CN219354138U - Electric field pulse ablation device - Google Patents

Abstract

The utility model discloses an electric field pulse ablation device which comprises a first ablation needle and a handle, wherein the handle is positioned at the rear end of the first ablation needle, the first ablation needle is hollow to form a channel, the front end of the channel is closed, a first insulating sleeve is arranged in the channel, and an electric heating element or a temperature measuring element is arranged in the first insulating sleeve. The utility model can adapt to the complex scene of ablation and can also improve the safety of ablation.

Description

Electric field pulse ablation device

Technical Field

The utility model belongs to the field of medical appliances, and particularly relates to an electric field pulse ablation device.

Background

Ablation therapy is a common treatment modality in tumor therapy, and functions to necrotize cells within a tumor by means of temperature, chemistry, and the like.

The temperature ablation can be classified into cold field ablation and thermal field ablation, and the function of the temperature ablation is to dehydrate tumor cells, form ice crystals or thermally coagulate tumor cells to be necrotic. However, due to the influence of heat conduction, the above ablation method is easy to affect surrounding tissues, and is easy to cause damage to surrounding normal tissues, especially in the case of surrounding blood vessels or nerves, so that the risk of operation is greatly increased.

Based on this, an electric field pulse ablation mode has been developed, which is to form a high-voltage electric field pulse in the area to be ablated and pierce the cell membrane to cause tumor cell necrosis, and the ablation mode can avoid the defects of all temperature ablations, so that the effect is very obvious.

However, in the clinical treatment process, the specific ablation scene is various, and in the existing electric field pulse ablation process, cells in the needle tract are required to be ablated, so that the ablation safety is improved, but the existing electric field pulse ablation cannot meet the actual treatment requirement.

Disclosure of Invention

The utility model aims to provide an electric field pulse ablation device which can adapt to the complex scene of ablation and can also improve the safety of the ablation.

The technical scheme is as follows:

the electric field pulse ablation device comprises a first ablation needle and a handle, wherein the handle is positioned at the rear end of the first ablation needle, the first ablation needle is hollow to form a channel, the front end of the channel is closed, a first insulating sleeve is arranged in the channel, and an electric heating element or a temperature measuring element is arranged in the first insulating sleeve.

In one embodiment, a second insulating sleeve is arranged outside the first ablation needle, the second insulating sleeve is in sliding fit with the first ablation needle, and an adjusting button is further arranged on the handle and connected with the second insulating sleeve.

In one embodiment, a second ablation needle is sleeved outside the second insulation sleeve, and a third insulation sleeve is sleeved outside the second ablation needle.

In one embodiment, a plurality of positioning parts are longitudinally arranged on the handle, and the adjusting buttons correspond to the positioning parts; the positioning part is a positioning gap arranged on the handle, and the adjusting button is provided with a positioning protrusion which is matched with the positioning gap.

In one embodiment, a chute is provided on the handle, the adjusting button is mounted in the chute, and a blocking piece is provided on the rear side of the adjusting button, and the blocking piece at least partially blocks the chute.

In one embodiment, the adjusting button comprises a sliding seat, a spring arm and a pressing button, the sliding seat is matched with the handle, the spring arm is arranged on the sliding seat, and the pressing button is arranged at the end part of the spring arm.

In one embodiment, the first ablation needle and the second insulation sleeve, the second insulation sleeve and the second ablation needle and the third insulation sleeve are in sliding fit; three adjusting buttons are arranged in the sliding groove and are respectively connected with the second insulating sleeve, the second ablation needle and the third insulating sleeve, and a longitudinal positioning mechanism is arranged between two adjacent adjusting buttons.

In one embodiment, the handle comprises a handle front cover, a handle rear cover and two handle split bodies, wherein the two handle split bodies are longitudinally split, after the two handle split bodies are covered, the front ends of the two handle split bodies are connected with the handle front cover, and the rear ends of the two handle split bodies are connected with the handle rear cover.

In one embodiment, a first lead wire and a second lead wire are arranged at the rear end of the handle, the first lead wire is connected with the first ablation needle in a conductive mode, and the second lead wire is connected with the electric heating element or the temperature measuring element in a conductive mode.

In one embodiment, the needle body of the first ablation needle is made of conductive material and forms a conductive layer on the outer surface of the needle body, and an insulating film layer is arranged on the outer surface of the needle body and divides the conductive layer into at least two conductive segments.

The technical scheme provided by the utility model has the following advantages and effects:

according to the electric field pulse ablation device, the hollow structure is arranged in the first ablation needle, the electric heating element is arranged in the first ablation needle, the first ablation needle can be heated through the electric heating element, the electric field pulse ablation device can adapt to complex scenes in an ablation operation process, after electric field pulse ablation is carried out, the first ablation needle can be heated through the electric heating element, and tumor cells in the first ablation needle or/and a needle tract can be killed through high temperature, so that the safety of the ablation operation is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and, together with the description, serve to explain the principles and effects of the utility model.

Unless specifically stated or otherwise defined, the same reference numerals in different drawings denote the same or similar technical features, and different reference numerals may be used for the same or similar technical features.

FIG. 1 is a block diagram of an electric field pulse ablation device according to a first embodiment of the present utility model;

FIG. 2 is a cross-sectional view of the electric field pulse ablation device in accordance with a first embodiment of the present utility model;

FIG. 3 is an exploded view of the electric field pulse ablation device in accordance with the first embodiment of the present utility model;

FIG. 4 is a first partial enlarged view of FIG. 2;

FIG. 5 is a second enlarged partial view of FIG. 2;

FIG. 6 is a partial enlarged view of an adjustment button in the first embodiment;

FIG. 7 is a block diagram of the electric field pulse ablation device in accordance with the first embodiment of the utility model;

FIG. 8 is an enlarged view of a portion of FIG. 7;

FIG. 9 is a schematic illustration of ablation of a second embodiment of the utility model;

FIG. 10 is an exploded view of the electric field pulse ablation device in a third embodiment of the utility model;

FIG. 11 is a first enlarged partial view of FIG. 10;

fig. 12 is a diagram showing a structure of the electric field pulse ablation device according to the fourth embodiment of the present utility model;

FIG. 13 is a partial cross-sectional view of FIG. 12;

FIG. 14 is an exploded view of FIG. 13;

FIG. 15 is an exploded cross-sectional view of FIG. 13;

FIG. 16 is a first enlarged partial view of FIG. 13;

FIG. 17 is a second enlarged partial view of FIG. 13;

FIG. 18 is an enlarged view of a portion of FIG. 15;

fig. 19 is a partial enlarged view of the front end of the electric field pulse ablation device in the fifth embodiment of the utility model; a is that

Reference numerals illustrate:

10. a first ablation needle, 101, a second ablation needle, 11, a conductive segment, 12, an insulating film layer, 13, a channel,

20. handle, 201, handle split, 21, chute, 211, positioning gap, 215, inner cavity, 22, handle front cover, 23, handle back cover, 24, handle split, 241, internal thread, 251, conductive block 251, 252, conductive slide hole 252, 253, positioning block 253,

31. an electric heating element, 32, a temperature measuring element,

41. first, 42, second, 43, third,

51. an adjusting button, 511, a positioning boss, 512, a blocking piece, 513, a sliding seat, 514, a spring arm, 515, a pressing button, 516, a slider, 521, a first longitudinal positioning portion, 522, a second longitudinal positioning portion, 523, a third longitudinal positioning portion, 524, a fourth longitudinal positioning portion, 525, a fifth longitudinal positioning portion, 526, a sixth longitudinal positioning portion,

61. first conductive lines 62, second conductive lines 63, connecting pipes 631, external threads 64, third conductive lines 64, 65, fourth conductive lines,

70. an ablation zone.

Detailed Description

In order that the utility model may be readily understood, a more particular description of specific embodiments thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Unless defined otherwise or otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. All technical and scientific terms used herein also have the meanings corresponding to the objectives of the technical solution implementing the utility model, in the context of a realistic scenario in combination with the technical solution of the utility model.

As used herein, the terms "first and second …" are used merely to distinguish between names and not to represent a particular number or order unless otherwise specified or defined.

The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items, unless specifically stated or otherwise defined.

It will be understood that when an element is referred to as being "fixed" to another element, it can be directly fixed to the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; when an element is referred to as being "mounted to" another element, it can be directly mounted to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

As used herein, unless specifically stated or otherwise defined, "the" means that the feature or technical content mentioned or described before in the corresponding position may be the same or similar to the feature or technical content mentioned.

Clearly, technical contents or features that are contrary to the object of the present utility model or that are clearly contradictory should be excluded.

Example 1

As shown in fig. 1 to 6, the electric field pulse ablation device comprises a first ablation needle 10 and a handle 20, wherein the handle 20 is positioned at the rear end of the first ablation needle 10, the handle 20 comprises a handle front cover 22, a handle rear cover 23 and two handle split bodies 24, the two handle split bodies 24 are longitudinally split, a cavity is formed between the two handle split bodies 24, after the two handle split bodies 24 are covered, the front end of the two handle split bodies 24 is connected with the handle front cover 22, the rear end of the two handle split bodies are connected with the handle rear cover 23, a chute 21 is arranged on the handle 20, and an adjusting button 51 is arranged at the chute 21 of the handle 20.

The first ablation needle 10 is hollow to form a channel 13, the front end of the channel 13 is closed, a first insulation sleeve 41 is arranged in the channel 13, and an electric heating element 31 is arranged in the first insulation sleeve 41. A first conductive wire 61 and a second conductive wire 62 are provided at the rear end of the handle 20, and the first conductive wire 61 and the second conductive wire 62 are respectively connected with the first ablation needle 10 and the electric heating element 31 in a conductive manner.

According to the electric field pulse ablation device, a hollow structure is arranged in the first ablation needle 10, an electric heating element 31 is arranged in the first ablation needle, the first ablation needle 10 can be heated through the electric heating element 31, the electric field pulse ablation device can adapt to complex scenes in an ablation operation process, after electric field pulse ablation is carried out, the first ablation needle 10 can be heated through the electric heating element 31, tumor cells in the first ablation needle 10 or/and a needle tract can be killed through high temperature, and the safety of the ablation operation is improved.

The current and voltage of the electricity used by the first ablation needle 10 and the electric heating element 31 have different requirements, and in general, the first ablation needle 10 adopts high-voltage pulse current, and the electric heating element 31 adopts low-frequency low-voltage current or adopts direct current. The first insulation sleeve 41 is fixedly arranged in the hollow channel 13 of the first ablation needle 10 by bonding or other modes, and the power supply of the first ablation needle 10 and the electric heating element 31 is isolated by the first insulation sleeve 41.

A second insulating sleeve 42 is arranged outside the first ablation needle 10, the second insulating sleeve 42 is in sliding fit with the first ablation needle 10, an adjusting button 51 is further arranged on the handle 20, and the adjusting button 51 is connected with the second insulating sleeve 42. The adjustment button 51 allows adjustment of the longitudinal sliding position of the second insulating sleeve 42, thereby adjusting the exposed length of the front end of the first ablation needle 10 and thus the ablation region of the first ablation needle 10.

The adjusting button 51 includes a sliding seat 513, a spring arm 514, and a pressing button 515, the sliding seat 513 is matched with the handle 20, the spring arm 514 is disposed on the sliding seat 513, and the pressing button 515 is disposed at an end of the spring arm 514. A plurality of positioning portions (i.e., positioning notches 211) are longitudinally provided on the slide groove 21 of the handle 20, and a positioning protrusion 511 is provided on the adjustment button 51, and the positioning protrusion 511 is engaged with the positioning notches 211. The adjustment button 51 corresponds to a positioning portion. A blocking piece 512 is provided at the rear side of the adjusting button 51, and the blocking piece 512 at least partially blocks the chute 21.

The adjusting button 51 adopts a spring arm structure, the size of the front end of the spring arm structure is smaller, the adjusting button 51 can be conveniently positioned through the spring arm structure, when the pressing button 515 is pressed down, the positioning convex 511 is separated from the positioning notch 211, the longitudinal position of the adjusting button 51 is slid, when the pressing button 515 is released, the spring arm 514 is reset under the elastic action of the spring arm 514, the positioning convex 511 is clamped into the corresponding positioning notch 211, and the longitudinal position of the adjusting button 51 is relatively fixed.

In order to facilitate the fixation and circuit connection of the first ablation needle 10, a connection conduit 63 is provided in the handle 20, and the first lead wire 61 is connected with the first ablation needle 10 through the connection conduit 63. The handle 20 is provided with an internal thread 241, the connecting pipe 63 is provided with an external thread 631, and the connecting pipe 63 is connected to the handle 20 by the internal thread 241 and the external thread 631.

Example two

As shown in fig. 7 to 9, in the present embodiment, the needle body of the first ablation needle 10 is made of a conductive material and a conductive layer is formed on the outer surface of the needle body, and an insulating film layer 12 is disposed on the outer surface of the needle body, and the insulating film layer 12 separates the conductive layer into a plurality of conductive segments 11.

As shown in fig. 9, when performing ablation, the electric field pulse ablation devices according to the two embodiments of the present utility model are placed in parallel, and since the outer surface of the first ablation needle 10 of the electric field pulse ablation device in this embodiment is provided with the insulating film layer 12, the insulating film layer 12 separates the conductive layer into a plurality of conductive segments 11, when performing electric field pulse ablation, each conductive segment 11 forms a respective ablation electric field, and the ablation area 70 is divided by each separate ablation electric field, so that defects caused by oversized ablation area are avoided, temperature rise of the ablation area is avoided, the ablation area is easier to control, damage to normal human tissues is reduced, and when performing ablation for large tumors, the replacement of tumor cells is reduced without needle withdrawal and the risk of surgery is greatly reduced.

Example III

As shown in fig. 10 to 11, in this embodiment, compared with the first embodiment, the electric heating element 31 is replaced by the temperature measuring element 32, and the original electric heating function is replaced by the temperature sensing function, so that the temperature of the first ablation needle 10 is sensed, the temperature runaway in the ablation process can be avoided, and the electric field pulse ablation device can adapt to a complex scene in the ablation process, so that the safety of the ablation process is improved.

Example IV

As shown in fig. 12 to 18, the electric field pulse ablation device comprises a first ablation needle 10, a second ablation needle 101, a first insulation sleeve 41, a second insulation sleeve 42, a third insulation sleeve 43 and a handle 20, wherein the first ablation needle 10 is hollow to form a channel 13, the front end of the channel 13 is closed, the first insulation sleeve 41 is arranged in the channel 13, and an electric heating element 31 is arranged in the first insulation sleeve 41; the second insulation sleeve 42 is sleeved outside the first ablation needle 10, the second ablation needle 101 is sleeved outside the second insulation sleeve 42, and the third insulation sleeve 43 is sleeved outside the second ablation needle 101.

The handle 20 is disposed at rear end positions of the first ablation needle 10, the second ablation needle 101, the first insulation sleeve 41, the second insulation sleeve 42, and the third insulation sleeve 43. A first lead wire 61, a second lead wire 62, and a third lead wire 64 are provided behind the handle 20, respectively, and the first lead wire 61, the second lead wire 62, and the third lead wire 64 are respectively connected to the first ablation needle 10, the second ablation needle 101, and the electric heating element 31.

The handle 20 includes a front handle cover 22, a rear handle cover 23, and two split handle bodies 211, where the split handle bodies 211 are longitudinally split, an inner cavity 215 is formed between the split handle bodies 211, and after the split handle bodies 211 are covered, the front end of the split handle body 211 is connected with the front handle cover 22, and the rear end of the split handle body is connected with the rear handle cover 23.

In the electric field pulse ablation device of the present embodiment, the first ablation needle 10 and the second ablation needle 101 respectively form two ablation electrodes, the first ablation needle 10 and the second ablation needle 101 are insulated and isolated by the second insulation sleeve 42, and a high-voltage pulse electric field is formed by the first ablation needle 10 and the second ablation needle 101 for ablation; the electric field pulse ablation device can adapt to complex scenes in the ablation operation process, and after electric field pulse ablation is carried out, the electric heating element 31 can be used for heating the first ablation needle 10 and the second ablation needle 101, tumor cells in the ablation needle or/and needle channels can be killed by high temperature, so that the safety of the ablation operation is improved.

As shown in fig. 14, 16 and 18, the first ablation needle 10 is slidably engaged with the second insulation sleeve 42, the second insulation sleeve 42 is slidably engaged with the second ablation needle 101, and the second ablation needle 101 is slidably engaged with the third insulation sleeve 43; the handle 20 is provided with a chute 21, three adjusting buttons 51 are arranged in the chute 21, the three adjusting buttons 51 are respectively connected with the second insulating sleeve 42, the second ablation needle 101 and the rear ends of the second ablation needle 101 and the third insulating sleeve 43, and a longitudinal positioning mechanism is arranged between two adjacent adjusting buttons 51. Specifically, the handle 20 is provided with a first longitudinal positioning portion 521, a second longitudinal positioning portion and a third longitudinal positioning portion in the adjustment button 51 connected to the second insulating sheath 42, a fourth longitudinal positioning portion 524 and a fifth longitudinal positioning portion 525 in the adjustment button 51 connected to the second ablation needle 101, and a sixth longitudinal positioning portion 526 in the adjustment button 51 connected to the third insulating sheath 43; the first and second longitudinal positioning portions 521 and 522 cooperate to form a first longitudinal positioning mechanism, the third and fourth longitudinal positioning portions 523 and 524 cooperate to form a second longitudinal positioning mechanism, and the fifth and sixth longitudinal positioning portions 525 and 526 cooperate to form a third longitudinal positioning mechanism.

The first longitudinal positioning portion 521 is at least two positioning grooves provided on the handle 20, and the third longitudinal positioning portion 523 and the fifth longitudinal positioning portion 525 are at least two positioning grooves provided inside each adjustment button 51; the second longitudinal positioning portion 522, the fourth longitudinal positioning portion 524, and the sixth longitudinal positioning portion 526 are elastic pieces provided outside the pressing buttons 515 of the respective adjustment buttons 51, respectively. In making the adjustment of the longitudinal position of the second insulation sleeve 42, the second ablation needle 101, the third insulation sleeve 43, coordination between several components needs to be considered, such as: the exposed length of the first ablation needle 10 can be adjusted by adjusting the longitudinal position of the second insulation sleeve 42, so that the ablation area can be adjusted, but when the longitudinal position of the second insulation sleeve 42 is adjusted, the second ablation needle 101 and the third insulation sleeve 43 need to move synchronously, otherwise, the exposed length of the second ablation needle 101 can be changed, so that when the second insulation sleeve 42 is adjusted, the second ablation needle 101 and the third insulation sleeve are linked synchronously, and the problem can be solved; similarly, the third insulating sleeve 43 needs to be synchronized for adjustment of the second ablation needle 101.

The adjusting button 51 has a push button 515 and a slider 516, the push button 515 being connected to the slider 516, the slider 516 being located in the cavity 215 and being in sliding engagement with the handle 20. A conductive block 216 is fixedly arranged in the inner cavity 215, the conductive block 216 and the handle 20 realize the fixation of the longitudinal position through a positioning block 253, and a conductive sliding hole 252 is arranged in the conductive block 216, and the conductive sliding hole 252 is in sliding fit and conductive connection with the outer wall of the second ablation needle 101.

Each adjusting button 51 is provided with a sliding block 516, the sliding blocks 516 are matched with the inner wall of the inner cavity 215 of the handle 20, and when the adjusting buttons 51 slide, the sliding can be more stable, so that the sliding positions of the second insulating sleeve 42, the second ablation needle 101 and the third insulating sleeve 43 can be controlled more accurately; a conductive block 216 is fixedly arranged in the inner cavity 215, and when the position of the second ablation needle 101 is controlled, the longitudinal sliding of the second ablation needle 101 is not affected in order to improve the reliability of the conductive connection between the second ablation needle 101 and the second conductive wire 62.

Example five

As shown in fig. 19, in this embodiment, compared with the fourth embodiment, the electric heating element 31 is replaced by the temperature measuring element 32, and the original electric heating function is replaced by the temperature sensing function, so that the temperature of the first ablation needle 10 and the temperature of the second ablation needle 101 are sensed, the temperature runaway in the ablation process can be avoided, and the electric field pulse ablation device can adapt to a complex scene in the ablation process, so that the safety of the ablation process is improved.

It can be understood that in the structure described in the embodiment of the present utility model, the first insulating sleeve 41 may be changed into a through pipe, and fluid may be introduced into the first ablation needle 10 through the through pipe during the ablation process, so as to cool the first ablation needle 10, and after cooling the first ablation needle 10, the problems of scalding and the like caused by higher temperature may be prevented, and damage may be reduced. Preferably, a gap may be left between the vent tube and the passageway 13 of the first ablation needle 10 through which fluid (e.g., cooling liquid or cooling gas) exiting the vent tube may be vented.

In the structure described in the foregoing embodiment, the functions of electric heating, temperature measurement, and fluid cooling may also be combined at the same time.

The foregoing embodiments are provided for the purpose of exemplary reproduction and deduction of the technical solution of the present utility model, and are used for fully describing the technical solution, the purpose and the effects of the present utility model, and are used for enabling the public to understand the disclosure of the present utility model more thoroughly and comprehensively, and are not used for limiting the protection scope of the present utility model.

The above examples are also not an exhaustive list based on the utility model, and there may be a number of other embodiments not listed. Any substitutions and modifications made without departing from the spirit of the utility model are within the scope of the utility model.

Claims (10)

1. The electric field pulse ablation device is characterized by comprising a first ablation needle and a handle, wherein the handle is positioned at the rear end of the first ablation needle, the first ablation needle is hollow to form a channel, the front end of the channel is closed, a first insulating sleeve is arranged in the channel, and an electric heating element or a temperature measuring element is arranged in the first insulating sleeve.

2. The electric field pulse ablation device of claim 1, wherein a second insulating sleeve is disposed outside the first ablation needle and is in sliding engagement with the first ablation needle, and an adjustment button is disposed on the handle and is connected to the second insulating sleeve.

3. The electric field pulse ablation device of claim 2, wherein a second ablation needle is sleeved outside the second insulation sleeve, and a third insulation sleeve is sleeved outside the second ablation needle.

4. The electric field pulse ablation device of claim 3, wherein a plurality of positioning portions are longitudinally provided on the handle, and the adjustment button corresponds to the positioning portions; the positioning part is a positioning gap arranged on the handle, and the adjusting button is provided with a positioning protrusion which is matched with the positioning gap.

5. The electric field pulse ablation device of claim 4, wherein a chute is provided on the handle, the adjustment button is mounted in the chute, and a stop is provided on the rear side of the adjustment button, the stop at least partially blocking the chute.

6. The electric field pulse ablation device of claim 5, wherein the adjustment button comprises a sliding seat, a spring arm and a pressing button, the sliding seat is matched with the handle, the spring arm is arranged on the sliding seat, and the pressing button is arranged at the end part of the spring arm.

7. The electric field pulse ablation device of claim 6, wherein the first ablation needle is slidably engaged with the second insulation sleeve, the second insulation sleeve is slidably engaged with the second ablation needle, and the second ablation needle is slidably engaged with the third insulation sleeve; three adjusting buttons are arranged in the sliding groove and are respectively connected with the second insulating sleeve, the second ablation needle and the third insulating sleeve, and a longitudinal positioning mechanism is arranged between two adjacent adjusting buttons.

8. The electric field pulse ablation device of any of claims 1 to 7, wherein the handle comprises a handle front cover, a handle rear cover and two handle split bodies, the two handle split bodies are longitudinally split, and after the two handle split bodies are covered, the front ends of the two handle split bodies are connected with the handle front cover, and the rear ends of the two handle split bodies are connected with the handle rear cover.

9. The electric field pulse ablation device of any of claims 1-7, wherein a first lead wire is provided at a rear end of the handle, the first lead wire being in conductive communication with the first ablation needle, and a second lead wire being in conductive communication with the electrical heating element or the temperature measuring element.

10. The electric field pulse ablation device of any of claims 1 to 7, wherein the needle body of the first ablation needle is made of a conductive material and forms a conductive layer on an outer surface of the needle body, and an insulating film layer is provided on the outer surface of the needle body, the insulating film layer separating the conductive layer into at least two conductive segments.