Endoscopic surgical system

Abstract

The application discloses an endoscope surgery system, which comprises an electronic endoscope and an endoscope surgery instrument, wherein the electronic endoscope comprises an outer sheath, a mirror tube, a one-way valve assembly, an inner sheath, a handle, a plug assembly and a mounting seat, the outer sheath is mounted on the mounting seat, the inner sheath is arranged in the outer sheath, the inner wall of the inner sheath is fixed with the mirror tube, the head end of the mirror tube is provided with a lens part, the side surface of the mounting seat is provided with the handle, the handle is connected with the plug assembly, the surgery channel is arranged in the inner sheath, the inner diameter size of the surgery channel is matched with the endoscope surgery instrument, and the operation end of the endoscope surgery instrument can smoothly pass through the surgery channel. The electronic endoscope is designed by adopting the integrated matching mode, can be compatible with three kinds of surgery instruments including prostate enucleation, tissue pulverization and stone lithotripsy, realizes the function integration of two mirrors and three uses, and only needs to match and install the required endoscope surgery instrument with the electronic endoscope, so that the switching of different surgery function operations can be quickly completed.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, and in particular to endoscopic surgical systems. Background Technology

[0002] For patients with both benign prostatic hyperplasia (BPH) and urinary tract stones (kidney stones), the current standard strategy is to use staged combined surgery, such as treating the kidney stones first and then the prostate, or vice versa. The disadvantage of this approach is that the patient needs to undergo two surgeries and two anesthesias, and requires a long recovery time after each surgery. Some older patients or those in poor general condition cannot tolerate the long combined surgery. Another approach is simultaneous combined surgery, in which the prostate surgery is performed under one anesthesia, and then the instruments are immediately switched to a flexible ureteroscope for lithotripsy. However, the current endoscopic surgical devices lack a quick-change adaptability structure, which cannot achieve efficient switching between prostate surgery instruments and flexible ureteroscopes. This not only significantly increases the overall operation time, but also places higher demands on the patient's cardiopulmonary function. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art by proposing an endoscopic surgical system that can solve the above problems.

[0004] To achieve the above objectives, this invention proposes an endoscopic surgical system, comprising an electronic endoscope and endoscopic surgical instruments. The endoscopic surgical instruments include one or more of an enucleation instrument, an electronic ureteroscope, and a shredder. The electronic endoscope includes an outer sheath, a tube, a one-way valve assembly, an inner sheath, a handle, a plug assembly, and a mounting base. The mounting base has an outer sheath, within which is the inner sheath. The tube is fixed to the inner wall of the inner sheath, and the tube has a lens at its tip. The mounting base has a handle on its side, which is connected to the plug assembly. The inner sheath has a surgical channel with an inner diameter adapted to the endoscopic surgical instruments, allowing the operating end of the instruments to pass through smoothly. The mounting base has a working channel communicating with the surgical channel, coaxially arranged with the surgical channel. An installation port is located at the end of the working channel away from the surgical channel, allowing the enucleation instrument to be installed in conjunction with the installation port. The one-way valve assembly is detachably installed with the installation port. The electronic ureteroscope and the shredder can be sealed and assembled with the one-way valve assembly.

[0005] Preferably, the inner sheath has a guide head at its head end, which protrudes from the head end of the outer sheath. The lens portion has a structure with a large head end and a small rear end. An image sensor is installed inside the large end. A tip is installed on the head end face of the lens portion, and a protective glass is installed on the tip. A predetermined distance is reserved between the end face of the tip and the port of the guide head. The lens portion is located in the guide head. Both the inner and outer sheaths are made of stainless steel, and the guide head is made of ceramic.

[0006] Preferably, the excision instrument includes an operator, a mounting connector, an advance / retractable nut, an electrocautery assembly, and a laser assembly. One end of the operator is detachably mounted to the mounting port, and the other end is detachably mounted to the mounting connector. The operator has a mounting channel coaxially arranged with the surgical channel. The advance / retractable nut has a fixing block inside, which is connected to the mounting connector through a positioning tube. The mounting connector has a first movable groove for axial movement of the fiber optic channel tube and a second movable groove for axial movement of the power cutting rod. The advance / retractable nut has a first threaded cylinder and a second threaded cylinder coaxially arranged with the surgical channel at its head and tail ends, respectively. The threads of the first threaded cylinder and the second threaded cylinder are opposite in direction. The electrocautery assembly is threadedly mounted to the first threaded cylinder, and the laser assembly is threadedly mounted to the second threaded cylinder. When the advance / retractable nut rotates, it can drive the electrocautery assembly and the laser assembly to move in opposite directions or in opposite directions along the axial direction.

[0007] Preferably, the electro-cutting assembly includes an electro-cutting slider, electro-cutting rods, an electrode holder, and an electro-cutting ring. The electro-cutting slider is threadedly installed on a first threaded cylinder. The electrode holder has two electro-cutting rods at its head end, and an electro-cutting ring at the head end of each of the two electro-cutting rods. The tail end of the electrode holder is connected to the electro-cutting slider. The positioning tube passes through the electrode holder and the electro-cutting slider. The laser assembly includes an optical fiber slider, an optical fiber channel tube, and a laser fiber. The optical fiber slider is threadedly installed on a second threaded cylinder. The tail end of the optical fiber slider has an optical fiber locker. The head end of the optical fiber locker has an optical fiber channel tube. The optical fiber channel tube contains a laser fiber. The built-in section of the optical fiber channel tube is movably disposed within the positioning tube. The protruding section of the optical fiber channel tube is located between the two electro-cutting rods. The electro-cutting rods are connected to the positioning ring, and the optical fiber channel tube is movably disposed within the positioning ring.

[0008] Preferably, the manipulator includes a mounting part, a conduit, and a piston tube. One end of the piston tube is slidably mounted in the conduit, and the other end is connected to the mounting part. The mounting part has a mounting groove adapted to the mounting connector, and the mounting part is equipped with a first latch for locking the mounting connector. A first connecting bracket is rotatably mounted on the conduit, and a second connecting bracket is rotatably mounted on the mounting part. The first and second connecting brackets are hinged, and a torsion spring is fitted at the hinge. A sealing element is provided inside the conduit. The outer wall of the piston tube and the inner wall of the conduit form a sliding sealing fit through the sealing element. A finger hook is provided on the mounting part, and a finger buckle is provided on the conduit. The end of the conduit away from the piston tube is provided with a mating connector that matches the mounting port.

[0009] Preferably, the one-way valve assembly includes a housing, a cap, and a valve adhesive. The housing contains a duckbill-shaped valve adhesive and a cap. The cap has an inlet for sealing with an endoscopic surgical instrument. The valve adhesive has a slotted structure at its tip. The housing has a locking head that matches the mounting port. The mounting port has a second latch for securing the locking head.

[0010] The present invention also proposes a method of using the endoscopic surgical system, wherein the endoscopic surgical system is used for the single implementation of prostate enucleation surgery, stone fragmentation surgery, tissue fragmentation and aspiration surgery, or for the simultaneous combined implementation of any two or more of the above surgeries.

[0011] Preferably, when the endoscopic surgical system is used in prostate enucleation surgery, the manipulator connects the electronic endoscope and the enucleation instrument from front to back, so that the enucleation instrument can move axially relative to the electronic endoscope.

[0012] Preferably, when the endoscopic surgical system is used in stone fragmentation surgery, the electronic endoscope accurately locates the ureteral orifice, and the ureteroscope passes through the surgical channel into the ureter.

[0013] The beneficial effects of the present invention are as follows: The electronic endoscope of the present invention adopts an integrated and adaptable design, which is compatible with three surgical instruments for prostate enucleation, tissue pulverization and stone fragmentation, realizing the integration of two endoscopes and three functions. During the operation, there is no need to change the entire set of surgical instruments. Only the required endoscopic surgical instruments need to be matched and installed with the electronic endoscope to quickly complete the switching of different surgical functions. The enucleation instrument of the present invention integrates the dual functions of electrocautery and laser cutting. The relative position of the electrocautery ring and the laser cutting head can be quickly adjusted by turning the nut to ensure that they do not interfere with each other, thereby realizing convenient switching between the electrocautery function and the laser cutting function, effectively reducing the prostate surgery time. For patients suffering from both benign prostatic hyperplasia and urinary tract stones, this invention effectively reduces the surgical time caused by unexpected bleeding during laser removal by rapidly switching between electrocautery loops and laser fiber. In addition, this invention first drains the pulverized stones into the bladder and then removes them from the body with a pulverizing blade. Compared with the operation method of repeatedly aspirating and pulverizing stones using an electronic ureteroscope alone, the operation method of this application effectively shortens the operation time.

[0014] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the electronic endoscope structure of the present invention; Figure 3 This is a cross-sectional view of the electronic endoscope of the present invention; Figure 4 yes Figure 3 A magnified view of part A; Figure 5 This is a schematic diagram of the end of the endpiece of the endpiece tube of the present invention; Figure 6 This is a schematic diagram of the installation of the excision device of the present invention; Figure 7 This is a schematic diagram of the electrocautery mode of the excision device of the present invention; Figure 8 This is a cross-sectional view of the electrocautery mode of the excision device of the present invention; Figure 9 This is a schematic diagram of the positioning ring of the excision device of the present invention; Figure 10 This is a schematic diagram of the laser mode of the excision device of the present invention; Figure 11 This is a cross-sectional view of the laser mode of the excision device of the present invention; Figure 12 This is a schematic diagram of the operator structure of the present invention; Figure 13 This is a cross-sectional view of the operator of the present invention; Figure 14 Schematic diagram of the mounting section of the operator of the present invention; Figure 15 This is a schematic diagram of the shredder installation of the present invention; Figure 16 This is a cross-sectional view of the shredder blade installation of the present invention; Figure 17 This is a schematic diagram of the installation of the electronic ureteroscope of the present invention.

[0016] In the diagram: 1. Electronic endoscope; 2. Removal instrument; 3. Manipulator; 4. Shredder; 5. Electronic ureteroscope; 6. Mounting connector; 7. Advance / reverse nut; 10. Surgical channel; 11. Outer sheath; 12. Endoscope tube; 13. One-way valve assembly; 14. Inner sheath; 15. Handle; 16. Plug assembly; 17. Mounting base; 20. Electrosurgical cutting rod; 21. Electrosurgical cutting ring; 22. Fiber optic channel tube; 23. Electrode holder; 25. Fiber optic locking device; 26. Electrosurgical cutting slider; 27. Fiber optic slider; 28. Positioning ring; 30. Mounting channel; 31. Torsion spring; 32. First locking buckle; 33. Finger hook; 35. Finger 36. Buckle; 37. Conduit; 38. Piston tube; 39. Mounting part; 311. Seal; 312. First connecting bracket; 313. Second connecting bracket; 141. Guide head; 142. Image sensor; 143. Tip; 144. Protective glass; 61. First movable groove; 62. Second movable groove; 70. Positioning tube; 71. Fixing block; 72. First threaded cylinder; 73. Second threaded cylinder; 381. Mounting groove; 121. Lens part; 171. Working channel; 172. Mounting port; 130. Cap; 131. Housing; 132. Valve adhesive; 133. Clip; 361. Connector. Detailed Implementation

[0017] See Figures 1 to 17 An endoscopic surgical system includes an electronic endoscope 1 and endoscopic surgical instruments, the endoscopic surgical instruments including an enucleation instrument 2, an electronic ureteroscope 5, and a shredder 4.

[0018] The electronic endoscope 1 includes an outer sheath 11, a tube 12, a one-way valve assembly 13, an inner sheath 14, a handle 15, a plug assembly 16, and a mounting base 17. The outer sheath 11 is mounted on the mounting base 17, and the inner sheath 14 is provided inside the outer sheath 11. The tube 12 is fixed on the inner wall of the inner sheath 14, and a lens part 121 is provided at the head end of the tube 12. The handle 15 is provided on the side of the mounting base 17, and the plug assembly 16 is connected to the handle 15. The surgical channel 10 is provided in the inner sheath 14. The inner diameter of the surgical channel 10 is adapted to the endoscopic surgical instruments, allowing the operating end of the endoscopic surgical instruments to pass through smoothly. The mounting base 17 is provided with a working channel 171 that communicates with the surgical channel 10. The working channel 171 is coaxially arranged with the surgical channel 10. The end of the working channel 171 away from the surgical channel 10 is provided with an installation port 172. The one-way valve assembly 13 is detachably installed and removed from the installation port 172.

[0019] The inner sheath 14 has a guide head 141 at its head end, which protrudes from the head end of the outer sheath 11. The lens part 121 has a structure with a large head end and a small rear end. An image sensor 142 is installed inside the large end. A tip 143 is installed on the head end face of the lens part 121, and a protective glass 144 is installed on the tip 143. A set distance is reserved between the end face of the tip 143 and the port of the guide head 141. The lens part 121 is located in the guide head 141. Both the inner sheath 14 and the outer sheath 11 are made of stainless steel, and the guide head 141 is made of ceramic.

[0020] The excision instrument 2 includes an operator 3, a mounting connector 6, an advance / retractable nut 7, an electrocautery assembly, and a laser assembly. One end of the operator 3 is detachably mounted to the mounting port 172, and the other end is detachably mounted to the mounting connector 6. The operator 3 has a mounting channel 30 coaxially arranged with the surgical channel 10. The advance / retractable nut 7 has a fixing block 71 inside, which is connected to the mounting connector 6 through a positioning tube 70. The mounting connector 6 has a first movable groove 61 for axial movement of the fiber optic channel tube 22 and a second movable groove 62 for axial movement of the power cutting rod 20. The advance / retractable nut 7 has a first threaded cylinder 72 and a second threaded cylinder 73 coaxially arranged with the surgical channel 10 at its head and tail ends, respectively. The threads of the first threaded cylinder 72 and the second threaded cylinder 73 are opposite in direction. The electrocautery assembly is threadedly mounted to the first threaded cylinder 72, and the laser assembly is threadedly mounted to the second threaded cylinder 73. When the advance / retractable nut 7 rotates, it can drive the electrocautery assembly and the laser assembly to move in opposite directions or in opposite directions along the axial direction.

[0021] The electrocautery assembly includes an electrocautery slider 26, electrocautery rods 20, an electrode holder 23, and an electrocautery ring 21. The electrocautery slider 26 is threadedly installed on the first threaded cylinder 72. The electrode holder 23 has two electrocautery rods 20 at its head end, and an electrocautery ring 21 at the head end of each of the two electrocautery rods 20. The tail end of the electrode holder 23 is connected to the electrocautery slider 26. The positioning tube 70 passes through the electrode holder 23 and the electrocautery slider 26. The laser assembly includes an optical fiber slider 27, an optical fiber channel tube 22, and a laser fiber. The fiber optic slider 27 is threadedly installed with the second threaded cylinder 73. The tail end of the fiber optic slider 27 is provided with a fiber optic lock 25, and the head end of the fiber optic lock 25 is provided with a fiber optic channel tube 22. The fiber optic channel tube 22 contains a laser fiber. The built-in section of the fiber optic channel tube 22 is movably disposed in the positioning tube 70. The protruding section of the fiber optic channel tube 22 is located between two electric cutting rods 20. The electric cutting rods 20 are connected to a positioning ring 28, and the fiber optic channel tube 22 is movably disposed in the positioning ring 28.

[0022] The operator 3 includes a mounting part 38, a conduit 36, and a piston tube 37. One end of the piston tube 37 is slidably mounted in the conduit 36, and the other end is connected to the mounting part 38. The mounting part 38 has a mounting groove 381 adapted to the mounting connector 6, and the mounting part 38 is provided with a first latch 32 for locking the mounting connector 6. A first connecting bracket 311 is rotatably mounted on the conduit 36, and a second connecting bracket 312 is rotatably mounted on the mounting part 38. The first connecting bracket 311 and the second connecting bracket 312 are hinged, and a torsion spring 31 is fitted at the hinge. A sealing element 39 is provided inside the conduit 36. The outer wall of the piston tube 37 and the inner wall of the conduit 36 ​​form a sliding sealing fit through the sealing element 39. The mounting part 38 is provided with a finger hook 33, and the conduit 36 ​​is provided with a finger buckle 35. The end of the conduit 36 ​​away from the piston tube 37 is provided with a mating connector 361 that matches the mounting port 172.

[0023] The one-way valve assembly 13 includes a housing 131, a rubber cap 130, and a valve rubber 132. The housing 131 contains a duckbill-shaped valve rubber 132 and a rubber cap 130. The rubber cap 130 has an inlet that can seal with endoscopic surgical instruments. The valve rubber 132 has a slotted structure at its head. The head of the housing 131 has a locking head 133 that matches the mounting port 172. The mounting port 172 has a second latch 134 for fixing the locking head 133.

[0024] The specific sealing method of the one-way valve assembly 13 is shown in patent CN220505900U. The surgical instrument enters through the inlet of the cap and exits through the slotted structure of the duckbill-shaped valve. At this time, the cap wraps around the surgical instrument to seal it, while the slotted structure of the duckbill-shaped valve is open. This makes installation convenient and provides a good sealing effect.

[0025] Work process: Remove the one-way valve assembly 13 from the electronic endoscope 1 and install the manipulator 3 and the excision instrument 2 in sequence. The manipulator 3 is connected to the electronic endoscope 1 at one end and to the excision instrument 2 at the other end. The axial movement of the piston tube 37 and the catheter 36 drives the excision instrument 2 to reciprocate back and forth. The excision instrument 2 adjusts the front and rear positions of the electrocautery ring 21 and the fiber optic channel tube 22 by adjusting the forward and backward rotation of the nut to ensure that they do not interfere with each other.

[0026] This invention allows patients suffering from benign prostatic hyperplasia and kidney stones to undergo a single surgery: First, insert the laser fiber through the 25 channel of the fiber optic locker and lock it. Use the laser to peel off the prostatic hyperplasia tissue. When bleeding occurs, you can adjust the advance and retreat of the screw to quickly adjust the electrocautery mode for hemostasis to ensure a clear field of vision. Then, readjust to the laser mode to continue the surgery. At the same time, if the laser cannot completely peel off the prostatic hyperplasia tissue, the electrocautery mode can also be used to remove the hyperplasia residue.

[0027] After the prostate surgery is completed, the manipulator 3, along with the excision instrument 2, is removed from the electronic endoscope 1 and a one-way valve assembly 13 is inserted. The electronic ureteroscope 5 is inserted into the electronic endoscope 1 to enter the human body. The laser fiber is inserted through the instrument channel of the electronic ureteroscope 5. Under the visualization of the electronic endoscope 1, the electronic ureteroscope 5 can quickly penetrate into the ureter and reach the kidney, and break up the stones in the kidney, ureter, and bladder. At the same time, the stones that have been broken up in the kidney and ureter can be discharged into the bladder through the instrument channel of the electronic ureteroscope 5, which is connected to the suction platform.

[0028] After lithotripsy, the electronic ureteroscope 5 is removed, and the pulverizer 4 is inserted to pulverize and expel the dissected prostatic hyperplasia tissue. At the same time, the remaining stones in the bladder are suctioned out through the pulverizer 4.

[0029] This approach effectively reduces the surgical time caused by unexpected bleeding during laser enucleation by rapidly switching between the electrocautery ring and the laser fiber. It also solves the problem of uncontrollable surgical time when performing a single surgery on patients with both benign prostatic hyperplasia and kidney stones, and shortens the surgical time for combined surgeries. In addition, this method first drains the fragmented stones into the bladder and then removes them from the body by the pulverizer, which also reduces the time spent on repeated stone removal using only electronic ureteroscopy.

[0030] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. An endoscopic surgical system, characterized in that: The device includes an electronic endoscope (1) and endoscopic surgical instruments, the endoscopic surgical instruments including an enucleation instrument (2), an electronic ureteroscope (5) and a shredder (4), the electronic endoscope (1) including an outer sheath (11), a tube (12), a one-way valve assembly (13), an inner sheath (14), a handle (15), a plug assembly (16) and a mounting base (17), the outer sheath (11) is mounted on the mounting base (17), the inner sheath (14) is provided in the outer sheath (11), the tube (12) is fixed on the inner wall of the inner sheath (14), the head end of the tube (12) is provided with a lens part (121), and the handle (15) is provided on the side of the mounting base (17). The handle (15) is connected to a plug assembly (16). The inner sheath (14) contains a surgical channel (10). The inner diameter of the surgical channel (10) is adapted to the endoscopic surgical instrument, allowing the operating end of the endoscopic surgical instrument to pass smoothly through. The mounting base (17) has a working channel (171) connected to the surgical channel (10). The working channel (171) is coaxially arranged with the surgical channel (10). An installation port (172) is provided at one end of the working channel (171) away from the surgical channel (10), allowing the excision instrument (2) to be installed in conjunction with the installation port (172). The one-way valve assembly (13) and... The mounting port (172) is detachable, and the electronic ureteroscope (5) and the pulverizing blade (4) can be sealed and assembled with the one-way valve assembly (13). The excision instrument (2) includes an operator (3), a mounting connector (6), an infeed / outfeed nut (7), an electrocautery assembly, and a laser assembly. One end of the operator (3) is detachably mounted to the mounting port (172), and the other end is detachably mounted to the mounting connector (6). The operator (3) has an mounting channel (30) coaxially arranged with the surgical channel (10). The infeed / outfeed nut (7) has a fixing block (71) inside, and the fixing block (71) is connected to the mounting connector (6) through the positioning tube (70). The mounting connector (6) is provided with a first movable groove (61) for axial movement of the fiber optic channel tube (22) and a second movable groove (62) for axial movement of the power supply cutting rod (20). The head and tail ends of the advance and retract nut (7) are respectively connected to a first threaded cylinder (72) and a second threaded cylinder (73) coaxially arranged with the surgical channel (10). The threads of the first threaded cylinder (72) and the second threaded cylinder (73) are opposite. The electric cutting assembly is threadedly installed with the first threaded cylinder (72), and the laser assembly is threadedly installed with the second threaded cylinder (73). When the advance and retract nut (7) rotates, it can drive the electric cutting assembly and the laser assembly to move in opposite directions or in opposite directions along the axial direction.

2. The endoscopic surgical system as described in claim 1, characterized in that: The electro-cutting assembly includes an electro-cutting slider (26), electro-cutting rods (20), an electrode holder (23), and an electro-cutting ring (21). The electro-cutting slider (26) is threadedly installed with the first threaded cylinder (72). The electrode holder (23) has two electro-cutting rods (20) at its head end, and an electro-cutting ring (21) at the head end of each of the two electro-cutting rods (20). The tail end of the electrode holder (23) is connected to the electro-cutting slider (26). The positioning tube (70) passes through the electrode holder (23) and the electro-cutting slider (26). The laser assembly includes an optical fiber slider (27), an optical fiber channel tube (22), and a laser. The optical fiber slider (27) is threadedly installed with the second threaded cylinder (73). The tail end of the optical fiber slider (27) is provided with an optical fiber lock (25). The head end of the optical fiber lock (25) is provided with an optical fiber channel tube (22). The optical fiber channel tube (22) is provided with a laser optical fiber. The built-in section of the optical fiber channel tube (22) is movably located in the positioning tube (70). The protruding section of the optical fiber channel tube (22) is located between two electric cutting rods (20). The electric cutting rods (20) are connected to a positioning ring (28). The optical fiber channel tube (22) is movably located in the positioning ring (28).

3. The endoscopic surgical system as described in claim 2, characterized in that: The manipulator (3) includes a mounting part (38), a conduit (36), and a piston tube (37). One end of the piston tube (37) is slidably mounted in the conduit (36), and the other end is connected to the mounting part (38). The mounting part (38) has a mounting groove (381) that is adapted to the mounting connector (6), and the mounting part (38) is provided with a first latch (32) for locking the mounting connector (6). A first connecting bracket (311) is rotatably mounted on the conduit (36), and a second connecting bracket is rotatably mounted on the mounting part (38). (312), the first connecting frame (311) and the second connecting frame (312) are hinged and a torsion spring (31) is installed at the hinge. A sealing element (39) is provided inside the conduit (36). The outer wall of the piston tube (37) and the inner wall of the conduit (36) form a sliding sealing fit through the sealing element (39). A finger hook (33) is provided on the mounting part (38). A finger buckle (35) is provided on the conduit (36). A connector (361) matching the mounting port (172) is provided at one end of the conduit (36) away from the piston tube (37).

4. The endoscopic surgical system as described in claim 1, characterized in that: The one-way valve assembly (13) includes a housing (131), a cap (130), and a valve glue (132). The housing (131) contains a duckbill-shaped valve glue (132) and a cap (130). The cap (130) has an inlet that can seal with endoscopic surgical instruments. The valve glue (132) has a slit structure at its head. The housing (131) has a clip (133) that matches the mounting port (172). The mounting port (172) has a second latch (134) that fixes the clip (133).

5. The endoscopic surgical system as described in claim 1, characterized in that: The inner sheath (14) has a guide head (141) at its head end, which protrudes from the head end of the outer sheath (11). The lens part (121) has a structure with a large head end and a small rear end. An image sensor (142) is installed inside the head end of the lens part (121). A tip head (143) is installed on the head end face of the lens part (121), and a protective glass (144) is installed on the tip head (143). A set distance is reserved between the end face of the tip head (143) and the port of the guide head (141). The lens part (121) is located in the guide head (141). The inner sheath (14) and the outer sheath (11) are both made of stainless steel, and the guide head (141) is made of ceramic.

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