Ablation needle tube assembly and ablation device
By designing an ablation syringe assembly with a deformation part, the problems of limited ablation range and long surgical time in the prior art are solved, and a larger range of ablation and more efficient ablation process are achieved.
Patent Information
- Application Number
- CN202421001932.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The electrode shapes of the existing percutaneous ablation technology are mostly needle-shaped, with limited ablation range and require multiple ablations, resulting in a long operation time.
An ablation needle tube assembly is designed, including an ablation needle tube and a traction rope. The distal end of the ablation needle tube is provided with a needle tip, and a deformation part is arranged near the needle tip. The deformation part forms an expansion structure under the action of external force, and the insulating layer extends from the proximal end. To the deformation part, the developing scale mark is used to determine the needle depth.
Through the expanded structure of the deformation part, a larger range of ablation is achieved, the number of repeated punctures is reduced, the ablation efficiency is improved, and the accuracy of puncture operation is improved through the development scale marking and limiting parts.
Smart Images
Figure CN222516975U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an ablation needle tube assembly and an ablation device. Background Art
[0002] Because traditional ablation technology uses temperature ablation, tumors close to important tissues such as the gastrointestinal tract, bile duct, urethra, and nerves become ablation restricted areas, and large blood vessels also affect the efficacy due to the heat sink effect. As a new treatment method, irreversible electroporation ablation technology, the only non-thermal ablation treatment technology, avoids the embarrassment of irreversible damage to adjacent tissue structures and the "heat sink effect" during surgery.
[0003] In the clinical treatment method of tumors using irreversible electroporation technology, electric pulses are used to ablate biological tissues. Electric field pulses are sent to target cells to cause ions inside and outside the cells to move and gather on both sides of the outer membrane, causing a sharp change in transmembrane potential. The cells undergo irreversible electroporation, breaking the balance inside and outside the cells and ultimately causing cell death. The medical device used to deliver therapeutic energy (such as electric pulses) to tissues includes one or more electrodes and a pulse generator. The pulse generator allows the electrodes to transfer therapeutic energy to the target tissue, thereby causing ablation of the tissue. During the treatment process, it is expected that the electrodes can ensure that the energy transfer reaches the tumor location that needs to be ablated, and the ablation size and direction achieve the best effect.
[0004] The electrodes of existing percutaneous ablation technology are mostly needle-shaped, with a limited ablation range and the need for multiple ablations, resulting in a long surgical procedure; therefore, improvements are needed. Utility Model Content
[0005] In order to solve the above problems in the prior art, the utility model provides an ablation needle tube assembly and an ablation device, which are easy to operate and highly practical.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] As one aspect of the present invention, an ablation needle tube assembly is provided, comprising:
[0008] An ablation needle tube has a first channel, a needle tip is provided at the distal end of the ablation needle tube, a deformation portion is provided near the needle tip, and the deformation portion can form an expanded structure and maintain this state under the action of an external force; an insulating layer is provided on the outer surface of the ablation needle tube, and the insulating layer extends from the proximal end of the ablation needle tube to the distal end to one end of the deformation portion, so that the deformation portion and the needle tip are exposed to form an effective discharge length; and
[0009] A traction rope is arranged in the first channel of the ablation needle tube, one end of the traction rope is connected to the needle tip, and the other end of the traction rope extends out of the proximal end of the ablation needle tube.
[0010] In some embodiments, the ablation needle tube is made of a thermal alloy material.
[0011] In some embodiments, the deformation portion includes a plurality of first through grooves opened along the length direction of the ablation needle tube, and the plurality of first through grooves penetrate the wall of the ablation needle tube, wherein a deformation strip is formed between two adjacent first through grooves.
[0012] In some embodiments, a plurality of the first through grooves are evenly distributed around the central axis of the ablation needle tube.
[0013] In some embodiments, it further includes developing scale marks, which are evenly spaced on the outer surface of the insulating layer.
[0014] In some embodiments, there are two traction ropes, the two traction ropes are symmetrically arranged along the central axis of the ablation needle tube, and the distance between the two traction ropes is the same as the inner diameter of the ablation needle tube.
[0015] In some embodiments, the present invention further provides an ablation device, comprising:
[0016] Control handle;
[0017] The ablation needle tube assembly as described in any one of the above embodiments, wherein the proximal end of the ablation needle tube assembly is connected to the control handle;
[0018] A connector, one end of which is electrically connected to the proximal end of the ablation needle tube, and the other end of which is connected to the energy generator;
[0019] A knob is rotatably arranged on the control handle, and one end of the traction rope close to the proximal end of the ablation needle tube is connected to the knob.
[0020] In some embodiments, the knob is located inside the control handle and is provided with a first wire taking-up groove and a second wire taking-up groove, one end of the two traction ropes are respectively provided in the first wire taking-up groove and the second wire taking-up groove, and the winding directions of the two traction ropes are the same.
[0021] In some embodiments, the distance between the first wire collection groove and the second wire collection groove is equal to the distance between the two traction ropes.
[0022] In some embodiments, a limiting member is further included, and the limiting member is movably disposed on the ablation needle tube assembly.
[0023] Compared with the prior art, the beneficial effects brought by the utility model are as follows: 1. The present application forms an expandable deformation part on the ablation needle tube, so that when subjected to external force, one end of the deformation part is compressed, causing the deformation part to expand like a lantern. The shape of the deformation part of the ablation needle tube is selected according to the actual ablation needs, thereby avoiding repeated punctures and improving ablation efficiency. 2. In order to determine the depth of needle insertion, a visual development ring under CT is added. 3. An identification scale is set on the surface of the insulating layer of the ablation needle tube, and the position is limited in combination with a limiter to improve the accuracy of the puncture operation and avoid excessive puncture. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0025] Figure 1 It is a structural schematic diagram of the ablation needle tube assembly of the utility model;
[0026] Figure 2 This is a structural cross-sectional view of the ablation needle tube assembly of the utility model;
[0027] Figure 3 This is a deformation state diagram of the ablation needle tube assembly of the utility model;
[0028] Figure 4 It is a schematic diagram of the structure of the ablation device of the utility model;
[0029] Figure 5 It is a structural cross-sectional view of the ablation device of the utility model;
[0030] Figure 6 This is a diagram of the use state of the limiter of the utility model;
[0031] Figure 7 for Figure 5 An enlarged schematic diagram of the structure at the connection between the middle traction rope and the knob. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0033] An ablation needle tube assembly according to an embodiment of the present application, such as Figure 1-Figure 3As shown, it comprises: an ablation needle tube 1, which is made of a memory alloy material, is a hollow structure, and has a first channel; a needle tip 11 is formed at the distal end of the ablation needle tube 1 to facilitate puncture operation; wherein, a deformation part is provided at one end of the ablation needle tube 1 close to the needle tip 11; the deformation part can form an expansion structure and maintain this state under the action of external force, and the outer surface of the ablation needle tube 1 is covered with an insulating layer 2, the insulating layer 2 extends from the proximal end of the ablation needle tube 1 to one end of the deformation part, and the insulating layer 2 does not cover the deformation part and the needle tip 11, so that the deformation part is exposed to form an effective discharge length; the insulating layer 2 plays the role of insulating the ablation needle tube 1;
[0034] Specifically, in this embodiment, the insulating layer 2 is connected to the outer surface of the ablation needle tube 1 by hot-melt through an insulating tube, without the need for gluing, and is easy to process; optionally, a portion of the ablation needle tube 1 may be soaked in parylene coating to form the insulating layer 2. It also includes a traction rope 3 for controlling the deformation of the deformation portion. By pulling the traction rope 3, the two ends of the deformation portion are brought close to each other, thereby achieving the expansion of the deformation portion. In this embodiment, there are two traction ropes 3. The traction ropes 3 are symmetrically arranged in the ablation needle tube 1 about the central axis of the ablation needle tube 1, and the spacing between the traction ropes 3 is the same as the inner diameter of the ablation needle tube 1, so as to avoid the deformation portion bending to one side due to uneven force when the traction rope 3 is pulled. One end of the traction rope 3 is connected to the inner wall of the needle tip 11; through external force The traction rope 3 is driven to move toward the proximal end of the ablation needle tube 1, and the traction rope 3 drives the needle tip 11 to move toward the proximal end of the ablation needle tube 1, so that the deformation part is in a deformation state, and the deformation state is spherical, egg-shaped, pumpkin-shaped, elliptical or lantern-shaped, etc.; it should be noted that after the external force of the traction rope 3 is removed, because the ablation needle tube 1 is made of a memory alloy material, in this embodiment, the memory alloy is a nickel-titanium alloy, and the deformation part thereon returns to the initial state, and the initial state is that the diameter of the deformation part is the same as the diameter of the ablation needle tube 1. In this embodiment, the traction rope 3 can be fixed by welding or gluing. Optionally, the traction rope 3 can also be one, and the position of the traction rope 3 needs to be set to coincide with the axis of the ablation needle tube 1.
[0035] Furthermore, the deformation part includes a plurality of first through grooves 12 opened along the length direction of the ablation needle tube 1, and a deformation strip 13 is formed between two adjacent first through grooves 12; in this embodiment, the ablation needle tube is an integrated structure, and a plurality of first through grooves 12 are formed by laser cutting on the ablation needle tube 1, and the plurality of first through grooves 12 are arranged at intervals. Furthermore, in order to make the deformation part evenly stressed in the stress-bearing expansion structure, the first through grooves 12 are evenly distributed around the axis of the ablation needle tube 1.
[0036] In one embodiment, in order to facilitate the operator to confirm the needle insertion depth, a developing scale mark 4 is set on the surface of the insulating layer 2 of the ablation needle tube 1. By setting the developing scale marks 4 with uniform spacing, the operator can check the developing scale marks 4 according to CT development, thereby determining the needle insertion depth, thereby avoiding excessive puncture.
[0037] Another embodiment of the present application is an ablation device, such as Figure 4-Figure 6 As shown, it includes: a control handle 5, the proximal end of the ablation needle tube 1 is connected to the control handle 5; the proximal end of the ablation needle tube 1 is electrically connected to a connector 6, the other end of the connector 6 is connected to an energy generator, and is used to transmit the energy generated by the energy generator to the lesion through the ablation needle tube 1; it should be noted that the structure and working principle of the connector 6 and the energy generator are both existing technologies and will not be repeated;
[0038] The control handle 5 is rotatably connected to a knob 7, and the other end of the traction rope 3 is connected to the knob 7. When the knob 7 is rotated, the knob 7 drives the traction rope 3 to perform corresponding operations, so that the deformation part is in a deformation state or an initial state. It should be noted that the winding directions of the two traction ropes 3 are the same, both are counterclockwise winding or both are clockwise winding.
[0039] In one embodiment, Figure 7 As shown, in order to prevent the two traction ropes 3 from interfering with each other during the storage and release process, a first storage groove 71 and a second storage groove 72 are provided inside the housing of the knob 7 located at the control handle 5, and the two traction ropes 3 are respectively connected to the first storage groove 71 and the second storage groove 72. Furthermore, the spacing between the first storage groove 71 and the second storage groove 72 is the same as the spacing between the two traction ropes 3, so that the two traction ropes 3 are arranged in parallel and parallel to the ablation needle tube 1, further reducing the resistance of the traction rope 3 during the storage or release process.
[0040] In one embodiment, Figure 4-Figure 6As shown, it also includes a limiter 8, which is movably arranged on the ablation needle tube 1; the limiter 8 moves to a preset position on the ablation needle tube 1 to determine the insertion distance of the ablation needle tube 1. During operation, when the lesion tissue is small, a conventional CT scan is performed to determine the puncture layer and puncture point, and the CT cursor measures the shortest distance between the skin needle insertion point and the lesion, the insertion depth and angle of the puncture needle, and the skin is disinfected before puncture, and then a CT scan is performed to confirm that the needle tip is in the lesion, and then the ablation device is connected to the energy generator, and then the energy is stimulated for ablation; similar to the above operation, when the lesion tissue is large, after the needle tip 11 reaches the lesion, the knob 7 is rotated to drive the traction rope 3 to drive the needle tip 11 to move toward the control handle 5, so that the deformation part is compressed into a lantern shape, and then the ablation device is connected to the energy generator, and then the energy is stimulated for ablation. After the ablation is completed, the knob 7 is rotated again to restore the deformation part from the lantern shape to the initial state, and then it is taken out. In this embodiment, when the tumor tissue is small, the required ablation range is small, and there is no need to expand the ablation needle tube 1, and ablation treatment can be performed directly. When the tumor tissue is large, the ablation needle tube 1 is expanded to expand the ablation range. In addition, multiple punctures can be performed to ablate larger tumor tissues, and the puncture position is different each time.
[0041] Furthermore, in order to be able to develop and determine the needle insertion depth under CT, a development mark is added to the ablation needle tube 1, so as to determine the specific location of ablation. First, a CT scan is performed to determine the puncture layer and puncture point, and then the straight-line distance or the shortest distance between the skin needle insertion point and the lesion is measured with a CT cursor to determine the puncture needle insertion depth and angle, and the limiter 8 is pushed to the corresponding scale for limiting. After multiple CT scans are performed to confirm that the needle tip is in the lesion, the connector 6 of the ablation device is connected to the energy generator, and then the energy is stimulated for ablation.
[0042] The above is only a preferred embodiment of the present invention. It should be noted that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.
Claims
1. An ablation needle tube assembly, characterized in that: It includes: An ablation needle tube has a first channel, a needle tip is provided at the distal end of the ablation needle tube, a deformation portion is provided near the needle tip, and the deformation portion can form an expanded structure and maintain this state under the action of an external force; an insulating layer is provided on the outer surface of the ablation needle tube, and the insulating layer extends from the proximal end of the ablation needle tube to one end of the deformation portion, so that the deformation portion and the needle tip are exposed to form an effective discharge length; and A traction rope is arranged in the first channel of the ablation needle tube, one end of the traction rope is connected to the needle tip, and the other end of the traction rope extends out of the proximal end of the ablation needle tube.
2. The ablation needle tube assembly according to claim 1, characterized in that: The ablation needle tube is made of a thermal alloy material.
3. The ablation needle tube assembly according to claim 1, characterized in that: The deformation portion includes a plurality of first through grooves opened along the length direction of the ablation needle tube, and the plurality of first through grooves penetrate through the tube wall of the ablation needle tube, wherein a deformation strip is formed between two adjacent first through grooves.
4. The ablation needle tube assembly according to claim 3, characterized in that: A plurality of the first through grooves are evenly distributed around the central axis of the ablation needle tube.
5. The ablation needle tube assembly according to claim 1, characterized in that: It also includes developing scale marks, which are evenly spaced and arranged on the outer surface of the insulating layer.
6. The ablation needle tube assembly according to claim 1, characterized in that: There are two traction ropes, which are symmetrically arranged along the central axis of the ablation needle tube, and the distance between the two traction ropes is the same as the inner diameter of the ablation needle tube.
7. An ablation device, characterized in that: It includes: Control handle; The ablation needle tube assembly according to any one of claims 1 to 5, wherein the proximal end of the ablation needle tube assembly is connected to the control handle; A connector, one end of which is electrically connected to the proximal end of the ablation needle tube, and the other end of which is connected to the energy generator; A knob is rotatably arranged on the control handle, and one end of the traction rope close to the proximal end of the ablation needle tube is connected to the knob.
8. The ablation device according to claim 7, characterized in that: The knob is located inside the control handle and is provided with a first wire taking-up groove and a second wire taking-up groove. One ends of the two traction ropes are respectively provided in the first wire taking-up groove and the second wire taking-up groove, and the winding directions of the two traction ropes are the same.
9. The ablation device according to claim 8, characterized in that: The distance between the first wire collection groove and the second wire collection groove is equal to the distance between the two traction ropes.
10. The ablation device according to claim 7, characterized in that: It also includes a limiting component, which is movably arranged on the ablation needle tube assembly.