CN115192173A - Ablation needle with adjustable needle head position - Google Patents
Ablation needle with adjustable needle head position Download PDFInfo
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- CN115192173A CN115192173A CN202210793270.7A CN202210793270A CN115192173A CN 115192173 A CN115192173 A CN 115192173A CN 202210793270 A CN202210793270 A CN 202210793270A CN 115192173 A CN115192173 A CN 115192173A
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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
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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
- A61B2018/00982—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes
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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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Abstract
The invention provides an ablation needle with an adjustable needle head position, which comprises: a needle head part and an ablation needle part; the needle head portion includes: a needle head, a needle head control part; the far end of the needle head control part penetrates through the ablation needle part, the far end of the needle head control part is connected with the needle head, and the far end of the needle head control part is one end, close to the needle head, of the needle head control part; the needle head control part is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part; the needle is configured to be controlled to move towards the far end, so that the far end of the needle is extended out of the ablation needle part, and the near end of the needle is not pulled out of the ablation needle part; from the far end to the near end of the ablation needle part, the inside of the ablation needle part is divided into a target area and a temperature insulation area; a section of the ablation needle portion located at the thermal insulation zone is configured to insulate the interior thereof from the exterior. According to the invention, the purposes of no need of a sheath tube and reduction of the diameter of the ablation needle are achieved by arranging the heat insulation in the non-treatment area and combining the scheme of telescopic needle heads.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an ablation needle with an adjustable needle head position.
Background
The existing tumor ablation treatment comprises two needle inserting modes of percutaneous puncture treatment and treatment through a natural cavity of a human body, and the percutaneous puncture treatment method is widely applied to the ablation treatment of tumors of all parts of the human body. However, for the treatment of focus of some special parts, such as central lung lesion, mediastinal lymph node, pancreatic tumor, etc., the treatment path through the natural orifice of the human body is a better choice, the ablation needle can safely and smoothly reach the tumor part through the natural orifice of the human body, and the potential safety hazard caused by percutaneous puncture is avoided.
The ablation instrument is basically a structure of a flexible catheter and an ablation needle head, and the instrument does not have puncture capability due to the fact that the flexible catheter section is too soft, so that the needle head can only be placed in a natural cavity of a human body to perform tumor ablation. If the natural orifice does not pass through the inside of the tumor or the edge of the tumor, the natural orifice cannot be punctured or other auxiliary devices (puncture sheaths) are needed to establish a channel for ablation, but the method of the auxiliary channel inevitably causes an overlarge wound.
Compared with other thermal ablation means, the cryoablation has the advantages of painless ablation, clear ablation boundary under the imaging, no damage to fiber architecture, excitation of systemic immunity and the like. Regardless of percutaneous cryopuncture treatment and cryotherapy through the natural orifice of the human body, it is desirable that the ablation needle has a smaller diameter as well as a better diameter, so as to avoid complications such as bleeding caused by an excessively large puncture wound. The existing percutaneous cryoablation is provided with a vacuum heat insulation layer inside a puncture needle to prevent additional frostbite on normal tissues of a human body, the technology adopts a double-layer coaxial sleeve and an interlayer vacuumizing mode to realize heat insulation, and in addition, an internal air inlet pipeline is provided, a needle rod section of the internal air inlet pipeline is provided with a three-layer coaxial metal pipe, and the diameter of the three-layer coaxial metal pipe is relatively easy to be thinned by a three-layer coaxial sleeve organ structure on a percutaneous puncture instrument. However, the existing cryoablation apparatus passing through the natural orifice of the human body adopts the structure of an ablation needle and a sheath tube, the sheath tube is used for collecting the needle head into the sheath, the needle head is prevented from damaging a working channel or normal tissues of an endoscope when entering the endoscope or the natural orifice of the human body, and when the needle head needs to be punctured near a focus, the ablation needle is pushed out of the sheath tube for puncturing. Because the sheath is a sleeve with multiple parts, the sheath is generally made of a non-metal material in order to not affect the flexibility of the instrument, and the thickness of the non-metal tube is difficult to be thinned, so that the diameter of the instrument is difficult to be thinned, overlarge wounds and more serious complications can be caused, and the instrument is not favorable for being matched with an endoscope with a thinner working channel to carry out cryoablation treatment, for example, being matched with a bronchoscope to carry out cryoablation through a respiratory tract of a human body.
Disclosure of Invention
The invention provides an ablation needle with an adjustable needle head position, and aims to solve the problem that an existing ablation needle cannot be thinned.
The invention provides an ablation needle with an adjustable needle head position, which comprises: a needle head part and an ablation needle part; wherein,
the tip segment includes: a needle head and a needle head control part;
the far end of the needle head control part penetrates through the ablation needle part, the far end of the needle head control part is connected with the needle head, and the far end of the needle head control part is one end, close to the needle head, of the needle head control part;
the needle head control part is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part;
the needle is configured to be controlled to move distally so that the distal end of the needle protrudes out of the ablation needle portion and the proximal end of the needle does not fall out of the ablation needle portion;
from the far end to the near end of the ablation needle part, the inside of the ablation needle part is divided into a targeting area and a temperature insulation area;
a section of the ablation needle portion located at the thermal insulation zone is configured to be capable of insulating between an interior and an exterior thereof.
Preferably, the needle control part is further used for controlling the needle to move towards the far end, so that the far end of the needle extends out of the ablation needle part.
Preferably, the needle control portion includes: the distal end of the spring is connected with the needle head, and the proximal end of the spring is fixed relative to the position of the ablation needle part;
during proximal movement of the needle, the spring is in a compressed state.
Preferably, the method further comprises the following steps: the needle head sealing part is arranged between the needle head and the ablation needle part and used for enabling the needle head and the ablation needle part to form dynamic sealing.
Preferably, the needle seal comprises: radial seals, axial seals.
Preferably, the needle control portion includes: a needle control member, a needle control extension member; wherein,
the far end of the needle head control piece penetrates through the ablation needle part, the far end of the needle head control piece is connected with the needle head, and the far end of the needle head control piece is one end, close to the needle head, of the needle head control piece;
the far end of the needle head control extension piece is connected with the near end of the needle head control piece, and the far end of the needle head control extension piece is one end, close to the needle head, of the needle head control extension piece;
the needle control extension is thicker than the needle control.
Preferably, the needle control portion includes: an air inlet pipe;
the far end of the air inlet pipe penetrates through the ablation needle part, the far end of the air inlet pipe is connected with the needle head, and the far end of the air inlet pipe is one end, close to the needle head, of the air inlet pipe;
the intake pipe has: at least one radial gas outlet hole located within the targeting zone;
the needle head control part is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part, and the method specifically comprises the following steps: the air inlet pipe is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part.
Preferably, the needle control portion further comprises: an intake pipe control member connected to the intake pipe;
the air inlet pipe is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part, and the method specifically comprises the following steps: the air inlet pipe control part is used for controlling the air inlet pipe to drive the needle head to move towards the near end so as to retract into the ablation needle part.
Preferably, one section of the air inlet pipe is of a spiral pipe structure;
the air inlet pipe control part is connected with the air inlet pipe, and specifically comprises the following steps: the air inlet pipe control part is connected with the far end of the spiral pipe structure.
Preferably, the method further comprises the following steps: the far end of the air inlet extension pipe is connected with the near end of the air inlet pipe, and the far end of the air inlet extension pipe is one end, close to the needle, of the air inlet extension pipe;
the air inlet extension pipe is thicker than the air inlet pipe.
Preferably, the method further comprises the following steps: the proximal end of the ablation needle part penetrates through the handle part.
Preferably, the handle portion includes: the handle comprises a handle inner layer, a handle far-end outer layer and a handle near-end outer layer;
the far end of the handle inner layer is arranged on the handle far end outer layer in a penetrating mode, the near end of the handle inner layer is arranged on the handle near end outer layer in a penetrating mode, and the far end of the handle inner layer is one end, close to the needle, of the handle inner layer;
a preset distance is reserved between the near end of the outer layer at the far end of the handle and the far end of the outer layer at the near end of the handle;
the outer layer of the distal end of the handle is configured to be connected with the instrument to be matched, so that the ablation needle part can extend out of the handle part and be inserted into the instrument to be matched;
the outer layer of the near end of the handle is connected with the needle head control part;
the outer layer at the far end of the handle and the inner layer of the handle can be controlled to move along the axis direction of the inner layer of the handle;
the outer layer at the near end of the handle and the inner layer of the handle can be controlled to move along the axis direction of the inner layer of the handle.
Preferably, the handle portion further comprises: the far-end locking piece and the near-end locking piece are arranged on the front end of the shell;
the distal locking piece is used for locking the relative position between the outer layer at the distal end of the handle and the inner layer of the handle;
the proximal locking piece is used for locking the relative position between the outer layer at the proximal end of the handle and the inner layer of the handle.
Preferably, the handle portion includes: the ablation needle bending protection piece is arranged between the outer wall of the ablation needle part and the inner wall of the handle part.
Preferably, the method further comprises the following steps: the far end of the gradual change pipe is connected with the near end of the ablation needle part, and the far end of the gradual change pipe is one end of the gradual change pipe close to the needle head;
the inner diameter of the gradual change pipe is larger than that of the ablation needle part.
Preferably, the needle rod and the vacuum wall inner tube are metal tubes.
According to the ablation needle with the adjustable needle head position, the needle head is arranged in a telescopic manner, and the ablation needle part of the coaxial sleeve is combined, so that the needle head can be retracted into the needle rod when entering a human body along an endoscope or a natural cavity, the endoscope or normal tissues cannot be damaged, and the whole non-treatment area of the ablation needle part of the coaxial sleeve is provided with a vacuum heat insulation structure; therefore, the ablation needle can be made thin without an additional sheath.
In one alternative scheme of the invention, the spring is arranged on the needle head control part, the spring is in a compressed state when the needle head control part pulls the needle head to move towards the near end, and after the pulling force of the needle head control part is cancelled, the needle head is pushed to slowly move towards the far end in place under the action of the restoring force of the spring, so that smaller and more stable pushing force can be provided by utilizing the restoring force of the spring, the too fast impact of the needle head towards the far end can be prevented, and the too fast or too violent needle head impact can possibly damage an apparatus or a patient; and after the needle head moves to the far end in place, the spring provides certain pretightening force for the needle head, so that the needle head can be prevented from retracting during puncture.
In an alternative of the invention, the air inlet pipe is used as the needle head control part or part of the needle head control part, so that parts are saved, and the needle rod can be made thinner.
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 a needle-tip-out of an ablation needle with adjustable needle tip position according to an embodiment of the present invention;
FIG. 2 is a schematic view of needle retraction of an ablation needle with adjustable needle tip position according to an embodiment of the present invention;
FIG. 3 is a schematic view of an ablation needle with adjustable needle tip position according to an embodiment of the present invention;
FIG. 4 is a schematic view of an ablation needle with adjustable needle tip position according to another embodiment of the present invention;
FIG. 5 is a schematic view of a handle portion of an adjustable needle tip ablation needle in accordance with another embodiment of the present invention;
description of reference numerals:
1-a needle head part, wherein,
11-a needle head, wherein the needle head is arranged on the needle head,
12-a needle control member, which is,
13-the needle-sealing part of the syringe,
131-a radial seal member-the radial seal member,
132-an axial seal member-the axial seal member,
14-a spring, which is provided with a spring,
15-needle control extension;
2, the ablation needle part is arranged on the needle body,
the 2' -targeting region of the polypeptide,
21-a needle bar is arranged at the bottom of the needle,
211-rounding off the corners of the edges,
22-an area of thermal insulation,
221-an outer tube of a vacuum wall,
222-the inner tube of the vacuum wall,
23-an air inlet pipe,
231-an air outlet hole which is provided with a plurality of air outlets,
24-a gradual-change pipe, wherein,
25-the control of the air inlet duct,
26-an air inlet extension pipe, wherein,
27-a gas return pipe, wherein the gas return pipe is arranged on the gas return pipe,
28-the sealing assembly,
281-sealing the extension pipe,
282-a sealing cap-which is,
283-a sealing ring, wherein the sealing ring is arranged on the upper surface of the upper cover,
284-a gasket retaining member;
3-a handle part, wherein the handle part,
31-the inner layer of the handle,
32-the outer layer of the distal end of the handle,
33-the outer layer of the proximal end of the handle,
34-the distal end-retaining member,
35-a bending protection part of the ablation needle,
36-a luer joint of a female luer and a male luer,
37-proximal 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 should be understood that the terms "upper", "lower", "upper surface", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, merely for convenience of description and simplification 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, should not 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. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
In one embodiment, an ablation needle with an adjustable needle tip position is provided, comprising: a needle head part 1 and an ablation needle part 2, please refer to fig. 1 and fig. 2. Wherein, the tip segment 11 includes: a needle 11 and a needle control part. The needle head control part includes: the distal end of the needle control part 12 penetrates through the ablation needle part 2, the distal end of the needle control part 12 is connected with the needle 11, and the distal end of the needle control part 12 is the end, close to the needle 11, of the needle control part. The needle control part is used for controlling the needle to move towards the proximal end so as to retract into the ablation needle part, please refer to fig. 2. The needle is configured for controlled distal movement such that the distal end of the needle protrudes out of the ablation needle portion and the proximal end of the needle does not fall out of the ablation needle portion, see fig. 1.
Wherein, from the far end to the near end of the ablation needle part, the inside of the ablation needle part is divided into a target area 2' and a thermal insulation area 22; a section of the ablation needle portion located at the thermal insulation zone is configured to be capable of insulating between an interior and an exterior thereof.
The manner of connecting the needle 11 and the needle control member 12 is not limited, and examples thereof include soldering, high-frequency welding, laser welding, bonding, screwing, and the like.
In one embodiment, the ablation needle part of the thermal insulation area is realized in the form of a double-layer vacuum wall tube, specifically: the section of the ablation needle part positioned in the temperature insulation area comprises at least two layers of coaxial vacuum wall tubes, an interlayer is formed between the two layers of vacuum wall tubes, and the interlayer is an interlayer capable of forming vacuum.
The connection between the two vacuum wall pipes can be welding, including but not limited to vacuum brazing, vacuum laser welding, vacuum high frequency welding, vacuum electron beam welding, etc.
The material of the two vacuum wall tubes is preferably metal memory alloy, such as nickel-titanium alloy, cobalt-chromium alloy and the like.
In one embodiment, the needle control portion is further configured to control the distal movement of the needle 11 such that the distal end of the needle 11 protrudes out of the ablation needle portion.
In one embodiment, an ablation needle at the target zone includes: a needle shaft 21, an ablation needle portion located at the heat insulation region includes: the vacuum wall inner tube 221 and the vacuum wall outer tube 222 are coaxial, and an interlayer is formed between the vacuum wall inner tube 221 and the vacuum wall outer tube 222.
In this case, the needle shaft 21 and the vacuum wall outer tube 222 may be of an integral structure, that is, the ablation needle portion 2 is of an integral structure when viewed from the outside. In various embodiments, the needle shaft 21 and the vacuum wall outer tube 222 may be connected to each other.
In one embodiment, the needle control member 12 may be a wire, rod or tube-like structure, including but not limited to stainless steel, nitinol, etc.
In one embodiment, distal movement of the needle to project the distal end of the needle out of the ablation needle portion may be achieved by the needle control 12 pushing the needle control to move the needle distally. In different embodiments, a gas with certain pressure is introduced into the ablation needle part to push the needle head to move towards the far end.
In one embodiment, the distal movement of the needle to extend the distal end of the needle out of the ablation needle portion can also be achieved by the urging force of a spring. Specifically, the needle head control portion includes: a spring 14, the distal end of the spring 14 is connected to the needle 11, and the proximal end of the spring 14 is fixed in position relative to the ablation needle portion, see fig. 3. During proximal movement of the needle 11, the spring is in a compressed state. After the needle 11 moves to the far end in place, the spring 14 can be in a natural state or a compressed state, and the spring 14 provides a certain pretightening force for the needle, so that the needle 11 can be prevented from retracting during puncture.
The thrust through the spring promotes the syringe needle and to the distal end motion, can provide littleer and more steady thrust, prevents to let in gas alone and causes the too fast impact of syringe needle to the distal end, and too fast or too violent syringe needle impact can cause the damage to apparatus or patient.
In one embodiment, during puncturing, if the puncturing force is too large and the pushing force of the spring is not enough, gas with certain pressure can be introduced into the ablation part to increase the pushing force of the needle head.
In one embodiment, the ablation needle with the adjustable needle head position further comprises: a needle sealing portion 13, the needle sealing portion 13 is disposed between the needle 11 and the ablation needle portion 2, please refer to fig. 1 and fig. 2. The sealing part 13 is used for forming dynamic sealing between the needle head 11 and the ablation needle part 2, and preventing frozen gas from overflowing the ablation needle.
In one embodiment, the needle sealing portion 13 may include: the radial seal, which serves as a radial seal, is shown in fig. 3.
In order to enhance the sealing effect, an axial sealing element 132 may be added on the basis of the radial sealing element 131, please refer to fig. 4, which respectively performs the radial sealing function and the axial sealing function. Where the radial seal 131 is a dynamic seal, i.e. it acts as a seal regardless of the position of the needle 11, the axial seal 132 only acts to enhance the seal when the needle is pushed fully forward.
The material and form of the needle seal 13 are not limited, and may be Teflon (Teflon) type material, such as Teflon, in the form of a flood plug seal, or a thin-walled circular tube or O-ring. The number of needle seals 13 is not limited.
In one embodiment, the needle control portion further comprises: needle control extension 15, see fig. 3. The distal end of the needle control extension is connected to the proximal end of the needle control member and the distal end of the needle control extension 15 is the end of the needle control extension 15 adjacent the needle 11. The needle control extension piece 15 is thicker than the needle control piece 12, so that the strength of the needle control part can be enhanced; in addition, the ablation needle can be conveniently led out of the flow channel of the ablation needle part and is convenient to seal when being led out. Needle control extension 15 and needle control member 12 may be integral or interconnected.
In one embodiment, the needle control member 12 may be located outside the air inlet conduit 23, inside the air inlet conduit 23, or in the air inlet conduit 23 itself.
In one embodiment, the needle control portion comprises: an intake pipe 23; the far end of the air inlet pipe 23 penetrates through the ablation needle part, the far end of the air inlet pipe 23 is connected with the needle head 11, and the far end of the air inlet pipe 23 is one end, close to the needle head 11, of the air inlet pipe 23. The intake pipe has: at least one radial gas outlet 231, the gas outlet 231 being located in the target region 2', gas being able to pass through the gas outlet 231 to the target region 2'. The needle head control part is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part, and the control method specifically comprises the following steps: the air inlet pipe 23 is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part.
In one embodiment, the needle control portion further comprises: an intake pipe control 25, the intake pipe control 25 being connected to the intake pipe 23, see fig. 4. The intake pipe is used for controlling the syringe needle to near-end motion to retract to melting the needle portion in specifically be: the air inlet pipe control part is used for controlling the air inlet pipe to drive the needle head to move towards the near end so as to retract into the ablation needle part.
In one embodiment, the needle control portion further comprises: see fig. 4 for the spring 14. The distal end of the spring 14 is connected to the needle 11 and the proximal end of the spring 14 is fixed in position relative to the ablation needle portion. During proximal movement of the needle 11, the spring is in a compressed state. After the needle 11 moves to the far end in place, the spring 14 can be in a natural state or a compressed state, and the spring 14 provides certain pretightening force for the needle, so that the needle 11 can be prevented from retracting during puncture.
In one embodiment, one section of the air inlet pipe 23 is a spiral pipe structure, please refer to fig. 5. The connection of the air inlet pipe control part and the air inlet pipe is specifically as follows: the inlet control member is coupled to the distal end of the coiled tubing structure. The far end of the air inlet pipe control piece 25 is fixed with the far end of the spiral pipe structure, when the air inlet pipe control piece 25 is pulled back, the spiral pipe structure is compressed, and the needle head 11 retracts into the needle rod 21; when it is desired to advance the needle 11, this can be achieved by the urging of the spring tube structure.
In summary, when the needle 11 needs to move distally, the movement can be achieved by pushing the air inlet control member 25 forward, under the pushing force of the spring 14, under the pushing force of the spiral tube structure, under the air pressure, or any combination thereof.
In one embodiment, the needle control portion further comprises: and an air inlet extension pipe 26, a distal end of the air inlet extension pipe 26 being connected to the proximal end of the air inlet pipe 23, and a distal end of the air inlet extension pipe 26 being an end of the air inlet extension pipe 26 close to the needle, as shown in fig. 5. The air inlet extension pipe 26 is thicker than the air inlet pipe 23, so that the strength of the needle head control part can be enhanced, the air inlet extension pipe can be conveniently led out of a flow channel of the ablation needle part, and the air inlet extension pipe is convenient to seal when being led out.
In one embodiment, the medium entering the target region 2' through the air inlet pipe can be returned through the gap between the air inlet pipe and the needle bar, or through the form of an air return pipe 27, see fig. 5.
In one embodiment, the ablation needle with the adjustable needle head position further comprises: the proximal end of the handle portion 3 and the ablation needle portion 2 are inserted into the handle portion 3, please refer to fig. 5. The handle part 3 can better protect the ablation needle part 2 and is more convenient for adjusting the needle head.
In one embodiment, in order to further facilitate the adjustment of the needle and also to facilitate the adjustment of the insertion of the ablation needle portion into other instruments, the handle portion 3 comprises: a handle inner layer 31, a handle distal end outer layer 32 and a handle proximal end outer layer 33, please refer to fig. 5. The far end of the handle inner layer 31 is arranged through the handle far end outer layer 32, the near end of the handle inner layer 31 is arranged through the handle near end outer layer 33, and the far end of the handle inner layer 31 is the end of the handle inner layer 31 close to the needle 11. The proximal end of the handle distal outer layer 32 is a predetermined distance from the distal end of the handle proximal outer layer 33. The handle distal outer layer 32 is configured to be coupled to an instrument to be mated (e.g., a luer 36 may be disposed on the interior of the distal end of the handle distal outer layer 32) to allow the ablation needle portion to extend beyond the handle portion and be inserted into the instrument to be mated (e.g., the instrument to be mated may be an endoscope). The handle proximal outer layer 33 is connected to the needle control.
The outer layer 32 at the far end of the handle and the inner layer 31 of the handle can be controlled to move along the axial direction of the inner layer 31 of the handle, so that the length of the ablation needle part 2 inserted into an apparatus to be matched can be adjusted. The handle proximal end outer layer 33 and the handle inner layer 31 can be controlled to move along the axial direction of the handle inner layer 31, and further the axial movement of the needle 11 can be controlled by the needle control part.
In one embodiment, the handle portion 3 further comprises: a distal retaining member 34, a proximal retaining member 37; the distal locking member 34 is used for locking the relative position between the handle distal outer layer 32 and the handle inner layer 31; the proximal locking member 37 is used to lock the relative position between the handle proximal outer layer 33 and the handle inner layer 31. To prevent relative movement when adjustment is not required.
The working process of the ablation needle of the embodiment is as follows: when the ablation needle is used together with an endoscope, an operator firstly sends the endoscope to the vicinity of a focus through a natural cavity of a human body, and positions the focus through direct vision of the endoscope or ultrasound probe or imaging. Next, the handle proximal end outer layer 33 is moved backward, the proximal locking button 37 is tightened to retract and fix the needle 11 to the inside of the needle shaft 21, then the ablation needle is inserted into the working channel of the endoscope to be fixed to the entrance of the working channel of the endoscope by the luer 36, and the handle distal end outer layer 31 is slid to adjust the length of the distal end of the needle shaft 21 extending out of the endoscope. When puncture is required, the proximal locking button 37 is released, the handle proximal outer layer 33 is controlled to move to the bottom towards the far end, the proximal locking button 37 is fixed, and the needle head 11 reaches the far end of the needle rod 21, and the needle head 11 is ensured not to retract when the ablation needle punctures. The outer layer 33 at the near end of the handle, namely the inner layer 31 of the handle, is pushed forward, so as to drive the ablation part 2 to move towards the far end for puncture, after the target area 2' is punctured to the focus position, the far end locking button 34 is fixed, and the freezing is started for ablation. After the ablation operation is finished, the proximal locking button 37 is released, the handle proximal outer layer 33 is moved backwards, the needle 11 is retracted into the needle rod 21, the proximal locking button 37 is fixed, and the instrument is extracted from the endoscope after the luer connector 36 is released.
In one embodiment, in order to better protect the ablation needle portion from being damaged, the handle portion comprises: the ablation needle bending-protecting member 35 is disposed between the outer wall of the ablation needle portion 2 and the inner wall of the handle portion 3, please refer to fig. 5. Preferably, the ablation needle bending protector 35 is located near the distal side of the handle portion 3.
In one embodiment, in order to facilitate the arrangement of the inner component at the proximal end of the ablation needle, the ablation needle with the adjustable needle head position further comprises: and the far end of the gradual change tube 24 is connected with the near end of the ablation needle part 2, and the far end of the gradual change tube 24 is the end of the gradual change tube 24 close to the needle head 11. The inner diameter of the transition tube 24 is larger than the inner diameter of the ablation needle portion 2, please refer to fig. 3 and 4.
The distal end of the gradual-change tube 24 can be sleeved on the proximal end of the ablation needle portion 2, please refer to fig. 3 and 4. In different embodiments, the distal end of the transition tube 24 and the proximal end of the ablation needle portion 2 can also be connected and fixed by welding. In various embodiments, the transition tube 24 and the needle shaft of the ablation needle portion 2 may be in the form of an integral structure.
In one embodiment, the air inlet pipe control 25 exits to the exterior of the transition pipe 24 through a seal assembly 28. The sealing assembly 28 is composed of a sealing extension tube 281, a sealing cap 282, a sealing ring 283 and a sealing ring retaining member 284. The seal assembly 28 acts as a dynamic seal against the escape of frozen gas as the inlet control 25 moves axially within the seal extension 281.
Wherein, one end of the air inlet extension pipe 26, the air return pipe 27 and the sealing extension pipe 281 is arranged inside the proximal end of the transition pipe 24, and the fixed sealing is preferably performed by welding.
In one embodiment, the needle rod and the vacuum wall inner tube are metal tubes, the tube wall of each metal tube can be very thin, the diameter of the ablation needle can be further reduced, and meanwhile, the flexibility, resilience, rigidity and toughness of the ablation needle part can be considered.
In one embodiment, the distal end of the needle shaft 21 may be processed to remove the cutting edge, such as: the rounded corners 211 prevent the distal end of the needle shaft 21 from scratching its working channel when used with an endoscope or scratching tissue through the natural orifice.
In one embodiment, the needle control member may be tubular and have other cables routed inside, such as: the temperature measuring line or the temperature restoring line can be filled with glue and sealed when the cable is led.
In one embodiment, the outer surface of the shaft 21 of the targeting zone 2' may be ultrasonically enhanced by means including, but not limited to, grooves, indentations, and the like.
The ablation needle of the above-described embodiments may be applied to a cryoablation device, and may also be applied to a thermal conduction-based ablation device. Cryoablation devices include, but are not limited to, devices based on the joule thomson principle (argon, nitrogen, nitrous oxide, carbon dioxide, etc. are gas sources), devices based on the gaseous or liquid coolant delivery principle (liquid nitrogen or liquid argon, etc.), and devices based on the thermal conduction ablation devices include, but are not limited to, devices based on the water, water vapor, or alcohol (steam) delivery principle.
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 (16)
1. An ablation needle with an adjustable needle head position, which is characterized by comprising: a needle head part and an ablation needle part; wherein,
the tip segment includes: a needle head, a needle head control part;
the far end of the needle head control part penetrates through the ablation needle part, the far end of the needle head control part is connected with the needle head, and the far end of the needle head control part is one end, close to the needle head, of the needle head control part;
the needle head control part is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part;
the needle is configured to be controlled to move towards the far end, so that the far end of the needle is extended out of the ablation needle part, and the near end of the needle is not pulled out of the ablation needle part;
from the far end to the near end of the ablation needle part, the inside of the ablation needle part is divided into a targeting area and a temperature insulation area;
a section of the ablation needle portion at the thermal insulation zone is configured to enable thermal insulation between an interior and an exterior thereof.
2. The adjustable needle tip position ablation needle of claim 1, wherein the needle tip control is further configured to control the distal movement of the needle tip such that the distal end of the needle tip protrudes out of the ablation needle portion.
3. The ablation needle with the adjustable needle head position according to claim 1, wherein the needle head control part comprises: the distal end of the spring is connected with the needle head, and the proximal end of the spring is fixed relative to the position of the ablation needle part;
during proximal movement of the needle, the spring is in a compressed state.
4. The adjustable needle tip location ablation needle of claim 1, further comprising: the needle head sealing part is arranged between the needle head and the ablation needle part and used for enabling the needle head and the ablation needle part to form dynamic sealing.
5. The adjustable needle tip location ablation needle of claim 4, wherein the needle tip seal comprises: radial seals, axial seals.
6. The needle position adjustable ablation needle of claim 1, wherein the needle control comprises: a needle control member, a needle control extension member; wherein,
the far end of the needle head control piece penetrates through the ablation needle part, the far end of the needle head control piece is connected with the needle head, and the far end of the needle head control piece is one end, close to the needle head, of the needle head control piece;
the far end of the needle head control extension piece is connected with the near end of the needle head control piece, and the far end of the needle head control extension piece is one end, close to the needle head, of the needle head control extension piece;
the needle control extension is thicker than the needle control.
7. The ablation needle with the adjustable needle head position according to claim 1, wherein the needle head control part comprises: an air inlet pipe;
the far end of the air inlet pipe penetrates through the ablation needle part, the far end of the air inlet pipe is connected with the needle head, and the far end of the air inlet pipe is one end, close to the needle head, of the air inlet pipe;
the intake pipe has: at least one radial gas outlet hole located within the targeting zone;
the needle head control part is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part, and the following steps are specifically carried out: the air inlet pipe is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part.
8. The needle-position-adjustable ablation needle according to claim 7, wherein the needle-head control section further comprises: the air inlet pipe control part is connected with the air inlet pipe;
the air inlet pipe is used for controlling the needle head to move towards the near end so as to retract into the ablation needle part, and the method specifically comprises the following steps: the air inlet pipe control part is used for controlling the air inlet pipe to drive the needle head to move towards the near end so as to retract into the ablation needle part.
9. The ablation needle with the adjustable needle head position according to claim 8, wherein one section of the air inlet pipe is of a spiral pipe structure;
the air inlet pipe control part is connected with the air inlet pipe and specifically comprises the following steps: the air inlet pipe control part is connected with the far end of the spiral pipe structure.
10. The adjustable needle tip location ablation needle of claim 8, further comprising: the far end of the air inlet extension pipe is connected with the near end of the air inlet pipe, and the far end of the air inlet extension pipe is one end, close to the needle, of the air inlet extension pipe;
the air inlet extension pipe is thicker than the air inlet pipe.
11. The needle position adjustable ablation needle according to any one of claims 1 to 10, further comprising: the proximal end of the ablation needle part penetrates through the handle part.
12. The adjustable needle tip location ablation needle of claim 11, wherein the handle portion comprises: the handle comprises a handle inner layer, a handle far-end outer layer and a handle near-end outer layer;
the far end of the handle inner layer penetrates through the handle far-end outer layer, the near end of the handle inner layer penetrates through the handle near-end outer layer, and the far end of the handle inner layer is one end, close to the needle, of the handle inner layer;
a preset distance is reserved between the near end of the outer layer at the far end of the handle and the far end of the outer layer at the near end of the handle;
the outer layer of the distal end of the handle is configured to be connected with the instrument to be matched so that the ablation needle part can be extended out of the handle part and inserted into the instrument to be matched;
the outer layer of the near end of the handle is connected with the needle head control part;
the outer layer at the far end of the handle and the inner layer of the handle can be controlled to move along the axis direction of the inner layer of the handle;
the outer layer at the near end of the handle and the inner layer of the handle can be controlled to move along the axis direction of the inner layer of the handle.
13. The adjustable needle tip location ablation needle of claim 12, wherein the handle portion further comprises: the far-end locking piece and the near-end locking piece are arranged on the front end of the shell;
the distal locking piece is used for locking the relative position between the outer layer at the distal end of the handle and the inner layer of the handle;
the proximal locking piece is used for locking the relative position between the handle proximal outer layer and the handle inner layer.
14. The adjustable needle tip location ablation needle of claim 11, wherein the handle portion comprises: the ablation needle bending protection piece is arranged between the outer wall of the ablation needle part and the inner wall of the handle part.
15. The adjustable needle tip location ablation needle of any one of claims 1 to 10, further comprising: the far end of the gradual change pipe is connected with the near end of the ablation needle part, and the far end of the gradual change pipe is one end of the gradual change pipe close to the needle head;
the inner diameter of the gradual change pipe is larger than that of the ablation needle part.
16. The ablation needle with adjustable needle tip position of any of claims 1 to 10, wherein the needle shaft and the vacuum wall inner tube are metal tubes.
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| CN202210793270.7A CN115192173B (en) | 2022-07-07 | 2022-07-07 | Ablation needle with adjustable needle position |
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| CN202210793270.7A CN115192173B (en) | 2022-07-07 | 2022-07-07 | Ablation needle with adjustable needle position |
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| CN115192173B CN115192173B (en) | 2024-06-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116898559A (en) * | 2023-09-12 | 2023-10-20 | 首都医科大学附属北京友谊医院 | ablation scalpel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6200313B1 (en) * | 1994-03-31 | 2001-03-13 | Fuji Photo Optical Co., Ltd. | Puncture instrument for punctured high frequency treatments |
| CN213552271U (en) * | 2020-10-16 | 2021-06-29 | 深圳友合然科技有限公司 | Joint, cryoablation needle and cryoablation treatment device |
| 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 |
| CN113842205A (en) * | 2021-11-11 | 2021-12-28 | 上海导向医疗系统有限公司 | Cryoablation needle with position-adjustable J-T groove |
| CN114129256A (en) * | 2021-11-10 | 2022-03-04 | 中国人民解放军空军军医大学 | Ablation method of radio frequency ablation electrode needle |
| CN114343823A (en) * | 2022-03-21 | 2022-04-15 | 上海导向医疗系统有限公司 | Cryoablation needle with adjustable target area |
-
2022
- 2022-07-07 CN CN202210793270.7A patent/CN115192173B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6200313B1 (en) * | 1994-03-31 | 2001-03-13 | Fuji Photo Optical Co., Ltd. | Puncture instrument for punctured high frequency treatments |
| CN213552271U (en) * | 2020-10-16 | 2021-06-29 | 深圳友合然科技有限公司 | Joint, cryoablation needle and cryoablation treatment device |
| 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 |
| CN114129256A (en) * | 2021-11-10 | 2022-03-04 | 中国人民解放军空军军医大学 | Ablation method of radio frequency ablation electrode needle |
| CN113842205A (en) * | 2021-11-11 | 2021-12-28 | 上海导向医疗系统有限公司 | Cryoablation needle with position-adjustable J-T groove |
| CN114343823A (en) * | 2022-03-21 | 2022-04-15 | 上海导向医疗系统有限公司 | Cryoablation needle with adjustable target area |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116898559A (en) * | 2023-09-12 | 2023-10-20 | 首都医科大学附属北京友谊医院 | ablation scalpel |
| CN116898559B (en) * | 2023-09-12 | 2023-12-19 | 首都医科大学附属北京友谊医院 | ablation scalpel |
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| CN115192173B (en) | 2024-06-28 |
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