Radiofrequency ablation electrode needle

Abstract

The utility model relates to the technical field of medical instruments, and provides a radiofrequency ablation electrode needle which comprises a handle, a guide needle seat movably arranged on the handle and a connecting structure arranged on the guide needle seat and used for connecting the handle and the guide needle seat, the connecting structure comprises a clamping piece, the clamping piece is provided with an elastic body, and a certain included angle is formed between the elastic body and the clamping piece. The handle is provided with a clamping groove, the clamping groove is provided with a limiting groove corresponding to the elastic body, and the clamping piece is matched with the clamping groove, and the elastic body is in elastic clamping connection with the limiting groove, so that the handle is connected with the guide needle seat. According to the utility model, the handle part and the guide needle seat part are designed in a split manner and are connected through the connecting structure, so that the handle and the guide needle seat are quickly inserted and kept in a locking state, and when one part is damaged, the part is convenient to replace, thereby ensuring that the injection electrode needle can be normally used.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical apparatus and instruments, in particular to a radiofrequency ablation electrode needle. BACKGROUND

[0002] Radiofrequency ablation technology provides a new treatment approach for clinicians and patients due to its small trauma, fast recovery, few complications and remarkable curative effect, and has been applied at home and abroad. The radiofrequency ablation electrode needle used in radiofrequency ablation technology, such as a single-pole multi-needle, performs well in the clinical treatment of solid tumors.

[0003] At present, the existing radiofrequency ablation electrode needle handle and guide needle seat are adhesively connected and do not have a disassembly function, so that when one of the electrode needle handle and the guide needle seat is damaged, the radiofrequency ablation electrode needle cannot be used, which has limitations in use and also increases the use cost. In addition, the existing radiofrequency ablation electrode needle does not have the function of performing surgery on different depth tissues, and different lengths of electrode needles need to be replaced according to the depth, thereby reducing the working efficiency of the radiofrequency ablation electrode needle. Therefore, the above problems need to be improved and developed. SUMMARY

[0004] The utility model provides a kind of radiofrequency ablation electrode needle, when one component is damaged, it is convenient to replace it, so as to ensure that injection electrode needle can be used normally, specific implementation mode is as follows:

[0005] A radiofrequency ablation electrode needle, comprising a handle, a guide needle seat movably arranged on the handle, and a connecting structure arranged on the guide needle seat and used for connecting the handle and the guide needle seat, the connecting structure comprises a clamping piece, the clamping piece has an elastic body, the elastic body and the clamping piece form a certain angle, the handle is provided with a clamping groove, the clamping groove is provided with a limiting groove corresponding to the elastic body, and the clamping piece is matched with the clamping groove, and the elastic body is elastically clamped with the limiting groove in a state, to realize the connection of the handle and the guide needle seat.

[0006] As a further scheme of the utility model, the elastic body is in a ring structure, and the elastic body is axially arranged on the outer wall of the clamping piece.

[0007] As a further scheme of the utility model, the angle is α, and the angle α formed by the clamping piece and the elastic body is in the range of 15°-20°.

[0008] As a further scheme of the utility model, a guide needle is axially sleeved in the guide needle seat, and the clamping piece is arranged between the guide needle seat and the guide needle.

[0009] As a further scheme of the utility model, the clamping piece is detachably arranged on the guide needle seat, an installation groove is formed between the guide needle and the guide needle seat, and the clamping piece is axially arranged in the installation groove.

[0010] As a further scheme of the utility model, the guide needle is provided with a limiting groove, the clamping piece is provided with a clamping block corresponding to the limiting groove, the clamping block is arranged in the limiting groove, and the outer wall of the clamping piece abuts on the guide needle base.

[0011] As a further scheme of the utility model, the handle is respectively provided with a first transition arc and a second transition arc corresponding to the elastic body, the first transition arc is arranged on the groove wall of the limiting groove, and the second transition arc is arranged on the groove wall of the clamping groove.

[0012] As a further scheme of the utility model, the clamping piece is provided with a third transition arc, and the third transition arc is arranged on the outer edge of the elastic body relative to the second transition arc.

[0013] As a further scheme of the utility model, the adjusting mechanism is further arranged on the handle, the adjusting mechanism comprises a control outer cylinder rotationally connected with the handle, a screwing inner cylinder arranged on the control outer cylinder, and a threaded sleeve sleeved on the screwing inner cylinder and rotationally connected with the guide needle, and the screwing inner cylinder is in threaded connection with the threaded sleeve.

[0014] As a further scheme of the utility model, the handle is provided with a guide groove, the guide needle is provided with a sliding block corresponding to the guide groove, and the sliding block is arranged in the guide groove and can slide along the guide groove.

[0015] Due to the adoption of the above technical scheme, the utility model has the beneficial technical effects that:

[0016] 1. The handle part and the guide needle base part of the utility model are designed in a split type, are connected through a connecting structure, the handle and the guide needle base are quickly plugged and connected and kept in a locked state, one part is convenient to replace when damaged, so that the injection electrode needle can be normally used;

[0017] 2. The utility model is connected through the clamping piece inserted into the clamping groove, the elastic body is elastically clamped in the limiting groove, so that the connection between the guide needle base and the handle is more compact, and the connection stability is improved;

[0018] 3. The utility model has the advantages of simple and compact structure, convenient operation, the adjusting mechanism is arranged, the radio frequency electrode needle has the function of length adjustment of the working end of the radio frequency electrode needle in the surgical process, so that more accurate and convenient surgical treatment is realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of a radio frequency ablation electrode needle in the embodiment of the utility model;

[0020] Figure 2It is a sectional view of a radio frequency ablation electrode needle in the embodiment of the utility model;

[0021] Figure 3 It is the utility model Figure 2 The structure enlarged view of A part in the embodiment of the utility model;

[0022] Figure 4 It is the utility model Figure 2 The structure enlarged view of B part in the embodiment of the utility model;

[0023] Figure 5 It is the local schematic view of the guide needle seat in the embodiment of the utility model;

[0024] Figure 6 It is the local schematic view of the handle in the embodiment of the utility model;

[0025] Figure 7 It is the local schematic view of a radio frequency ablation electrode needle in the embodiment of the utility model.

[0026] Explanation of reference signs:

[0027] 1, handle, 2, guide needle, 3, guide needle seat, 4, adjusting mechanism, 5, needle tube main body, 6, clamping piece,

[0028] 11, clamping groove, 12, limiting recess, 13, first transition arc, 14, second transition arc, 15, guide groove,

[0029] 21, installation groove,

[0030] 41, threaded sleeve, 42, screwing inner cylinder, 43, control outer cylinder, 44, clamping key, 45, control hand wheel, 46, rotating ring,

[0031] 431, clamping key groove,

[0032] 51, sliding block,

[0033] 61, elastomer, 62, third transition arc, 63, clamping block. Specific embodiments

[0034] The specific embodiment of the utility model is described below in combination with the drawings and embodiments:

[0035] It should be noted that the structure, proportion, size, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and are not used to limit the implementation conditions of the utility model. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that the utility model can produce, should still fall within the scope covered by the technical content disclosed by the utility model.

[0036] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in the present specification are merely for clear understanding of the description, and are not intended to limit the scope of the present application, and the change or adjustment of the relative relationship without substantial change of the technical content is also regarded as the scope of the present application.

[0037] Embodiment 1, in combination Figures 1 to 7 As shown in the drawings, the embodiment provides a radio frequency ablation electrode needle, which comprises a handle 1, a guide needle seat 3 movably arranged on the handle 1, and a connecting structure arranged on the guide needle seat 3 and used for connecting the handle 1 and the guide needle seat 3. The connecting structure comprises a clamping piece 6, the clamping piece 6 has an elastic body 61, the elastic body 61 forms a certain angle with the clamping piece 6, the handle 1 is provided with a clamping groove 11, the clamping groove 11 is provided with a limiting groove 12 corresponding to the elastic body 61, and the clamping piece 6 is matched with the clamping groove 11 and the elastic body 61 is elastically clamped in the limiting groove 12 in the state, so as to realize the connection between the handle 1 and the guide needle seat 3.

[0038] In specific application, the guide needle seat 3 is axially aligned with the handle 1, the guide needle seat 3 moves towards the handle 1, when the clamping piece 6 contacts the notch of the clamping groove 11, the operator applies a force to the guide needle seat 3, the elastic body 61 abuts against the groove wall of the clamping groove 11, at the same time, the elastic body 61 deforms, so that the angle between the elastic body 61 and the clamping piece 6 is reduced, the guide needle seat 3 moves towards the bottom of the clamping groove 11, the elastic body 61 rebounds and is clamped in the limiting groove 12, so as to realize the elastic clamping of the clamping piece 6 and the clamping groove 11, and further realize the connection between the guide needle seat 3 and the handle 1, which is convenient and fast.

[0039] Specifically, the elastic body 61 has a ring structure, and the elastic body 61 is axially arranged on the outer wall of the clamping piece 6. The elastic body 61 is arranged at the bottom end of the clamping piece 6, the top end of the elastic body 61 is connected with the clamping piece 6, and the bottom end of the elastic body 61 forms a certain angle with the clamping piece 6. When the elastic body 61 is extruded, the angle between the elastic body 61 and the clamping piece 6 is reduced. When the elastic body 61 loses external force, the elastic body 61 rebounds, so that the angle returns to the normal state.

[0040] Specifically, the angle is α, the angle α between the clamping piece 6 and the elastic body 61 is in the range of 15°-20°. Preferably, the angle α between the clamping piece 6 and the elastic body 61 is set to 18°. When the angle α is 18°, the elastic body 61 is more quickly inserted into the clamping groove 11, the elastic body 61 rebounds well, so that the connection between the clamping piece 6 and the clamping groove 11 is more stable, thereby improving the stability of the connection between the guide needle seat 3 and the handle 1.

[0041] Specifically, the guide needle 2 is axially sleeved in the guide needle seat 3, and the clamping piece 6 is arranged between the guide needle seat 3 and the guide needle 2. The clamping piece 6 is detachably arranged on the guide needle seat 3, an installation groove 21 is formed between the guide needle 2 and the guide needle seat 3, and the clamping piece 6 is arranged in the installation groove 21 in an axial direction. The inner wall of the clamping piece 6 is connected with the guide needle 2 in a matched mode, and the outer wall of the clamping piece 6 abuts against the guide needle seat 3, so that the connection between the clamping piece 6 and the guide needle seat 3 and the guide needle 2 is realized.

[0042] For example, the inner wall of the clamping piece 6 is connected with the guide needle 2 in a matched mode, that is, a limiting groove is formed on the guide needle 2, the clamping piece 6 is provided with a clamping block 63 corresponding to the limiting groove, the clamping block 63 is arranged in the limiting groove, and the outer wall of the clamping piece 6 abuts against the guide needle seat 3. The four clamping blocks 63 are arranged at equal intervals in the circumferential direction of the clamping piece 6, the guide needle 2 is provided with a limiting groove corresponding to the clamping block 63, the clamping block 63 is arranged in the limiting groove, and at the same time, the outer wall of the clamping piece 6 is arranged in an interference fit with the guide needle seat 3, so that the connection between the guide needle seat 3, the guide needle 2 and the clamping piece 6 is more stable.

[0043] Preferably, in order to enable the elastic body 61 to be quickly assembled with the clamping groove 11, the handle 1 is provided with a first transition arc 13 and a second transition arc 14 corresponding to the elastic body 61, the first transition arc 13 is arranged on the groove wall of the limiting groove 12, and the second transition arc 14 is arranged on the groove wall of the clamping groove 11. When the clamping piece 6 is inserted into the clamping groove 11, the second transition arc 14 can guide the elastic body 61 into the clamping groove 11; when the clamping piece 6 is separated from the clamping groove 11, the third transition arc 62 can guide the elastic body 61 out of the clamping groove 11.

[0044] Preferably, the clamping piece 8 is provided with a third transition arc 62, the third transition arc 62 is arranged on the outer edge of the elastic body 61 relative to the second transition arc 14. When the clamping piece 6 is matched with the clamping groove 11, the third transition arc 62 abuts against the second transition arc 14, the operator applies a force to the guide needle seat 3, so that the elastic body 61 enters the clamping groove 11, thereby realizing the matched connection between the clamping piece 6 and the clamping groove 11.

[0045] Specifically, the radio frequency ablation electrode needle further comprises an adjusting mechanism 4 arranged on the handle 1, the adjusting mechanism 4 comprises a control outer cylinder 43 rotationally connected with the handle 1, a screwing inner cylinder 42 arranged on the control outer cylinder 43, and a threaded sleeve 41 sleeved on the screwing inner cylinder 42 and rotationally connected with the guide needle 2, and the screwing inner cylinder 42 is threadedly connected with the threaded sleeve 41. The bottom of the control outer cylinder 43 is provided with a control hand wheel 45 for driving the rotation of the control outer cylinder 43, and the control hand wheel 45 is axially arranged at the bottom of the handle 1. Rotating the control hand wheel 45 drives the control outer cylinder 43 to rotate, the control outer cylinder 43 drives the screwing inner cylinder 42 to rotate, and the threaded sleeve 41 threadedly connected with the screwing inner cylinder 42 drives the guide needle 2 to move towards the top end of the handle 1, so as to realize the adjustment of the length of the guide needle 2.

[0046] Specifically, the guide needle 2 comprises a needle tube body 5, the bottom end of the needle tube body 5 is rotationally arranged in the threaded sleeve 41, and a rotating ring 46 is arranged between the threaded sleeve 41 and the needle tube body 5, so that the threaded sleeve 41 and the needle tube body 5 are rotationally connected, to prevent the outer wall of the needle tube body 5 from being damaged due to friction with the threaded sleeve 41. In order to prevent the needle tube body 5 from rotating when moving, a guide groove 15 is formed in the handle 1, the guide needle 2 is provided with a sliding block 51 corresponding to the guide groove 15, and the sliding block 51 is arranged in the guide groove 15 and can slide along the guide groove 15. Thus, the needle tube body 5 is prevented from rotating synchronously with the threaded sleeve 41 during the rotation of the threaded sleeve 41.

[0047] Exemplarily, the screwing inner cylinder 42 and the control outer cylinder 43 are connected through the cooperation of the clamping key 44 and the clamping key groove 431, the clamping key groove 431 is respectively formed in the screwing inner cylinder 42 and the control outer cylinder 43, to form a space for accommodating the clamping key 44, and the clamping key 44 is arranged in the space, so as to realize the assembly of the screwing inner cylinder 42 and the control outer cylinder 43.

[0048] The working principle of the utility model is shown in the drawings Figure 1 As shown in the drawings, the medical staff first connects the guide needle seat 3 with the handle 1 in cooperation, moves the guide needle seat 3 towards the handle 1, exerts force on the guide needle seat 3 when the clamping piece 6 contacts the notch of the clamping groove 11, the elastic body 61 abuts against the groove wall of the clamping groove 11, at the same time, the elastic body 61 deforms, the included angle between the elastic body 61 and the clamping piece 6 is reduced, the guide needle seat 3 moves towards the groove bottom of the clamping groove 11, the elastic body 61 rebounds and is clamped in the limiting groove 12, so as to realize the connection between the guide needle seat 3 and the handle 1.

[0049] In clinical use, first, the electrode needle liquid channel is emptied, the electrode needle is inserted, puncture positioning is completed, and the treatment liquid is injected into the injection port of the guide needle base 3. During the operation, when the length of the electrode needle needs to be adjusted, the medical staff hold the control hand wheel 45 and the handle 1 respectively, rotate the control hand wheel 45, drive the control outer cylinder 43 to rotate, drive the control inner cylinder 42 to rotate, drive the threaded sleeve 41 connected with the control inner cylinder 42 to move the guide needle 2 to the top end of the handle 1, so as to realize the length adjustment of the guide needle 2, and further achieve the purpose of length adjustment of the radiofrequency ablation electrode needle.

[0050] Many other changes and modifications can be made without departing from the spirit and scope of the present application. It is to be understood that the present application is not limited to the specific embodiments described herein, but only by the claims made and their equivalents.

Claims

1. A radio frequency ablation electrode needle, characterized in that, The utility model relates to a needle guide device, including handle (1), the needle guide base (3) of movable setting in handle (1) on, and the connecting structure for connecting handle (1) and needle guide base (3) are set up in needle guide base (3), the connecting structure includes the clamping piece (6), the clamping piece has the elastic body (61), the elastic body (61) with clamping piece (6) form certain angle, handle (1) is seted up with the clamping groove (11), the clamping groove (11) is seted up with the limiting recess (12) corresponding elastic body (61), clamping piece (6) with clamping groove (11) cooperation, and the elastic body (61) with limiting recess (12) elastic clamping state is used for realizing the connection of handle (1) and needle guide base (3).

2. The radio frequency ablation electrode needle of claim 1, wherein, The elastic body (61) is annular structure, and the elastic body (61) is axially arranged on the outer wall of the clamping piece (6).

3. The radio frequency ablation electrode needle of claim 1, wherein, The angle is alpha, and the angle alpha formed by the clamping piece (6) and the elastic body (61) is between 15°-20°.

4. The radio frequency ablation electrode needle of claim 1, wherein, The needle guide base (3) is axially sleeved with the guide needle (2), and the clamping piece (6) is arranged between the needle guide base (3) and the guide needle (2).

5. The radio frequency ablation electrode needle of claim 4, wherein, The clamping piece (6) is detachably arranged on the needle guide base (3), and the mounting groove (21) is formed between the guide needle (2) and the needle guide base (3).

6. The radio frequency ablation electrode needle of claim 5, wherein, The guide needle (2) is provided with a limiting groove, the clamping piece (6) is provided with a clamping block (63) corresponding to the limiting groove, the clamping block (63) is arranged in the limiting groove, and the outer wall of the clamping piece (6) abuts against the needle guide base (3).

7. The radio frequency ablation electrode needle of claim 1, wherein, The handle (1) is provided with a first transition arc (13) and a second transition arc (14) corresponding to the elastic body (61), the first transition arc (13) is arranged on the groove wall of the limiting recess (12), and the second transition arc (14) is arranged on the groove wall of the clamping groove (11).

8. The radio frequency ablation electrode needle of claim 7, wherein, The clamping piece (6) is provided with a third transition arc (62) on the outer edge of the elastic body (61) opposite to the second transition arc (14).

9. The radio frequency ablation electrode needle of claim 1, wherein, Further comprising an adjusting mechanism (4), the adjusting mechanism is arranged on the handle (1), the adjusting mechanism (4) includes a control outer cylinder (43) rotationally connected with the handle (1), a screwing inner cylinder (42) arranged on the control outer cylinder (43), and a threaded sleeve (41) sleeved on the screwing inner cylinder (42) and rotationally connected with the guide needle (2), and the screwing inner cylinder (42) is threadedly connected with the threaded sleeve (41).

10. A radio frequency ablation electrode needle according to any one of claims 4 or 9, characterized in that, The handle (1) is provided with a guide groove (15), the guide needle (2) is provided with a sliding block (51) corresponding to the guide groove (15), the sliding block (51) is arranged in the guide groove (15) and can slide along the guide groove (15).

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