Focus positioning mechanism convenient to use
By combining nickel-titanium wire positioning hooks and nylon lines, along with reinforced sleeves and return springs, the problems of difficult cutting and retraction of soft wire positioning wires are solved, achieving simple and labor-saving positioning wire cutting and preventing retraction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-04-10
AI Technical Summary
The existing flexible positioning wire is difficult to cut and is prone to backtracking, affecting ease of use.
The combination of nickel-titanium wire positioning hook and nylon line is used. The nylon line and nickel-titanium wire positioning hook are fixed by a reinforcing sleeve. Combined with a return spring, push handle, positioning groove and clamping structure, it ensures simple cutting and prevents backflow.
It achieves simple and labor-saving cutting of the positioning wire and prevents backflow, improving ease of use and positioning accuracy.
Smart Images
Figure CN224099462U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of medical devices, in particular to a lesion positioning mechanism convenient to use. BACKGROUND
[0002] The lesion positioning mechanism is a medical device for positioning a lesion by using a positioning wire, which mainly comprises a soft wire positioning wire and a guide needle, wherein the guide needle is used for assisting in guiding the soft wire positioning wire to puncture into a specified position of a human body, and then the soft wire positioning wire is pushed alone so that a positioning hook extends out of the guide needle to a lesion positioning position, so that the lesion is positioned.
[0003] However, the existing soft wire positioning wire is usually made of a nickel-titanium memory alloy wire, and when the soft wire positioning wire needs to be cut before an operation, the soft wire positioning wire made of the alloy material is relatively hard, and the cutting operation is relatively laborious, and the positioning wire may be retracted during the cutting process, which needs to be improved. CONTENT OF THE UTILITY MODEL
[0004] In order to improve the convenience of cutting the soft wire positioning wire while ensuring normal use of the soft wire positioning wire, the application provides a lesion positioning mechanism convenient to use.
[0005] The application provides a lesion positioning mechanism convenient to use, which adopts the following technical scheme:
[0006] The lesion positioning mechanism convenient to use comprises a needle seat, a guide needle arranged on the needle seat, a positioning wire arranged in the guide needle, and a pushing handle arranged on the needle seat and used for pushing the positioning wire, the positioning wire comprises a nickel-titanium wire positioning hook and a nylon wire, one end of the nylon wire is fixedly connected with the nickel-titanium wire positioning hook, and the other end of the nylon wire is connected with the pushing handle.
[0007] By adopting the above technical scheme, during use, the combination of the nylon wire and the nickel-titanium wire positioning hook is used, the positioning effect is ensured during use of the positioning wire, compared with the positioning wire made of an alloy as a whole, the nylon wire is easier to cut, so that the cutting of the positioning wire is more simple and labor-saving.
[0008] Preferably, a reinforcing sleeve is fixed at the connection position of the nylon wire and the nickel-titanium wire positioning hook.
[0009] By adopting the above technical scheme, during use, the reinforcing sleeve is arranged, the structural strength of the connection position of the nylon wire and the nickel-titanium wire positioning hook is ensured, and the tensile resistance of the positioning wire is ensured.
[0010] Preferably, the push handle slidingly arranged on the needle holder, a sleeve rod is fixed to one end of the push handle away from the positioning wire, a reset spring is sleeved on the sleeve rod, one end of the reset spring abuts against the push handle, the other end of the reset spring abuts against the needle holder, the reset spring is in a compressed state, a limiting groove is formed in the needle holder, the limiting groove is communicated with the inner cavity of the needle holder, and the push handle is arranged in the limiting groove.
[0011] By adopting the above technical scheme, when in use, the reset spring arranged in a compressed state limits the push handle, thereby preventing the push handle from being driven to retreat due to misoperation.
[0012] Preferably, a positioning groove is formed in the inner wall of the limiting groove, a positioning block is fixed to the push handle, and the positioning block is embeddedly matched with the positioning groove.
[0013] By adopting the above technical scheme, when in use, the positioning groove and the positioning block are matched, the positioning of the push handle is realized in the process of pushing the push handle, and the reset spring is matched, thereby being more convenient to use.
[0014] Preferably, a plurality of positioning grooves are arranged, and the plurality of positioning grooves are arranged at intervals along the sliding direction of the push handle.
[0015] By adopting the above technical scheme, when in use, the push handle is pushed to different positioning grooves, so as to realize the adjustment of the push length of the positioning wire, and the use is simple and convenient.
[0016] Preferably, the push handle comprises a sliding pipe slidingly arranged in the inner cavity of the needle holder, a cover detachably arranged at the end of the sliding pipe, and a hand pushing block fixed to the cover, one end of the hand pushing block away from the cover is located outside the needle holder, the nylon wire is arranged on the sliding pipe, and a clamping structure for clamping the nylon wire is arranged on the sliding pipe.
[0017] By adopting the above technical scheme, when in use, the sliding pipe, the cover and the hand pushing block are arranged, which is more convenient for the use of the push handle, and the clamping structure is matched, which is beneficial to the adjustment of the relative clamping position of the push handle and the nylon wire by medical staff, so as to adapt to different use scenes, and the nylon wire can also be positioned by the clamping structure when the nylon wire is cut off subsequently, thereby preventing the nylon wire from retreating.
[0018] Preferably, the clamping structure comprises a driving rod rotatably arranged on the sliding pipe, a clamping block fixed to the end of the driving rod, and a torsion spring arranged between the driving rod and the sliding pipe, and the clamping block abuts against the nylon wire.
[0019] By adopting the technical scheme, in use, medical staff only needs to press the driving rod, which can drive the clamping block to abut against the nylon line, so as to realize clamping of the nylon line in cooperation with the inner wall of the sliding tube, which is simple and convenient to use, and after adjustment is completed, only needs to release the driving rod, and under the action of the torsional spring, the driving rod is rotated to reset.
[0020] Preferably, the guide needle, the nitinol wire positioning hook and the nylon line are all provided with a distinguishing mark part.
[0021] By adopting the technical scheme, in use, the guide needle, the nitinol wire positioning hook and the non-mark part of the nylon line are obviously distinguished through the distinguishing mark part, so as to facilitate medical staff to use the device for positioning.
[0022] In summary, the present application has at least one of the following beneficial technical effects:
[0023] 1. By the combination of the nylon line and the nitinol wire positioning hook, cooperating with the reinforcing sleeve, under the premise of ensuring the positioning effect of the positioning wire in use, compared with the positioning wire made of alloy as a whole, the nylon line is easier to cut, so that the cutting of the positioning wire is more simple and labor-saving;
[0024] 2. By cooperation of the reset spring, the pushing handle, the positioning block and the positioning groove, in the process of pushing the positioning wire, the situation that the positioning wire is retracted due to misoperation is prevented, and the overall use convenience of the device is improved;
[0025] 3. By cooperation of the sliding tube, the cover, the hand pushing block and the clamping structure, it is beneficial for medical staff to adjust the relative clamping position of the pushing handle and the nylon line, so as to adapt to different use scenarios, and at the same time, when cutting the nylon line later, the nylon line can also be positioned by the clamping structure to prevent the nylon line from retreating. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is the axonometric view mainly embodying the overall structure in the embodiment of the present application;
[0027] Figure 2 is the schematic view mainly embodying the positioning wire structure in the embodiment of the present application;
[0028] Figure 3 is the exploded view mainly embodying the pushing handle structure in the embodiment of the present application;
[0029] Figure 4 is the axonometric view mainly embodying the pushing handle structure in the embodiment of the present application;
[0030] Figure 5 is the axonometric view mainly embodying the clamping structure in the embodiment of the present application.
[0031] Mark No.: 1, needle seat; 11, limiting groove; 12, positioning groove; 2, guide needle; 3, positioning wire; 31, nickel-titanium wire positioning hook; 32, nylon wire; 4, pushing handle; 41, positioning block; 42, sliding tube; 43, cover; 44, hand pushing block; 5, reinforcing sleeve; 6, sleeve rod; 7, reset spring; 8, clamping structure; 81, driving rod; 82, clamping block; 83, torsional spring; 9, distinguishing mark part; 10, push rod. DETAILED DESCRIPTION
[0032] The following will be described in detail in combination with the accompanying Figure 1 - the accompanying Figure 5 The present application is further described in detail.
[0033] The present application discloses a lesion positioning mechanism which is convenient to use.
[0034] Reference Figure 1 A lesion positioning mechanism which is convenient to use comprises a needle seat 1 placed horizontally, a guide needle 2, a positioning wire 3 and a pushing handle 4. The needle seat 1 is in the shape of a cylinder as a whole, and the two ends of the needle seat 1 in the length direction are conically arranged. The guide needle 2 is fixed at one end of the needle seat 1 and extends away from the needle seat 1 at the other end. The positioning wire 3 is arranged in the needle seat 1 and the guide needle 2. The pushing handle 4 is arranged on the needle seat 1 in a sliding manner and is used to push the positioning wire 3 to slide along the guide needle 2 in the axial direction.
[0035] Reference Figure 1 and Figure 2 The positioning wire 3 is composed of a nickel-titanium wire positioning hook 31 and a nylon wire 32. The nickel-titanium wire positioning hook 31 is made of a nickel-titanium memory alloy wire, and the nylon wire 32 is made of a medical nylon material. The nickel-titanium wire positioning hook 31 is fixed at the end of the nylon wire 32 by adhesive. In this embodiment, before the nickel-titanium wire positioning hook 31 and the nylon wire 32 are bonded, the bonding part of the nylon wire 32 and the nickel-titanium wire positioning hook 31 is sanded with fine sandpaper to increase the bonding degree. A reinforcing sleeve 5 is arranged at the connection between the nylon wire 32 and the nickel-titanium wire positioning hook 31, and the reinforcing sleeve 5 is bonded and fixed with the nylon wire 32 and the nickel-titanium wire positioning hook 31 by applying adhesive, so as to ensure the connection strength of the nylon wire 32 and the nickel-titanium wire positioning hook 31. Then, a tensile test is performed to ensure that the tensile property meets the standard.
[0036] Reference Figure 3 and Figure 4, the push handle 4 includes a sliding tube 42, a cover 43 and a pushing block 44, the sliding tube 42 is arranged in the needle seat 1 and slides along the axial direction of the needle seat 1, the cover 43 is threadedly connected to one end of the sliding tube 42, and the pushing block 44 is integrally formed with the cover 43; a limiting groove 11 is formed in the needle seat 1 and communicates with the inner cavity of the needle seat 1, the length direction of the limiting groove 11 is parallel to the axial direction of the needle seat 1, one end of the pushing block 44 away from the cover 43 extends to the outside of the needle seat 1 from the limiting groove 11, and the pushing block 44 slides along the length direction of the limiting groove 11 in the limiting groove 11; a sleeve rod 6 is integrally formed at one end of the sliding tube 42 away from the cover 43, a return spring 7 is sleeved on the sleeve rod 6, and the sleeve rod 6 is slidably connected with the inner wall of the needle seat 1; one end of the return spring 7 abuts against the end of the sliding tube 42, and the other end of the return spring 7 abuts against the inner wall of the needle seat 1.
[0037] With reference to Figure 3 and Figure 4 In the present application, the return spring 7 is initially in a compressed state, that is, under the action of no external force in use, the return spring 7 drives the push handle 4 to slide as a whole until the side wall of the pushing block 44 abuts against the side wall of the limiting groove 11; after the positioning wire 3 is pushed to the nickel-titanium wire positioning hook 31 at the end and the nickel-titanium wire positioning hook 31 is moved to the specified position, the pushing block 44 can be limited by the pushing force of the return spring 7, so as to ensure that the positioning wire 3 is not retracted in case of misoperation, and the use of the device as a whole is more convenient; meanwhile, the length of the limiting groove 11 limits the sliding distance of the push handle 4, so as to avoid that the nickel-titanium wire positioning hook 31 is too long in extension in the subsequent process of pushing the positioning wire 3.
[0038] With reference to Figure 3 and Figure 4 In the case of not using the positioning wire 3, in order to avoid that the nickel-titanium wire positioning hook 31 slides out of the guide needle 2, a positioning groove 12 is further formed in the inner wall of the limiting groove 11, the positioning groove 12 is located at one end of the limiting groove 11 away from the guide needle 2, and the positioning groove 12 is formed in the circumferential direction of the needle seat 1; a positioning block 41 is integrally formed on the side wall of the cover 43 and is embeddedly matched with the positioning groove 12; in use, the medical staff can rotate the push handle 4 to make the positioning block 41 rotate and be embedded in the positioning groove 12, so as to limit the positioning block 41 by the positioning groove 12, thereby preventing the push handle 4 from sliding under the elastic force of the return spring 7 and driving the nickel-titanium wire positioning hook 31 to slide to the outside of the guide needle 2.
[0039] With reference to Figure 3 and Figure 4, the positioning groove 12 can be opened according to actual use requirements, and the plurality of positioning grooves 12 are arranged along the length direction of the limiting groove 11, and in the embodiment, the positioning grooves 12 are preferably arranged as two, and one of the positioning grooves 12 is used for limiting the initial state of the pushing handle 4, preventing the nitinol wire positioning hook 31 from sliding out of the guide needle 2 in the non-use state, and the second positioning groove 12 is used for limiting the use state of the pushing handle 4, cooperating with the reset spring 7, and further ensuring that the positioning wire 3 is retracted due to the backward movement of the pushing handle 4 caused by the misoperation.
[0040] Referring to Figure 4 and Figure 5 , the nylon wire 32 is partially arranged in the sliding tube 42, and a push rod 10 is arranged at the connection between the nylon wire 32 and the pushing handle 4, one end of the push rod 10 is fixed on the pushing handle 4, and a clamping structure 8 is arranged on the sliding tube 42, the clamping structure 8 is used for clamping the positioning nylon wire 32, so as to prevent the relative sliding between the pushing handle 4 and the nylon wire 32 under the action of no external force, and to prevent the situation that the positioning wire 3 cannot be normally pushed, the clamping structure 8 includes a driving rod 81, a clamping block 82 and a torsional spring 83, wherein the driving rod 81 is rotationally connected in the sliding tube 42, one end of the driving rod 81 extends out of the sliding tube 42, and the other end of the driving rod 81 is located in the sliding tube 42, the clamping block 82 is integrally formed at one end of the driving rod 81 located in the sliding tube 42, and the clamping block 82 and the inner wall of the sliding tube 42 can form clamping positioning on the nylon wire 32.
[0041] Referring to Figure 4 and Figure 5 , the torsional spring 83 is arranged at the rotation axis of the driving rod 81, and the torsional spring 83 is used for driving the driving rod 81 to rotate and reset; in use, the clamping block 82 presses the nylon wire 32 against the inner wall of the sliding tube 42 in the initial state, so that the nylon wire 32 is relatively fixed with the pushing handle 4, at this time, pushing the pushing handle 4 will drive the nylon wire 32 to move, which is convenient for medical staff to push the positioning wire 3, when the positioning wire 3 needs to be cut off after being pushed to the specified position, the clamping block 82 and the positioning block 41 are matched to prevent the positioning wire 3 from retracting, after the nylon wire 32 is cut off, the clamping block 82 can be separated from the nylon wire 32 by pressing the driving rod 81, and then the pushing handle 4 can be retracted, so that the pushing handle 4 and the positioning wire 3 are separated, which is convenient for subsequent surgical operation.
[0042] Referring to Figure 1 , in addition, in order to further improve the use convenience of the whole device, the guide needle 2, the nitinol wire positioning hook 31 and the nylon wire 32 are all provided with a distinguishing mark part 9, the distinguishing mark part 9 is obviously contrasted with the non-mark part on the guide needle 2, the nitinol wire positioning hook 31 and the nylon wire 32, so as to assist the medical staff to judge in the ultrasonic examination process, in the embodiment, the distinguishing mark part 9 is made by laser or chemical etching.
[0043] The implementation principle of the embodiment of the application is: in use, first, the guide needle 2 and the positioning wire 3 are combined together, then the positioning wire 3 is driven to puncture into the patient's body through the guide needle 2, then the push handle 4 is rotated to make the positioning block 41 disengage from the first positioning groove 12, so that the push handle 4 is moved to the direction of the second positioning groove 12 under the auxiliary action of the reset spring 7, and the nickel-titanium wire positioning hook 31 is slowly extended out of the guide needle 2, when the end of the push handle 4 abuts against the inner wall of the limiting groove 11, the nickel-titanium wire positioning hook 31 moves to the specified position, at this time, the positioning block 41 can be embedded into the second positioning groove 12 by rotating the push handle 4, so as to complete the preliminary positioning of the lesion, then the nylon wire 32 at the rear end of the needle seat 1 can be cut off, and the clamping block 82 is disengaged from the nylon wire 32 by pressing the driving rod 81, so that the needle seat 1, the push handle 4 and the guide needle 2 are withdrawn as a whole, the guide needle 2 is disengaged from the nylon wire 32, and thus the positioning of the positioning wire 3 is completed, the whole process is simple and convenient, and the situation that the positioning wire 3 is retracted due to misoperation is reduced.
[0044] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: equivalent changes made according to the structure, shape and principle of the application should be covered within the protection scope of the application.
Claims
1. A lesion positioning mechanism that is easy to use, characterized by: The application relates to a needle set, which comprises a needle seat (1), a guide needle (2) arranged on the needle seat (1), a positioning wire (3) arranged in the guide needle (2), and a pushing handle (4) arranged on the needle seat (1) and used for pushing the positioning wire (3), wherein the positioning wire (3) comprises a nickel-titanium wire positioning hook (31) and a nylon wire (32), one end of the nylon wire (32) is fixedly connected with the nickel-titanium wire positioning hook (31), and the other end of the nylon wire (32) is connected with the pushing handle (4).
2. A lesion positioning mechanism for ease of use according to claim 1, characterized in that: A reinforcing sleeve (5) is fixedly connected at the connection position of the nylon wire (32) and the nickel-titanium wire positioning hook (31).
3. A lesion positioning mechanism for ease of use as defined in claim 1, wherein: The pushing handle (4) is slidably arranged on the needle seat (1), one end of the pushing handle (4) away from the positioning wire (3) is fixedly connected with a sleeve rod (6), a reset spring (7) is sleeved on the sleeve rod (6), one end of the reset spring (7) is abutted against the pushing handle (4), the other end of the reset spring (7) is abutted against the needle seat (1), the reset spring (7) is in a compressed state, a limiting groove (11) is arranged on the needle seat (1) and communicates with the inner cavity of the needle seat (1), and the pushing handle (4) is arranged in the limiting groove (11).
4. A lesion positioning mechanism according to claim 3, wherein: A positioning groove (12) is arranged on the inner wall of the limiting groove (11), a positioning block (41) is fixedly arranged on the pushing handle (4), and the positioning block (41) is embeddedly matched with the positioning groove (12).
5. A lesion positioning mechanism for ease of use according to claim 4, wherein: A plurality of positioning grooves (12) are arranged and are spaced apart along the sliding direction of the pushing handle (4).
6. A lesion positioning mechanism for ease of use as defined in claim 3, wherein: The pushing handle (4) comprises a sliding pipe (42) slidably arranged in the inner cavity of the needle seat (1), a cover (43) detachably arranged on the end of the sliding pipe (42), and a hand pushing block (44) fixedly arranged on the cover (43), one end of the hand pushing block (44) away from the cover (43) is located outside the needle seat (1), the nylon wire (32) is arranged on the sliding pipe (42), and a clamping structure (8) for clamping the nylon wire (32) is arranged on the sliding pipe (42).
7. A lesion positioning mechanism according to claim 6, wherein: The clamping structure (8) comprises a driving rod (81) rotatably arranged on the sliding pipe (42), a clamping block (82) fixedly arranged on the end of the driving rod (81), and a torsional spring (83) arranged between the driving rod (81) and the sliding pipe (42), and the clamping block (82) is abutted against the nylon wire (32).
8. A lesion positioning mechanism for ease of use as defined in claim 1, wherein: The guide needle (2), the nickel-titanium wire positioning hook (31) and the nylon wire (32) are all provided with a distinguishing mark (9).