Ablation needle handle device and ablation needle

Abstract

The utility model relates to a handle device of an ablation needle and an ablation needle, and relates to the field of ablation technology. The handle device of the ablation needle of the utility model comprises an insulating sleeve, a handle shell and a rotating assembly, wherein the handle shell comprises a first shell, the rotating assembly is arranged at the proximal side of the first shell, and is rotatably connected to the first shell, and the outer diameter of the rotating assembly is the same as the outer diameter of the first shell; the insulating sleeve passes through the rotating assembly and extends into the first shell, and the insulating sleeve is connected to the rotating assembly, and the rotating assembly is constructed so that when it rotates relative to the first shell, the insulating sleeve moves relative to the first shell, thereby achieving the purpose of controlling the size of the ablation area, wherein the outer diameter of the rotating assembly is the same as the outer diameter of the first shell, so that the handle device has a uniform outer contour and presents a uniform columnar structure as a whole, so that when multiple handle devices are operated at the same time, there will be no minimum distance restriction between the two, so that the application of the handle device is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of ablation, in particular to a handle device of an ablation needle and an ablation needle. Background Art

[0002] When using common tumor ablation treatment methods such as radiofrequency ablation and pulse ablation for ablation treatment, it is generally desired to control the size of the ablation area to accommodate tumor tissues of different sizes. The ablation area can be controlled by, for example, changing the length of the conductive electrode on the ablation needle. For example, a movable insulating sleeve can be covered on the outside of the conductive electrode, and the range of the electric field can be controlled by adjusting the distance between the end of the insulating sleeve and the end of the conductive electrode, thereby achieving control of the ablation range.

[0003] Currently, the common way to move the insulating sleeve, such as by directly pushing the side button, requires a button protruding from the outside of the handle to apply force, which causes the button to occupy the space of the handle, so that when two or more handles are operated at the same time, the minimum distance between them is limited. Utility Model Content

[0004] The utility model provides a handle device of an ablation needle and an ablation needle, which are used to solve at least one of the above-mentioned technical problems.

[0005] According to a first aspect of the utility model, the utility model provides a handle device for an ablation needle, comprising an insulating sleeve, a handle housing and a rotating assembly, wherein the handle housing comprises a first housing, the rotating assembly is arranged at a proximal end side of the first housing and is rotatably connected to the first housing, and the outer diameter of the rotating assembly is the same as the outer diameter of the first housing;

[0006] The proximal side of the insulating sleeve extends to the outside of the needle shaft of the ablation needle, and the distal side of the insulating sleeve extends into the first shell. The rotating assembly is constructed so that when it rotates relative to the first shell, the insulating sleeve moves linearly relative to the first shell.

[0007] In one embodiment, a slider is provided on the rotating assembly, the slider is located inside the first shell and connected to the insulating sleeve, a threaded mating portion is provided on the slider, an internal thread is provided on the inner wall of the first shell, the threaded mating portion is meshed with the internal thread, so that when the rotating assembly and the first shell rotate relative to each other, the slider drives the insulating sleeve to move linearly relative to the first shell.

[0008] In one embodiment, the slider includes a sliding sleeve and a plurality of toothed parts arranged on both sides of the sliding sleeve, each of the toothed parts extends radially along the sliding sleeve, and the toothed parts located on the same side of the sliding sleeve are spaced apart, and the threaded fitting part is constructed as a gap part between the toothed parts located on the same side of the sliding sleeve.

[0009] In one embodiment, the adjacent tooth-shaped members have arc-shaped surfaces on their sides close to each other.

[0010] In one embodiment, the threaded fitting portion is configured as a spiral groove extending spirally along the axial direction of the slider, and the spiral groove is provided with a spiral groove entrance for allowing the internal thread to be screwed in or out.

[0011] In one embodiment, the rotating assembly comprises:

[0012] a knob rotatably connected to the proximal side of the first housing; and

[0013] a connecting column connected to the knob and extending into the interior of the first housing;

[0014] Wherein, the connecting column is provided with a sliding groove extending along its axial direction, the sliding groove penetrates the connecting column in the radial direction, the sliding block is arranged in the sliding groove and can move along the sliding groove.

[0015] In one embodiment, the knob is provided with a limiting groove extending along its circumference, and the inner wall of the first shell is provided with a limiting member extending toward the interior thereof, and the limiting member is arranged in the limiting groove to limit the axial movement of the rotating assembly relative to the first shell.

[0016] In one embodiment, a scale ring is further provided on the slider, and the scale ring moves together with the slider to indicate the moving position of the slider.

[0017] In one embodiment, the handle shell also includes a second shell connected to the distal end of the first shell, the distal end of the first shell is provided with a locking member, the second shell is provided with a locking groove extending along its circumference, the opening of the locking groove has a closing portion protruding toward the interior of the locking groove, and the closing portion is constructed to allow the locking member to enter the locking groove from the closing portion and prevent the locking member from escaping from the locking groove.

[0018] In one embodiment, the second shell is also provided with a connection hole for connecting the needle rod of the ablation needle and an LED light panel for indicating the working status of the ablation needle.

[0019] According to a second aspect of the utility model, the utility model provides an ablation needle, including an ablation needle and a handle device of the ablation needle, wherein the ablation needle includes a needle rod, and the needle rod passes through the insulating sleeve and extends into the handle housing.

[0020] Compared with the prior art, the advantage of the present invention is that the insulating sleeve is driven to move relative to the first shell by the rotation of the rotating component, so as to achieve the purpose of controlling the size of the ablation area, wherein the outer diameter of the rotating component is the same as the outer diameter of the first shell, so that the handle device has a uniform outer contour and presents a uniform columnar structure as a whole. When multiple handle devices are operated at the same time, there will be no minimum distance restriction between the two, which makes the handle device more widely applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0022] Figure 1 is a cross-sectional view of the handle device in Example 1 of the utility model;

[0023] Figure 2 is a three-dimensional structural schematic diagram of the handle device in Embodiment 1 of the present utility model, wherein the interior of the first housing is shown;

[0024] Figure 3 It is a schematic diagram of the cooperation between the first shell and the second shell in the embodiment 1 of the present utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the cooperation between the slider and the sliding groove in the embodiment 1 of the utility model;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the slider in Embodiment 1 of the present utility model;

[0027] Figure 6 It is a three-dimensional structural schematic diagram of the slider in Example 2 of the utility model.

[0028] Reference numerals:

[0029] 1. Needle bar;

[0030] 21. Insulating sleeve; 2. Handle device;

[0031] 22. handle housing; 23. rotating assembly; 24. sealing member; 25. first housing; 26. slider; 27. scale ring; 28. second housing; 29. ​​LED light board;

[0032] 231, first sealing groove; 232, limiting groove; 233, sliding groove; 234, knob; 235, connecting column;

[0033] 251, limiter; 252, internal thread; 253, locking member;

[0034] 261, toothed part; 262, threaded mating part; 263, sliding sleeve; 264, spiral groove entrance;

[0035] 281, shaft hole; 282, locking groove; 283, connecting hole; 284, second sealing groove; 285, closing portion; 2851, first arc-shaped transition portion; 2531, second arc-shaped transition portion. DETAILED DESCRIPTION

[0036] The utility model will be further described below in conjunction with the accompanying drawings.

[0037] Example 1

[0038] like Figure 1 As shown, the handle device 2 of the ablation needle of the present invention is a rotary handle device, which adjusts the effective length of the needle shaft 1 of the ablation needle by rotating, thereby achieving the purpose of controlling the size of the ablation area.

[0039] Specifically, the handle device 2 includes an insulating sleeve 21, a handle housing 22 and a rotating assembly 23. The insulating sleeve 21 is sleeved on the needle shaft 1 of the ablation needle and is made of a polyimide (PI) tube or other non-metallic material, so it can play an insulating role. The distance between the proximal end of the insulating sleeve 21 and the proximal end of the needle shaft 1 is the ablation area corresponding to the ablation needle. By moving the insulating sleeve 21, the relative position between it and the needle shaft 1 is changed, thereby achieving the purpose of adjusting the size of the ablation area.

[0040] Furthermore, the insulating sleeve 21 can be connected to the rotating assembly 23 via a slider 26 on the rotating assembly 23. Therefore, through the rotation of the rotating assembly 23, the insulating sleeve 21 can be linearly moved relative to the handle housing 22. Since the needle rod 1 is fixedly connected to the handle housing 22, when the insulating sleeve 21 moves relative to the handle housing 22, it also moves relative to the needle rod 1, thereby changing the distance between the proximal end of the insulating sleeve 21 and the proximal end of the needle rod 1.

[0041] like Figure 2 As shown, the rotating assembly 23 is arranged on the proximal side of the first shell 25, and the outer diameter of the rotating assembly 23 is the same as the outer diameter of the first shell 25, so that the handle device 2 has a uniform outer contour and presents a uniform columnar structure as a whole. When multiple handle devices 2 are operated at the same time, there will be no minimum distance restriction between the two, which makes the handle device 2 more widely used.

[0042] like Figure 1As shown, the handle housing 22 is constructed as a split structure, for example, the handle housing 22 includes a first housing 25 and a second housing 28 connected to the distal end of the first housing 25, and the two can be connected by various known means, for example, the two can be connected by a rotational fixation. The handle housing 22 with a split structure is easier to achieve uniform external dimensions and is conducive to accommodating components therein.

[0043] The rotating assembly 23 is rotatably connected to the first housing 25. Figure 2 As shown, the rotating assembly 23 includes a knob 234 and a connecting column 235. The knob 234 is configured as a substantially conical structure, and its distal end abuts against the proximal end of the first housing 25 to facilitate holding and applying a rotation torque. The connecting column 235 is configured as a columnar structure, and its sleeve is disposed outside the insulating sleeve 21 and extends into the first housing 25.

[0044] The knob 234 is rotatably connected to the first housing 25. Specifically, Figure 2 As shown, the knob 234 is provided with a limit groove 232 extending along its circumference, and the inner wall of the first shell 25 is provided with a limit member 251 extending toward the interior thereof, and the limit member 251 is arranged in the limit groove 232, thereby limiting the axial movement of the rotating assembly 23 along the first shell 25, so that the knob 234 can only rotate around its axial direction.

[0045] In addition, the knob 234 is disposed at the proximal end of the first shell 25, which is also beneficial to reducing the radial size of the handle assembly, so that there can be a smaller spacing between the various components of the handle device 2, which can improve the operability of the handle assembly.

[0046] The connecting column 235 is also provided with a slider 26. Figure 2 and Figure 4 As shown, the connecting column 235 is provided with a sliding groove 233 extending along its axial direction. The sliding groove 233 penetrates the connecting column 235 in the radial direction. The end of the slider 26 can extend from the sliding groove 233. The sliding groove 233 can act as a guide groove to guide the slider 26 to move therein.

[0047] The slider 26 is sleeved on the outside of the insulating sleeve 21 , and the slider 26 and the insulating sleeve 21 can be fixedly connected by bonding or other means, so that when the slider 26 moves, it can drive the insulating sleeve 21 to move linearly along its axial direction.

[0048] Specifically, the rotating assembly 23, the slider 26 and the first housing 25 can form a screw structure, so that the rotation of the rotating assembly 23 can be converted into a linear motion of the slider 26 and the insulating sleeve 21, thereby adjusting the distance between the proximal end of the insulating sleeve 21 and the proximal end of the needle rod 1. In other words, when the rotating assembly 23 rotates, it can drive the slider 26 to move axially, and the axial movement of the slider 26 will drive the insulating sleeve 21 to move linearly along the axial direction.

[0049] like Figure 4 As shown, an internal thread 252 is provided on the inner wall of the first housing 25. Figure 5 As shown, a threaded fitting portion 262 is provided on the slider 26 , and the threaded fitting portion 262 is meshed with the internal thread 252 . Therefore, when the threaded fitting portion 262 and the internal thread 252 cooperate with each other, the insulating sleeve 21 can move relative to the first housing 25 .

[0050] Furthermore, if Figure 5 As shown, the slider 26 includes a sliding sleeve 263 and a plurality of toothed members 261 disposed on both sides of the sliding sleeve 263. Each toothed member 261 extends in the radial direction of the sliding sleeve 263. The toothed members 261 on both sides of the sliding sleeve 263 are symmetrically disposed about the sliding sleeve 263, and the toothed members 261 on the same side of the sliding sleeve 263 are spaced apart, that is, a gap portion is disposed between the toothed members 261 on the same side of the sliding sleeve 263, and the gap portion is a threaded fitting portion 262. The toothed members 261 on both sides of the sliding sleeve 263 extend out of the sliding groove 233 on the connecting column 235.

[0051] like Figure 4 As shown, the threaded mating portion 262 can be mated with the internal thread 252, and when the knob 234 is subjected to a rotational force, it drives the connecting column 235 to rotate, so that the threaded mating portion 262 of the slider 26 is mated with the internal thread 252 on the first housing 25, thereby performing a spiral motion along the thread. The spiral motion of the slider 26 includes a rotational motion around the axial direction of the insulating sleeve 21 and a translational motion along the axial direction of the insulating sleeve 21, wherein the translational motion of the slider 26 along the axial direction of the insulating sleeve 21 can drive the insulating sleeve 21 to move toward the proximal side or the distal side of the first housing 25.

[0052] To improve the smoothness of the movement of the slider 26 , the toothed parts 261 on the same side of the sleeve 263 have arc surfaces on the sides close to each other (ie, the side close to the threaded fitting portion 262 ), which can make it easier for the threaded fitting portion 262 to mesh with the internal thread 252 .

[0053] Furthermore, if Figure 4As shown, the insulating sleeve 21 is also provided with a scale ring 27, which is located in the threaded fitting portion 262 and has an identification layer or identification portion of a special color (such as red, yellow or green, etc.). When the slider 26 performs a spiral motion, the scale ring 27 can be driven to translate to indicate the moving position of the slider 26, thereby realizing the displacement display of the slider 26.

[0054] The first housing 25 and the second housing 28 are installed by rotation. Figure 3 As shown, a locking member 253 is provided at the distal end of the first housing 25 , and the locking member 253 may be, for example, a locking block.

[0055] The second shell 28 is provided with a locking groove 282 extending along its circumference, and the opening of the locking groove 282 has a closing portion 285 protruding toward the inside of the locking groove 282, and the closing portion 285 is constructed to allow the locking member 253 to enter the locking groove 282 from the closing portion 285 and prevent the locking member 253 from escaping from the locking groove 282.

[0056] like Figure 3 As shown, the closing portion 285 is provided with a first arc-shaped transition portion 2851, which may be a rounded structure on the outside of the closing portion 285. Correspondingly, the locking member 253 is provided with a second arc-shaped transition portion 2531, which may be a rounded structure on the locking member 253. When the locking member 253 is located on the outside of the locking groove 282, the second arc-shaped transition portion 2531 on the locking member 253 is tangent to the first arc-shaped transition portion 2851 on the closing portion 285, so that the locking groove 282 can be slightly deformed, and the locking member 253 can slide into the locking groove 282; on the contrary, after the locking member 253 slides into the locking groove 282, it is blocked by the inner side of the closing portion 285 and will not fall out of the locking groove 282.

[0057] Therefore, when the second shell 28 is inserted into the first shell 25, the distal end of the first shell 25 abuts against the step structure of the second shell 28, and then the second shell 28 is rotated. Under the action of the rotational force, the first arc-shaped transition portion 2851 on the closing portion 285 is tangent to the second arc-shaped transition portion 2531 on the locking member 253, so that the locking groove 282 is slightly deformed, so that the locking member 253 can enter the locking groove 282. When the locking member 253 completely enters the locking groove 282, the closing portion 285 and the locking member 253 no longer interfere with each other and return to a normal state. At this time, the closing portion 285 can fix the locking member 253 in the locking groove 282 and prevent the locking member 253 from escaping from the locking groove 282, so that relative rotation and movement cannot occur between the first shell 25 and the second shell 28, so that the first shell 25 and the second shell 28 are fixedly connected.

[0058] like Figure 3 As shown, the second housing 28 is also provided with a second sealing groove 284, in which a sealing member 24 is provided. Under the action of the sealing member 24, a seal can be achieved between the first housing 25 and the second housing 28. Figure 2 As shown, a first sealing groove 231 is provided on the proximal side of the knob 234 , in which a sealing member 24 may also be provided. Under the action of the sealing member 24 , sealing between the rotating assembly 23 and the first housing 25 is achieved.

[0059] The second housing 28 is also provided with an axial hole 281, whose inner diameter is slightly larger than the diameter of the connecting column 235. The sleeve is provided on the connecting column 235 to provide a restraining force for the connecting column 235 during rotation, to prevent the connecting column 235 from excessive deformation, and to ensure the rotation stability of the rotating assembly 23. The second housing 28 is also provided with a connecting hole 283, in which the distal end of the needle rod 1 can be disposed and bonded to the connecting hole 283, so that the needle rod 1 and the handle device 2 can be fixed, thereby providing a puncture force for the needle rod 1.

[0060] Furthermore, if Figure 2 As shown, the second shell 28 is also provided with an LED light board 29, which can adopt an existing light board structure, for example, a light-emitting portion is provided thereon. An opening is provided at a relative position on the second shell 28, and the light-emitting portion of the LED light board 29 can pass through the second shell 28 and display a light signal to the outside to indicate different working states of the ablation needle.

[0061] Example 2

[0062] The difference between the present embodiment 2 and the above-mentioned embodiment 1 is that the structure of the slider 26 is different, and the connecting column 235 in the embodiment 1 is omitted in the present embodiment 2, that is, the rotating assembly 23 only includes a knob 234, and the knob 234 is connected to the slider 26 to drive the slider 26 to rotate. The insulating sleeve 21 passes through the slider 26 and is connected to the slider 26.

[0063] like Figure 6 As shown, the threaded mating portion 262 is a spiral groove on the slider 26, and the spiral groove extends spirally along the axial direction of the slider 26. And the angle of the spiral groove in the circumferential direction of the slider 26 is between 180 degrees and 360 degrees to ensure its mating with the first housing 25.

[0064] The slider 26 is also provided with a spiral groove inlet 264 connected to the spiral groove, that is, one end of the spiral groove is an open end formed by the spiral groove inlet 264, so that the internal thread 252 on the first housing 25 can be screwed into or out of the spiral groove from the spiral groove inlet 264, and the other end is a closed end, so as to ensure that the slider 26 can achieve spiral motion along the internal thread 252. When the knob 234 drives the connecting column 235 to rotate, the internal thread 252 enters the spiral groove from the spiral groove inlet 264, so that the slider 26 moves, thereby driving the insulating sleeve 21 to move.

[0065] Furthermore, the slide 26 may also be constructed integrally with a scale ring 27 , and the scale ring 27 may indicate the movement position of the slide 26 .

[0066] Example 3

[0067] The present invention also provides an ablation needle, including an ablation needle and a handle device for the ablation needle described in the above embodiments, wherein the ablation needle includes a needle rod 1, the proximal side of the needle rod 1 is a pointed structure for puncturing tissue, and the distal end of the needle rod 1 passes through an insulating sleeve 21 and extends into a handle housing 22. Figure 3 As shown, the distal end of the needle rod 1 extends into the connection hole 283 of the second housing 28 and is fixed to the second housing 28. The distal end of the needle rod 1 can be conductively connected to the output cable for power transmission, so that the proximal end of the needle rod 1 exposed outside the insulating sleeve 21 can be used as an electrode.

[0068] The ablation needle of the present invention may also include other components and elements to achieve its necessary functions, which may adopt various structures and features of the prior art, and the present invention will not elaborate on this.

[0069] It should be noted that the “proximal end” and “proximal side” mentioned in this article refer to the end or side of the needle tip close to the needle shaft, and the “distal end” and “distal side” refer to the end or side of the needle tip away from the needle shaft.

[0070] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A handle device for an ablation needle, characterized in that: The invention comprises an insulating sleeve (21), a handle housing (22) and a rotating assembly (23), wherein the handle housing (22) comprises a first housing (25), the rotating assembly (23) is arranged on the proximal side of the first housing (25) and is rotatably connected to the first housing (25), and the outer diameter of the rotating assembly (23) is the same as the outer diameter of the first housing (25); The proximal side of the insulating sleeve (21) extends to the outside of the needle shaft of the ablation needle, and the distal side of the insulating sleeve (21) extends into the first shell (25). The rotating assembly (23) is constructed so that when it rotates relative to the first shell (25), the insulating sleeve (21) moves linearly relative to the first shell (25).

2. The handle device of the ablation needle according to claim 1, characterized in that: The rotating assembly (23) is provided with a slider (26), the slider (26) is located inside the first shell (25) and connected to the insulating sleeve (21), the slider (26) is provided with a threaded fitting portion (262), an inner thread (252) is provided on the inner wall of the first shell (25), the threaded fitting portion (262) is meshed with the inner thread (252), so that when the rotating assembly (23) and the first shell (25) rotate relative to each other, the slider (26) drives the insulating sleeve (21) to move linearly relative to the first shell (25).

3. The handle device of the ablation needle according to claim 2, characterized in that: The slider (26) comprises a sliding sleeve (263) and a plurality of toothed parts (261) arranged on both sides of the sliding sleeve (263), each of the toothed parts (261) extends radially along the sliding sleeve (263), and the toothed parts (261) located on the same side of the sliding sleeve (263) are arranged at intervals, and the threaded fitting part (262) is constructed as a gap part between the toothed parts (261) located on the same side of the sliding sleeve (263).

4. The handle device of the ablation needle according to claim 3, characterized in that: The adjacent tooth-shaped members (261) have arc-shaped surfaces on their sides close to each other.

5. The handle device of the ablation needle according to claim 2, characterized in that: The threaded fitting portion (262) is configured as a spiral groove (265) extending spirally along the axial direction of the slider (26), and the spiral groove (265) is provided with a spiral groove entrance (264) for allowing the internal thread (252) to be screwed in or out.

6. The handle device of the ablation needle according to any one of claims 2 to 4, characterized in that: The rotating assembly (23) comprises: a knob (234) rotatably connected to the proximal side of the first housing (25); and A connecting column (235) connected to the knob (234) and extending into the interior of the first housing (25); The connecting column (235) is provided with a sliding groove (233) extending along its axial direction, the sliding groove (233) penetrates the connecting column (235) in the radial direction, and the sliding block (26) is arranged in the sliding groove (233) and can move along the sliding groove (233).

7. The handle device of the ablation needle according to claim 6, characterized in that: The knob (234) is provided with a limiting groove (232) extending in its circumferential direction, and the inner wall of the first shell (25) is provided with a limiting member (251) extending toward the inside thereof, and the limiting member (251) is arranged in the limiting groove (232) to limit the axial movement of the rotating assembly (23) relative to the first shell (25).

8. The handle device of the ablation needle according to any one of claims 2 to 5, characterized in that: The slider (26) is also provided with a scale ring (27), and the scale ring (27) moves together with the slider (26) to indicate the moving position of the slider (26).

9. The handle device of the ablation needle according to claim 1, characterized in that: The handle housing (22) further comprises a second housing (28) connected to the distal end of the first housing (25); a locking member (253) is provided at the distal end of the first housing (25); a locking groove (282) extending along its circumference is provided on the second housing (28); an opening of the locking groove (282) comprises a closing portion (285) protruding toward the inside of the locking groove (282); the closing portion (285) is configured to allow the locking member (253) to enter the locking groove (282) from the closing portion (285) and to prevent the locking member (253) from escaping from the locking groove (282).

10. The handle device of the ablation needle according to claim 9, characterized in that: The second shell (28) is also provided with a connection hole (283) for connecting the needle rod (1) of the ablation needle and an LED light board (29) for indicating the working status of the ablation needle.

11. An ablation needle, characterized in that: A handle device comprising an ablation needle and the ablation needle according to any one of claims 1 to 10, wherein the ablation needle comprises a needle shaft (1), wherein the needle shaft (1) passes through the insulating sleeve (21) and extends into the handle housing (22).

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