CN113813042B - Electrode needle and electrode device - Google Patents
Electrode needle and electrode device Download PDFInfo
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- CN113813042B CN113813042B CN202111235710.9A CN202111235710A CN113813042B CN 113813042 B CN113813042 B CN 113813042B CN 202111235710 A CN202111235710 A CN 202111235710A CN 113813042 B CN113813042 B CN 113813042B
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- 238000007789 sealing Methods 0.000 claims abstract description 113
- 239000012530 fluid Substances 0.000 claims abstract description 94
- 239000007788 liquid Substances 0.000 claims description 79
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 9
- 210000001519 tissue Anatomy 0.000 description 14
- 238000002679 ablation Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 7
- 210000003205 muscle Anatomy 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 6
- 206010028980 Neoplasm Diseases 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000006907 apoptotic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004118 muscle contraction Effects 0.000 description 2
- 230000001575 pathological effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004520 electroporation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000028993 immune response Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000001539 phagocyte Anatomy 0.000 description 1
Classifications
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1402—Probes for open surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
-
- 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
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00613—Irreversible electroporation
-
- 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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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Otolaryngology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The embodiment of the application provides an electrode needle and an electrode device. The electrode needle includes: the device comprises a shell, a needle core and a needle tube; at least part of the needle core is arranged in the shell, a sealing structure is formed at the first end of the needle core in the shell, and the sealing structure is in sliding connection with the inner wall of the shell; the housing includes a first fluid interface and a second fluid interface; the first fluid interface and the second fluid interface are respectively positioned at two sides of the movement range of the sealing structure along the axial direction of the needle core and are used for adjusting the fluid pressure difference along the axial direction of the two sides of the sealing structure through inputting or outputting fluid, and the second end of the needle core is driven to move relative to the shell and the needle tube along the axial direction by driving the sealing structure. According to the embodiment of the application, the driving of the needle core along the axial direction and the accurate control of the moving position are realized by adjusting the fluid pressure difference at two sides of the sealing structure, so that the adjustable control of the discharge size of the electrode needle is realized.
Description
Technical Field
The application relates to the technical field of ablation electrodes, in particular to an electrode needle and an electrode device.
Background
The irreversible electroporation technology is to insert an electrode needle into a human body, form a plurality of nanoscale irreversible pore channels on the surface of a cell membrane by releasing high-voltage electric pulse, destroy the stable state of cells, promote the rapid apoptosis of the cells, and the cell fragments after the apoptosis are phagocytized by phagocytes in the human body, and simultaneously generate immune response.
At present, the control difficulty of the actual size (and the actual discharge size) of the electrode needle inserted into a human body is high, when the actual discharge size of the electrode needle is too large, the occurrence of muscle contraction caused by current flowing through muscle tissues can be caused, the pain of a patient can be increased, the electrode needle is easily caused to shift, and the control difficulty of an ablation area is increased.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides an electrode needle and an electrode device, which are used for solving the technical problem of high difficulty in controlling the discharge size of the electrode needle in the prior art.
In a first aspect, an embodiment of the present application provides an electrode needle, including: the device comprises a shell, a needle core and a needle tube; at least part of the needle core is arranged in the shell, a sealing structure is formed at the first end of the needle core in the shell, and the sealing structure is in sliding connection with the inner wall of the shell; the housing includes a first fluid interface and a second fluid interface; the first fluid interface and the second fluid interface are respectively positioned at two sides of the movement range of the sealing structure along the axial direction of the needle core, and are used for adjusting the fluid pressure difference of two sides of the sealing structure along the axial direction through inputting or outputting fluid, and driving the sealing structure to drive the second end of the needle core to move along the axial direction relative to the shell and the needle tube.
Optionally, along the axial direction of the needle core, a first wall, a first limiting piece, a second limiting piece and a second wall are sequentially and at intervals arranged in the shell; the first limiting piece and the second limiting piece comprise through holes; the housing between the first wall and the first stop forms a first cavity, the first cavity being in communication with the first fluid interface; the shell between the first limiting piece and the second limiting piece forms a second cavity, and the sealing structure is positioned in the second cavity; the through hole of the first limiting piece or the second limiting piece is matched with the needle core; the housing between the second stop and the second wall forms a third cavity, the third cavity in communication with the second fluid interface.
Optionally, the first fluid interface includes a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet respectively communicating with the first cavity; the second fluid interface includes a second liquid inlet and a second liquid outlet, the second liquid inlet and the second liquid outlet being in communication with the third chamber, respectively.
Optionally, the first fluid interface includes a first gas inlet and outlet, and the first gas inlet and outlet is communicated with the first cavity and is used for adjusting the gas flow rate at one side of the sealing structure away from the third cavity; the second fluid interface comprises a second gas inlet and outlet, and the second gas inlet and outlet is communicated with the third cavity and used for adjusting the gas flow rate of one side, far away from the first cavity, of the sealing structure.
Optionally, the electrode needle further comprises: a seal ring; the sealing ring and the needle core are coaxially arranged and sleeved outside the sealing structure, and are used for forming sealing between the sealing structure and the inner wall of the shell.
Optionally, a third wall is further arranged in the shell, and the third wall is located at one side of the first wall away from the first limiting piece; the electrode needle also comprises a separation ring, wherein the separation ring is arranged between the third wall and the first wall, the separation ring is used for being sleeved outside the needle core, and the inner ring surface of the separation ring is used for being in sliding contact with the surface of the needle core so as to strip dust on the surface of the needle core and collect the dust at the separation ring.
Optionally, the electrode needle comprises at least one of: one end of the needle tube is connected with the shell, and the other end of the needle tube is provided with a tip; the inner cavity of the needle tube is communicated with the inner cavity of the shell to form a moving space of the second end of the needle core; the needle tube is an insulated needle tube.
Optionally, the electrode needle comprises at least one of: the first end of the needle core protrudes radially to form a cylindrical sealing structure; the sealing structure and the needle core are integrally formed.
Optionally, the electrode needle further comprises at least one of: a first connector, one end of which is connected with the first fluid interface, and the other end of which is used for being connected with a fluid regulating device; and one end of the second joint is connected with the second fluid interface, and the other end of the second joint is used for being connected with the fluid regulating device.
In a second aspect, an embodiment of the present application provides an electrode device comprising an electrode needle according to any one of the first embodiments of the present application, a pulse generating device electrically connected to the electrode needle, and a fluid regulating device connected to the electrode needle.
The technical scheme provided by the embodiment of the application has the beneficial technical effects that:
firstly, through the fluid pressure difference of the two opposite sides of the sealing structure arranged at the first end of the needle core, power for driving the sealing structure to move is provided to control the needle core to move, and then the distance between the second end of the needle core and the needle tube far away from one end of the shell is controlled, namely the discharge size is adjustable, so that different operation ranges are adjusted, and the applicable scene of the electrode needle is widened. Secondly, through the control to the size that discharges, adjust the position that removes the needle core second end for the needle tubing promptly, can prevent that the size that discharges from too big human muscle that causes from contracting, and then avoid or weaken the electrode needle that causes because of muscle contraction and remove to realize the control of ablation area, improve and ablate efficiency and ablation effect. In addition, the second end of the needle core moves in the needle tube for multiple times to adjust the discharge sizes of different sizes, so that multiple damages caused by repeated insertion and extraction of a human body to adjust the discharge sizes are avoided.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural view of an electrode needle according to an embodiment of the present application;
fig. 2 is a schematic top view of an electrode needle according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of an electrode needle according to an embodiment of the present application;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic view of another electrode needle according to an embodiment of the present application;
FIG. 6 is a schematic top view of another electrode needle according to an embodiment of the present application;
FIG. 7 is a schematic cross-sectional view of another electrode needle according to an embodiment of the present application;
fig. 8 is a partial enlarged view at B in fig. 7.
Reference numerals and description:
1-a housing; 11-a first housing body; 12-a second housing body; 13-a first wall; 14-a first limiting piece; 15-a second limiting piece; 16-a second wall; 17-a third wall;
2-a needle core; 21-a sealing structure;
3-needle tube;
4-a first fluid interface; 41-a first liquid inlet; 42-a first liquid outlet;
5-a second fluid interface; 51-a second liquid inlet; 52-a second liquid outlet;
6-sealing ring;
7-a first linker; 71-a first sub-linker; 72-a second sub-linker;
8-a second linker; 81-third sub-linker; 82-fourth sub-linker;
9-isolating rings;
10-connecting wires.
Detailed Description
The present application is described in detail below, examples of embodiments of the application are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. Further, if detailed description of the known technology is not necessary for the illustrated features of the present application, it will be omitted. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments.
The embodiment of the application provides an electrode needle, the structural schematic diagram of which is shown as 1-8, and the structure of the electrode needle mainly comprises a shell 1, a needle core 2 and a needle tube 3.
At least part of the needle core 2 is arranged in the shell 1, a sealing structure 21 is formed at the first end of the needle core 2 in the shell 1, and the sealing structure 21 is in sliding connection with the inner wall of the shell 1.
The housing 1 comprises a first fluid interface 4 and a second fluid interface 5. The first fluid interface 4 and the second fluid interface 5 are respectively located at two sides of the moving range of the sealing structure 21 along the axial direction of the needle core 2, and are used for adjusting the fluid pressure difference along the axial direction of the two sides of the sealing structure 21 by inputting or outputting fluid, and driving the sealing structure 21 to drive the second end of the needle core 2 to move along the axial direction relative to the housing 1 and the needle tube 3.
In a possible embodiment, as shown in fig. 3 and 7, the body of the housing 1 is cylindrical, one end of the needle tube 3 is connected to one end of the housing 1, and is communicated with the inner cavity of the housing 1, and the needle tube 3 is coaxially disposed with the housing 1. The first end of the needle core 2 extends into the housing 1, and the second end of the needle core 2 extends into the needle tube 3. The outer surface of the sealing structure 21 arranged at the first end of the needle core 2 is in sliding connection with the inner wall of the housing 1. The first fluid interface 4 and the second fluid interface 5 are respectively arranged on the side face of the shell 1 and are respectively arranged at positions close to the end parts of the shell 1, and the first fluid interface 4 and the second fluid interface 5 are communicated with the inner cavity of the shell 1. The fluid introduced through the first fluid interface 4 forms fluid pressure on one side of the sealing structure 21, the fluid introduced through the second fluid interface 5 forms fluid pressure on the other side of the sealing structure 21, and the fluid pressure difference formed on two opposite sides of the sealing structure 21 is used for generating a force for pushing the sealing structure 21 to move, so that the sealing structure 21 moves in the inner cavity of the housing 1, and the second end of the needle core 2 is driven to move in the needle tube 3 in the axial direction.
In the embodiment of the application, firstly, the power for driving the sealing structure 21 to move is provided by the fluid pressure difference at two opposite sides of the sealing structure 21 arranged at the first end of the needle core 2 so as to control the movement of the needle core 2, and then the distance between the second end of the needle core 2 and one end of the needle tube 3 far away from the shell 1 is controlled, namely, the discharge size is adjustable, so that different operation ranges can be adjusted, and the applicable scene of the electrode needle is widened. Secondly, through the control to the size that discharges, adjust the position that removes the second end of needle core 2 for the needle tubing promptly, can prevent the too big human muscle shrink that causes of size that discharges, and then avoid or weaken the electrode needle removal that causes because of muscle shrink to realize the control of ablation region, improve ablation efficiency and ablation effect. In addition, through the second end of the needle core 2 moving in the needle tube 3 for a plurality of times to adjust the discharge sizes of different sizes, the repeated insertion and extraction of the human body to adjust the discharge sizes to cause a plurality of damages is avoided.
Alternatively, as shown in fig. 1-3 and 5-7, the housing 1 comprises a first housing body 11 and a second housing body 12 that are detachably connected, at least part of the first fluid interface 4 may be provided on the first housing body 11, and at least part of the second housing body 12 may be provided on the second housing body 12. By arranging the first housing body 11 and the second housing body 12 in a detachable connection, the replacement of the needle core 2 by an operator is facilitated.
Alternatively, the needle cannula 3 may be detachably connected to the housing 1, for example, the needle cannula 3 may be screwed to the housing 1, and the needle cannula 3 may be easily replaced by an operator by providing the needle cannula 3 in detachable connection with the housing 1.
Alternatively, as shown in fig. 1-3 and 5-7, the end of the housing 1 remote from the needle cannula 3 is provided with a connecting wire 10, one end of the connecting wire 10 being adapted to be connected to the needle core 2 and the other end being adapted to be connected to a pulse generating means for releasing an electrical pulse at the second end of the needle core 2.
Optionally, as shown in fig. 3, 4, 7 and 8, along the axial direction of the needle core 2, a first wall 13, a first limiting member 14, a second limiting member 15 and a second wall 16 are sequentially and at intervals arranged in the housing 1; the first limiting piece 14 and the second limiting piece 15 comprise through holes; the housing 1 between the first wall 13 and the first stop 14 forms a first cavity which communicates with the first fluid interface 4; the housing 1 between the first and second limiting members 14, 15 forms a second cavity in which the sealing structure 21 is located; the through hole of the first limiting piece 14 or the second limiting piece 15 is matched with the needle core 2; the housing 1 between the second stop 15 and the second wall 16 forms a third chamber which communicates with the second fluid port 5.
Alternatively, the first limiting member 14 and the second limiting member 15 may be limiting plates, limiting walls, or limiting protrusions protruding from the inner wall of the housing 1.
On the basis of the above embodiment, an alternative embodiment is provided in which the first stopper 14 and the second stopper 15 are both stopper plates. The first wall 13, the first stopper 14, the second stopper 15 and the second wall 16 may be disposed perpendicularly to the axial direction of the housing 1. The through holes arranged on the first limiting piece 14 and the second limiting piece 15 comprise first through holes, the axial direction of the first through holes is axially arranged along the shell 1, and the first through holes are used for allowing the needle core 2 to pass through so as to limit the moving direction of the needle core 2. The through holes further comprise second through holes, the second through holes can be uniformly arranged on the first limiting piece 14 and the second limiting piece 15, the second through holes of the first limiting piece 14 are used for communicating the first cavity with the second cavity, and the first cavity and the second cavity are used for mutually communicating fluid; the second through hole of the second limiting member 15 is used for communicating the second cavity with the third cavity, and is used for communicating the fluid in the second cavity and the fluid in the third cavity with each other. The second cavity comprises a first subchamber and a second subchamber, the first subchamber is a space between the first limiting junction piece and the sealing structure 21, and the first subchamber is communicated with the first cavity; the second subchamber is the space between the second limiting piece 15 and the sealing structure 21, and the second subchamber is communicated with the third chamber. The first subchamber is not in communication with the second subchamber.
The first limiting member 14 and the second limiting member 15 are used for limiting the sealing structure 21 to the second cavity, so that the moving range of the sealing structure 21 is between the first limiting member 14 and the second limiting member 15, and the fluid pressure difference is determined by adjusting the fluid pressures at two opposite sides of the sealing structure 21, so that the sealing structure 21 moves. Along the axial direction, the arrangement can prevent the sealing structure 21 from moving between the end part of the shell 1 and the fluid interface, so that fluid pressure cannot be formed on one side, close to the end part, of the sealing structure 21, the capacity of bilateral regulation of fluid pressure difference is avoided being lost, and the flexibility of regulation is reduced.
Optionally, as shown in fig. 4, the electrode needle further comprises a sealing ring 6, and the sealing ring 6 is coaxially arranged with the needle core 2 and sleeved outside the sealing structure 21, so as to form a seal between the sealing structure 21 and the inner wall of the housing 1.
In a possible embodiment, a groove is provided along the surface of the sealing structure 21, and the sealing ring 6 is filled in the groove and protrudes out of the surface of the sealing structure 21 to achieve tight connection with the inner wall of the housing 1, and to increase tightness so as to ensure that the sealing structure 21 is not communicated on two opposite sides.
Optionally, as shown in fig. 3, 4, 7 and 8, a third wall 17 is further disposed in the housing 1, and the third wall 17 is located on a side of the first wall 13 away from the first limiting member 14; the electrode needle further comprises a spacer ring 9, wherein the spacer ring 9 is arranged between the third wall 17 and the first wall 13, the spacer ring 9 is used for sleeving the outside of the needle core 2, and the inner ring surface of the spacer ring 9 is used for being in sliding contact with the surface of the needle core 2 so as to strip dust on the surface of the needle core 2 and collect the dust at the position of the spacer ring 9.
On the basis of the above embodiment, an alternative embodiment is provided in which the third wall 17 is an inner wall of the housing 1 arranged away from the first wall 13, the third wall 17 being arranged close to the needle cannula 3. The isolating ring 9 is sleeved outside the needle core 2, and the isolating ring 9 can be attached to the third wall 17, can be attached to the first wall 13, and can be arranged at the interval between the third wall 17 and the first wall 13. The spacer ring 9 may be provided in plurality. The inner ring surface of the isolation ring 9 is tightly contacted with the outer surface of the needle core 2, and in the process of moving the needle core 2, the inner ring surface of the isolation ring 9 peels off dust attached to the outer surface of the needle core 2, so that the external dust is prevented from entering the inner cavity of the shell 1 including the first cavity, and the cleanliness of the needle core 2 is ensured.
In order to further ensure the cleanliness of the needle core 2, the length of the needle core 2 is longer than that of the shell 1, so that the needle core 2 is prevented from moving into the shell 1 completely, the needle core 2 is separated from the isolating ring 9, and external dust is prevented from entering the inner cavity of the shell 1 through the needle tube 3 and a pore canal for the needle core 2 to pass through, so that the needle core 2 is prevented from being polluted.
Optionally, the electrode needle comprises at least one of: one end of the needle tube 3 is connected with the shell 1, and the other end of the needle tube 3 is provided with a tip; the inner cavity of the needle tube 3 is communicated with the inner cavity of the shell 1 to form a moving space of the second end of the needle core 2; the needle tube 3 is an insulated needle tube 3.
On the basis of the above embodiment, an alternative embodiment is provided, the tip portion of the needle tube 3, which is arranged at the end far away from the housing 1, is used for piercing human tissue, the needle tube 3 is inserted into tumor tissue of the human body, and after moving to a proper position, the second end of the needle core 2 is controlled to move, the length of the inserted human body is adjusted, the outer surface of the needle core 2 is plated with an insulating layer, the distance from the second end of the needle core 2 to the end of the needle tube 3 far away from the housing 1 is determined, namely, the discharge size of the electrode needle is determined, so that the ablation action range of the electrode needle is determined, and the flexible adjustment of the position depth of discharge is realized.
Optionally, the wall of the needle tube 3 is provided with a structure for exposing the needle core 2, and the structure can be a hollowed-out structure, a groove structure or an opening structure.
The needle cannula 3 is made of an insulating material or is manufactured by an insulating process, for example by coating the outer side of the needle cannula 3 with an insulating coating. The needle tube 3 serves to prevent the needle core 2 from contacting non-diseased tissue surrounding the diseased tissue when the needle core 2 contacts the diseased tissue, so that biological tissue other than the diseased tissue is not damaged. Namely, through the arrangement of the needle tube 3, only the pathological cells in direct contact with the needle core 2 can be subjected to apoptosis, and the phenomenon that cells at other positions are subjected to apoptosis due to the contact with the needle core 2 is prevented, so that the safety of the electrode needle is improved, and the electrode needle can be applicable to pathological tissues with different depths and/or sizes, so that the application scene of the electrode needle is widened.
Optionally, as shown in fig. 3 and 7, the electrode needle includes at least one of: the first end of the needle core 2 is radially protruded to form a cylindrical sealing structure 21; the sealing structure 21 is integrally formed with the needle core 2.
On the basis of the above embodiment, an alternative embodiment is provided, the main body of the sealing structure 21 is cylindrical, the side wall of the sealing structure 21 is slidably connected with the inner wall of the casing 1, and the sealing structure 21 is driven to move by adjusting the fluid pressure difference at two sides of the sealing structure 21, so as to form a driving structure similar to a piston, thereby ensuring that the needle core 2 can move, and further ensuring that the discharge size is adjustable.
Optionally, as shown in fig. 1-8, the electrode needle further comprises at least one of: one end of the first joint 7 is connected with the first fluid interface 4, and the other end is used for being connected with a fluid regulating device; the second connector 8 is connected at one end to the second fluid interface 5 and at the other end to the fluid regulating device.
On the basis of the above embodiments, an alternative embodiment is provided, the electrode needle further comprising a first connector 7 and a second connector 8 for connecting means, such as fluid regulating means, for cooperation with the electrode needle. The first and second joints 7 and 8 may be self-sealing quick-pass joints of the type KCH06-01S, and the first and second joints 7 and 8 may include a joint body and a cover portion connected to the joint body.
Optionally, the first fluid interface 4 and the second fluid interface 5 comprise a hole wall with a hole wall protruding from the surface of the housing 1, threads are arranged on the inner side of the hole wall, and the first connector 7 and the second connector 8 are detachably connected with the first fluid interface 4 and the second fluid interface 5 respectively through the threads.
Alternatively, as shown in fig. 1-4, the first fluid interface 4 comprises a first liquid inlet 41 and a first liquid outlet 42, the first liquid inlet 41 and the first liquid outlet 42 being in communication with the first chamber, respectively; the second fluid interface 5 comprises a second liquid inlet 51 and a second liquid outlet 52, the second liquid inlet 51 and the second liquid outlet 52 being in communication with the third chamber, respectively.
In a possible embodiment, a liquid inlet and outlet is provided for the electrode needle driven with a liquid fluid. The first liquid inlet 41 and the first liquid outlet 42 may be disposed opposite to each other, the axial directions of the first liquid inlet 41 and the first liquid outlet 42 may be on the same straight line, and the first connector 7 includes a first sub-connector 71 and a second sub-connector 72, where one end of the first sub-connector 71 is connected to the first liquid inlet 41, and the other end is connected to the liquid adjusting device, so as to introduce liquid into the housing; the second sub-fitting 72 is connected at one end to the second liquid inlet 42 for receiving liquid from the housing. The liquid pressure on the side of the sealing structure 21 is regulated and determined by the cooperation of the incoming liquid and the outgoing liquid. For example, opening the first liquid inlet 41, closing the first liquid outlet 42 increases the liquid pressure on the side of the sealing structure 21; alternatively, the first liquid inlet 41 is closed and the first liquid outlet 42 is opened to reduce the liquid pressure on the side of the sealing structure 21.
The second liquid inlet 51 and the second liquid outlet 52 can be oppositely arranged, the axial directions of the second liquid inlet 51 and the second liquid outlet 52 can be on the same straight line, and correspondingly, the second connector 8 comprises a third sub-connector 81 and a fourth sub-connector 82, one end of the fourth sub-connector 82 is connected with the second liquid inlet 51, and the other end is connected with a liquid regulating device for introducing liquid into the shell; the third sub-connector 81 is connected at one end to the second liquid outlet 52 for receiving liquid flowing out of the housing. By the cooperation of the incoming liquid and the outgoing liquid, the liquid pressure on the other side of the sealing structure 21 is regulated and determined. By controlling the fluid pressure modes at the two sides of the sealing structure 21 in a double-side control manner, the liquid pressure difference at the two sides of the sealing structure 21 can be determined more quickly and accurately, and the moving direction and distance of the driving sealing structure 21 are determined so as to adjust the position of the second end of the needle core 2, and finally, the discharge size of the electrode needle is adjusted.
The operation process of the hydraulic electrode needle comprises the following steps: the tip of the needle cannula 3 (the end remote from the housing 1) is used to pierce the tissue of the human body and move to a proper position within the tumor tissue of the human body, keeping the needle cannula 3 from moving. The second end of the needle core 2 is moved to the position farthest from the tip of the needle tube 3 in advance, namely, the position with the largest discharge size is opened, the fourth sub-connector 82 is opened, liquid is introduced into the third cavity by utilizing the second liquid inlet 51, meanwhile, the third sub-connector 81 connected with the second liquid outlet 52 is closed, so that liquid pressure is formed on one side of the sealing structure 21 and is higher than that on the other side of the sealing structure 21, the sealing structure 21 is pushed to move towards the first cavity by pressure acting on one end face of the sealing structure 21, the second end of the needle core 2 is driven to move close to the tip of the needle tube 3, the discharge size is reduced, the designed discharge size is adjusted, an external pulse generating device is connected through the connecting lead 10, and high-voltage electric pulses are released at the second end of the needle core 2, so that tumor tissues are ablated. When the discharge size needs to be increased, the first sub-connector 71 is opened, liquid is introduced into the first cavity by using the first liquid inlet 41, the second sub-connector 72 connected with the first liquid inlet 42 is closed, so that the liquid is introduced into the first cavity, and the liquid pressure at the other side of the sealing structure 21 is increased; simultaneously, the fourth sub-connector 82 connected with the second liquid inlet 51 is opened, so that the fluid on one side of the sealing structure 21 flows out, the liquid pressure on one side of the sealing structure 21 is reduced, the liquid pressure on the other side of the sealing structure 21 is higher than the liquid pressure on one side of the sealing structure 21, the generated fluid pressure difference pushes the sealing structure 21 to move towards the direction of the third cavity, and the second end of the needle core 2 is driven to move away from the tip of the needle tube 3, so that the discharge size is adjusted.
Alternatively, as shown in fig. 5-8, the first fluid port 4 includes a first gas inlet and outlet, which communicates with the first chamber for regulating the flow of gas from the side of the sealing structure 21 remote from the third chamber; the second fluid port 5 comprises a second gas inlet and outlet, which communicates with the third chamber for regulating the gas flow from the side of the sealing structure 21 remote from the first chamber.
In a possible embodiment, a gas inlet and outlet is provided for the electrode needle driven with a gaseous fluid. The first connector 7 is connected with a first gas inlet and outlet, and the first gas inlet and outlet regulates and determines the gas pressure at one side of the sealing structure 21 by introducing or discharging gas; the second joint 8 is connected to a second gas inlet and outlet, which regulates and determines the gas pressure on the other side of the sealing structure 21 by the inlet or outlet of gas. Through controlling the two sides of the gas pressure at two sides of the sealing structure 21 respectively, the liquid pressure difference at two sides of the sealing structure 21 can be determined more rapidly and more accurately by controlling the fluid pressure at two sides of the sealing structure 21 by controlling the two sides, and the moving direction and distance of the driving sealing structure 21 are determined so as to adjust the position of the second end of the needle core 2, and finally, the discharge size of the electrode needle is adjusted.
The operation process of the pneumatic electrode needle comprises the following steps: the tip of the needle cannula 3 (the end remote from the housing 1) is used to pierce the tissue of the human body and move to a proper position within the tumor tissue of the human body, keeping the needle cannula 3 from moving. The second end of the needle core 2 is moved to the position farthest from the tip of the needle tube 3 in advance, namely, the position with the largest discharge size is opened, the second connector 8 is opened, gas is introduced into the third cavity by utilizing the second gas inlet and outlet, so that gas pressure is formed on one side of the sealing structure 21 and is higher than the other side of the sealing structure 21, the sealing structure 21 is pushed to move towards the first cavity by the pressure acting on one end face of the sealing structure 21, the second end of the needle core 2 is driven to move close to the tip of the needle tube 3, the discharge size is reduced, the designed discharge size is adjusted, an external pulse generating device is connected through the connecting lead 10, and high-voltage electric pulses are released at the second end of the needle core 2, so that tumor tissues are ablated. When the discharge size needs to be increased, the first connector 7 is opened, and gas is introduced into the first cavity through the first gas inlet and outlet, so that the gas is introduced into the first cavity, and the gas pressure at the other side of the sealing structure 21 is increased; simultaneously, open and the second joint 8, make the gas outflow of one side of seal structure 21, reduce the one side gas pressure of seal structure 21 for the gas pressure of the opposite side of seal structure 21 is big than the one side gas pressure of seal structure 21, and the gas pressure difference that produces promotes seal structure 21 to remove to the direction of third chamber, and then drives the second end of needle core 2 to keep away from the tip of needle tubing 3 and remove, in order to adjust the discharge size.
In one possible embodiment, for another electrode needle driven by a gaseous fluid, the housing 1 includes a first wall 13, a first stopper 14 and a second wall 16, a first cavity is formed between the first wall 13 and the first stopper 14, and a fourth cavity is formed between the first stopper 14 and the second wall 16. The sealing structure 21 provided at the first end of the needle core 2 is located in the fourth cavity, and the second end of the needle core 2 extends into the needle tube 3. The second wall 16 and the sealing structure 21 have fixed gas pressure, the gas passes through or flows out from the first gas inlet and outlet to determine the gas pressure between the first wall 13 and the sealing structure 21, the gas pressure difference at two opposite sides of the sealing structure 21 is regulated in a single-side regulation mode, the sealing structure 21 is driven to move, the position of the second end of the needle core 2 is regulated, and finally the discharge size of the electrode needle is regulated. The operation of the electrode needle in this embodiment is similar to that of the previous embodiment, and thus will not be described again.
Based on the same inventive concept, an embodiment of the present application provides an electrode device comprising the electrode needle of any one of the previous embodiments of the present application, a pulse generating device electrically connected to the electrode needle, and a fluid regulating device connected to the electrode needle.
The electrode needle in this embodiment is the electrode needle in the foregoing embodiment, and the structure and the usage method thereof are not described in detail.
By applying the embodiment of the application, at least the following beneficial effects can be realized:
firstly, through the fluid pressure difference between two opposite sides of the sealing structure 21 arranged at the first end of the needle core 2, power for driving the sealing structure 21 to move is provided to control the needle core 2 to move, so as to control the distance between the second end of the needle core 2 and one end of the needle tube 3 far away from the shell 1, namely, the adjustable discharge size, so as to adjust different operation ranges, thereby widening the applicable scene of the electrode needle. Secondly, through the control to the size that discharges, adjust the position that removes the second end of needle core 2 for the needle tubing promptly, can prevent the too big human muscle shrink that causes of size that discharges, and then avoid or weaken the electrode needle removal that causes because of muscle shrink to realize the control of ablation region, improve ablation efficiency and ablation effect. In addition, through the second end of the needle core 2 moving in the needle tube 3 for a plurality of times to adjust the discharge sizes of different sizes, the repeated insertion and extraction of the human body to adjust the discharge sizes to cause a plurality of damages is avoided.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
The foregoing is only a partial embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present application, and such modifications and adaptations are intended to be comprehended within the scope of the present application.
Claims (9)
1. An electrode needle, comprising: the device comprises a shell, a needle core and a needle tube;
at least part of the needle core is arranged in the shell, a sealing structure is formed at the first end of the needle core in the shell, and the sealing structure is in sliding connection with the inner wall of the shell;
the housing includes a first fluid interface and a second fluid interface;
the first fluid interface and the second fluid interface are respectively positioned at two sides of the movement range of the sealing structure along the axial direction of the needle core and are used for adjusting the fluid pressure difference of the two sides of the sealing structure along the axial direction through inputting or outputting fluid, and driving the sealing structure to drive the second end of the needle core to move along the axial direction relative to the shell and the needle tube; the first fluid interface includes a first liquid inlet and a first liquid outlet; the second fluid interface includes a second liquid inlet and a second liquid outlet; the axial directions of the first liquid inlet and the first liquid outlet are on the same straight line, and the axial directions of the second liquid inlet and the second liquid outlet are on the same straight line;
a first wall, a first limiting piece, a second limiting piece and a second wall are sequentially and at intervals arranged in the shell along the axial direction of the needle core; the shell between the first wall and the first limiting piece forms a first cavity, and the first liquid inlet and the first liquid outlet are respectively communicated with the first cavity; the shell between the second limiting piece and the second wall forms a third cavity, and the second liquid inlet and the second liquid outlet are respectively communicated with the third cavity;
the shell between the first limiting piece and the second limiting piece forms a second cavity, the second cavity comprises a first subchamber and a second subchamber, the first subchamber is a space between the first limiting piece and the sealing structure, and the first subchamber is communicated with the first cavity; the second subchamber is a space between the second limiting piece and the sealing structure, the second subchamber is communicated with the third chamber, and the first subchamber is not communicated with the second subchamber.
2. The electrode needle of claim 1, wherein the electrode needle is configured to,
the first limiting piece and the second limiting piece comprise through holes;
the through hole of the first limiting piece or the second limiting piece is matched with the needle core.
3. The electrode needle of claim 1, wherein the electrode needle is configured to,
the first fluid interface comprises a first gas inlet and outlet, and the first gas inlet and outlet is communicated with the first cavity and is used for adjusting the gas flow rate at one side of the sealing structure away from the third cavity;
the second fluid interface comprises a second gas inlet and outlet, and the second gas inlet and outlet is communicated with the third cavity and used for adjusting the gas flow rate of one side, far away from the first cavity, of the sealing structure.
4. The electrode needle of claim 1, further comprising: a seal ring;
the sealing ring and the needle core are coaxially arranged and sleeved outside the sealing structure, and are used for forming sealing between the sealing structure and the inner wall of the shell.
5. The electrode needle of claim 1, wherein the electrode needle is configured to,
a third wall is arranged in the shell and is positioned at one side of the first wall away from the first limiting piece;
the electrode needle also comprises a separation ring, wherein the separation ring is arranged between the third wall and the first wall, the separation ring is used for being sleeved outside the needle core, and the inner ring surface of the separation ring is used for being in sliding contact with the surface of the needle core so as to strip dust on the surface of the needle core and collect the dust at the separation ring.
6. The electrode needle of claim 1, comprising at least one of:
one end of the needle tube is connected with the shell, and the other end of the needle tube is provided with a tip; the inner cavity of the needle tube is communicated with the inner cavity of the shell to form a moving space of the second end of the needle core;
the needle tube is an insulated needle tube.
7. The electrode needle of claim 1, comprising at least one of:
the first end of the needle core protrudes radially to form a cylindrical sealing structure;
the sealing structure and the needle core are integrally formed.
8. The electrode needle of claim 1, further comprising at least one of:
a first connector, one end of which is connected with the first fluid interface, and the other end of which is used for being connected with a fluid regulating device;
and one end of the second joint is connected with the second fluid interface, and the other end of the second joint is used for being connected with the fluid regulating device.
9. An electrode device comprising an electrode needle as claimed in any one of claims 1 to 8, a pulse generating means electrically connected to the electrode needle, and a fluid regulating means connected to the electrode needle.
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| CN202111235710.9A CN113813042B (en) | 2021-10-22 | 2021-10-22 | Electrode needle and electrode device |
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| CN202111235710.9A CN113813042B (en) | 2021-10-22 | 2021-10-22 | Electrode needle and electrode device |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995001751A1 (en) * | 1993-07-01 | 1995-01-19 | Boston Scientific Corporation | Imaging, electrical potential sensing, and ablation catheters |
| KR20010010873A (en) * | 1999-07-23 | 2001-02-15 | 구자홍 | Axial sealing structure for turbo compressor |
| CN103016736A (en) * | 2012-12-20 | 2013-04-03 | 四川日机密封件股份有限公司 | Hydraulic/air pressure controlled mechanical seal device |
| CN203138676U (en) * | 2013-04-12 | 2013-08-21 | 刘元东 | Bipolar coagulation forceps capable of dropping water automatically |
| CN106286954A (en) * | 2016-09-29 | 2017-01-04 | 黄建斌 | Pipeline self body regulation valve and execution device |
| CN108119661A (en) * | 2016-11-29 | 2018-06-05 | 长城汽车股份有限公司 | Fluid switching valve and radiator and vehicle |
| WO2018129466A1 (en) * | 2017-01-06 | 2018-07-12 | Nxthera, Inc. | Transperineal vapor ablation systems and methods |
| CN110236669A (en) * | 2019-05-28 | 2019-09-17 | 安瑞医疗器械(杭州)有限公司 | A kind of linkage structure of endoscopic instrument |
| WO2019206042A1 (en) * | 2018-04-23 | 2019-10-31 | 南京微创医学科技股份有限公司 | Multifunctional high-frequency electric knife |
| EP3574858A1 (en) * | 2018-05-09 | 2019-12-04 | Zhejiang Pengtian Medical Instrument Co., Ltd. | Cutting knife with adjustable needle and using method thereof |
| CN210228276U (en) * | 2018-02-06 | 2020-04-03 | 马晓琳 | Auxiliary needle for lumbar puncture |
| CN112353471A (en) * | 2020-11-11 | 2021-02-12 | 刘建平 | Fetal head suction midwifery device for obstetrics and gynecology department |
| WO2021027397A1 (en) * | 2019-08-13 | 2021-02-18 | 上海导向医疗系统有限公司 | Adjustable cryoablation needle |
| CN113476138A (en) * | 2021-08-24 | 2021-10-08 | 杭州维纳安可医疗科技有限责任公司 | Ablation device and pulse ablation system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11337745B2 (en) * | 2018-05-29 | 2022-05-24 | Ilooda Co., Ltd. | Device for treatment of acne and control method of the same |
-
2021
- 2021-10-22 CN CN202111235710.9A patent/CN113813042B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995001751A1 (en) * | 1993-07-01 | 1995-01-19 | Boston Scientific Corporation | Imaging, electrical potential sensing, and ablation catheters |
| KR20010010873A (en) * | 1999-07-23 | 2001-02-15 | 구자홍 | Axial sealing structure for turbo compressor |
| CN103016736A (en) * | 2012-12-20 | 2013-04-03 | 四川日机密封件股份有限公司 | Hydraulic/air pressure controlled mechanical seal device |
| CN203138676U (en) * | 2013-04-12 | 2013-08-21 | 刘元东 | Bipolar coagulation forceps capable of dropping water automatically |
| CN106286954A (en) * | 2016-09-29 | 2017-01-04 | 黄建斌 | Pipeline self body regulation valve and execution device |
| CN108119661A (en) * | 2016-11-29 | 2018-06-05 | 长城汽车股份有限公司 | Fluid switching valve and radiator and vehicle |
| WO2018129466A1 (en) * | 2017-01-06 | 2018-07-12 | Nxthera, Inc. | Transperineal vapor ablation systems and methods |
| CN210228276U (en) * | 2018-02-06 | 2020-04-03 | 马晓琳 | Auxiliary needle for lumbar puncture |
| WO2019206042A1 (en) * | 2018-04-23 | 2019-10-31 | 南京微创医学科技股份有限公司 | Multifunctional high-frequency electric knife |
| EP3574858A1 (en) * | 2018-05-09 | 2019-12-04 | Zhejiang Pengtian Medical Instrument Co., Ltd. | Cutting knife with adjustable needle and using method thereof |
| CN110236669A (en) * | 2019-05-28 | 2019-09-17 | 安瑞医疗器械(杭州)有限公司 | A kind of linkage structure of endoscopic instrument |
| WO2021027397A1 (en) * | 2019-08-13 | 2021-02-18 | 上海导向医疗系统有限公司 | Adjustable cryoablation needle |
| CN112353471A (en) * | 2020-11-11 | 2021-02-12 | 刘建平 | Fetal head suction midwifery device for obstetrics and gynecology department |
| CN113476138A (en) * | 2021-08-24 | 2021-10-08 | 杭州维纳安可医疗科技有限责任公司 | Ablation device and pulse ablation system |
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