CN113813042A - Electrode needle and electrode device - Google Patents
Electrode needle and electrode device Download PDFInfo
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- CN113813042A CN113813042A CN202111235710.9A CN202111235710A CN113813042A CN 113813042 A CN113813042 A CN 113813042A CN 202111235710 A CN202111235710 A CN 202111235710A CN 113813042 A CN113813042 A CN 113813042A
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- 238000007789 sealing Methods 0.000 claims abstract description 118
- 239000012530 fluid Substances 0.000 claims abstract description 98
- 239000007788 liquid Substances 0.000 claims description 70
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 8
- 210000001519 tissue Anatomy 0.000 description 14
- 238000007599 discharging Methods 0.000 description 7
- 210000003205 muscle Anatomy 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 7
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 206010028980 Neoplasm Diseases 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001575 pathological effect Effects 0.000 description 4
- 238000002679 ablation Methods 0.000 description 3
- 230000006907 apoptotic process Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000036285 pathological change Effects 0.000 description 2
- 231100000915 pathological change Toxicity 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001640 apoptogenic effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004520 electroporation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000008105 immune reaction Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004118 muscle contraction Effects 0.000 description 1
- 210000001539 phagocyte Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—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
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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
- A61B2018/00571—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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1425—Needle
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- 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 needle 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 connected with the inner wall of the shell in a sliding way; the housing comprises 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 axial moving range of the sealing structure along the needle core and 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 relative to the shell and the needle tube along the axial direction. According to the embodiment of the application, the fluid pressure difference on the two sides of the sealing structure is adjusted, the needle core is driven along the axial direction, the moving position is accurately controlled, and the discharge size of the electrode needle can be adjusted and controlled.
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 characterized in that an electrode needle is inserted into a human body, a plurality of nanoscale irreversible pore passages are formed on the surface of a cell membrane by releasing high-voltage electric pulses, the stable state of cells is destroyed, the rapid apoptosis of the cells is promoted, cell fragments after the apoptosis are phagocytized by phagocytes in the body, and meanwhile, an immune reaction occurs.
At present, the control difficulty of the size (and the actual discharge size) of the electrode needle actually 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 the fact that current flows through muscle tissues can be caused, the pain of a patient can be increased, the electrode needle is easy to shift, and the control difficulty of an ablation area is increased.
Disclosure of Invention
This application provides an electrode needle and electrode device to the shortcoming of current mode for solve the great technical problem of the electrode needle discharge size control degree of difficulty that prior art exists.
In a first aspect, an embodiment of the present application provides an electrode needle, including: the needle 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 positioned in the shell, and the sealing structure is connected with the inner wall of the shell in a sliding way; the housing includes a first fluid interface and a second fluid interface; the first fluid interface and the second fluid interface are respectively located on two sides of the axial moving range of the sealing structure along 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 relative to the shell and the needle tube along the axial direction.
Optionally, a first wall, a first limiting piece, a second limiting piece and a second wall are sequentially and alternately arranged in the housing along the axial direction of the stylet; the first limiting piece and the second limiting piece both comprise through holes; the housing between the first wall and the first retainer forms a first cavity that communicates with the first fluid port; 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 retaining member and the second wall forms a third cavity that communicates with the second fluid interface.
Optionally, the first fluid interface comprises a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet being respectively in communication with the first cavity; the second fluid interface comprises a second liquid inlet and a second liquid outlet, and the second liquid inlet and the second liquid outlet are respectively communicated with the third cavity.
Optionally, the first fluid interface includes a first gas inlet/outlet, and the first gas inlet/outlet is communicated with the first cavity and is used for adjusting the gas flow on the 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 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 the sealing ring is used for sealing between the sealing structure and the inner wall of the shell.
Optionally, a third wall is further disposed in the housing, and the third wall is located on a side of the first wall away from the first limiting member; the electrode needle further comprises an isolating ring, the isolating ring is arranged between the third wall and the first wall, the isolating ring is used for being sleeved outside the needle core, and the inner annular surface of the isolating ring is used for being in sliding contact with the surface of the needle core so as to peel off dust on the surface of the needle core and collect the dust on the surface of the needle core at the position of the isolating 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 part; 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 insulating needle tube.
Optionally, the electrode needle comprises at least one of: the first end of the needle core is radially protruded 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: one end of the first joint is connected with the first fluid interface, and the other end of the first joint 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, including an electrode needle according to any one of the first embodiment 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 beneficial technical effects brought by the technical scheme provided by the embodiment of the application comprise:
firstly, the power for driving the sealing structure to move is provided through the fluid pressure difference of two opposite sides of the sealing structure arranged at the first end of the needle core so as to control the needle core to move, and further the distance between the second end of the needle core and one end of the needle tube far away from the shell is controlled, namely the discharge size is adjustable, so that different operation ranges are adjusted, and the application scenes of the electrode needle are widened. Secondly, through the control to the size of discharging, the position of adjustment removal nook closing member second end for the needle tubing promptly, can prevent the human muscle shrink that the size of discharging too big caused, and then avoid or weaken the electrode needle that causes because of muscle shrink and remove to realize melting regional control, improve and melt efficiency and effect of melting. In addition, the second end of the needle core moves in the needle tube for multiple times to adjust the discharge sizes with different sizes, and multiple damages caused by repeatedly inserting and pulling out the human body to adjust the discharge sizes are avoided.
Additional aspects and advantages of the present 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 present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an electrode needle provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of an electrode needle in a top view according to an embodiment of the present disclosure;
FIG. 3 is a schematic sectional view of an electrode needle according to an embodiment of the present disclosure;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic structural diagram of another electrode needle provided in the embodiments of the present application;
FIG. 6 is a schematic top view of another electrode needle according to an embodiment of the present disclosure;
FIG. 7 is a schematic sectional view of another electrode needle according to an embodiment of the present disclosure;
fig. 8 is a partial enlarged view of fig. 7 at B.
Reference numerals and descriptions:
1-a shell; 11-a first housing body; 12-a second housing body; 13-a first wall; 14-a first stop; 15-a second limit; 16-a second wall; 17-third wall;
2-a needle core; 21-a sealing structure;
3-a needle tube;
4-a first fluidic interface; 41-a first liquid inlet; 42-a first liquid outlet;
5-a second fluidic interface; 51-a second liquid inlet; 52-a second liquid outlet;
6-sealing ring;
7-a first joint; 71-a first sub-junction; 72-a second sub-linker;
8-a second linker; 81-a third sub-linker; 82-a fourth sub-junction;
9-a spacer ring;
10-connecting wires.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, 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. 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 the context clearly indicates otherwise. 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 solutions of the present application and how to solve the above technical problems with specific embodiments.
The embodiment of the application provides an electrode needle, the structure schematic diagram of the electrode needle 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 connected with the inner wall of the shell 1 in a sliding way.
The housing 1 comprises a first fluid connection 4 and a second fluid connection 5. The first fluid interface 4 and the second fluid interface 5 are respectively located at two sides of the axial moving range of the sealing structure 21 along the needle core 2, and are used for adjusting the fluid pressure difference along the axial direction at 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 housing 1 has a cylindrical main body, one end of the needle tube 3 is connected with one end of the housing 1 and is communicated with the inner cavity of the housing 1, and the needle tube 3 is coaxially arranged with the housing 1. The first end of the needle core 2 extends into the shell 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 stylet 2 is connected with the inner wall of the shell 1 in a sliding way. The first fluid interface 4 and the second fluid interface 5 are respectively arranged on the side surface of the shell 1 and are respectively arranged at the position close to the end part of the shell 1, and the first fluid interface 4 and the second fluid interface 5 are both communicated with the inner cavity of the shell 1. Fluid pressure is formed on one side of the sealing structure 21 by fluid introduced through the first fluid connector 4, fluid pressure is formed on the other side of the sealing structure 21 by fluid introduced through the second fluid connector 5, and a 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 axially in the needle tube 3.
In the embodiment of the present application, first, the fluid pressure difference at two opposite sides of the sealing structure 21 disposed at the first end of the stylet 2 provides power for driving the sealing structure 21 to move, so as to control the movement of the stylet 2, and further control the distance between the second end of the stylet 2 and the end of the needle tube 3 away from the housing 1, that is, the discharge size is adjustable, so as to adjust different operation ranges, thereby widening the application scenarios of the electrode needle. Secondly, through the control to the size of discharging, the position of adjustment removal nook closing member 2 second end for the needle tubing promptly, can prevent the human muscle shrink that the size of discharging too big caused, and then avoid or weaken the electrode needle that causes because of muscle shrink and remove to realize melting regional control, improve and melt efficiency and effect of melting. In addition, the second end of the needle core 2 moves in the needle tube 3 for a plurality of times to adjust the discharge sizes with different sizes, and 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 includes a first housing body 11 and a second housing body 12 that are detachably connected, at least a portion of the first fluid interface 4 may be disposed on the first housing body 11, and at least a portion of the second housing body 12 may be disposed on the second housing body 12. The first housing body 11 and the second housing body 12 are detachably connected, so that the needle core 2 can be conveniently replaced by an operator.
Optionally, the needle tube 3 is detachably connected with the housing 1, for example, the needle tube 3 is screwed with the housing 1, and the needle tube 3 is conveniently replaced by an operator by arranging the needle tube 3 and the housing 1 to be detachably connected.
Alternatively, as shown in fig. 1-3 and 5-7, the housing 1 is provided with a connecting wire 10 at one end remote from the needle cannula 3, the connecting wire 10 being connected at one end to the hub 2 and at the other end to an impulse-generating device for releasing an electric impulse at the second end of the hub 2.
Optionally, as shown in fig. 3, 4, 7 and 8, a first wall 13, a first limiting member 14, a second limiting member 15 and a second wall 16 are sequentially and alternately arranged in the housing 1 along the axial direction of the stylet 2; the first limiting member 14 and the second limiting member 15 each include a through hole; the housing 1 between the first wall 13 and the first retaining member 14 forms a first cavity, which communicates with the first fluid port 4; the housing 1 between the first limiting member 14 and the second limiting member 15 forms a second cavity, and the sealing structure 21 is located in the second cavity; 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 limiting member 15 and the second wall 16 forms a third chamber, which communicates with the second fluid connection 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 embodiments, an optional embodiment is provided, and both the first limiting member 14 and the second limiting member 15 are limiting plates. The first wall 13, the first retaining member 14, the second retaining member 15, and the second wall 16 may be disposed perpendicular to the axial direction of the housing 1. The through holes formed in the first limiting member 14 and the second limiting member 15 include a first through hole, the axial direction of the first through hole is formed along the axial direction of the housing 1, and the first through hole is used for the passage of the stylet 2 so as to limit the moving direction of the stylet 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, and the second through holes of the first limiting piece 14 are used for communicating the first cavity with the second cavity and are used for communicating fluids in the first cavity and the second cavity; 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. The second cavity comprises a first sub-cavity and a second sub-cavity, the first sub-cavity is a space between the first limiting joint and the sealing structure 21, and the first sub-cavity is communicated with the first cavity; the second sub-cavity is a space between the second limiting member 15 and the sealing structure 21, and the second sub-cavity is communicated with the third cavity. The first sub-cavity is not communicated with the second sub-cavity.
The first limiting member 14 and the second limiting member 15 are used for limiting the sealing structure 21 in 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 pressure on 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 to a position between the end part of the shell 1 and the fluid interface, so that fluid pressure can not be formed at one side of the sealing structure 21 close to the end part, the loss of the capacity of regulating and controlling fluid pressure difference at two sides is avoided, and the regulation and control flexibility is reduced.
Optionally, as shown in fig. 4, the electrode needle further comprises a sealing ring 6, the sealing ring 6 is coaxially arranged with the needle core 2 and is sleeved outside the sealing structure 21 for forming a seal between the sealing structure 21 and the inner wall of the housing 1.
In a possible embodiment, a groove is arranged along the surface of the sealing structure 21, and the sealing ring 6 is filled in the groove and protrudes from the surface of the sealing structure 21 to realize tight connection with the inner wall of the shell 1, so that the sealing performance is increased to ensure that the sealing structure 21 is not communicated with the 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, 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 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 and collect dust on the surface of the needle core 2 at 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 located away from the first wall 13, and the third wall 17 is located close to the needle cannula 3. The isolating ring 9 is arranged outside the needle core 2 in a sleeved mode, the isolating ring 9 can be arranged by being attached to the third wall 17, also can be arranged by being attached to the first wall 13, and also 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 surface of the inner ring of the isolating ring 9 is in close contact with the outer surface of the needle core 2, and in the moving process of the needle core 2, the surface of the inner ring of the isolating 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 guaranteed.
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 as to avoid the needle core 2 from moving into the shell 1 completely, so that 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 the pore for the needle core 2 to pass through and polluting the needle core 2.
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 part; 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 optional embodiment is provided, the tip portion arranged at one end, far away from the shell 1, of the needle tube 3 is used for puncturing human tissues, the needle tube 3 is inserted into tumor tissues of a human body and is moved to a proper position, the second end of the needle core 2 is controlled to move, the length of the needle core inserted into the human body is adjusted, the insulating layer is plated on the outer surface of the needle core 2, the distance from the second end of the needle core 2 to one end, far away from the shell 1, of the needle tube 3 is determined, namely the discharge size of the electrode needle is determined, the ablation action range of the electrode needle is determined, and flexible adjustment of the position depth of discharge is achieved.
Optionally, the wall of the needle tube 3 is provided with a structure for exposing the needle core 2, and the structure may be a hollow, a groove or an opening structure.
The needle cannula 3 is made of an insulating material or is prepared by an insulating process, for example, by applying an insulating coating to the outer side of the needle cannula 3. The needle tube 3 is used for preventing the needle core 2 from contacting with the non-pathological tissue around the pathological tissue when the needle core 2 contacts with the pathological tissue, so that the biological tissue except the pathological tissue can not be damaged. Namely, by arranging the needle tube 3, only the pathological change cells directly contacted with the needle core 2 can be apoptotic, and the phenomenon of apoptosis of cells at other positions due to the contact with the needle core 2 is prevented, so that the safety of the electrode needle is improved, the electrode needle can be suitable for pathological change tissues with different depths and/or sizes, and the application scenes of the electrode needle are widened.
Optionally, as shown in fig. 3 and 7, the electrode needle comprises at least one of: a 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, in which 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 housing 1, and the sealing structure 21 is driven to move by adjusting the fluid pressure difference at the two sides of the sealing structure 21, so as to form a driving structure similar to a "piston", thereby ensuring that the stylet 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 adjusting device; one end of the second connector 8 is connected with the second fluid interface 5, and the other end is used for being connected with a fluid adjusting device.
On the basis of the above embodiment, an alternative embodiment is provided, in which the electrode needle further comprises a first connector 7 and a second connector 8 for connecting a device, such as a fluid regulating device, which is adapted to cooperate with the electrode needle. The first joint 7 and the second joint 8 can be self-sealing quick-through joints with the model of KCH06-01S, and the first joint 7 and the second joint 8 can comprise joint bodies and cover parts connected with the joint bodies.
Optionally, the first fluid interface 4 and the second fluid interface 5 include hole walls with hole walls protruding from the surface of the housing 1, threads are disposed on inner sides of the hole walls, and the first joint 7 and the second joint 8 are detachably connected to the first fluid interface 4 and the second fluid interface 5 through the threads, respectively.
Optionally, 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 respectively communicating with the first cavity; 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, for the electrode needle driven with liquid fluid, a liquid inlet and outlet is provided. The first liquid inlet 41 and the first liquid outlet 42 may be oppositely disposed, the axial directions of the first liquid inlet 41 and the first liquid outlet 42 may be on the same straight line, correspondingly, the first joint 7 includes a first sub-joint 71 and a second sub-joint 72, one end of the first sub-joint 71 is connected with the first liquid inlet 41, and the other end is connected with the liquid regulating device, for introducing liquid into the housing; the second sub-fitting 72 is connected at one end to the second fluid inlet 42 for receiving fluid from the housing. The liquid pressure on the side of the sealing structure 21 is adjusted and determined by the cooperation of the incoming and outgoing liquid. For example, opening the first liquid inlet 41 and closing the first liquid outlet 42 increases the liquid pressure on one side of the seal structure 21; alternatively, closing the first liquid inlet 41 and opening the first liquid outlet 42 reduces the liquid pressure on the side of the seal structure 21.
The second liquid inlet 51 and the second liquid outlet 52 can be arranged oppositely, the axial directions of the second liquid inlet 51 and the second liquid outlet 52 can be on the same straight line, correspondingly, the second joint 8 comprises a third sub-joint 81 and a fourth sub-joint 82, one end of the third sub-joint 81 is connected with the second liquid inlet 52, and the other end is connected with the liquid regulating device and used for introducing liquid into the shell; the fourth sub-connector 82 is connected at one end to the first fluid inlet 51 for receiving fluid from the housing. The liquid pressure on the other side of the sealing structure 21 is adjusted and determined by the cooperation of the incoming and outgoing liquid. By means of bilateral control of the fluid pressure on the two sides of the sealing structure 21, the liquid pressure difference on the two sides of the sealing structure 21 can be determined more quickly and accurately, the moving direction and distance of the driving sealing structure 21 are determined, the position of the second end of the needle core 2 is adjusted, 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 (the end far away from the shell 1) of the needle tube 3 is used for puncturing the human tissue and moving to a proper position in the tumor tissue of the human body, so that the needle tube 3 is kept not to move. 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, the third sub-joint 81 is opened, liquid is introduced into the third cavity by using the second liquid inlet 52, meanwhile, the fourth sub-joint 82 connected with the first liquid inlet 51 is closed, so that liquid pressure is formed on one side of the sealing structure 21, the liquid pressure is greater than the other side of the sealing structure 21, the pressure acting on one end face of the sealing structure 21 pushes the sealing structure 21 to move towards the first cavity, 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 and adjusted to the designed discharge size, 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-joint 71 is opened, liquid is introduced into the first cavity by using the first liquid inlet 41, the second sub-joint 72 connected with the first liquid inlet 42 is closed, the liquid is introduced into the first cavity, and the liquid pressure on the other side of the sealing structure 21 is increased; meanwhile, the fourth sub-joint 82 connected with the first 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 greater 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.
Optionally, as shown in fig. 5 to 8, the first fluid port 4 includes a first gas inlet/outlet, and the first gas inlet/outlet is communicated with the first cavity and is used for adjusting the gas flow rate on the side of the sealing structure 21 away from the third cavity; the second fluid port 5 includes a second gas inlet/outlet, which is communicated with the third chamber and is used for adjusting the gas flow rate at the side of the sealing structure 21 far from the first chamber.
In a possible embodiment, for the electrode needle driven with a gaseous fluid, a gas inlet and outlet is provided. The first sub-joint 7 is connected with a first gas inlet and outlet, and the first gas inlet and outlet adjusts and determines the gas pressure on one side of the sealing structure 21 by introducing or flowing gas; the second sub-joint 8 is connected with a second gas inlet and outlet, and the second gas inlet and outlet adjusts and determines the gas pressure on the other side of the sealing structure 21 by introducing or discharging gas. Through the mode of respectively controlling the two sides of the gas pressure at the two sides of the sealing structure 21 and controlling the fluid pressure at the two sides of the sealing structure 21 through the two sides, the liquid pressure difference at the two sides of the sealing structure 21 can be determined more quickly and accurately, the moving direction and the distance of the driving sealing structure 21 are determined, the position of the second end of the needle core 2 is adjusted, 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 (the end far away from the shell 1) of the needle tube 3 is used for puncturing the human tissue and moving to a proper position in the tumor tissue of the human body, so that the needle tube 3 is kept not to move. 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, the second sub-joint 8 is opened, gas is introduced into the third cavity through the second gas inlet and outlet, so that gas pressure is formed on one side of the sealing structure 21, the gas pressure is larger than 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 and adjusted to the designed discharge size, 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 by using the first gas inlet and outlet, so that the gas is introduced into the first cavity, and the gas pressure on the other side of the sealing structure 21 is increased; meanwhile, the second connector 8 is opened to enable the gas on one side of the sealing structure 21 to flow out, the gas pressure on one side of the sealing structure 21 is reduced, the gas pressure on the other side of the sealing structure 21 is greater than the gas pressure on one side of the sealing structure 21, the generated gas pressure difference pushes the sealing structure 21 to move towards the direction of the third cavity, and then 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.
In one possible embodiment, for another electrode needle driven by gaseous fluid, a first wall 13, a first retaining member 14 and a second wall 16 are included in the housing 1, a first cavity is formed between the first wall 13 and the first retaining member 14, and a fourth cavity is formed between the first retaining member 14 and the second wall 16. The sealing structure 21 arranged at the first end of the needle core 2 is positioned 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 a fixed gas pressure, gas passes through or flows out through 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 between two opposite sides of the sealing structure 21 is adjusted in a single-side adjustment mode, the sealing structure 21 is driven to move 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 electrode needle in this embodiment is similar to that of the electrode needle in the previous embodiment, and therefore, the description thereof is omitted.
Based on the same inventive concept, the embodiment of the present application provides an electrode device, which comprises the electrode needle of any one of the previous embodiments of the present application, a pulse generation device electrically connected with the electrode needle, and a fluid regulation device connected with the electrode needle.
The electrode needle in this embodiment is the electrode needle in the foregoing embodiment, and the structure and the using method thereof are not described again.
By applying the embodiment of the application, at least the following beneficial effects can be realized:
firstly, the power for driving the sealing structure 21 to move is provided through the fluid pressure difference of the 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 further 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 discharge size is adjustable, so as to adjust different operation ranges, thereby widening the application scenes of the electrode needle. Secondly, through the control to the size of discharging, the position of adjustment removal nook closing member 2 second end for the needle tubing promptly, can prevent the human muscle shrink that the size of discharging too big caused, and then avoid or weaken the electrode needle that causes because of muscle shrink and remove to realize melting regional control, improve and melt efficiency and effect of melting. In addition, the second end of the needle core 2 moves in the needle tube 3 for a plurality of times to adjust the discharge sizes with different sizes, and 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 is to 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 those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. An electrode needle, comprising: the needle 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 positioned in the shell, and the sealing structure is connected with the inner wall of the shell in a sliding way;
the housing includes a first fluid interface and a second fluid interface;
the first fluid interface and the second fluid interface are respectively located on two sides of the axial moving range of the sealing structure along 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 relative to the shell and the needle tube along the axial direction.
2. The electrode needle according to claim 1,
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 arranged in the shell at intervals;
the first limiting piece and the second limiting piece both comprise through holes;
the housing between the first wall and the first retainer forms a first cavity that communicates with the first fluid port;
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 retaining member and the second wall forms a third cavity that communicates with the second fluid interface.
3. The electrode needle according to claim 2,
the first fluid interface comprises a first liquid inlet and a first liquid outlet, and the first liquid inlet and the first liquid outlet are respectively communicated with the first cavity;
the second fluid interface comprises a second liquid inlet and a second liquid outlet, and the second liquid inlet and the second liquid outlet are respectively communicated with the third cavity.
4. The electrode needle according to claim 2,
the first fluid interface comprises a first gas inlet and outlet which is communicated with the first cavity and used for adjusting the gas flow on one side of the sealing structure, which is far 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 of one side, far away from the first cavity, of the sealing structure.
5. The electrode needle according to claim 1, further comprising: a seal ring;
the sealing ring and the needle core are coaxially arranged and sleeved outside the sealing structure, and the sealing ring is used for sealing between the sealing structure and the inner wall of the shell.
6. The electrode needle according to claim 2,
a third wall is further arranged in the shell and is positioned on one side, far away from the first limiting piece, of the first wall;
the electrode needle further comprises an isolating ring, the isolating ring is arranged between the third wall and the first wall, the isolating ring is used for being sleeved outside the needle core, and the inner annular surface of the isolating ring is used for being in sliding contact with the surface of the needle core so as to peel off dust on the surface of the needle core and collect the dust on the surface of the needle core at the position of the isolating ring.
7. 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 part; 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 insulating needle tube.
8. The electrode needle of claim 1, comprising at least one of:
the first end of the needle core is radially protruded to form a cylindrical sealing structure;
the sealing structure and the needle core are integrally formed.
9. The electrode needle of claim 1, further comprising at least one of:
one end of the first joint is connected with the first fluid interface, and the other end of the first joint 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.
10. An electrode device, comprising an electrode needle according to any one of claims 1 to 9, a pulse generating device electrically connected to the electrode needle, and a fluid regulating device connected to the electrode needle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235710.9A CN113813042B (en) | 2021-10-22 | 2021-10-22 | Electrode needle and electrode device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235710.9A CN113813042B (en) | 2021-10-22 | 2021-10-22 | Electrode needle and electrode device |
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| CN113813042B CN113813042B (en) | 2023-12-05 |
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| CN113813042B (en) | 2023-12-05 |
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