CN114711946A - Ablation needle and ablation system - Google Patents

Ablation needle and ablation system Download PDF

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Publication number
CN114711946A
CN114711946A CN202210504404.9A CN202210504404A CN114711946A CN 114711946 A CN114711946 A CN 114711946A CN 202210504404 A CN202210504404 A CN 202210504404A CN 114711946 A CN114711946 A CN 114711946A
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needle
positioning
locking
ablation
sheath
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姚通
杨迟
常兆华
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Accu Target Medipharma Shanghai Co ltd
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Accu Target Medipharma Shanghai Co ltd
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Priority to CN202210504404.9A priority Critical patent/CN114711946A/en
Publication of CN114711946A publication Critical patent/CN114711946A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1402—Probes for open surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A61B2018/0293—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument interstitially inserted into the body, e.g. needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1405—Electrodes having a specific shape
    • A61B2018/1425—Needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
    • A61B2018/1869—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/007—Aspiration

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  • Plasma & Fusion (AREA)
  • Electromagnetism (AREA)
  • Surgical Instruments (AREA)

Abstract

The invention provides an ablation needle and an ablation system, comprising: an ablation needle part and a heat insulation sheath tube; the ablation needle portion includes: the needle rod, the vacuum wall inner tube and the air inlet tube, wherein the far end of the needle rod is provided with a needle point; the heat insulation sheath pipe is sleeved on the needle rod; the two are detachably connected; a preset distance is reserved between the far end of the needle rod and the far end of the heat-insulation sheath tube, and a section of area where the preset distance is located is a target area; the far end of the heat-insulating sheath tube is one end of the heat-insulating sheath tube close to the needle point; the vacuum wall inner tube penetrates through the needle rod, an interlayer is formed between the vacuum wall inner tube and the needle rod, and the interlayer is an interlayer capable of forming vacuum; the air inlet pipe is inserted into the needle rod, the far end of the air inlet pipe extends into the target area, and the far end of the air inlet pipe is one end, close to the needle point, of the air inlet pipe. According to the invention, through the design of the heat-insulating sheath tube, and the heat-insulating sheath tube is detachably connected with the needle rod, the biopsy and ablation of a single needle channel can be realized, and the injury of a patient caused by secondary puncture is avoided.

Description

Ablation needle and ablation system
Technical Field
The invention relates to the technical field of ablation, in particular to an ablation needle and an ablation system.
Background
Before percutaneous puncture cryoablation, puncture biopsy is often needed to identify the development stage of tumors, and biopsy and ablation are needed to puncture at least once respectively, so that the number of puncture times is increased, and complications such as bleeding, metastasis, pneumothorax and the like are increased correspondingly.
Disclosure of Invention
The invention provides an ablation needle and an ablation system, and aims to solve the problems that biopsy and ablation need to be respectively punctured and the puncturing times are high in the prior art.
According to a first aspect of the invention, there is provided an ablation needle comprising: an ablation needle part and a heat insulation sheath tube; wherein the content of the first and second substances,
the ablation needle portion includes: the needle comprises a needle rod, a vacuum wall inner tube and an air inlet tube, wherein the far end of the needle rod is provided with a needle point;
the heat insulation sheath pipe is sleeved on the needle rod; the heat insulation sheath tube is detachably connected with the needle rod;
a preset distance is reserved between the distal end of the needle rod and the distal end of the heat-insulating sheath tube, and a section of area where the preset distance is located is a target area; the far end of the heat-insulating sheath tube is the end of the heat-insulating sheath tube close to the needle point;
the vacuum wall inner tube penetrates through the needle rod, an interlayer is formed between the vacuum wall inner tube and the needle rod, and the interlayer is an interlayer capable of forming vacuum;
the intake pipe inserts in the needle bar, the distal end of intake pipe extends to in the target area, the distal end of intake pipe does be being close to of intake pipe the one end of needle point.
Preferably, the temperature-insulating sheath includes: an outer sheath layer and an inner sheath layer;
the sheath pipe outer layer is sleeved on the sheath pipe inner layer, a sheath pipe interlayer is formed between the sheath pipe outer layer and the sheath pipe inner layer, and the sheath pipe interlayer is a vacuum interlayer capable of being formed.
Preferably, the end face of the distal end portion of the thermal insulation sheath tube is provided with a chamfer.
Preferably, the method further comprises the following steps: the handle portion, the handle portion includes sheath pipe connecting piece, sheath pipe connecting piece with it links to each other to separate the temperature sheath pipe.
Preferably, the handle portion further comprises: a seal assembly;
the proximal end of the sheath tube connecting piece extends out of the proximal end of the heat-insulating sheath tube, and the proximal end of the needle bar extends out of the proximal end of the heat-insulating sheath tube; the proximal end of the sheath tube connecting piece is the end of the sheath tube connecting piece far away from the needle point;
the sealing assembly is used for isolating the inner space and the outer space of the handle part.
Preferably, the seal assembly comprises: a sealing ring, a sealing ring pressing piece, wherein,
the sealing ring can be sleeved on the needle rod, and the sealing ring pressing piece is pressed on the outer wall of the sealing ring.
Preferably, the handle portion further comprises: a suction interface;
a suction cavity is formed in a gap between the needle rod and the heat insulation sheath tube;
one end of the suction interface is connected with the suction cavity.
Preferably, the needle rod and the thermal insulation sheath tube can relatively slide along the axial direction of the needle rod to adjust the length of the target area.
Preferably, the method further comprises the following steps: and the locking positioning piece can be controlled to limit the relative sliding between the needle rod and the heat-insulation sheath.
Preferably, the locking positioning member comprises: a first locking and positioning part and a second locking and positioning part, wherein,
one end of the first locking and positioning piece is directly or indirectly connected with the heat-insulating sheath tube, and the other end of the first locking and positioning piece can be controlled to be locked on the second locking and positioning piece;
the second locking positioning part can be controlled to limit the relative sliding between the first locking positioning part and the needle rod.
Preferably, the first locking locator comprises: a first positioning member, a first locking member;
the second locking positioning member comprises: a second positioning part and a second locking part; wherein the content of the first and second substances,
the far end of the first positioning piece is directly or indirectly connected with the heat-insulating sheath tube, and the near end of the first positioning piece is sleeved on the second positioning piece; the far end of the first positioning piece is one end of the first positioning piece close to the needle point;
the first locking piece is sleeved on the first positioning piece and can be controlled to lock, so that the proximal end of the first positioning piece is locked on the second positioning piece;
the second positioning piece is sleeved on the needle rod, and the second locking piece is sleeved on the proximal end of the second positioning piece and can be controlled to lock so as to lock the proximal end of the second positioning piece on the needle rod; the proximal end of the second positioning piece is the end of the second positioning piece far away from the needle point.
Preferably, the first positioning element and the heat-insulating sheath tube are directly or indirectly connected and fixed through luer fitting.
Preferably, the proximal end of the first positioning member is a multi-claw structure, and when the first locking member is controlled to be locked, the multi-claw structure of the first positioning member can be forced to contract inwards to grip the second positioning member;
and/or the presence of a gas in the gas,
the proximal end of the second positioning piece is of a multi-claw structure, and when the second locking piece is controlled to be locked, the multi-claw structure of the second positioning piece can be forced to contract inwards to grasp the needle rod tightly.
Preferably, the second positioning member is provided with scales capable of indicating the length of the current target area.
According to a second aspect of the invention, there is provided an ablation system comprising: the ablation needle of any preceding claim.
According to the ablation needle and the ablation system provided by the invention, through the design of the heat-insulating sheath tube, the heat-insulating sheath tube is detachably connected with the needle rod, the needle rod in the heat-insulating sheath tube can be exchanged according to the requirement, the heat-insulating sheath tube does not need to be pulled out, the biopsy and ablation of a single needle channel can be realized, and the injury of a patient caused by secondary puncture is avoided.
According to the ablation needle and the ablation system provided by the invention, through the design of the vacuum wall inner tube and the heat insulation sheath tube, double-layer heat insulation is realized, the heat insulation effect is better, and under the condition that one layer of heat insulation fails, the other layer of heat insulation can also play a role in heat insulation, so that the heat insulation is better guaranteed.
In one alternative of the invention, the ablation needle targeting area is adjustable by the design of a two-layer structure, the inner tube of the vacuum wall is of an inner layer structure, the needle rod is of an outer layer structure, and the two-layer structure is as follows: a vacuum wall inner tube, a needle bar; most of cryoablation needles with adjustable targeting area function in the prior art adopt a three-layer tube structure (a needle rod, a vacuum wall outer tube and a vacuum wall inner tube), and compared with the three-layer tube structure in the prior art, the two-layer structure of the cryoablation needle reduces the diameter of the ablation needle, can effectively reduce needle passage wounds in tumors, and reduce the incidence rate of complications such as hemorrhage, pneumothorax, needle passage planting and the like.
In an alternative scheme of the invention, the needle rod and the heat-insulating sheath tube can relatively slide along the axial direction of the needle rod, so that the length of the target area can be adjusted, the target areas with different lengths can be selected according to the size of a tumor, the size and the shape of an ice hockey can be adjusted, the ablation can be better conformed, and excessive ablation, incomplete ablation or frostbite on peripheral organs and blood vessels can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an ablation needle in accordance with an embodiment of the invention;
FIG. 2 is a schematic view of a chamfer of a thermal-insulating sheath according to an embodiment of the present invention;
FIG. 3 is a schematic view of an ablation needle in accordance with an embodiment of the invention;
FIG. 4 is an enlarged view of a portion of an ablation needle in accordance with an embodiment of the invention;
FIG. 5 is a schematic view of an ablation needle according to another embodiment of the invention;
FIG. 6 is a schematic view of an aspiration lumen according to another embodiment of the present invention;
FIG. 7 is a schematic view of a locking and positioning member according to an embodiment of the present invention;
description of reference numerals:
1-a sheath tube part, wherein,
11-a thermal insulation sheath tube,
111-the outer layer of the sheath,
112-the inner layer of the sheath,
12-chamfering the edges of the blank to be chamfered,
13-a suction lumen;
2-the part of the ablation needle is removed,
2，-a target region of a target,
21-a needle bar is arranged at the bottom of the needle,
211-the point of the needle-is,
22-an air inlet pipe,
23-vacuum inner tube, and the inner tube,
24-a gasket;
3-a handle part, wherein the handle part,
31-a sheath tube connecting piece, wherein,
32-a sealing ring, which is,
33-a sealing ring pressing piece,
34-a suction interface;
4-locking the positioning piece, and then locking the positioning piece,
41-a first positioning element, which is,
42-the first locking member is in the form of a first locking member,
43-a second positioning element, the second positioning element,
44-second locking member.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "upper surface", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, "a plurality" means a plurality, e.g., two, three, four, etc., unless specifically limited otherwise.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and the like are to be construed broadly, e.g., as meaning fixedly attached, detachably attached, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In one embodiment, an ablation needle is provided, comprising: a sheath part 1 and an ablation needle part 2, please refer to fig. 1. Wherein, sheath portion 1 includes: a heat-insulating sheath 11; the ablation needle portion includes: needle bar 21, air inlet pipe 22 and vacuum inner pipe 23, the distal end of the needle rod 21 is provided with a needle point 211; the heat insulation sheath tube 11 is sleeved on the needle bar 21, and the heat insulation sheath tube 11 is detachably connected with the needle bar 21. The distal end of the needle bar 21 and the distal end of the heat insulation sheath 11 have a preset distance therebetween, and a section of the preset distance is the target area 2，(ii) a The distal end of the heat-insulating sheath 11 is the end of the heat-insulating sheath 11 close to the needle tip 211. The vacuum inner tube 23 is inserted into the needle bar 21, and an interlayer is formed between the vacuum inner tube 23 and the needle bar 21, and the interlayer is a vacuum-formable interlayer. An air inlet pipe 22 is inserted into the needle bar 21, and the far end of the air inlet pipe 22 extends to the target area 2，The distal end of the air inlet tube 22 is the end of the air inlet tube 22 near the needle tip 211.
When the ablation needle of the above embodiment is used for ablation, the refrigerant or high-pressure gas reaches the target area 2 through the inner cavity of the gas inlet pipe 22，To ablate the tumor on the outer wall, and then to recycle the refrigerant or high pressure gas through the cavity between the needle bar 21 and the air inlet pipe 22.
The ablation needle of the embodiment is to separate temperature sheath pipe and needle bar and independently open, through the design of independent temperature sheath pipe, and separate to be connected for dismantling between temperature sheath pipe and the needle bar, the needle bar in the temperature sheath pipe can be exchanged as required, separate the temperature sheath pipe and need not to extract, the biopsy and the ablation of single needle track can also be realized to independent needle bar, the biopsy only needs the puncture once with melting, can reduce the number of times of puncture, thereby complications such as hemorrhage, transfer, pneumothorax that have avoided causing because the number of times of puncture increases. In addition, the vacuum wall inner pipe is further arranged, double-layer heat insulation is realized through the design of the vacuum wall inner pipe and the heat insulation sheath pipe, the heat insulation effect is better, and under the condition that one layer of the heat insulation pipe fails, the other layer of the heat insulation pipe can also play a role in heat insulation, so that the heat insulation is more guaranteed. Further, the above-mentioned embodiment adopts the design of two-layer structure, and the vacuum wall inner tube is inner layer structure, and the needle bar is outer layer structure, realizes that the targeting district is adjustable, and two-layer structure is promptly: a vacuum wall inner tube, a needle bar; most of cryoablation needles with adjustable targeting area function in the prior art adopt a three-layer tube structure (a needle tube, a vacuum wall outer tube and a vacuum wall inner tube), and compared with the three-layer tube structure in the prior art, the two-layer structure of the cryoablation needle reduces the diameter of the ablation needle, can effectively reduce needle passage wounds in tumors, and reduce the incidence rate of complications such as bleeding, pneumothorax, needle passage planting and the like.
In one embodiment, the vacuum tube 23 is sealed to the needle shaft 21 by a gasket 24, and the gasket 24 is sleeved on the distal end of the vacuum tube 23, as shown in FIG. 4. The seal between the proximal end of the vacuum tube 23 and the needle shaft may also be provided by a gasket or may be vacuum welded.
In various embodiments, the seal between the distal end of the vacuum tube 23 and the needle shaft 21 may be formed by vacuum welding.
In one embodiment, the thermal insulation sheath 11 includes: a sheath outer layer 111 and a sheath inner layer 112; sheath pipe inlayer 112 is located to the outer 111 cover of sheath pipe, has formed the sheath pipe intermediate layer between outer 111 of sheath pipe and the sheath pipe inlayer 112, and the sheath pipe intermediate layer is for can forming the vacuous intermediate layer.
In one embodiment, the end face of the distal end portion of the heat-insulating sheath 11 is provided with a chamfer 12 for facilitating the puncture, and referring to fig. 1 and 2, when the heat-insulating sheath is punctured along with the ablation needle, the puncture resistance can be reduced.
The material and form of the heat-insulating sheath tube 11 are not limited, and a stainless steel tube is preferable.
In one embodiment, the ablation needle further comprises: the handle portion 3, the handle portion 3 includes a sheath tube connecting member 31, and the sheath tube connecting member 31 is connected to the thermal insulation sheath tube 11, please refer to fig. 3.
In one embodiment, the sheath connector 31 and the thermal insulation sheath 11 may be connected together by bonding, welding, injection molding, or the like.
In one embodiment, the handle portion 3 further comprises: a seal assembly; the proximal end of the sheath tube connecting piece 31 extends out of the proximal end of the heat-insulating sheath tube 11, and the proximal end of the needle bar 21 extends out of the proximal end of the heat-insulating sheath tube 11; the proximal end of sheath connector 31 is the end of sheath connector 31 distal to needle tip 211. The sealing assembly is used for isolating the inner space and the outer space of the handle part.
In one embodiment, a seal assembly comprises: a sealing ring 32 and a sealing ring pressing member 33, please refer to fig. 3. Naturally, the central cavity of the sealing ring 32 is in a closed state, so that the inner space and the outer space of the handle 3 can be isolated; when the heat insulation sheath tube is matched with the ablation needle part for use, the needle rod 21 passes through the central cavity of the sealing ring 32 to expand, and the sealing ring 32 tightly wraps the needle rod to realize sealing and isolate the inner space and the outer space of the handle 3. The sealing ring pressing member 33 is pressed on the outer wall of the sealing ring 32, and the sealing ring pressing member 33 is used for pressing the sealing ring 32 to limit the movement of the sealing ring 32.
In one embodiment, the sealing ring 32 is preferably a silicone sealing ring with a self-sealing function.
In one embodiment, the handle portion further comprises: a suction interface 34; the gap between the needle bar 21 and the thermal insulation sheath 11 forms a suction cavity 13, please refer to fig. 5; one end of the suction port 34 is connected to the suction chamber 13, see fig. 5. The other end of the suction port 34 may be externally connected to a suction device, such as a suction pump, suction balloon, or the like. When the ablation needle punctures the focal region, the effusion, the blood or the gas overflowing from pneumothorax in the patient can all flow out of the suction interface 34 through the suction cavity 13, thereby preventing the complications such as effusion, internal hemorrhage, pneumothorax and the like.
In one embodiment, the needle bar and the thermal insulation sheath can relatively slide along the axial direction of the needle bar to adjust the targeting region 2，Length of (d).
In one embodiment, the method further comprises: a locking positioning piece 4, the locking positioning piece 4 can be controlled to limit the relative sliding between the needle rod 21 and the thermal insulation sheath 11 so as to fix the current target area 2，Length of (d).
In one embodiment, the locking spacer 4 comprises: the device comprises a first locking positioning part and a second locking positioning part, wherein one end of the first locking positioning part is directly or indirectly connected with a heat-insulating sheath 11, and the other end of the first locking positioning part can be controlled to be locked on the second locking positioning part; the second locking positioning element can be controlled to limit the relative sliding between the first locking positioning element and the needle bar.
In one embodiment, one end of the first locking and positioning member is indirectly connected to the thermal insulation sheath 11 through the sealing and pressing member.
In one embodiment, the first locking locator comprises: a first positioning member 41, a first locking member 42; the second locking positioning member comprises: a second positioning member 43, a second locking member 44; the distal end of the first positioning element 41 is connected to the sheath tube connecting element 31, the proximal end of the first positioning element 41 is sleeved on the second positioning element 43, the first positioning element and the second positioning element can coaxially and relatively move, and the distal end of the first positioning element 43 is the end of the first positioning element 41 close to the needle point 211; the first locking member is sleeved on the first positioning member 41 and can be controlled to lock, so that the proximal end of the first positioning member 41 is locked on the second positioning member 43; the second positioning member 43 is sleeved on the needle shaft 21, and the second locking member 44 is sleeved on the proximal end of the second positioning member 43 and can be controlled to lock so as to lock the proximal end of the second positioning member 43 on the needle shaft 21; the proximal end of the second positioning member 43 is the end of the second positioning member 43 distal to the needle tip 211.
The locking and positioning member 4 in the above embodiment plays a role in fixing the heat-insulating sheath 11 and the ablation needle part 2, that is, fixing the length of the current target area; on the other hand, the locking positioning piece 4 can isolate the temperature, and plays a role of double-layer protection together with an interlayer between the needle rod and the vacuum wall inner tube, thereby further protecting the safety of operators.
In one embodiment, the connection between the first positioning element 41 and the sheath tube connecting element 31 is fixed by luer fitting, specifically: the distal end of the first positioning element 41 is a luer connector, and is fixed in a matching manner with the luer connector arranged at the proximal end of the sheath tube connecting element 31.
In one embodiment, the proximal end of the first positioning member 41 has a multi-claw structure, and the first locking member 42 is controlled to lock and force the multi-claw structure of the first positioning member 41 to retract inwardly to grip the second positioning member 43. And/or the proximal end of the second positioning member 43 can be a multi-claw structure, and the multi-claw structure of the second positioning member 43 can be forced to contract inwards to grip the needle shaft 21 when the second locking member 44 is controlled to be locked.
In one embodiment, the multi-jaw structure of the first positioning member 41 is provided with an inclination angle, and the first locking member 42 is also provided with an inclination angle, which can force the multi-jaw structure to contract inwards when the first locking member 42 is rotated to lock. And/or the multi-jaw structure of the second positioning member 43 is provided with an inclination angle, and the second locking member 44 is also provided with an inclination angle capable of forcing the multi-jaw structure to contract inwards when the second locking member 44 is rotated to lock.
In an embodiment, the second positioning element is provided with a scale, please refer to fig. 6, which can indicate the length of the current target area.
The locking and positioning element has various structures, and is not limited to the structure used in the above embodiments, such as: locking positioning nails, positioning pins or sliding blocks can be used for positioning.
The ablation needle part of the above embodiment may be a cryoablation needle, or may be other medical products, such as: the ablation needle can be a radio frequency ablation needle, a microwave ablation needle and the like, and can also be a biopsy needle. The switching of diagnosing the product as the difference can be accomplished very easily to the cooperation above-mentioned sheath pipe portion, has realized the biopsy and the ablation of single passageway, avoids the injury that secondary puncture brought for patient.
The ablation needle of the above embodiments is suitable for use in both cryoablation devices and devices based on thermal conduction ablation. In addition, as a cryoablation device, the device includes, but is not limited to, a device based on joule thomson principle, a device based on liquid nitrogen delivery principle; as a thermally conductive ablation device, devices including, but not limited to, water vapor, alcohol vapor delivery principles.
In an embodiment, there is also provided an ablation system comprising: the ablation needle of any of the above embodiments.
In the description herein, reference to the terms "an implementation," "an embodiment," "a specific implementation," "an example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (15)

1. An ablation needle, comprising: an ablation needle part and a heat insulation sheath tube; wherein the content of the first and second substances,
the ablation needle portion includes: the needle comprises a needle rod, a vacuum wall inner tube and an air inlet tube, wherein the far end of the needle rod is provided with a needle point;
the heat insulation sheath pipe is sleeved on the needle rod; the heat-insulating sheath tube is detachably connected with the needle rod;
a preset distance is reserved between the distal end of the needle rod and the distal end of the heat-insulating sheath tube, and a section of area where the preset distance is located is a target area; the far end of the heat-insulating sheath tube is the end of the heat-insulating sheath tube close to the needle point;
the vacuum wall inner tube penetrates through the needle rod, an interlayer is formed between the vacuum wall inner tube and the needle rod, and the interlayer is an interlayer capable of forming vacuum;
the air inlet pipe is inserted into the needle rod, the far end of the air inlet pipe extends into the targeting area, and the far end of the air inlet pipe is close to one end of the needle point.
2. The ablation needle of claim 1, wherein the thermally-insulating sheath comprises: an outer sheath layer and an inner sheath layer;
the sheath pipe outer layer is sleeved on the sheath pipe inner layer, a sheath pipe interlayer is formed between the sheath pipe outer layer and the sheath pipe inner layer, and the sheath pipe interlayer is a vacuum interlayer capable of being formed.
3. The ablation needle of claim 2, wherein the distal end face of the temperature-insulating sheath is provided with a chamfer.
4. The ablation needle of claim 1, further comprising: the handle portion, the handle portion includes sheath pipe connecting piece, sheath pipe connecting piece with it links to each other to separate the temperature sheath pipe.
5. The ablation needle of claim 4, wherein the handle portion further comprises: a seal assembly;
the proximal end of the sheath tube connecting piece extends out of the proximal end of the heat-insulating sheath tube, and the proximal end of the needle bar extends out of the proximal end of the heat-insulating sheath tube; the proximal end of the sheath tube connecting piece is one end of the sheath tube connecting piece, which is far away from the needle tip;
the sealing assembly is used for isolating the inner space and the outer space of the handle part.
6. The ablation needle of claim 5, wherein the seal assembly comprises: a sealing ring, a sealing ring pressing piece, wherein,
the sealing ring can be sleeved on the needle rod, and the sealing ring pressing piece is pressed on the outer wall of the sealing ring.
7. The ablation needle of claim 5, wherein the handle portion further comprises: a suction interface;
a suction cavity is formed in a gap between the needle rod and the heat insulation sheath tube;
one end of the suction interface is connected with the suction cavity.
8. The ablation needle of any one of claims 1 to 7, wherein the needle shaft and the temperature-insulating sheath are relatively slidable along an axial direction of the needle shaft to adjust a length of the target region.
9. The ablation needle of claim 8, further comprising: and the locking positioning piece can be controlled to limit the relative sliding between the needle rod and the heat-insulation sheath.
10. The ablation needle of claim 9, wherein the locking and positioning member comprises: a first locking and positioning part and a second locking and positioning part, wherein,
one end of the first locking and positioning piece is directly or indirectly connected with the heat-insulating sheath tube, and the other end of the first locking and positioning piece can be controlled to be locked on the second locking and positioning piece;
the second locking positioning part can be controlled to limit the relative sliding between the first locking positioning part and the needle rod.
11. The ablation needle of claim 10, wherein the first locking locator comprises: a first positioning member, a first locking member;
the second locking and positioning member comprises: a second positioning part and a second locking part; wherein the content of the first and second substances,
the far end of the first positioning piece is directly or indirectly connected with the heat-insulating sheath tube, and the near end of the first positioning piece is sleeved on the second positioning piece; the far end of the first positioning piece is one end of the first positioning piece close to the needle point;
the first locking piece is sleeved on the first positioning piece and can be controlled to lock, so that the proximal end of the first positioning piece is locked on the second positioning piece;
the second positioning piece is sleeved on the needle rod, and the second locking piece is sleeved on the proximal end of the second positioning piece and can be controlled to lock so as to lock the proximal end of the second positioning piece on the needle rod; the proximal end of the second positioning piece is the end of the second positioning piece far away from the needle point.
12. The ablation needle of claim 11, wherein the direct or indirect connection between the first positioning member and the thermally insulating sheath is secured by a luer fitting.
13. The ablation needle of claim 11, wherein the proximal end of the first positioning member is a multi-claw structure, and the first locking member is controlled to lock so as to force the multi-claw structure of the first positioning member to contract inwardly to grip the second positioning member;
and/or the presence of a gas in the gas,
the proximal end of the second positioning piece is of a multi-claw structure, and when the second locking piece is controlled to be locked, the multi-claw structure of the second positioning piece can be forced to contract inwards to grasp the needle rod.
14. The ablation needle of claim 11, wherein the second positioning member has a scale disposed thereon.
15. An ablation system, comprising: the ablation needle of any of claims 1 to 14.
CN202210504404.9A 2022-05-10 2022-05-10 Ablation needle and ablation system Pending CN114711946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210504404.9A CN114711946A (en) 2022-05-10 2022-05-10 Ablation needle and ablation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210504404.9A CN114711946A (en) 2022-05-10 2022-05-10 Ablation needle and ablation system

Publications (1)

Publication Number Publication Date
CN114711946A true CN114711946A (en) 2022-07-08

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Family Applications (1)

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CN202210504404.9A Pending CN114711946A (en) 2022-05-10 2022-05-10 Ablation needle and ablation system

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