A transnasal endoscopic cranial base dura suture device

Abstract

A kind of intranasal endoscopic cranial base dura mater suturing device, including shell, shell is tubular, the front end of shell is provided with suture head, suture head includes two rotating arms, the middle part of two rotating arms is hinged with shell by first rotation shaft, elastic member is arranged between the first rotation shaft of two rotating arms, elastic member is biased to the direction of mutual separation with the front end of two rotating arms, the rear end of shell is provided with driving device, driving device is connected with the rear end of two rotating arms by transmission mechanism.The present application provides a kind of intranasal endoscopic cranial base dura mater suturing device, similar to intranasal endoscope, can be with endoscope with same approach through nasal cavity into cranial base operation, mechanical small suture head end is deeply into cranial base through nose, using suture head, clamping structure, suture nail pushing structure combination degradable biological material suture nail, realize the close suture operation of dura mater in the narrow operation space of cranial base, not only lower operation requirement, but also can guarantee suture effect.

Description

Technical Field

[0001] This invention relates to human daily necessities, and more particularly to medical devices, especially a transnasal endoscopic skull base dura mater suture device. Background Technology

[0002] Endoscopic transnasal surgery in neurosurgery is a relatively minimally invasive procedure for skull base lesions. However, like all intracranial surgeries, it still requires opening the dura mater at the skull base to access the intracranial cavity. Therefore, there is a risk of postoperative complications such as dural cerebrospinal fluid leakage, potentially leading to serious consequences like intracranial infection. Currently, due to the extremely limited surgical space, dural suturing is generally not performed in endoscopic transnasal surgery. If dural repair is necessary, artificial dural materials and free nasal septum mucosal flaps are typically used for applicator repair. Even when suturing is performed, a special knotting method is used to gradually guide the suture into the skull base from outside the nose, making it difficult to guarantee a tight suture. Therefore, current endoscopic skull base dural repair and suturing techniques suffer from poor repair results and require highly skilled operators. Patent document (CN212118209U) regarding a deep dura mater suturing tool provides a hook-and-pull suture device that facilitates suturing operations. The surgeon needs to use this tool to tie knots, but it is still a manual suturing technique, which is relatively complicated and cannot achieve the desired repair effect. Summary of the Invention

[0003] The purpose of this invention is to provide a transnasal endoscopic skull base dura mater suture device, which aims to solve the technical problems of poor repair effect and high operation requirements in the existing endoscopic skull base dura mater repair and suturing operation.

[0004] The present invention provides a transnasal endoscopic skull base dura mater suture device, comprising a housing, the housing being tubular, a suture head being provided at the front end of the housing, the suture head comprising two rotating arms, the middle of the two rotating arms being hinged to the housing via a first rotating shaft, an elastic element being provided between the two rotating arms and the first rotating shaft, the elastic element biasing the front ends of the two rotating arms in a direction away from each other, and a driving device being provided at the rear end of the housing, the driving device being connected to the rear ends of the two rotating arms via a transmission mechanism; Each of the two rotating arms is provided with a suture pin clamping groove. The suture pin clamping groove is rectangular and its length direction is parallel to the length direction of the rotating arm. The suture pin clamping groove passes through the rotating arm and divides the rotating arm into two support arms in the width direction. Each of the two rotating arms is provided with at least three locking structures at intervals along the length direction of the rotating arm. Each locking structure includes two symmetrically arranged buckles. The two buckles are respectively set on the two support arms. Each of the two buckles includes a clamping block, a wedge block, and a lever. The fulcrum of the lever is hinged to the support arm through a second rotating shaft. The front end of the lever is hinged to the clamping block through a third rotating shaft. The rear end of the lever is hinged to the wedge block through a fourth rotating shaft. A sliding pair parallel to the axial direction of the first rotating shaft is provided between the clamping block and the third rotating shaft, and between the wedge block and the fourth rotating shaft. A second spring support is fixedly installed in the housing behind the rotating arm, and a second spring is installed on the front side of the second spring support.

[0005] Furthermore, the drive device includes two operating arms, the middle of which are hinged by a fifth pivot. The front end of each of the two operating arms is connected to one end of a guide wire, and the other end of each guide wire passes around a first guide wheel, a second guide wheel, and a third guide wheel before being connected to a rotating arm. The first guide wheel, the second guide wheel, and the third guide wheel are disposed on the inner wall of the housing.

[0006] Furthermore, a first spring support is fixedly provided on the side of the wedge block away from the suture staple clamping groove on the support arm, and a first spring is provided between the wedge block and the first spring support. The first spring biases the wedge block toward one side of the suture staple clamping groove.

[0007] Furthermore, each of the locking structures is respectively set in a mounting groove on the side of the rotating arm.

[0008] Compared with existing technologies, the advantages of this invention are positive and significant. This invention provides a transnasal endoscopic skull base dura mater suture device, similar in shape to a transnasal endoscope. It can be used to access the skull base via the nasal cavity using the same approach as the endoscope. The mechanized, fine suture tip is inserted into the skull base through the nose. Utilizing the suture tip, locking structure, and suture pusher structure combined with biodegradable biomaterial sutures, a tight suturing operation of the dura mater can be achieved within the confined operating space of the skull base. This not only reduces operational requirements but also ensures suturing effectiveness. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a transnasal endoscopic skull base dura mater suture device according to the present invention.

[0010] Figure 2 This is a schematic diagram of the suture head and drive device in the open state of a transnasal endoscopic skull base dura mater according to the present invention.

[0011] Figure 3 This is a schematic diagram of the closed state of the suture head and drive device in a transnasal endoscopic skull base dura mater according to the present invention.

[0012] Figure 4 This is a side view of the first suture staple in the open state when using a transnasal endoscopic skull base dura mater of the present invention.

[0013] Figure 5 This is a side view of the first suture in the closed state when using a transnasal endoscopic skull base dura mater of the present invention.

[0014] Figure 6 This is a frontal view of the first suture staple being clamped by a locking structure during use of a transnasal endoscopic skull base dura mater suture device according to the present invention.

[0015] Figure 7 for Figure 4 A top-down view.

[0016] Figure 8 This is a schematic diagram of the first usage state of the buckle in a transnasal endoscopic skull base dura mater suture device according to the present invention.

[0017] Figure 9 This is a schematic diagram of the second usage state of the buckle in a transnasal endoscopic skull base dura mater suture device according to the present invention.

[0018] Figure 10 This is a schematic diagram of a transnasal endoscopic skull base dura mater suture device for suturing the meninges according to the present invention. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar structures and similar variations of the present invention should be included within the scope of protection of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of description and is not intended to limit the technical solution of the present invention.

[0020] like Figures 1-10 As shown, a transnasal endoscopic skull base dura mater suture device of the present invention includes a housing 1, which is tubular. A suture head is provided at the front end of the housing 1. The suture head includes two rotating arms 2. The middle part of the two rotating arms 2 is hinged to the housing 1 through a first rotating shaft 3. An elastic element is provided between the two rotating arms 2 and the first rotating shaft 3. The elastic element biases the front ends of the two rotating arms 2 in a direction away from each other. A driving device 4 is provided at the rear end of the housing 1. The driving device 4 is connected to the rear end of the two rotating arms 2 through a transmission mechanism. Each of the two rotating arms 2 is provided with a staple clamping groove 5. The staple clamping groove 5 is rectangular and its length direction is parallel to the length direction of the rotating arm 2. The staple clamping groove 5 passes through the rotating arm 2 and divides the rotating arm 2 into two support arms 6 in the width direction. Each of the two rotating arms 2 is provided with at least three locking structures at intervals along the length direction of the rotating arm 2. Each locking structure includes two symmetrically arranged buckles 7. The two buckles 7 are respectively provided on the two support arms 6. Each of the two buckles 7 includes a clamping block 8, a wedge block 9 and a lever 10. The fulcrum of the lever 10 is hinged to the support arm 6 through a second rotating shaft. The front end of the lever 10 is hinged to the clamping block 8 through a third rotating shaft. The rear end of the lever 10 is hinged to the wedge block 9 through a fourth rotating shaft. A sliding pair parallel to the axial direction of the first rotating shaft 3 is provided between the clamping block 8 and the third rotating shaft and between the wedge block 9 and the fourth rotating shaft. A second spring support 13 is fixedly installed in the housing 1 behind the rotating arm 2, and a second spring 14 is installed on the front side of the second spring support 13.

[0021] Furthermore, the drive device 4 includes two operating arms 15, the middle of which is hinged by a fifth pivot 16. The front ends of each of the two operating arms 15 are connected to one end of a guide wire 17. The other end of each guide wire 17 passes around a first guide wheel 18, a second guide wheel 19, and a third guide wheel 20 and is connected to a rotating arm 2. The first guide wheel 18, the second guide wheel 19, and the third guide wheel 20 are disposed on the inner wall of the housing 1.

[0022] Furthermore, a first spring support 11 is fixedly provided on the side of the wedge block 9 away from the suture staple clamping groove 5 on the support arm 6, and a first spring 12 is provided between the wedge block 9 and the first spring support 11. The first spring 12 biases the wedge block 9 toward one side of the suture staple clamping groove 5.

[0023] Furthermore, each of the locking structures is respectively set in a mounting groove on the side of the rotating arm 2.

[0024] Specifically, the clamping block 8, wedge block 9, lever 10, guide wire 17, etc. in this embodiment all adopt well-known solutions in the prior art, which are already known to those skilled in the art, and will not be described in detail here.

[0025] Working principle of the invention: The operating principle of the suture head: The operator controls the opening and closing of the suture head by operating the scissors. For example... Figure 2 As shown, when the two operating arms 15 are relaxed, they open due to the action of the elastic element, and the two rotating arms 2 are in the open state. At this time, the guide wire 17 is subjected to the tension force of the rotating arms 2. When the operator applies force to clamp the operating arms 15, as... Figure 3As shown, the operating arm 15 pulls the guide wire 17 tight, and the guide wire 17 pulls the rotating arm 2 tight, thereby closing the suture head.

[0026] like Figures 4-9 As shown, the suture pin is V-shaped and has two pin arms. A set of suture pins 22 are arranged one after the other in the housing, between the inclined surface of the second spring 14 and the wedge block 9. The second spring 14 biases the entire set of suture pins towards the rotating arm 2. Under the forward thrust of the entire set of suture pins, the suture pin 21 at the first position at the front pushes the wedge block 9 outward and reaches between the two clamping blocks 8. As the wedge block 9 is pushed outward, the other end of the lever 10 hinged to the wedge block 9 pushes the two clamping blocks 8 closer, thus clamping the suture pin 21 at the first position at the front. At the same time, because the gap between the two clamping blocks 8 is occupied by the suture pin 21 at the first position at the front, the lever 10 cannot continue to rotate, and the position of the wedge block 9 at one end of the lever 10 is fixed, blocking the subsequent suture pins 22 and forming a stable state. There are a total of six locking structures on the rotating arm 2. The upper three locking structures and the lower three locking structures clamp the upper and lower nail arms of the suture nail 21 at the first position of the front end, respectively, so that when the two rotating arms 2 are closed, the two nail arms of the suture nail 21 at the first position of the front end can move with the two rotating arms 2 respectively.

[0027] During the suturing of the dura mater 23, the present invention and a transnasal endoscope are inserted into the skull base through the nasal cavity. After entering the skull base, the suture head is aligned with the dura mater 23 to be sutured. Two operating arms 15 are used to close the suture head, and two rotating arms 2 drive the two arms of the suture staples 21 to anchor them onto the dura mater. Then, the operating arms 15 are released, and the two rotating arms 2 open. Next, as... Figure 7 As shown, the subsequent suture staple 22, under the forward thrust of the entire set of suture staples, pushes the wedge 9 outward and into the space between the two clamping blocks 8. As the wedge 9 pushes outward, the other end of the lever 10, hinged to the wedge 9, pushes the two clamping blocks 8 closer, thus clamping the front suture staple 22. Simultaneously, because the gap between the two clamping blocks 8 is occupied by the suture staple 22, the lever 10 cannot continue to rotate, and the wedge 9 at one end of the lever 10 is fixed in position, blocking the subsequent suture staple 22 and restoring stability. Then, the suturing action of the next suture staple can be performed again.

[0028] This invention provides a transnasal endoscopic skull base dura mater suturer, which is similar in shape to a transnasal endoscope. It can be used to perform deep suturing of the skull base through the nasal cavity via the same approach as the endoscope. The mechanized, fine suture tip is inserted into the skull base through the nose. By using the suture tip, locking structure, suture pusher structure, and biodegradable biomaterial sutures, a tight suturing operation of the dura mater can be achieved in the narrow operating space of the skull base. This not only reduces the operation requirements but also ensures the suturing effect.

Claims

1. A transnasal endoscopic skull base dura mater suture device, characterized in that: The device includes a housing, which is tubular in shape. A sewing head is provided at the front end of the housing. The sewing head includes two rotating arms. The middle part of the two rotating arms is hinged to the housing through a first rotating shaft. An elastic element is provided between the two rotating arms and the first rotating shaft. The elastic element biases the front ends of the two rotating arms in a direction away from each other. A driving device is provided at the rear end of the housing. The driving device is connected to the rear end of the two rotating arms through a transmission mechanism. Each of the two rotating arms is provided with a suture staple holding groove. The suture staple holding groove is rectangular and its length direction is parallel to the length direction of the rotating arm. The suture staple holding groove passes through the rotating arm and divides the rotating arm into two support arms in the width direction. Each of the two rotating arms is provided with at least three locking structures at intervals along the length direction of the rotating arm. Each locking structure includes two symmetrically arranged buckles. The two buckles are respectively set on the two support arms. Each buckle includes a clamping block, a wedge block, and a lever. The fulcrum of the lever is hinged to the support arm through a second rotating shaft. The front end of the lever is hinged to the clamping block through a third rotating shaft. The rear end of the lever is hinged to the wedge block through a fourth rotating shaft. A sliding pair parallel to the axial direction of the first rotating shaft is provided between the clamping block and the third rotating shaft, and between the wedge block and the fourth rotating shaft. A second spring support is fixedly installed in the housing behind the rotating arm, and a second spring is installed on the front side of the second spring support; A set of suture pins is arranged one after the other in the housing, between the inclined surface of the second spring and the wedge. The second spring biases the entire set of suture pins toward the rotating arm. The suture pin at the first position at the front end, under the forward thrust of the entire set of suture pins, pushes the wedge outward and reaches between the two clamping blocks. As the wedge is pushed outward, the other end of the lever hinged to the wedge pushes the two clamping blocks closer, clamping the suture pin at the first position at the front end. The gap between the two clamping blocks is occupied by the suture pin at the first position at the front end, causing the lever to be unable to continue rotating. The position of the wedge at one end of the lever is fixed, blocking the subsequent suture pins.

2. The transnasal endoscopic skull base dura mater suture device according to claim 1, characterized in that: The drive device includes two operating arms, which are hinged at the middle by a fifth pivot. The front end of each of the two operating arms is connected to one end of a guide wire. The other end of each guide wire passes around a first guide wheel, a second guide wheel, and a third guide wheel before being connected to a rotating arm. The first guide wheel, the second guide wheel, and the third guide wheel are disposed on the inner wall of the housing.

3. The transnasal endoscopic skull base dura mater according to claim 1, characterized in that: A first spring support is fixedly installed on the side of the wedge block away from the suture staple clamping groove on the support arm. A first spring is provided between the wedge block and the first spring support. The first spring biases the wedge block toward one side of the suture staple clamping groove.

4. The transnasal endoscopic skull base dura mater according to claim 1, characterized in that: Each of the aforementioned locking structures is respectively disposed in the corresponding mounting groove on the side of the rotating arm.

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