first flushing branch pipe is used to connect to a container containing flushing fluid. One end of the second flushing branch tube is connected to the third interface of the second three-way connector, and the other end of the second flushing branch tube is used to connect to the negative pressure suction syringe.

8. The trocar for laparoscopic surgery as described in claim 7, characterized in that: The first check valve, the second check valve, and the third check valve are all Luer check valves.

9. The trocar for laparoscopic surgery as described in claim 7, characterized in that: The gas-water injection assembly also includes a protective cover, and the first tee connector, the second tee connector, the first one-way valve, the second one-way valve and the third one-way valve are all installed inside the protective cover.

10. The trocar for laparoscopic surgery as described in claim 6, characterized in that: The puncture device includes a cannula seat, an air-blocking valve, and a conversion cap. The cannula seat has a clearance notch. The puncture cannula passes through the cannula seat, and the gas-water injection tube extends out of the cannula seat through the clearance notch. The air-blocking valve is installed on the puncture cannula, and the conversion cap is installed on the cannula seat, pressing the air-blocking valve against the puncture cannula.

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