Torque device
By designing a torque device for intracranial arterial vascular stenosis and aneurysm surgery, the combination of clamping components and handle sleeves solves the problem of stent twisting in the microcatheter, reducing the risk of surgery and improving the success rate of surgery.
Patent Information
- Application Number
- CN202323585387.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-27
AI Technical Summary
In surgery for intracranial artery stenosis and aneurysm, the torsion of the stent within the microcatheter causes scratches the endometrium of the stent and the microcatheter, which may lead to failure of the surgery or permanent damage. The existing torque device cannot effectively solve this problem.
A torque device including a clamping assembly and a handle sleeve is designed to fix the guide wire through the clamping assembly, and the clamping assembly is driven to rotate through the handle sleeve when the guide wire is twisted, releasing torsional force and reducing the bracket in the micro-conduit the probability of reversal.
It effectively reduces the probability of stent twisting in the microcatheter, reduces the occurrence of medical accidents, and improves the success rate of surgery.
Smart Images
Figure CN222172844U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a torque device. Background Art
[0002] Intracranial stent systems have gradually become the mainstream way to solve intracranial arterial stenosis and aneurysms. Due to the tortuousness and complexity of intracranial blood vessels, the key to the success of the operation is that the stent can smoothly reach the lesion site.
[0003] The delivery of the stent requires that the microcatheter be passed through the blood vessel to reach the lesion site, and then the stent is pushed to the lesion site from the inner cavity of the microcatheter through the delivery guidewire. During the delivery of the stent, the delivery guidewire will twist when passing through a tortuous blood vessel, and the proximal end of the delivery guidewire is clamped and fixed by the operator with a torque device. When the operator continues to push the stent, the torsional force on the delivery guidewire gradually increases. Since the proximal end of the delivery guidewire is fixed by the operator, the torsion of the delivery guidewire can only be released through the distal end. During the release process, the stent on the delivery guidewire may twist in the microcatheter. When the stent twists in the microcatheter, it will cause the stent to rub against the inner membrane of the microcatheter, which may cause the stent to fail to be pushed out and the operation to fail, or even cause permanent damage to the patient. Utility Model Content
[0004] The main purpose of the utility model is to provide a torque device, aiming to reduce the probability of the stent being twisted in the microcatheter.
[0005] In order to achieve the above-mentioned purpose, the torque device proposed by the utility model comprises:
[0006] A clamping assembly, the clamping assembly is used to clamp a delivery guide wire passing through the clamping assembly, the clamping assembly includes a mounting section; and
[0007] A handle sleeve is rotatably sleeved on the mounting section.
[0008] Optionally, the clamping assembly includes a core nut, a handle and a core;
[0009] A sandwich nut, wherein the sandwich nut is formed with a thread groove and a tapered groove that are connected, and a first through hole is formed at the bottom of the tapered groove;
[0010] A handle, the handle comprising the mounting section and a clamping section connected to the mounting section, the clamping section being screwed to the threaded groove, a clamping groove being formed at one end of the clamping section away from the mounting section, and the handle being provided with a second through hole penetrating the clamping section and the mounting section;
[0011] A sandwich core, a part of the structure of the sandwich core is inserted into the clamping groove, and the sandwich core is provided with a third through hole;
[0012] Wherein, the first through hole, the second through hole and the third through hole are coaxially arranged.
[0013] Optionally, the handle further comprises a gripping section, the clamping section and the mounting section are arranged at two ends of the gripping section, and a plurality of anti-slip protrusions are formed on an outer peripheral wall of the gripping section.
[0014] Optionally, the torque device also includes a handle base, which is detachably disposed at one end of the mounting section away from the gripping section, and the handle base, the mounting section and the gripping section together form a limiting groove, and the handle sleeve is located in the limiting groove.
[0015] Optionally, an inner wall of the second through hole is formed with an internal thread at one end away from the sandwich nut, and the handle base has a threaded end, which is screwed to the second through hole; the handle base is provided with a fourth through hole connected to the second through hole.
[0016] Optionally, a conical opening communicating with the first through hole is formed at one end of the sandwich nut away from the handle.
[0017] Optionally, the sandwich core includes a sandwich core body and a plurality of clips arranged at one end of the sandwich core body, the sandwich core body is inserted into the clamping groove, and the plurality of clips can be moved closer to each other to clamp the delivery guide wire or moved away from each other to loosen the delivery guide wire.
[0018] Optionally, a plurality of anti-slip protrusions are formed on the outer peripheral wall of the handle sleeve.
[0019] Optionally, the handle sleeve is clearance-fitted with the mounting section.
[0020] Optionally, the handle sleeve is made of high-density polyethylene or polypropylene.
[0021] In the technical solution of the utility model, the delivery guide wire can be clamped and fixed by the clamping assembly, and then the operator can hold the handle sleeve to move the delivery guide wire to push the stent. When the delivery guide wire twists after passing through a tortuous blood vessel, the delivery guide wire can drive the clamping assembly to rotate in the handle sleeve through the installation section, thereby releasing the twisting of the delivery guide wire in time, reducing the probability of the stent twisting in the microcatheter and reducing the occurrence of medical accidents. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0023] Figure 1 A schematic structural diagram of an embodiment of a torque device provided by the utility model;
[0024] Figure 2 It is a structural schematic diagram of a sandwich nut;
[0025] Figure 3 It is a schematic diagram of the structure of the handle;
[0026] Figure 4 It is a schematic diagram of the structure of the sandwich;
[0027] Figure 5 It is a structural schematic diagram of the handle base;
[0028] Figure 6 This is a diagram showing the effect of using the torque device.
[0029] Description of Figure Numbers:
[0030] Label name Label name 1000 Torque device 24 Second through hole 1 Sandwich nut 3 Sandwich 11 First through hole 31 Sandwich body 12 Conical opening 32 Clip 2 handle 33 The third through hole 21 Installation section 4 Handle sleeve 22 Clamping section 5 Handle base 23 Grip Section 51 Threaded end
[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0034] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0035] Please refer to Figures 1 to 6 The utility model proposes a torque device 1000, including a clamping assembly and a handle sleeve 4; the clamping assembly is used to clamp the delivery guide wire passing through the clamping assembly, and the clamping assembly includes a mounting section 21; the handle sleeve 4 is rotatably sleeved on the mounting section 21.
[0036] In this embodiment, the delivery guide wire can be clamped and fixed by the clamping assembly, and then the operator can hold the handle sleeve 4 to move the delivery guide wire to push the stent. When the delivery guide wire twists after passing through a tortuous blood vessel, the delivery guide wire can drive the clamping assembly to rotate in the handle sleeve 4 through the mounting section 21, thereby releasing the twisting of the delivery guide wire in time, reducing the probability of the stent twisting in the microcatheter and reducing the occurrence of medical accidents.
[0037] Specifically, in one embodiment of the present invention, please refer to Figure 1 The clamping assembly includes a core nut 1, a handle 2 and a core 3. The core nut 1 is formed with a connected thread groove and a tapered groove, and a first through hole 11 is provided at the bottom of the tapered groove. The handle 2 includes a mounting section 21 and a clamping section 22 connected to the mounting section 21, the clamping section 22 is screwed to the thread groove, and a clamping groove is formed at one end of the clamping section 22 away from the mounting section 21, and the handle 2 is provided with a second through hole 24 that passes through the clamping section 22 and the mounting section 21; a part of the structure of the core 3 is inserted into the clamping groove, and the core 3 is provided with a third through hole 33; wherein the first through hole 11, the second through hole 24 and the third through hole 33 are coaxially arranged. When in use, the conveying guide wire passes through the first through hole 11, the third through hole 33 and the second through hole 24 in sequence, and then is gradually tightened through the core nut 1 and the handle 2. The core 3 will enter the conical groove of the core nut 1, so that the core 3 will be gathered toward the middle, thereby fixing the conveying guide wire for subsequent pushing work; when it is necessary to loosen the conveying guide wire, it is only necessary to loosen the core nut 1 and the handle 2 to allow the core 3 to withdraw from the conical groove and no longer fix the conveying guide wire.
[0038] In order to facilitate tightening or loosening the handle 2, in one embodiment of the present utility model, please refer to Figure 3The handle 2 also includes a gripping section 23, a clamping section 22 and a mounting section 21 are arranged at both ends of the gripping section 23, and a plurality of anti-slip protrusions are formed on the outer peripheral wall of the gripping section 23. The plurality of anti-slip protrusions can increase the friction coefficient of the outer peripheral wall of the gripping section 23, that is, increase the friction force when the hand contacts the gripping section 23, thereby facilitating tightening the handle 2 with the core nut 1 or unscrewing the handle 2 out of the core nut 1.
[0039] Further, in one embodiment of the present invention, please refer to Figure 1 The torque device 1000 further includes a handle base 5, which is detachably disposed at one end of the mounting section 21 away from the gripping section 23. The handle base 5, the mounting section 21 and the gripping section 23 enclose a limiting groove, and the handle sleeve 4 is located in the limiting groove. Specifically, the outer diameter of the gripping section 23 is larger than the outer diameter of the mounting section 21, and the maximum outer diameter of the handle base 5 is also larger than the outer diameter of the mounting section 21. After the handle sleeve 4 is sleeved on the mounting section 21, the handle base 5 is installed. The gripping section 23 and the handle base 5 can limit the handle sleeve 4, thereby preventing the handle sleeve 4 from being separated from the mounting section 21 during the pushing process.
[0040] The handle base 5 can be screwed or snap-fitted with the handle 2. In one embodiment of the present invention, please refer to Figure 1 , Figure 3 and Figure 5 The handle base 5 is screwed with the handle 2. An inner thread is formed on the inner peripheral wall of the second through hole 24 at one end away from the sandwich nut 1. The handle base 5 has a threaded end 51, which is screwed with the second through hole 24. The screw connection has a high connection strength and can withstand large tension and shear forces. When the delivery guide wire is driven backward, the handle sleeve 4 will abut against the handle base 5. At this time, the handle base 5 can be stably connected with the handle 2 and is not easy to separate. In addition, the handle base 5 is provided with a fourth through hole connected with the second through hole 24, and the fourth through hole is used for the delivery guide wire to pass through.
[0041] Further, in one embodiment of the present invention, please refer to Figure 2 A conical opening 12 connected to the first through hole 11 is formed at one end of the sandwich nut 1 away from the handle 2. The taper of the conical opening 12 is 45° to 60°, and the diameter of the first through hole 11 is 0.3mm to 0.6mm. Through the design of the conical opening 12, the delivery guide wire can be easily passed through the first through hole 11.
[0042] In order to facilitate the clamping of the delivery guide wire, the sandwich core 3 includes a sandwich core body 31 and a plurality of clips 32 arranged at one end of the sandwich core body 31. The sandwich core body 31 is inserted into the clamping groove. In one embodiment of the utility model, please refer to Figure 1 and Figure 4There are four clips 32. When the handle 2 and the core nut 1 are gradually tightened, the four clips 32 will gradually penetrate into the conical groove, and then the four clips 32 will approach each other to clamp the delivery guide wire. The four clips 32 enclose a cross groove, and a third through hole 33 is opened at the center of the bottom of the cross groove. The diameter of the third through hole 33 is less than 0.15 mm. If the diameter is too large, the delivery guide wire cannot be effectively fixed. The cross groove also facilitates the delivery guide wire to pass through the third through hole 33.
[0043] Further, in one embodiment of the present invention, please refer to Figure 1 The outer wall of the handle sleeve 4 forms a plurality of anti-skid protrusions, which can increase the friction coefficient of the outer wall of the handle sleeve 4, that is, increase the friction force when the hand contacts the handle sleeve 4, making it easier to hold the torque device 1000.
[0044] In order to enable the handle 2 to rotate smoothly in the handle sleeve 4, in one embodiment of the present utility model, please refer to Figure 1 The mounting section 21 is a smooth section, and the handle sleeve 4 and the mounting section 21 are clearance-matched, so that the friction between the handle sleeve 4 and the handle 2 is low, and the handle 2 can be relatively easy to rotate in the handle sleeve 4. When the delivery guide wire is twisted, the delivery guide wire can easily drive the clamping assembly to rotate in the handle sleeve 4, thereby releasing the twisting of the delivery guide wire in time, reducing the probability of the stent twisting in the microcatheter, and reducing the occurrence of medical accidents.
[0045] The material of the sandwich nut 1, the handle 2, the handle sleeve 4 and the handle base 5 can be selected from one of the polymer materials such as medical grade ABS resin, HDPE (high-density polyethylene), PC (polycarbonate), PP (polypropylene), PA (polyamide), etc., so as to have high strength and height, good chemical resistance and heat resistance, so as to meet the use requirements of the medical environment. The material of the sandwich 3 can be selected from one of the metal materials such as brass, 304 stainless steel, 316 stainless steel, etc. These materials are easy to process and have high strength and can withstand a certain load.
[0046] During the stent delivery process, the delivery guide wire passes through the torque device 1000, through the grip section 23 of the handheld handle 2, and the clamp nut 1 is tightened to fix the delivery guide wire. Then the handheld handle sleeve 4 starts to deliver the entire stent system. When passing through a tortuous blood vessel, the delivery guide wire is twisted, which can drive the handle 2 to rotate in the handle sleeve 4, releasing the torque of the entire device.
[0047] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A torque device, It is characterized in that include: A clamping assembly, the clamping assembly is used to clamp a delivery guide wire passing through the clamping assembly, the clamping assembly includes a mounting section; and A handle sleeve is rotatably sleeved on the mounting section.
2. The torque device according to claim 1, It is characterized in that The clamping assembly includes a core nut, a handle and a core; A sandwich nut, wherein the sandwich nut is formed with a thread groove and a tapered groove that are connected, and a first through hole is formed at the bottom of the tapered groove; A handle, the handle comprising the mounting section and a clamping section connected to the mounting section, the clamping section being screwed to the threaded groove, a clamping groove being formed at one end of the clamping section away from the mounting section, and the handle being provided with a second through hole penetrating the clamping section and the mounting section; A sandwich core, a part of the structure of the sandwich core is inserted into the clamping groove, and the sandwich core is provided with a third through hole; Wherein, the first through hole, the second through hole and the third through hole are coaxially arranged.
3. The torque device according to claim 2, It is characterized in that The handle further comprises a gripping section, the clamping section and the mounting section are arranged at two ends of the gripping section, and a plurality of anti-slip protrusions are formed on the outer peripheral wall of the gripping section.
4. The torque device according to claim 3, It is characterized in that The torque device also includes a handle base, which is detachably arranged at one end of the mounting section away from the gripping section. The handle base, the mounting section and the gripping section together form a limiting groove, and the handle sleeve is located in the limiting groove.
5. The torque device according to claim 4, It is characterized in that An inner wall of the second through hole is provided with an internal thread at one end away from the sandwich nut, and the handle base has a threaded end which is screwed to the second through hole; the handle base is provided with a fourth through hole which is connected to the second through hole.
6. The torque device according to claim 2, It is characterized in that A conical opening communicating with the first through hole is formed at one end of the sandwich nut away from the handle.
7. The torque device according to claim 2, It is characterized in that The sandwich core comprises a sandwich core body and a plurality of clips arranged at one end of the sandwich core body. The sandwich core body is inserted into the clamping groove. The plurality of clips can be moved closer to each other to clamp the conveying guide wire or moved away from each other to loosen the conveying guide wire.
8. The torque device according to any one of claims 1 to 7, It is characterized in that A plurality of anti-slip protrusions are formed on the outer peripheral wall of the handle sleeve.
9. The torque device according to any one of claims 1 to 7, It is characterized in that The handle sleeve is clearance-matched with the mounting section.
10. The torque device according to any one of claims 1 to 7, It is characterized in that The handle sleeve is made of high-density polyethylene or polypropylene.