CN219109719U

CN219109719U - Radio frequency ablation needle combination

Info

Publication number: CN219109719U
Application number: CN202223594180.XU
Authority: CN
Inventors: 王永; 王垦; 温俊滔; 李育
Original assignee: Guangdong Shunde Zhiren Medical Technology Co ltd
Current assignee: Guangdong Shunde Zhiren Medical Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-02
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a radio frequency ablation needle combination, which is technically characterized by comprising a puncture needle tube and an ablation needle inserted into the puncture needle tube, wherein the surface of the puncture needle tube is coated with an electrostatic heat insulation layer, the puncture needle tube comprises a holding seat for the ablation needle to be inserted, and the ablation needle comprises a connecting seat; the needle point inclined plane of the ablation needle and the needle hole inclined plane of the puncture needle tube have the same inclination angle, the side wall of the connecting seat is fixed with a connecting rod protruding out of the side wall of the holding seat, and the connecting rod is fixed with a lug; the lateral wall of the holding seat slides and has the concave block that transversely blocks into the lug in order to restrict the ablation needle to get in and out the puncture needle tube, and the lateral wall of the holding seat is provided with the elastic component that promotes the lug and slide towards the connecting rod, adopts the second grade male ablation needle for can shutoff when the puncture needle tube inserts the human body, make the puncture needle tube reduce to patient's epidermis tissue's wound mouth, make patient puncture back wound reply to promote to some extent.

Description

Radio frequency ablation needle combination

Technical Field

The present utility model relates to medical devices, and more particularly, to a radio frequency ablation needle assembly.

Background

When the current frequency of the radio frequency is high to a certain value (> 100 kHz), the movement of charged ions in the tissue, namely frictional heating (60-100 ℃), is caused. The frequency of the radio frequency ablation equipment is 200-500 kHz, and the output power is 100-400W.

Therefore, in medical data, the puncture needle is used for performing radio frequency ablation treatment at a fixed point on the body of a patient, and the puncture needle is generally used for neuralgia treatment, tumor treatment and the like.

The patent document of CN201520683780.4 is searched, the patent name of the China is a plasma radio frequency ablation puncture trocar combined device, the specification [18] records that when the plasma radio frequency ablation puncture trocar combined device is used, a patient positions the peripheral nerve puncture direction and the skin puncture point under the guidance of X-ray or CT, after marking the skin puncture point, the needle point 21 of the internal radio frequency puncture needle 2 is retracted into the external puncture trocar 1, then the needle point 11 of the external puncture trocar 1 penetrates into the skin through the puncture point, the external puncture trocar 1 is continuously pushed for 1-2cm along the puncture direction, the internal radio frequency puncture needle 2 is pushed to the forefront end along the interior of the external puncture trocar 1, the patent document records that the using method is recorded, the radio frequency needle is retracted into the puncture trocar, and the radio frequency needle is pushed out from the puncture trocar after the puncture of the puncture trocar is completed.

The combination of the puncture needle and the ablation needle in the above patent document has a drawback in use because the needle head of the puncture needle has a large needle hole, which breaks the epidermis of the patient and simultaneously causes human tissues to enter the needle head of the puncture needle, thus causing a wound of the patient after the puncture needle punctures;

because if only the human tissue is scratched, the wound caused by the puncture needle passing through the puncture needle by utilizing the elasticity of the human tissue is smaller, the wound is easy to elastically recover after the puncture needle is pulled out, and the healing speed is higher;

the opening of the puncture needle hole on the surface of the human body is larger, the wound is slower to recover, and the needle hole of the puncture needle cannot be closed because the ablation needle is required to be inserted in the follow-up process of the puncture needle, so that the defect that the radio frequency ablation puncture needle causes a larger wound always exists.

Disclosure of Invention

The utility model aims to provide a radio frequency ablation needle combination, which adopts a secondary inserted ablation needle, so that a puncture needle tube can be plugged when being inserted into a human body, the wound of the puncture needle tube on the epidermal tissue of a patient is reduced, and the wound recovery of the patient after puncture is improved.

The technical aim of the utility model is realized by the following technical scheme:

the radio frequency ablation needle combination comprises a puncture needle tube and an ablation needle inserted into the puncture needle tube, wherein the surface of the puncture needle tube is coated with an electrostatic heat insulation layer, the puncture needle tube comprises a holding seat for the ablation needle to be inserted, and the ablation needle comprises a connecting seat; the needle point inclined plane of the ablation needle and the needle hole inclined plane of the puncture needle tube have the same inclination angle, the side wall of the connecting seat is fixed with a connecting rod protruding out of the side wall of the holding seat, and the connecting rod is fixed with a lug; the side wall of the holding seat slides to be provided with a concave block which is transversely clamped into the convex block to limit the ablation needle to enter and exit the puncture needle tube, and the side wall of the holding seat is provided with an elastic component which pushes the convex block to slide towards the connecting rod; when the convex block is clamped into the concave block, the ablation needle seals the needle hole of the puncture needle tube, the needle tip inclined plane of the ablation needle is smoothly connected with the needle hole of the puncture needle tube, and the joint seat is abutted against the holding seat and has a gap; when the convex block and the concave block are manually separated, the needle tip of the ablation needle extends out of the puncture needle tube, and the connecting seat is abutted against the holding seat.

Preferably, the holding seat is provided with a slide way, the connecting rod is in clearance sliding on the slide way, and the cross section of the connecting rod is rectangular.

Preferably, the elastic component comprises a chute and a sliding block, the sliding block slides in the chute, the chute and the sliding way are vertically arranged, and the concave block is fixed on the sliding block; a cylinder is fixed in the sliding groove, a sliding rod slides in the cylinder, the sliding rod is fixed on the sliding block, and a spring for pushing the sliding rod to move towards the connecting rod is arranged in the cylinder.

Preferably, one end of the slide bar positioned in the cylinder is fixed with a stop block, and the cylinder mouth of the cylinder is fixed with a stop block for stopping the stop block to limit the slide bar from separating from the cylinder.

Preferably, the electrostatic insulating layer is a teflon coating.

Preferably, the Teflon coating is positioned at the needle tip of the puncture needle tube with a gap of 1-3 cm.

Preferably, the top of the connecting seat is provided with an electric connection jack.

In summary, the utility model has the following beneficial effects:

(1) After the convex block and the concave block are clamped, the ablation needle is inserted into the puncture needle tube to form primary positioning, at the moment, the needle hole of the puncture needle tube is blocked, the epidermis puncture action of a patient can be completed, at the moment, the puncture is only performed on the epidermis, and because the needle hole of the puncture needle tube is blocked and does not cut human tissues, the puncture opening is smaller after the puncture is finished, and the patient returns quickly;

(2) The concave block is in sliding movement, so that a doctor can manually stir the position relation between the adjustment and the convex block, push the concave block to separate the convex block from the concave block, and further insert the ablation needle into the puncture needle tube, so that the needle end of the ablation needle extends out of the end of the puncture needle tube, and perform ablation operation.

(3) The elastic component is used for ensuring that when the concave block is clamped to the convex block, the concave block is kept in a clamped state by utilizing the elastic force of the spring under the action of no external force.

(4) The clearance between the Teflon coating and the needle tip of the puncture needle tube is used for ensuring that the needle tip of the puncture needle tube can be ablated after being heated, and the heat of the ablated needle is transferred to the needle tip of the puncture needle tube after being heated.

Drawings

FIG. 1 is an exploded schematic view of both a needle cannula and an ablation needle in an embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a schematic diagram of the connection relationship between the cylinder and the slide bar after the cylinder is broken away in the embodiment;

FIG. 5 is a schematic illustration of the insertion relationship of the needle cannula and the ablation needle after the engagement of the male and female blocks in an embodiment;

fig. 6 is a schematic illustration of the relationship between the ablation needle and the puncture needle tube when the ablation needle is inserted into the deepest part of the puncture needle tube in the embodiment.

In the figure:

1. puncture needle tube; 11. a holding base;

2. an ablation needle; 21. a connecting seat;

3. an electrostatic insulating layer;

41. a connecting rod; 42. a slideway; 43. a bump; 44. a concave block;

51. a chute; 52. a slide block; 53. a cylinder; 54. a slide bar; 55. a spring; 56. a stop block; 57. abutting blocks;

6. and (5) electrically connecting the jacks.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The embodiments are described with reference to fig. 1-6.

An embodiment, a radio frequency ablation needle combination, referring to fig. 1, comprises a puncture needle tube 1 and an ablation needle 2 inserted into the puncture needle tube 1;

the surface of the puncture needle tube 1 is coated with an electrostatic heat insulation layer 3, the electrostatic heat insulation layer 3 is a Teflon coating, and a gap of 2cm is reserved at the needle tip of the puncture needle tube 1 by the Teflon coating, so that the needle tip of the puncture needle tube 1 has heat release performance.

The puncture needle tube 1 comprises a holding seat 11 made of plastic, the holding seat 11 is fixed at the upper end part of the puncture needle tube 1, the tube body of the puncture needle tube 1 is communicated with the holding seat 11, and the needle body of the ablation needle 2 can be inserted into the puncture needle tube 1 from the holding seat 11 and penetrates out.

The ablation needle 2 comprises a connecting seat 21 made of plastic; the top of connecting seat 21 is equipped with electric connection jack 6, and electric connection jack 6 is used for the quick plug connection of radio frequency instrument.

Therefore, after the ablation needle 2 is inserted into the puncture needle tube 1, the ablation needle 2 is connected with a radio-frequency instrument to perform radio-frequency thermal coagulation data.

Regarding the connection relationship between the connection base 21 and the grip base 11, the following description is given:

referring to fig. 2 to 4, the grip base 11 is provided with a slide 42, and the longitudinal direction of the slide 42 and the longitudinal direction of the puncture needle tube 1 are parallel to each other;

the connecting seat 21 is provided with a connecting rod 41 in a protruding manner, the connecting rod 41 extends downwards towards the connection, the cross section of the connecting rod 41 is rectangular, and the connecting rod 41 slides in a sliding way 42 at intervals;

when the connecting rod 41 slides on the slide way 42, the ablation needle 2 is just aligned with the puncture needle tube 1 to be inserted, and at the moment, the inclined plane of the needle point of the ablation needle 2 and the inclined plane of the needle hole of the puncture needle tube 1 have the same inclination angle.

During insertion of the ablation needle 2 into the puncture needle tube 1, there are 2 steps: step 1, the needle point of the ablation needle 2 and the needle hole of the puncture needle tube 1 are attached to form an inclined plane, and the needle point of the ablation needle 2 extends out of the needle hole of the puncture needle tube 1.

In the step 1, the positioning design is carried out by adopting a structure, and the design is specifically as follows.

The connecting rod 41 is fixed with a lug 43; the side wall of the holding seat 11 is slidably provided with a concave block 44 which is transversely clamped into the convex block 43 to limit the ablation needle 2 to enter and exit the puncture needle tube 1, and the side wall of the holding seat 11 is provided with an elastic component which pushes the convex block 43 to slide towards the connecting rod 41;

the elastic component comprises a sliding groove 51 and a sliding block 52, the sliding block 52 slides on the sliding groove 51, the sliding groove 51 and the sliding rail 42 are vertically arranged, and the concave block 44 is fixed on the sliding block 52; a cylinder 53 is fixed in the slide groove 51, a slide bar 54 slides in the cylinder 53, the slide bar 54 is fixed on the slide block 52, and a spring 55 for pushing the slide bar 54 to move toward the link 41 is provided in the cylinder 53.

To avoid the slide bar 54 from being separated from the cylinder 53, a stop 56 is fixed to one end of the slide bar 54 located in the cylinder 53, and a stop 57 for stopping the stop 56 to limit the slide bar 54 from being separated from the cylinder 53 is fixed to the nozzle of the cylinder 53.

Therefore, when the connecting rod 41 slides on the slide way 42 and is provided with a concave block 44 which is clamped towards the slide way 42, medical staff can manually wave from the concave block 44, so that the convex block 43 and the concave block 44 are clamped, at the moment, the limiting effect of the concave block 44 enables the connecting rod 41 to be unable to move back and forth on the slide way 42, at the clamping position, as shown in fig. 5, the ablation needle 2 seals the needle hole of the puncture needle tube 1, the needle point of the ablation needle 2 and the needle hole of the puncture needle tube 1 are jointed into an inclined plane, and the needle point inclined plane of the ablation needle 2 is smoothly connected with the needle hole of the puncture needle tube 1.

In the clamping position, the seat is abutted against the holding seat 11 with a gap, and medical staff holds the holding seat 11 of the puncture needle tube 1 for puncture, and as the needle hole position is blocked, human tissues cannot enter the puncture needle tube 1 after being cut by the needle hole.

After the puncturing operation is completed, when the medical staff can manually separate the protruding block 43 and the concave block 44, i.e. the concave block 44 is pushed backwards along the sliding groove 51, the protruding block 43 does not restrict the concave block 44, and then the medical staff stretches out the needle tip of the ablation needle 2 from the puncturing needle tube 1, and at this time, as shown in fig. 6, the connecting seat 21 is abutted against the holding seat 11.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a radio frequency ablation needle combination, includes puncture needle tubing (1) and inserts ablation needle (2) of puncture needle tubing (1), and the surface of puncture needle tubing (1) is coated with electrostatic insulation layer (3), characterized by: the puncture needle tube (1) comprises a holding seat (11) for inserting an ablation needle (2), and the ablation needle (2) comprises a connecting seat (21):

the inclined plane of the needle point of the ablation needle (2) is the same as the inclined plane of the needle hole of the puncture needle tube (1)

A connecting rod (41) protruding out of the side wall of the holding seat (11) is fixed on the side wall of the connecting seat (21), and a bump (43) is fixed on the connecting rod (41);

the side wall of the holding seat (11) is slipped with a concave block (44) which is transversely clamped into the convex block (43) to limit the ablation needle (2) to enter and exit the puncture needle tube (1), and the side wall of the holding seat (11) is provided with an elastic component which pushes the convex block (43) to slip towards the connecting rod (41);

when the convex block (43) is clamped into the concave block (44), the ablation needle (2) seals the needle hole of the puncture needle tube (1), the needle tip inclined surface of the ablation needle (2) is smoothly connected with the needle hole of the puncture needle tube (1), and the seat is abutted against the holding seat (11) with a gap;

when the lug (43) and the concave block (44) are manually separated, the needle tip of the ablation needle (2) extends out of the puncture needle tube (1), and the connecting seat (21) is abutted against the holding seat (11).

2. The radio frequency ablation needle assembly of claim 1, wherein: the holding seat (11) is provided with a slide way (42), the connecting rod (41) slides in the slide way (42) in a clearance way, and the cross section of the connecting rod (41) is rectangular.

3. The radio frequency ablation needle assembly of claim 2, wherein: the elastic component comprises a sliding groove (51) and a sliding block (52), the sliding block (52) slides in the sliding groove (51), the sliding groove (51) and the sliding way (42) are vertically arranged, and the concave block (44) is fixed on the sliding block (52);

a cylinder (53) is fixed in the sliding groove (51), a sliding rod (54) slides in the cylinder (53), the sliding rod (54) is fixed on the sliding block (52), and a spring (55) for pushing the sliding rod (54) to move towards the connecting rod (41) is arranged in the cylinder (53).

4. A radio frequency ablation needle assembly according to claim 3, wherein: one end of the sliding rod (54) is positioned in the cylinder (53) and is fixedly provided with a stop block (56), and the nozzle of the cylinder (53) is fixedly provided with a stop block (57) for blocking the stop block (56) to limit the sliding rod (54) from being separated from the cylinder (53).

5. The radio frequency ablation needle assembly of claim 1, wherein: the electrostatic heat insulation layer (3) is a Teflon coating.

6. The radio frequency ablation needle assembly of claim 5, wherein: the Teflon coating is positioned at the needle tip of the puncture needle tube (1) and has a gap of 1-3 cm.

7. The radio frequency ablation needle assembly of claim 1, wherein: the top of the connecting seat (21) is provided with an electric connection jack (6).