An endoscopic skull base dura mater delivery and glue application device

Abstract

The present invention discloses an endoscopic skull base dura mater delivery and glue coating device. The device includes a handle, an operating rod, a clamping claw assembly, a clamping claw control assembly and a glue guide tube. By turning the rotation adjustment gear and the swing adjustment hand wheel in the handle, the angle of the clamping claw assembly and the swing angle of the clamping claw assembly can be adjusted, so as to accurately adjust the position of the dura mater at the skull base surgical site. The maximum size of the clamping claw assembly can be adjusted by a threaded knob and a threaded rod, which can adapt to the delivery of dura maters of different specifications. Combined with the glue guide tube, medical glue is injected to seal the dura mater wound. The present invention has a compact structure and is easy to operate. It is suitable for skull base surgery in a narrow space, improves surgical accuracy, reduces surgical difficulty, and alleviates patient pain.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an endoscopic skull base dura mater delivery and glue coating device. Background Art

[0002] With the continuous improvement of science and technology, the use of the skull base dura mater has solved many medical problems. For example, the wound after surgical resection of tumors in the skull base area needs to be implanted with the skull base dura mater to reduce the risk of complications such as intracranial infection and meningitis. The implantation of the skull base dura mater needs to be delivered to the skull base through the nasal cavity, and the dura mater is fixed and the wound is sealed. However, since the skull base surgical instruments enter the skull base through the nasal cavity, the narrow space in the nasal cavity greatly limits the movement of the instruments, and the instruments are prone to mutual interference and blocking the field of vision. At present, there are few dura mater sealing devices suitable for skull base dura mater surgery. Patent CN110545875A discloses a dura mater sealing system, which includes an implant, a conveying device, an introduction device and a surgical sealant application device. The device can deliver the implant to the dura mater site and can seal the wound with a sealant, but the implant in the device can only advance along the outer needle direction with a fixed shape and angle, and the direction of the implant approaching the dura mater cannot be flexibly adjusted. The doctor must have rich operating experience to ensure the success of the operation. This virtually increases the difficulty of the operation. Therefore, the development of dura mater delivery and sealing devices that can flexibly adjust the orientation of the implant is of great significance for skull base surgery. Summary of the invention

[0003] In order to solve the above technical problems, improve the accuracy of skull base surgery, reduce the difficulty of surgery, and relieve the pain of patients, the present invention provides a dura mater delivery and glue coating device with a compact structure, adjustable angle, implantation and fixation of the dura mater, and one-time sealing of the wound.

[0004] The specific technical solutions of the present invention are as follows:

[0005] The first aspect of the present invention provides an endoscopic skull base dura mater delivery and glue coating device, which comprises a handle, an operating rod and a clamping mechanism connected in sequence. The clamping mechanism comprises a housing, a clamping claw assembly and a clamping claw control assembly.

[0006] One end of the clamping claw control assembly is connected to the clamping claw assembly, and the other end is connected to the operating rod.

[0007] The clamping claw assembly comprises a clamping claw moving part, a clamping claw fixing part, a first spring and a first bump. The front end of the clamping claw fixing part and the front end of the clamping claw moving part constitute a clamping area, and the clamping area is used to accommodate the dura mater of the skull base repair.

[0008] The clamping claw control assembly includes a bracket, a first central tube, a second spring, a first expansion block, a second expansion block, a contraction block, a fixing pin, a threaded knob and a threaded rod.

[0009] Furthermore, a slide groove is provided on the fixing part of the clamping claw, and the movable part of the clamping claw is installed in the slide groove and can slide along the slide groove track.

[0010] Furthermore, a first groove is provided in the middle of the clamping claw moving part, a first spring is provided in the first groove, one end of the first spring is connected to the clamping claw fixed part, and the other end is connected to the clamping claw moving part. A first protrusion is provided at the rear end of the clamping claw moving part, and when an external force acts on the first protrusion, the clamping claw moving part is driven to slide along the slide groove, the first spring is in a compressed state, and the clamping area becomes larger; when the external force disappears, the first spring gradually resets, driving the clamping claw moving part to slide in the opposite direction, and the clamping area is reduced.

[0011] Furthermore, the number of the clamping claw assemblies is 2 or more, such as 3 or 4.

[0012] The first central tube is located in the shell and connected to the shell through a connecting block. When the first central tube rotates, the connecting block drives the clamping mechanism to rotate synchronously. The first central tube sequentially passes through the bracket, the second expansion block, and the first expansion block.

[0013] Furthermore, the bracket includes a hollow cylinder and a plurality of first convex strips arranged on the hollow cylinder, the first convex strips are arranged around the outer side of the hollow cylinder, the first convex strips are fixed on the shell, and a pin is arranged between adjacent first convex strips and close to the hollow cylinder.

[0014] The rear end of the clamping claw fixing part is fixed between adjacent first convex strips through a pin shaft and arranged around the hollow cylinder, so that the clamping claw assembly can rotate around the pin shaft as the axis to achieve the opening or closing of the clamping claw assembly.

[0015] Furthermore, the first expansion block is sleeved on the front end of the first center tube, and a plurality of first expansion parts and second expansion parts are arranged on the first expansion block, and the first expansion parts and the second expansion parts are arranged at intervals, and the first expansion part is used to push the first protrusion of the clamping claw moving part, and the second expansion part is connected to one end of the second spring, and the second expansion part is used to push the second spring; a plurality of third expansion parts and fourth expansion parts are arranged on the second expansion block, and the third expansion parts and the fourth expansion parts are arranged at intervals, and the third expansion part is used to push the clamping claw assembly; the other end of the second spring is connected to the fourth expansion part.

[0016] The contraction block includes a plurality of contraction parts, wherein the contraction parts are located between adjacent first convex strips, and the second expansion block and the contraction block are fixedly connected by a connecting pin. A plurality of holes are arranged along the circumference of the hollow cylinder, and the connecting pin passes through the holes on the hollow cylinder.

[0017] Furthermore, the front end of the contraction portion is in the shape of an inclined surface, and the lower bottom surface of the rear end of the clamping claw fixing portion is in the shape of an inclined surface and is adapted to the inclined surface of the front end of the contraction portion.

[0018] Furthermore, the front end of the threaded rod is "U"-shaped, located between two adjacent first convex strips, and located at the rear end of the contraction portion, for limiting the continued movement of the contraction block; a pointer is provided on one side of the "U"-shaped structure, and the pointer passes through the outer shell, and a scale line is provided on the outer shell, which can be used to indicate the maximum size that can be clamped by the clamping claw assembly; the rear end of the threaded rod is threadedly connected to a threaded knob, and the threaded knob is installed on the outer shell, and the threaded rod is driven to move by rotating the threaded knob.

[0019] The fixing pin is arranged on the first central tube and installed at the rear end of the contraction portion, and the fixing pin and the "U"-shaped structure of the threaded rod are not on the same plane.

[0020] Furthermore, one or more fixing pins may be provided.

[0021] Turning the threaded knob drives the threaded rod to move so that the pointer is located at a suitable position; when the first central tube moves backward under the action of external force, it drives the first expansion block to move synchronously, and the second expansion part of the first expansion block drives the second expansion block and the contraction block to move through the second spring, and the third expansion part of the second expansion block pushes the clamping claw assembly to open, and at the same time, the lower bottom surface of the clamping claw fixed part moves downward on the inclined surface of the front end of the contraction part; when the rear end of the contraction part contacts the "U"-shaped structure of the front end of the threaded rod, the second expansion block and the contraction block stop moving, and the clamping claw assembly opens to the maximum angle; at this time, the first central tube continues to move backward, and continues to drive the first expansion block to move, and because the second expansion block and the contraction block stop moving, the second spring is compressed, and at the same time, the first expansion part of the first expansion block pushes the first protrusion of the clamping claw moving part, thereby driving the clamping claw moving part to slide along the slide groove, and the first spring is in a compressed state, so that the clamping area becomes larger, which can be used to clamp the dura mater of a certain size.

[0022] When the first center tube moves forward under the action of external force, it drives the first expansion block to move synchronously, and the second spring gradually resets. The first expansion part of the first expansion block will move away from the first protrusion of the clamping claw moving part. The clamping claw moving part slides reversely along the slide groove under the reset action of the first spring, and the clamping area is reduced; the first center tube continues to move forward, the fixing pin contacts and pushes the contraction part to move forward, and the lower bottom surface of the clamping claw fixing part moves upward on the inclined surface at the front end of the contraction part, and the clamping claw assembly is closed.

[0023] The operating rod includes an outer tube, a second center tube, a third center tube and a swing module. The swing module includes an eccentric rod, a joint and a swing outer tube. The first center tube, the second center tube and the third center tube are connected in sequence and located at the central axis; the second center tube is located inside the swing outer tube, and the second center tube is a hose with a certain rigidity, such as a plastic steel wire hose, which can be transmitted and swung; the third center tube and the eccentric rod are located inside the outer tube.

[0024] One end of the joint is pin-connected with the eccentric rod, and the other end is pin-connected with the swing outer tube. The other end of the eccentric rod is a rack structure; one end of the swing outer tube is connected to the outer tube through a connecting pin, and the other end is connected to the outer shell.

[0025] When the eccentric rod moves, the swinging outer tube is driven to swing through the joint, and then the clamping mechanism is driven to swing, so that the position of the clamping mechanism is adjusted within a larger range, thereby achieving position adjustment of the dura mater patch within the entire skull.

[0026] The handle comprises a rotary adjustment hand wheel, a swing adjustment hand wheel, a swing adjustment gear, a wrench, a wrench reset spring and a handle shell.

[0027] A hole matching the third central tube is provided at the center of the rotary adjustment hand wheel, and the rotary adjustment hand wheel is sleeved on the third central tube. When the rotary adjustment hand wheel is rotated, the third central tube is driven to rotate synchronously, thereby driving the second central tube and the first central tube to rotate, and finally driving the clamping mechanism to rotate, so that the position and angle of the clamping mechanism entering the skull can be adjusted, thereby improving the accuracy of the operation.

[0028] The swing adjustment hand wheel and the swing adjustment gear are coaxially connected, and the swing adjustment gear is meshed with the rack of the eccentric rod. By rotating the swing adjustment hand wheel, the swing adjustment gear is driven to rotate synchronously. Through the meshing action of the swing adjustment gear and the rack, the eccentric rod moves, and then the swing outer tube is driven to swing through the joint, and finally the clamping mechanism is driven to swing.

[0029] The wrench includes an actuating end and a clamping end, the top of the clamping end is connected to the handle housing pin, the middle of the clamping end is snap-connected to the third center tube behind the rotating adjustment hand wheel, the third center tube is provided with a second protrusion behind the clamping end, and the second protrusion abuts against the clamping end. The wrench reset spring is sleeved on the tail of the third center tube, one end abuts against the second protrusion, and the other end is connected to the handle housing. When the actuating end of the wrench is pulled, the clamping end rotates around the pin, pushing the second protrusion on the third center tube to move backward, driving the third center tube to move synchronously, and compressing the wrench reset spring.

[0030] Furthermore, the handle also includes a wrench limit block, a serration structure, a limit button and a limit button reset spring.

[0031] The serration structure is arranged in the middle part of the wrench; further, the serration structure is integrally formed with the wrench.

[0032] The limit button is in a "T" shape, one end of which can be engaged with the sawtooth structure, and the other end is connected to one end of the limit button reset spring, and the middle part of the limit button is fixed to the handle housing through a shaft. The handle end of the limit button can rotate around the shaft.

[0033] Furthermore, the wrench limit block is used to limit the handle end of the limit button.

[0034] Furthermore, the other end of the limit button return spring is fixed to the handle housing.

[0035] When the pulling end of the wrench is pulled, the clamping end of the wrench pushes the second protrusion to move backward, the compression wrench reset spring drives the third center tube to move synchronously, thereby driving the second center tube and the first center tube to move backward, so that the clamping claw assembly opens; continue to pull the pulling end of the wrench to make the first center tube continue to move backward, so that the clamping area becomes larger, which can be used to clamp the dura mater of a certain size.

[0036] When the pulling end of the wrench is slowly released, the wrench reset spring slowly resets, pushing the second protrusion to move forward, driving the third center tube to move synchronously, thereby driving the second center tube and the first center tube to move forward, reducing the clamping area; when the wrench reset spring gradually returns to its original state, the first center tube continues to move forward, and the clamping claw assembly closes, completing one pulling operation of the wrench.

[0037] Furthermore, a buffer spring may be provided on the handle housing to buffer the force applied when the wrench is pulled.

[0038] Furthermore, the device also includes a rubber guide tube, the rubber injection port of the rubber guide tube is arranged on the handle, and the rubber outlet of the rubber guide tube is arranged at the front end of the clamping claw assembly.

[0039] Furthermore, the glue guide tube passes through the third central tube, the second central tube, and the first central tube in sequence; the sealant is injected into the glue guide tube from the glue injection port, and finally applied to the edge where the dura mater contacts the skull through the glue outlet, so as to further fix the dura mater.

[0040] Beneficial effects of the present invention:

[0041] 1. The present invention not only controls the opening and closing of the clamping claw assembly through the clamping claw control assembly, but also adjusts the sliding of the clamping claw moving part to form a clamping area, thereby realizing the folding and delivery of the dura mater through the narrow nasal cavity. In addition, through the setting of the threaded knob and the threaded rod, the maximum size of the dura mater that can be clamped by the clamping claw assembly can be adjusted, thereby realizing the delivery of dura maters of different sizes and improving the adaptability of the device.

[0042] 2. The present invention provides a rotating adjustment hand wheel structure on the third central tube to cooperate with the transmission, and the rotation of the rotating adjustment hand wheel can drive the entire clamping mechanism to rotate 360 ​​degrees without restriction, and an eccentric rod is provided to drive the clamping mechanism to swing through a joint, so that the operator can adjust the position and angle of the clamping mechanism entering the dura mater. It has more degrees of freedom and flexibility than traditional instruments, which is conducive to improving the convenience of operation and the accuracy of surgery.

[0043] 3. The present invention is provided with a rubber guide tube which passes through the third central tube, the second central tube, and the first central tube in sequence and is fixed at the front end of the clamping claw fixing part, so that the glue can be applied to the edge where the dura mater contacts the skull, so as to further fix the dura mater, realize one-time wound closure, reduce the difficulty of surgery, and help alleviate the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Shown is a schematic diagram of the overall structure of the dura mater delivery and glue application device;

[0045] Figure 2 Shown is a detail view of the clamping jaw assembly;

[0046] Figure 3 Shown is a detailed view of the gripper jaw control assembly;

[0047] Figure 4 Shown is a detailed view of the bracket;

[0048] Figure 5 Shown is an enlarged view of the gripper jaw control assembly;

[0049] Figure 6 Shown is a detailed view of the connection between the first center tube and the outer shell;

[0050] Figure 7 Shown is a cross-sectional view of the connection between the operating lever and the clamping claw control assembly;

[0051] Figure 8 The above is a detailed view of the handle.

[0052] The components in the figure are marked as follows: 101-dura mater, 102-clamping mechanism, 103-operating rod, 104-handle, 201-housing, 202-clamping claw moving part, 203-clamping claw fixing part, 204-first spring, 205-first protrusion, 206-first groove, 207-bracket, 208-first central tube, 209-second spring, 210-first expansion block, 211-second expansion block, 212-contraction block, 213-fixing pin, 214-threaded knob, 215-threaded rod, 216-hollow cylinder, 217-first protrusion, 218-first expansion part, 219-second expansion part, 220-third expansion part, 221-fourth expansion part, 222-contraction part, 223-pointer, 224-connecting block, 301-outer tube, 302-second center tube, 303-third center tube, 304-eccentric rod, 305-joint, 306-swinging outer tube, 401-rotation adjustment hand wheel, 402-swinging adjustment hand wheel, 403-swinging adjustment gear, 404-wrench, 405-wrench reset spring, 406-handle housing, 407-wrench end, 408-clamping end, 409-second protrusion, 410-wrench limit block, 411-serrated structure, 412-limit button, 413-limit button reset spring, 414-buffer spring, 501-rubber guide tube. DETAILED DESCRIPTION

[0053] The technical scheme of the present invention is described clearly and completely below in conjunction with the embodiments and drawings. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0054] It should be noted that the directions indicated by “front” and “back” in the abstract, claims and description of the application documents are relative to Figure 1 In general, the term "front" refers to the direction from the handle to the clamping jaw, and the term "rear" refers to the direction from the clamping jaw to the handle.

[0055] Figure 1-8 An endoscopic skull base dura mater delivery and glue coating device is shown, which includes a handle 104, an operating rod 103 and a clamping mechanism 102 connected in sequence. The clamping mechanism 102 includes a housing 201, a clamping claw assembly and a clamping claw control assembly, and there are 4 clamping claw assemblies. One end of the clamping claw control assembly is connected to the clamping claw assembly, and the other end is connected to the operating rod 103.

[0056] The clamping claw assembly includes a clamping claw moving part 202, a clamping claw fixing part 203, a first spring 204 and a first protrusion 205. The front end of the clamping claw fixing part 203 and the front end of the clamping claw moving part 202 constitute a clamping area, and the clamping area is used to accommodate the dura mater 101 for repairing the skull base. A slide groove is provided on the clamping claw fixing part 203, and the clamping claw moving part is installed in the slide groove and can slide along the slide groove track. A first groove 206 is provided in the middle of the clamping claw moving part, and a first spring 204 is provided in the first groove 206. The rear end of the first spring 204 is connected to the clamping claw fixing part 203, and the front end is connected to the clamping claw moving part 202. A first protrusion 205 is provided at the rear end of the clamping claw moving part 202. When an external force acts on the first protrusion 205, the clamping claw moving part 202 is driven to slide along the slide groove, the first spring 204 is in a compressed state, and the clamping area becomes larger; when the external force disappears, the first spring 204 is reset, driving the clamping claw moving part 202 to slide in the opposite direction, and the clamping area is reduced.

[0057] The clamping claw control assembly includes a bracket 207 , a first central tube 208 , a second spring 209 , a first expansion block 210 , a second expansion block 211 , a contraction block 212 , a fixing pin 213 , a threaded knob 214 and a threaded rod 215 .

[0058] The first central tube 208 is located in the housing 201 and is connected to the housing 201 through the connecting block 224. When the first central tube 208 rotates, the clamping mechanism is driven to rotate synchronously through the connecting block 224. The first central tube 208 passes through the connecting block 224, the bracket 207, the second expansion block 211, and the first expansion block 210 in sequence.

[0059] The bracket 207 includes a hollow cylinder 216 and four first ridges 217 arranged on the hollow cylinder 216. The first ridges 217 are evenly arranged around the outer side of the hollow cylinder 216. The first ridges 217 are fixed to the housing 201. A pin is arranged between adjacent first ridges 217 and near the hollow cylinder 216. The rear end of the clamping claw fixing portion 203 is fixed between adjacent first ridges 217 by a pin and evenly arranged around the hollow cylinder 216, so that the clamping claw assembly can rotate around the pin to achieve the opening or closing of the clamping claw assembly.

[0060] The first expansion block 210 is sleeved on the front end of the first central tube 208, and is provided with four first expansion parts 218 and four second expansion parts 219, and the first expansion parts 218 and the second expansion parts 219 are arranged at intervals. The first expansion part 218 is used to push the first protrusion 205 of the clamping claw moving part 202, so as to open the clamping area formed by the front end of the clamping claw fixed part and the front end of the clamping claw moving part. The second expansion part 219 is used to push the second spring 209.

[0061] The second expansion block 211 is provided with four third expansion parts 220 and four fourth expansion parts 221, and the third expansion parts 220 and the fourth expansion parts 221 are arranged at intervals. When the third expansion part 220 moves backward, it can push the clamping claw assembly to control the opening or closing of the clamping claw assembly. The other end of the second spring 209 is connected to the fourth expansion part 221.

[0062] The contraction block 212 includes four contraction parts 222, and the contraction parts 222 are located between adjacent first convex strips 217. The second expansion block 211 and the contraction block 212 are fixedly connected by a connecting pin, and a plurality of holes are arranged along the circumference of the hollow cylinder 216, and the connecting pin passes through the holes on the hollow cylinder 216. The front end of the contraction part 222 is in the shape of an inclined surface, and the lower bottom surface of the rear end of the clamping claw fixing part is in the shape of an inclined surface, and is adapted to the inclined surface of the front end of the contraction part 222.

[0063] The front end of the threaded rod 215 is in a "U" shape, located between two adjacent first ridges 217 and at the rear end of the contraction portion 222, and is used to limit the continued movement of the contraction block 212. A pointer 223 is set on one side of the "U" structure, and the pointer 223 passes through the housing 201. The housing is provided with a scale line, which can be used to indicate the maximum size that the clamping claw assembly can clamp. The rear end of the threaded rod 215 is threadedly connected to the threaded knob 214, and the threaded knob 214 is installed on the housing 201. By turning the threaded knob 214, the threaded rod 215 is driven to move.

[0064] Two fixing pins 213 are symmetrically arranged on the first central tube 208 and installed at the rear end of the contraction portion 222 . The fixing pins 213 and the “U”-shaped structure of the threaded rod 215 are not on the same plane.

[0065] The operating rod 103 includes an outer tube 301, a second central tube 302, a third central tube 303 and a swing module. The swing module includes an eccentric rod 304, a joint 305, and a swing outer tube 306. The first central tube 208, the second central tube 302, and the third central tube 303 are sequentially connected and located at the central axis. The second central tube 302 is a hose with a certain hardness and is located inside the swing outer tube 306, which can be transmitted and swung. The third central tube 303 and the eccentric rod 304 are located inside the outer tube.

[0066] One end of the joint 305 is pin-connected with the eccentric rod 304, and the other end is pin-connected with the swing outer tube 306. The other end of the eccentric rod 304 is a rack structure. One end of the swing outer tube 306 is connected to the outer tube 301 through a connecting pin, and the other end is connected to the housing 201.

[0067] When the eccentric rod 304 moves, the swinging outer tube 306 is driven to swing through the joint 305, and then the clamping mechanism is driven to swing, so as to adjust the position of the clamping structure within a larger range, and realize the delivery of the dura mater 101 within the entire skull.

[0068] The handle 104 includes a rotation adjustment hand wheel 401, a swing adjustment hand wheel 402, a swing adjustment gear 403, a wrench 404, a wrench return spring 405, a handle housing 406, a wrench limit block 410, a serration structure 411, a limit button 412, a limit button return spring 413 and a buffer spring 414.

[0069] A hole matching the third central tube 303 is provided at the center of the rotation adjustment hand wheel 401, and the rotation adjustment hand wheel 401 is sleeved on the third central tube 303. When the rotation adjustment hand wheel 401 is rotated, the third central tube 303 is driven to rotate synchronously, thereby driving the second central tube 302 and the first central tube 208 to rotate, and finally driving the clamping mechanism to rotate, so that the position and angle of the clamping mechanism entering the skull can be adjusted to improve the accuracy of the operation.

[0070] The swing adjustment hand wheel 402 and the swing adjustment gear 403 are coaxially connected, and the swing adjustment gear 403 is meshed with the rack of the eccentric rod 304. By rotating the swing adjustment hand wheel 402, the swing adjustment gear 403 is driven to rotate synchronously, and the eccentric rod 304 is moved through the meshing action of the swing adjustment gear 403 and the rack, and then the swing outer tube 306 is driven to swing through the joint 305, and finally the clamping mechanism is driven to swing.

[0071] The wrench 404 includes an actuating end 407 and a clamping end 408. The top of the clamping end 408 is connected to the handle housing 406 by a pin, and the middle of the clamping end 408 is connected to the third central tube 303 behind the rotating adjustment hand wheel 401. The third central tube 303 is provided with a second protrusion 409 behind the clamping end 408, and the second protrusion 409 abuts against the clamping end 408. The wrench reset spring 405 is sleeved on the tail of the third central tube 303, one end of which abuts against the second protrusion 409, and the other end is connected to the handle housing 406. When the actuating end 407 of the wrench 404 is actuated, the clamping end 408 rotates around the pin, pushing the second protrusion 409 on the third central tube 303 to move backward, driving the third central tube 303 to move synchronously, and compressing the wrench reset spring 405.

[0072] The serration structure 411 is arranged in the middle of the wrench 404; the serration structure 411 is integrally formed with the wrench 404. The limit button 412 is in a "T" shape, one end of which can be engaged with the serration structure 411, and the other end is connected to one end of the limit button reset spring 413. The middle part of the limit button 412 is fixed to the handle housing 406 through an axis. The handle end of the limit button 412 can rotate around the axis. The wrench limit block 410 is used to limit the handle end of the limit button 412. The other end of the limit button reset spring 413 is fixed to the handle housing 406. The buffer spring 414 is used to buffer the force when the wrench is pulled.

[0073] The threaded knob 214 is turned to drive the threaded rod 215 to move, so that the pointer 223 is located at a suitable position; the pulling end 407 of the wrench 404 is pulled, and the clamping end 408 of the wrench pushes the second protrusion 409 to move backward, compressing the wrench reset spring 405, and driving the third center tube 303 to move synchronously, thereby driving the second center tube 302 and the first center tube 208 to move backward, driving the first expansion block 210 to move synchronously, and the second expansion portion 219 of the first expansion block 210 drives the second expansion block 211 and the contraction block 212 to move through the second spring 209, and the third expansion portion 220 of the second expansion block 211 pushes the clamping claw assembly to open, and at the same time, the lower bottom surface of the clamping claw fixing portion 203 is at the contraction portion 222 When the rear end of the contraction portion 222 contacts the "U"-shaped structure at the front end of the threaded rod 215, the second expansion block 211 and the contraction block 212 stop moving, and the clamping claw assembly opens to the maximum angle; at this time, the first center tube 208 continues to move backward, driving the first expansion block 210 to move, and since the second expansion block 211 and the contraction block 212 stop moving, the second spring 209 is compressed, and at the same time, the first expansion portion 218 of the first expansion block 210 gradually contacts and pushes the first protrusion 205 of the clamping claw moving portion 202, thereby driving the clamping claw moving portion 202 to slide along the slide groove, and the first spring 204 is in a compressed state, so that the clamping area becomes larger, which can be used to clamp the dura mater of a certain size.

[0074] When the wrench 404 is slowly released from the pull end 407, the wrench reset spring 405 is slowly reset, pushing the second protrusion 409 forward, driving the third center tube 303 to move synchronously, thereby driving the second center tube 302 and the first center 208 to move forward, driving the first expansion block 210 to move synchronously, and the second spring 209 is gradually reset, and the first expansion portion 218 of the first expansion block 210 will move away from the first protrusion 205 of the clamping claw moving portion 202. The clamping claw moving portion 202 slides in the opposite direction along the slide groove under the reset action of the first spring 204, and the clamping area is reduced. The first center tube 208 continues to move forward, and the fixing pin 213 contacts and pushes the contraction portion 222 to move forward, thereby pushing the lower bottom surface of the clamping claw fixing portion 203 to move upward on the inclined surface of the front end of the contraction portion 222, and the clamping claw assembly is closed.

[0075] The device also includes a glue guide tube 501, the glue injection port of the glue guide tube 501 is set on the handle 104, and the glue outlet of the glue guide tube is set at the front end of the clamping claw assembly. The glue guide tube 501 passes through the third center tube 303, the second center tube 302, and the first center tube 208 in sequence. The sealant is injected into the glue guide tube 501 from the glue injection port and finally applied to the edge of the dura mater 101 that contacts the skull through the glue outlet to further fix the dura mater 101.

[0076] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An endoscopic skull base dura mater delivery and glue application device, characterized in that: It includes a handle, an operating rod and a clamping mechanism connected in sequence; The clamping mechanism comprises a housing, a clamping claw assembly and a clamping claw control assembly, one end of the clamping claw control assembly is connected to the clamping claw assembly, and the other end is connected to the operating rod; The clamping claw assembly includes a clamping claw moving part, a clamping claw fixing part, a first spring and a first protrusion; The clamping claw fixing part is provided with a slide groove, and the clamping claw moving part is installed in the slide groove; the middle part of the clamping claw moving part is provided with a first groove, and the first spring is provided in the first groove; the rear end of the clamping claw moving part is provided with the first protrusion; The clamping claw control assembly includes a bracket, a first central tube, a second spring, a first expansion block, a second expansion block, a contraction block, a fixing pin, a threaded knob and a threaded rod; The first center tube is located in the shell and connected to the shell through a connecting block. The first center tube passes through the bracket, the second expansion block, and the first expansion block in sequence. The bracket includes a hollow cylinder and a plurality of first convex strips arranged on the hollow cylinder. The rear end of the clamping claw fixing part is fixed between adjacent first convex strips through a pin shaft and arranged around the hollow cylinder. The first expansion block is sleeved on the front end of the first center tube. The contraction block includes a plurality of contraction parts, and the contraction parts are located between adjacent first convex strips. The second expansion block and the contraction block are fixedly connected by a connecting pin. The operating rod comprises an outer tube, a second central tube, a third central tube and a swing module; the first central tube, the second central tube and the third central tube are sequentially connected and located at the central axis of the operating rod.

2. The endoscopic skull base dura mater delivery and glue coating device according to claim 1, characterized in that: One end of the first spring is connected to the clamping claw fixing portion, and the other end is connected to the clamping claw moving portion.

3. The endoscopic skull base dura mater delivery and glue coating device according to claim 1, characterized in that: The number of the clamping claw assemblies is 2 or more.

4. The endoscopic skull base dura mater delivery and glue coating device according to claim 1, characterized in that: The first convex strips are arranged around the outer side of the hollow cylinder, the first convex strips are fixed on the shell, and the pin shaft is arranged between adjacent first convex strips and close to the hollow cylinder.

5. The endoscopic skull base dura mater delivery and glue coating device according to claim 1, characterized in that: A plurality of first expansion parts and a second expansion part are arranged on the first expansion block, the first expansion parts and the second expansion parts are arranged at intervals, and the second expansion part is connected to one end of the second spring; a plurality of third expansion parts and a fourth expansion part are arranged on the second expansion block, the third expansion parts and the fourth expansion parts are arranged at intervals; the other end of the second spring is connected to the fourth expansion part.

6. The endoscopic skull base dura mater delivery and glue coating device according to claim 1, characterized in that: A plurality of holes are arranged along the circumference of the hollow cylinder, and the connecting pin passes through the holes on the hollow cylinder.

7. The endoscopic skull base dura mater delivery and glue coating device according to claim 1, characterized in that: The front end of the contraction portion is in the shape of an inclined surface, and the lower bottom surface of the rear end of the clamping claw fixing portion is in the shape of an inclined surface and is matched with the inclined surface of the front end of the contraction portion.

8. The endoscopic skull base dura mater delivery and glue coating device according to claim 1, characterized in that: The front end of the threaded rod is "U"-shaped, located between two adjacent first convex strips, and located at the rear end of the contraction portion. A pointer is set on one side of the "U"-shaped structure, and the pointer passes through the shell. The shell is provided with scale lines, and the rear end of the threaded rod is threadedly connected to the threaded knob.

9. The endoscopic skull base dura mater delivery and glue coating device according to claim 8, characterized in that: The fixing pin is arranged on the first central tube and installed at the rear end of the contraction portion, and the fixing pin and the "U"-shaped structure of the threaded rod are not on the same plane.

10. The endoscopic skull base dura mater delivery and glue coating device according to claim 1, characterized in that: The swing module comprises an eccentric rod, a joint and a swing outer tube.

11. The endoscopic skull base dura mater delivery and glue coating device according to claim 10, characterized in that: The third central tube and the eccentric rod are located inside the outer tube; the second central tube is located inside the swing outer tube, and the second central tube is a rigid hose.

12. The endoscopic skull base dura mater delivery and glue coating device according to claim 10, characterized in that: One end of the joint is pin-connected with the eccentric rod, and the other end is pin-connected with the swing outer tube. The other end of the eccentric rod is a rack structure.

13. The endoscopic skull base dura mater delivery and glue coating device according to claim 10, characterized in that: One end of the swing outer tube is connected to the outer tube via a connecting pin, and the other end is connected to the outer shell.

14. The endoscopic skull base dura mater delivery and glue coating device according to claim 12, characterized in that: The handle comprises a rotary adjustment hand wheel, a swing adjustment hand wheel, a swing adjustment gear, a wrench, a wrench reset spring and a handle shell.

15. The endoscopic skull base dura mater delivery and glue coating device according to claim 14, characterized in that: A hole matched with the third center tube is opened at the center of the rotation adjustment hand wheel, and the rotation adjustment hand wheel is sleeved on the third center tube.

16. The endoscopic skull base dura mater delivery and glue coating device according to claim 14, characterized in that: The swing adjustment hand wheel and the swing adjustment gear are coaxially connected, and the swing adjustment gear is meshed with the rack of the eccentric rod.

17. The endoscopic skull base dura mater delivery and glue coating device according to claim 14, characterized in that: The wrench comprises a wrench end and a clamping end, the top of the clamping end is connected to the handle housing pin, and the middle of the clamping end is snap-connected to the third center tube behind the rotation adjustment hand wheel.

18. The endoscopic skull base dura mater delivery and glue coating device according to claim 17, characterized in that: A second protrusion is arranged on the third central tube behind the clamping end, and the second protrusion abuts against the clamping end.

19. The endoscopic skull base dura mater delivery and glue coating device according to claim 18, characterized in that: The wrench reset spring is sleeved on the tail of the third central tube, one end of the wrench reset spring is in contact with the second protrusion, and the other end is connected to the handle housing.

20. The endoscopic skull base dura mater delivery and glue coating device according to claim 14, characterized in that: The handle also includes a wrench limit block, a serration structure, a limit button and a limit button reset spring.

21. The endoscopic skull base dura mater delivery and glue coating device according to claim 20, characterized in that: The serration structure is arranged at the middle part of the wrench.

22. The endoscopic skull base dura mater delivery and glue coating device according to claim 20, characterized in that: The limit button is in a "T" shape, one end of which is engaged with the serrated structure, and the other end is connected to one end of the limit button reset spring. The middle part of the limit button is fixed to the handle housing through an axis.

23. The endoscopic skull base dura mater delivery and glue coating device according to claim 20, characterized in that: The wrench limiting block is arranged on the handle housing and is used to limit the handle end of the limiting button.

24. The endoscopic skull base dura mater delivery and glue coating device according to claim 22, characterized in that: The other end of the limit button reset spring is fixed to the handle housing.

25. The endoscopic skull base dura mater delivery and glue coating device according to claim 14, characterized in that: A buffer spring may also be arranged on the handle housing.

26. The endoscopic skull base dura mater delivery and glue coating device according to any one of claims 1 to 25, characterized in that: The device also includes a glue guide tube, a glue injection port of the glue guide tube is arranged on the handle, and a glue outlet of the glue guide tube is arranged at the front end of the clamping claw assembly.

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