CN114601554B - Ablation needle and ablation system - Google Patents
Ablation needle and ablation system Download PDFInfo
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- CN114601554B CN114601554B CN202210504645.3A CN202210504645A CN114601554B CN 114601554 B CN114601554 B CN 114601554B CN 202210504645 A CN202210504645 A CN 202210504645A CN 114601554 B CN114601554 B CN 114601554B
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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
- A61B18/04—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
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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
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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
- A61B18/04—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
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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
- A61B18/18—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
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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
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
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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
- 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
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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
- A61B18/04—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
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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
- A61B18/18—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
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- 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
Abstract
The present invention provides an ablation needle comprising: an ablation needle part and a heat insulation sheath tube; the ablation needle portion includes: the needle rod and the air inlet pipe are arranged, and the far end of the needle rod is provided with a needle point; the heat insulation sheath pipe is sleeved on the ablation needle part; 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 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, heat insulation/cold insulation is realized through the sheath pipe part outside the needle rod, the vacuum wall is not arranged in the needle rod any longer, and the needle rod and the sheath pipe part form independent components, so that the diameter of the needle rod can be greatly reduced, and the operation wound is reduced.
Description
Technical Field
The invention relates to the technical field of ablation, in particular to an ablation needle and an ablation system.
Background
The diameter of the ablation needle determines the wound size of the tumor needle channel, and generally, a coaxial air inlet pipeline (such as a J-T groove) and a return air pipeline, a vacuum heat insulation wall, a temperature measuring line and other parts need to be installed in the cryoablation needle, so that the diameter of the ablation needle is difficult to be thin, the puncture wound is large, bleeding is large, and tumor needle channel metastasis is easy to induce. Therefore, reducing the diameter of the needle track inside the tumor, i.e., reducing the diameter of the targeted area (effective freezing area) of the ablation needle, has significant clinical significance.
The existing ablation needle mostly adopts a structure that a needle rod is arranged outside and inside a vacuum wall, and the inner diameter of the needle rod is required to be larger than the outer diameter of the vacuum wall, so that the diameter of the needle rod is difficult to be thinned.
Disclosure of Invention
The invention provides an ablation needle and an ablation system, and aims to solve the problem that the diameter of a needle rod is difficult to thin in the prior art.
According to a first aspect of the present 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 rod and the air inlet pipe are arranged, and the far end of the needle rod is provided with a needle point;
the heat insulation sheath pipe is sleeved on 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 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.
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: the sealing device comprises a first sealing component and a second sealing component;
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 first sealing assembly is used for sealing a gap between the sheath tube connecting piece and the needle rod;
the second sealing assembly is used for isolating the inner space and the outer space of the handle part.
Preferably, the first seal assembly comprises: a seal ring, a seal ring pressing member, wherein,
the sealing ring is sleeved on the needle rod, and the sealing ring pressing piece is arranged on the outer wall of the sealing ring in a pressing mode and plays a role in pressing the sealing ring;
and/or the presence of a gas in the gas,
the second seal assembly includes: 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 to play a role in pressing 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 thermal insulation sheath so as to fix the length of the current target area.
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 thermal insulation sheath, 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 piece and a second locking piece; 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 system provided by the invention, heat insulation/cold insulation is realized through the sheath tube part outside the needle rod, the vacuum wall is not arranged in the needle rod any more, and the needle rod and the vacuum wall form independent parts respectively, so that the diameter of the needle rod can be as thin as possible, the needle channel (wound) in the tumor is minimum, and the risks of bleeding and metastasis are effectively reduced.
According to the ablation needle and the system provided by the invention, the ablation needle part can be a cryoablation needle, and can also be other diagnosis and treatment products, such as: the 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.
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 an ablation needle according to an embodiment of the invention;
FIG. 3 is a schematic view of a chamfer of a thermal-insulating sheath according to an embodiment of the present invention;
FIG. 4 is a schematic view of an ablation needle according to another embodiment of the invention;
FIG. 5 is a schematic view of an aspiration lumen according to another embodiment of the present invention;
FIG. 6 is a schematic view of a locking positioning member according to an embodiment of the present invention;
description of reference numerals:
1-a sheath tube part, wherein,
11-a heat-insulating sheath tube, wherein,
111-the outer layer of the sheath tube,
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,
25-ablation needle outer wall;
3-a handle part, wherein the handle part,
31-a sheath tube connecting piece, wherein,
32-a sealing ring is arranged on the inner side of the shell,
33-a sealing ring pressing piece,
34-a sealing ring, which is arranged on the inner wall of the cylinder,
35-a sealing ring pressing piece,
36-a suction interface;
4-locking the positioning piece to the position,
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 for the second part,
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 tube part 1 and an ablation needle part 2, please refer to fig. 1. Wherein, sheath portion 1 includes: a heat-insulating sheath tube 11; the ablation needle portion includes: the needle rod 21 and the air inlet pipe 22, wherein the distal end of the needle rod 21 is provided with a needle point 211; the heat insulation sheath 11 is sleeved on 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. 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.
In the ablation needle of the embodiment, the heat-insulating sheath tube and the needle rod are independently arranged, the heat-insulating sheath tube is arranged on the outer wall of the needle rod, and a vacuum wall is not required to be arranged in the needle rod, so that the diameter of the needle rod can be as thin as possible; in addition, the independent needle rod can realize biopsy and ablation of a single needle channel, the biopsy and the ablation only need to be punctured once, and the puncturing frequency can be reduced, so that complications such as bleeding, transfer, pneumothorax and the like caused by the increase of the puncturing frequency are avoided.
In one embodiment, the thermal insulation sheath 11 includes: a sheath outer layer 111 and a sheath inner layer 112; the sheath outer layer 111 is sleeved on the sheath inner layer 112, a sheath interlayer is formed between the sheath outer layer 111 and the sheath inner layer 112, and the sheath interlayer is a vacuum interlayer.
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: the sealing device comprises a first sealing component and a second sealing component; 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 first seal assembly is used for sealing the gap between the sheath connector 31 and the needle bar 21; the second sealing component is used for isolating the inner space and the outer space of the handle part. .
In one embodiment, a first sealing assembly is disposed between the needle shaft 21 and the sheath connector 31, and comprises: a sealing ring 32 and a sealing ring pressing member 33, wherein the sealing ring 32 is sleeved on the needle rod 21, the sealing ring pressing member 33 is pressed on the outer wall of the sealing ring 32, please refer to fig. 3, the sealing ring pressing member 33 is used for pressing the sealing ring 32 to limit the axial movement thereof. And/or, the second seal assembly comprises: a seal ring 34 and a seal ring presser 35. Naturally, the central cavity of the sealing ring 34 is in a closed state, isolating the inner and outer spaces of the handle 3; 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 34 to expand, the sealing ring 34 tightly wraps the needle rod, the sealing ring pressing piece 35 is pressed on the outer wall of the sealing ring 34, and the sealing ring pressing piece 35 is used for pressing the sealing ring 34 to limit the movement of the sealing ring 34.
In one embodiment, the seal ring 32 is preferably a floating seal ring, which can perform a radial sealing function at a low temperature, and the temperature of the needle shaft 21 is extremely low (e.g., -196 ℃ to-60 ℃) during the freezing process, so that the (floating) seal ring 32 can seal the gap between the heat-insulating sheath tube 11 and the needle shaft 21 in the frozen state. The sealing ring 34 is preferably a silica gel sealing ring with a self-sealing function, and the sealing ring plays a sealing role in the high temperature or not too low temperature range (such as-60 ℃ to 250 ℃) of the needle rod. The combined action of the sealing ring 32 and the sealing ring 34 ensures that the sealing can be effectively performed in a temperature range from low temperature to high temperature (such as-196 ℃ to 250 ℃).
In one embodiment, the handle portion further comprises: a suction interface 36; 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 36 is connected to the suction chamber 13, see fig. 4. The other end of the suction port 36 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, effusion, blood or gas overflowing from pneumothorax in the patient can all circulate to the outside of the suction interface 36 through the suction cavity 13, thereby preventing 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 part 4, wherein the locking positioning part 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; wherein, 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 two positioning elements 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 positioning part 4 in the above embodiment plays a role of fixing the thermal insulation sheath 11 and the ablation needle part 2, namely fixing the length of the current target area; on the other hand, as the needle rod 21 is not provided with a vacuum interlayer, the locking positioning piece 4 can isolate the temperature, thereby 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-jaw structure, and the first locking member 42 is controlled to lock and force the multi-jaw 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 capable of forcing the multi-jaw structure to contract inward 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, sliding blocks and the like can be adopted for positioning.
In one embodiment, to protect the needle shaft, the outer wall of the proximal portion of the needle shaft is further provided with an ablation needle outer wall 25, and the second positioning member 43 is disposed around the ablation needle outer wall 25, as shown in fig. 4.
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 (11)
1. An ablation needle, comprising: an ablation needle part and a heat insulation sheath; wherein the content of the first and second substances,
the ablation needle portion includes: the needle rod and the air inlet pipe are arranged, and the far end of the needle rod is provided with a needle point;
the heat insulation sheath pipe is sleeved on 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 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 one end, close to the needle point, of the air inlet pipe;
the needle rod and the thermal insulation sheath tube can relatively slide along the axial direction of the needle rod so as to adjust the length of the targeting region;
further comprising: the locking positioning piece can be controlled to limit the relative sliding between the needle rod and the heat-insulation sheath;
the locking positioning piece 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 piece can be controlled to limit the relative sliding between the first locking positioning piece and the needle rod;
the first locking locator includes: 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.
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: handle portion, 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: the sealing device comprises a first sealing component and a second sealing component;
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 first sealing assembly is used for sealing a gap between the sheath tube connecting piece and the needle rod;
the second 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 first seal assembly comprises: a seal ring, a seal ring pressing member, wherein,
the sealing ring is sleeved on the needle rod, and the sealing ring pressing piece is pressed on the outer wall of the sealing ring;
and/or the presence of a gas in the gas,
the second seal assembly includes: 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 claim 1, wherein the direct or indirect connection between the first locator and the temperature-insulating sheath is secured in place by a luer fitting.
9. The ablation needle of claim 1, 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 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.
10. The ablation needle of claim 1, wherein the second positioning member has a scale disposed thereon.
11. An ablation system, comprising: the ablation needle of any of claims 1 to 10.
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| CN202210504645.3A CN114601554B (en) | 2022-05-10 | 2022-05-10 | Ablation needle and ablation system |
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| CN211934274U (en) * | 2019-11-29 | 2020-11-17 | 杭州堃博生物科技有限公司 | Adjustable curved electrotome device based on ablation anchoring |
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| AU2005262541B2 (en) * | 2004-06-16 | 2011-04-21 | Cook Incorporated | Thoracic deployment device and stent graft |
| CN103070740B (en) * | 2005-03-28 | 2015-07-08 | 泰尔茂株式会社 | Body organ expansion instrument |
| US8517955B2 (en) * | 2009-05-08 | 2013-08-27 | Broncus Medical Inc. | Tissue sampling devices, systems and methods |
| JP2014087378A (en) * | 2011-02-23 | 2014-05-15 | Olympus Medical Systems Corp | Treatment tool for endoscope |
| CN102488576B (en) * | 2011-11-25 | 2014-07-16 | 北京华脉泰科医疗器械有限公司 | Convey and release device for covered stents |
| CN110507405A (en) * | 2019-08-13 | 2019-11-29 | 上海导向医疗系统有限公司 | The cryoablation needle of adjustable targeting district |
| CN113633344A (en) * | 2020-05-11 | 2021-11-12 | 上海蓝脉医疗科技有限公司 | Thrombus removing device |
| CN113842202A (en) * | 2020-06-26 | 2021-12-28 | 天津美电医疗科技有限公司 | Ablation probe with freezing function |
| CN214157488U (en) * | 2020-10-27 | 2021-09-10 | 海杰亚（北京）医疗器械有限公司 | Cryoablation needle with variable cold area |
| CN112168338A (en) * | 2020-10-29 | 2021-01-05 | 四川大学华西医院 | Intracavity ablation device |
| CN215739695U (en) * | 2020-12-30 | 2022-02-08 | 先健科技(深圳)有限公司 | Sheath pipe assembly and conveying device |
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| CN211934274U (en) * | 2019-11-29 | 2020-11-17 | 杭州堃博生物科技有限公司 | Adjustable curved electrotome device based on ablation anchoring |
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