Auxiliary ablation needle fixing device

Abstract

The utility model relates to an ablation needle auxiliary fixing device, and belongs to the technical field of medical instruments. The fixing device comprises a base, a first joint, a second joint, a third joint and a chuck, the third joint is provided with a fastening nut, and when the fastening nut is screwed, a first push rod is driven through an inclined sliding block mechanism to lock a first ball head of the first joint, and meanwhile a second push rod is driven to lock a second ball head of the second joint. According to the utility model, the structure can be fastened or loosened by only one fastening nut, the operation is convenient, and the working efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to an auxiliary fixing device for an ablation needle and belongs to the technical field of medical devices. Background Art

[0002] At present, in the clinical application of ablation needle puncture, ultrasound or CT-guided imaging technology is usually used to find and determine the location of the lesion. During the angiography process, the ablation needle must be kept in a relatively static state to accurately determine whether it has penetrated the lesion. During the ablation process, in order to achieve a satisfactory ablation effect, the relative position of the ablation needle needs to be stable, so the fixation of the ablation needle is particularly important in clinical applications. However, in most clinical cases, the puncture direction will change due to various factors such as the gravity of the instrument, the movement of the bed during the scan, the patient's involuntary movement, and muscle traction.

[0003] Doctors or engineers have adopted many methods to address the above pain points, of which two are representative: one is to use auxiliary puncture robots, but the cost of puncture positioning robots is high and the use process is complicated, which increases the medical burden on patients. The second is to use positioning devices attached to the surface of the human body, but the effect of some puncture positions is poor and cannot meet various puncture angles, which has limitations.

[0004] The applicant searched and found that the Chinese patent with application number 202022392641.X discloses a follow-up directional puncture fixture that can be attached to the movable bed surface of the CT bed and move synchronously with the patient, and adjust the various puncture angles of the ablation needle through three movable joints. However, when adjusting the angle of the puncture needle, the fixture needs to tighten and loosen the three joints separately, which makes the operation more cumbersome. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an auxiliary fixing device for an ablation needle which is convenient for adjusting the angle of the ablation needle.

[0006] In order to solve the above technical problems, the technical solution proposed by the utility model is: an auxiliary fixing device for an ablation needle, comprising a base, a first joint, a second joint, a third joint, a first hollow rod, a second hollow rod and a chuck, wherein a first push rod is arranged in the first hollow rod, and a second push rod is arranged in the second hollow rod;

[0007] The first joint comprises a first ball head and a first ball head cap, and the first ball head is fixedly connected to the base;

[0008] The second joint comprises a second ball head and a second ball head cap, and the second ball head is fixedly connected to the chuck;

[0009] One end of the first hollow rod is fixedly connected to the first ball cap, and the other end of the first hollow rod is bent to form a first bent portion; one end of the second hollow rod is fixedly connected to the second ball cap, and the other end of the second hollow rod is bent to form a second bent portion;

[0010] The third joint comprises a sleeve, a fastening nut, a first axially inclined slider, and a second axially inclined slider. A boss extending outward is provided at the middle portion of the outer side of the sleeve. Both ends of the sleeve are respectively sleeved with the first bending portion and the second bending portion. The first axially inclined slider and the second axially inclined slider are respectively located in the first bending portion and the second bending portion. The first axially inclined slider is provided with a threaded rod extending axially along the first bending portion. The threaded rod passes through the sleeve and the second axially inclined slider and is threadedly connected with the fastening nut so that the fastening nut abuts against the second axially inclined slider.

[0011] One end of the first push rod is close to the first ball head, and the other end of the first push rod is close to the first shaft inclined slider. The first push rod has an inclined surface matched with the first shaft inclined slider.

[0012] One end of the second push rod is close to the second ball head, and the other end of the second push rod is close to the second shaft inclined slider. The second push rod has an inclined surface matched with the second shaft inclined slider.

[0013] The fastening nut is in a locked state, at which time the fastening nut compresses the second shaft inclined slider to drive the second push rod to press against the second ball head. At the same time, the fastening nut drives the first shaft inclined slider to drive the first push rod to press against the first ball head through the threaded rod.

[0014] The working process of the ablation needle auxiliary fixation device of the utility model when in use is as follows:

[0015] 1) Position selection: The patient lies on the operating table, and a suitable position for application is found on the patient's body surface. The position should be as close to the puncture point as possible to ensure that it is within the movable range of the auxiliary fixation device. If there is no good position on the patient's body surface, a suitable position on the operating table can be selected. Use a replaceable double-sided tape to stick on the bottom of the auxiliary fixation bracket, and then peel off the bottom of the double-sided tape and apply it to the position. 2) Ablation needle puncture and fixation: The doctor operates the ablation needle to complete the puncture, and then adjusts the auxiliary fixation device to place the ablation needle in the chuck. After the angle adjustment is completed, tighten the fixing nut to fix the whole. 3) Puncture position inspection: Use imaging technology guided by ultrasound or CT to determine whether the puncture meets the requirements. If adjustment is required, loosen the fixing nut, adjust the position of the ablation needle, and then tighten the fixing nut. 4) Complete ablation work: After the ablation needle is adjusted, ablation work is performed. After completion, remove the auxiliary fixation device from the patient's body surface or the operating table to end the operation.

[0016] The utility model has three movable joints, and can select any fixed position within the range of motion of the auxiliary fixing device, which can significantly improve the structural stability of the auxiliary fixing bracket and meet various puncture angles of the ablation needle. The utility model can simultaneously drive the first push rod and the second push rod to respectively press against the first ball head and the second ball head by tightening the fastening nut, and the first ball head and the second ball head can be released by loosening the fastening nut to adjust the angle and position of the ablation needle. The structure can be tightened or loosened by only one fastening nut, which is convenient to operate and can effectively improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0018] Figure 2 yes Figure 1 Schematic diagram of the cross section of section A.

[0019] Figure 3 yes Figure 1 Schematic cross-sectional view of part B in FIG.

[0020] Figure 4 It is a schematic diagram of the structure of the chuck.

[0021] Figure numerals: 1. base; 2. first ball head; 3. first ball head cap; 4. first ball head cap base; 5. first push rod; 6. first hollow rod; 7. first limiting ring; 8. bushing; 9. fastening nut; 10. second axial inclined sliding block; 11. second hollow rod; 12. second push rod; 13. first axial inclined sliding block; 14. ablation needle; 15. clamping seat; 16. clamping screw; 17. push block; 18. cover plate; 19. double-sided tape; 20. clamping groove; 21. through hole; 22. second ball head; 23. second ball head cap; 24. second ball head cap base; 25. first bending portion; 26. second bending portion. DETAILED DESCRIPTION

[0022] This embodiment relates to an auxiliary fixation device for an ablation needle, such as Figure 1 As shown, it includes a base 1, a first joint, a second joint, a third joint, a first hollow rod 6, a second hollow rod 11 and a chuck, wherein the first hollow rod 6 is provided with a first push rod 5, and the second hollow rod 11 is provided with a second push rod 12. When in use, the bottom of the base 1 is fixed to the patient's body surface or the operating table by a replaceable double-sided adhesive tape 19, and the main structure can be reused, thereby reducing the cost of use. The chuck can adopt the chuck structure disclosed in the Chinese patent application number 202022392641.X.

[0023] like Figure 2As shown, the first joint includes a first ball head 2 and a first ball head cap 3. The first ball head 2 is fixedly connected to the base 1 through a thread. The base 1 is used to carry an auxiliary fixing device. The first ball head 2 and the first ball head cap 3 fixed on the base 1 are connected to meet the rotation at any angle. The material of the first ball head 2 can be selected from polymer materials or wear-resistant alloy materials.

[0024] The second joint comprises a second ball head 22 and a second ball head cap 23. The second ball head 22 is fixedly connected to the chuck. The structure of the second joint is substantially the same as that of the first joint, and will not be described in detail.

[0025] like Figure 2 and Figure 3 As shown, one end of the first hollow rod 6 is fixedly connected to the first ball cap 3, and the other end of the first hollow rod 6 is bent to form a first bent portion 25, and the first hollow rod 6 is made of a polymer material. One end of the second hollow rod 11 is fixedly connected to the second ball cap 23, and the other end of the second hollow rod 11 is bent to form a second bent portion 26, and the second hollow rod 11 is made of a polymer material.

[0026] like Figure 3 As shown, the third joint includes a sleeve 8, a fastening nut 9, a first axially inclined slider 13, and a second axially inclined slider 10. A boss extending outward is provided in the middle portion of the outer side of the sleeve 8. The two ends of the sleeve 8 are respectively sleeved with the first bending portion 25 and the second bending portion 26. The first axially inclined slider 13 and the second axially inclined slider 10 are respectively located in the first bending portion 25 and the second axially inclined slider 26. The first axially inclined slider 13 is provided with a threaded rod extending axially along the first bending portion 25. The threaded rod passes through the sleeve 8 and the second axially inclined slider 10 and is threadedly connected with the fastening nut 9, so that the fastening nut 9 is against the second axially inclined slider 10.

[0027] One end of the first push rod 5 is close to the first ball head 2, and the other end of the first push rod 5 is close to the first shaft inclined slider 13. The first push rod 5 has an inclined surface matched with the first shaft inclined slider 13. When the fastening nut 9 is tightened, the threaded rod moves under the drive of the fastening nut 9. Since the first push rod 5 is constrained by the first hollow rod 6, the first ball head 2 can be locked after moving a certain distance along the first hollow rod 6 toward the first ball head 2.

[0028] One end of the second push rod 12 is close to the second ball head 22, and the other end of the second push rod 12 is close to the second shaft-slanted slider 10. The second push rod 12 has an inclined surface that matches the second shaft-slanted slider 10. When the fastening nut 9 is tightened, the fastening nut 9 presses the second shaft-slanted slider 10 to move, and the second push rod 12 is constrained by the second hollow rod 11. Therefore, after the second shaft-slanted slider 10 drives the second push rod 12 to move a certain distance toward the second ball head 22, the second ball head 22 can be locked.

[0029] As can be seen from the above, the fastening nut 9 is in a locked state. At this time, the fastening nut 9 compresses the second shaft inclined slider 10 to drive the second push rod 12 to press against the second ball head 22. At the same time, the fastening nut 9 drives the first shaft inclined slider 13 through the threaded rod to drive the first push rod 5 to press against the first ball head 2. In this embodiment, by tightening the fastening nut 9, the first push rod 5 and the second push rod 12 are driven to press against the first ball head 2 and the second ball head 22 respectively. Loosening the fastening nut 9 can release the first ball head 2 and the second ball head 22 to adjust the angle and position of the ablation needle 14. Only one fastening nut 9 is required to tighten or loosen the structure, which is convenient to operate and can effectively improve work efficiency.

[0030] This embodiment can also be improved as follows:

[0031] 1) If Figure 2 As shown, the inner side of the first ball cap 3 is provided with an annular first limiting groove, and the first hollow rod 6 is provided with a first limiting ring 7 matched with the first limiting groove; the first hollow rod 6 is made of medical polymer material. When the fastening nut 9 is in a locked state, when the first shaft inclined slider 13 drives the first push rod 5 to press against the first bending portion 25, the first shaft inclined slider 13 applies a certain force to the first bending portion 25 in the reverse direction. Since the first hollow rod 6 has a certain elasticity, the first limiting ring 7 on the first hollow rod 6 presses against the first limiting groove. Preferably, the first ball cap 3 is provided with a first ball cap base 4 screwed thereto, and the first limiting groove is located between the first ball cap 3 and the first ball cap base 4.

[0032] Furthermore, the inner side of the second ball cap 23 is provided with an annular second limiting groove, and the second hollow rod 11 is provided with a second limiting ring matched with the second limiting groove; the second hollow rod 11 is made of medical polymer material, and when the fastening nut 9 is in a locked state, the second shaft inclined slider 10 drives the second push rod 12 to press against the second bending portion 26, so that the second limiting ring on the second hollow rod 11 presses against the second limiting groove, and its principle is the same as the principle of the first limiting ring 7 pressing against the first limiting groove. Preferably, the second ball cap 23 is provided with a second ball cap base 24 screwed thereto, and the second limiting groove is located between the second ball cap 23 and the second ball cap base 24.

[0033] 2) If Figure 4 As shown, the chuck includes a clamping seat 15 fixedly connected to the second ball head 22, the clamping seat 15 is provided with a groove and a push block 17 matched with the groove, the push block 17 is provided with a clamping groove 20 for the ablation needle 14 to pass through; the clamping seat 15 is provided with a clamping screw 16, the push block 17 is provided with a through hole 21 corresponding to the clamping screw 16, and the clamping screw 16 has a clamping state of passing through the through hole 21 and entering the clamping groove 20. Through the above improvement, when in use, the ablation needle 14 is placed in the clamping groove 20, and the clamping screw 16 enters the clamping groove 20 from the through hole 21 to abut against the ablation needle 14 so that the ablation needle 14 is fixed on the clamping seat 15. This embodiment adopts an adjustable clamping seat 15, which can meet the needs of ablation needles of various models.

[0034] Preferably, a cover plate 18 is provided on the push block 17, and the cover plate 18 is detachably connected to the push block 17 via a snap-fit ​​structure.

Claims

1. An auxiliary fixation device for an ablation needle, characterized in that: It comprises a base, a first joint, a second joint, a third joint, a first hollow rod, a second hollow rod and a chuck, wherein a first push rod is arranged in the first hollow rod, and a second push rod is arranged in the second hollow rod; The first joint comprises a first ball head and a first ball head cap, and the first ball head is fixedly connected to the base; The second joint comprises a second ball head and a second ball head cap, and the second ball head is fixedly connected to the chuck; One end of the first hollow rod is fixedly connected to the first ball cap, and the other end of the first hollow rod is bent to form a first bent portion; one end of the second hollow rod is fixedly connected to the second ball cap, and the other end of the second hollow rod is bent to form a second bent portion; The third joint comprises a sleeve, a fastening nut, a first axially inclined slider, and a second axially inclined slider. A boss extending outward is provided at the middle portion of the outer side of the sleeve. Both ends of the sleeve are respectively sleeved with the first bending portion and the second bending portion. The first axially inclined slider and the second axially inclined slider are respectively located in the first bending portion and the second bending portion. The first axially inclined slider is provided with a threaded rod extending axially along the first bending portion. The threaded rod passes through the sleeve and the second axially inclined slider and is threadedly connected with the fastening nut so that the fastening nut abuts against the second axially inclined slider. One end of the first push rod is close to the first ball head, and the other end of the first push rod is close to the first shaft inclined slider. The first push rod has an inclined surface matched with the first shaft inclined slider. One end of the second push rod is close to the second ball head, and the other end of the second push rod is close to the second shaft inclined slider. The second push rod has an inclined surface matched with the second shaft inclined slider. The fastening nut is in a locked state, at which time the fastening nut compresses the second shaft inclined slider to drive the second push rod to press against the second ball head. At the same time, the fastening nut drives the first shaft inclined slider to drive the first push rod to press against the first ball head through the threaded rod.

2. The ablation needle auxiliary fixation device according to claim 1, characterized in that: A first annular limiting groove is provided on the inner side of the first ball cap, and a first limiting ring matching the first limiting groove is provided on the first hollow rod, and the first hollow rod is made of medical polymer material; when the fastening nut is in a locked state, the first shaft inclined sliding block drives the first push rod to press against the first bending portion, so that the first limiting ring on the first hollow rod presses against the first limiting groove.

3. The ablation needle auxiliary fixation device according to claim 1 or 2, characterized in that: A second annular limiting groove is provided on the inner side of the second ball cap, and a second limiting ring matching the second limiting groove is provided on the second hollow rod, and the second hollow rod is made of medical polymer material; when the fastening nut is in a locked state, the second shaft inclined sliding block drives the second push rod to press against the second bending portion, so that the second limiting ring on the second hollow rod presses against the second limiting groove.

4. The ablation needle auxiliary fixation device according to claim 2, characterized in that: The first ball cap is provided with a first ball base screwed thereto, and the first limiting groove is located between the first ball cap and the first ball base.

5. The ablation needle auxiliary fixation device according to claim 3, characterized in that: The second ball cap is provided with a second ball base screwed thereto, and the second limiting groove is located between the second ball cap and the second ball base.

6. The ablation needle auxiliary fixation device according to claim 1 or 2, characterized in that: The chuck includes a clamping seat fixedly connected to the second ball head, the clamping seat is provided with a groove and a push block cooperating with the groove, the push block is provided with a clamping groove for the ablation needle to pass through; the clamping seat is provided with a clamping screw, the push block is provided with a through hole corresponding to the clamping screw, and the clamping screw has a clamping state of passing through the through hole into the clamping groove.

7. The ablation needle auxiliary fixation device according to claim 6, characterized in that: A cover plate is arranged on the pushing block.

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