CN109223170A - Coaxial silk guide passage for radio frequency ablation catheter - Google Patents
Coaxial silk guide passage for radio frequency ablation catheter Download PDFInfo
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- CN109223170A CN109223170A CN201710557578.0A CN201710557578A CN109223170A CN 109223170 A CN109223170 A CN 109223170A CN 201710557578 A CN201710557578 A CN 201710557578A CN 109223170 A CN109223170 A CN 109223170A
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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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Abstract
The invention discloses a kind of coaxial silk guide passage for radio frequency ablation catheter, which is arranged along the axial direction of radio frequency ablation catheter, and the central axis of silk guide passage and the central axis of radio frequency ablation catheter substantially overlap.Radio frequency ablation catheter containing above-mentioned coaxial silk guide passage, can retain the setting of guiding wire and silk guide passage, while can reduce guiding wire push resistance again, avoid seal wire from being wound in conduit, the problems such as seal wire coating is fallen.
Description
Technical field
The present invention relates to electrosurgery more particularly to a kind of coaxial silk guide passages for radio frequency ablation catheter, and including
The radio frequency ablation catheter of this coaxial silk guide passage.
Background technique
Radio-frequency ablation procedure is and to discharge radio-frequency current by the way that electrode catheter intravascular is sent into privileged site to treating disease
The technology of disease.For example, renal artery radiofrequency ablation art is a kind of by the way that electrode catheter intravascular is sent into privileged site in the arteria renalis,
Release radio-frequency current causes arteria renalis sympathetic nerve local solidification downright bad, reaches denervated interventional techniques.For another example heart
Radio-frequency ablation procedure is that electrode catheter is sent into chambers of the heart privileged site through vein or arteries, and release radio-frequency current leads to the local heart
Inner membrance and subendocardiac muscle coagulation necrosis reach the Interventional skill for blocking tachy-arrhythmia Accessory pathway and originating point
Art.
In conventional radio frequency ablation catheter product, one kind is to enter predetermined position by guiding wire guiding catheter.
In this kind of product, it is set side by side with a plurality of cavities in conduit, one of chamber portion or is all formed by metal material, is used
Make the channel of guiding wire.But due to the channel of guiding wire relative to the center of conduit be biasing, guiding is led
Silk push resistance is larger.In addition, metal material can wipe the hydrophilic coating on guiding wire off in guiding wire moving process,
The hydrophilic coating wiped off can fall off in blood vessel, cause damages to patient health.When rotary guide pipe is adjusted, guiding wire
Can also be wound on conduit, cause guiding wire that can not be moved forward and backward, influence using.For being provided with the conduit of fast exchange mouth
Product, fast exchange mouth is for drawing guiding wire and operating to guiding wire, once there is guiding wire recession excessively,
When more than fast exchange mouth, just it is difficult to penetrate again, can not thus adjusts the spiral-shaped of catheter proximal end electrode portion, cause to disease
The damage of people's blood vessel.
Another kind of radio frequency ablation catheter product enters predetermined position without using guiding wire guiding catheter.However, present
Clinician has generally received guiding wire as the routine of intervention operation and has used attachment, therefore, leads to not using
The catheter product acceptance of silk is lower.In addition, good guiding and protection can be played the role of using guiding wire, if not applicable
Guiding wire, conduit will be difficult to enter the blood vessel of complicated bend, especially bigger to the operation difficulty of vessel branch.
Therefore, those skilled in the art is dedicated to developing a kind of radio frequency ablation catheter, can retain guiding wire and
The setting of silk guide passage, while can reduce guiding wire again and push resistance avoids seal wire winding, coating the problems such as falling.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide one kind disappears for radio frequency
Melt the coaxial silk guide passage of conduit, predetermined position can be reached by guiding wire guiding catheter, while reducing because of silk guide passage
The problems such as guiding wire caused by biasing pushes resistance, and seal wire winding, coating is avoided to fall.
To achieve the above object, a kind of same spindle guide for radio frequency ablation catheter is provided in better embodiment of the present invention
Silk channel, the silk guide passage are arranged along the axial direction of radio frequency ablation catheter, the central axis of the silk guide passage and radio frequency ablation catheter
Central axis substantially overlaps.
Further, which consists of three layers:
Internal layer, the cavity that internal layer is formed can accommodate guiding wire, and internal layer is arranged to reduce and rubs with guiding wire
It wipes；
Middle layer, middle layer is located at the outside of internal layer, and fits closely with internal layer, and middle layer is arranged to bond the interior of silk guide passage
Layer and outer layer；
Outer layer, outer layer is located at the outside in middle layer, and fits closely with middle layer, and outer layer is positioned to provide the soft of silk guide passage
Toughness, adhesiveness and workability.
Further, the internal diameter of above-mentioned cavity be slightly larger than guiding wire diameter, cavity internal diameter setting mainly for
It closes the diameter of guiding wire and saves space.
Preferably, the internal diameter of above-mentioned cavity is 0.37~0.60mm.
Further, internal layer is formed by high molecular material.
Preferably, the high molecular material that internal layer uses is HDPE, PTFE, FEP or PET.
Preferably, internal layer with a thickness of 0.015~0.15mm.
Further, middle layer is formed by polymeric adhesion material.
Preferably, the polymeric adhesion material that middle layer uses is LLDPE, EVA or PE.
Further, outer layer is formed by high molecular material.
Preferably, the high molecular material that outer layer uses is Pebax, TPU or TPE etc..
Another aspect provides a kind of radio frequency ablation catheters containing coaxial silk guide passage.
In another better embodiment of the invention, the radio frequency ablation catheter that should contain coaxial silk guide passage includes being used for
Carry out the adjusting component of Physiological effect and the transfer unit for the adjusting component to be transported to setting position；
Adjusting component includes for will adjust energy transmission to the electrode of setting position and be used to carry holding for the electrode
Carry component；
Load bearing component has first shape and the second shape, under first shape, adjusts component and is suitable for moving in the blood vessel；
Under the second shape, at least one electrode, which is in, is suitble to adjust energy transmission to setting position；
The radio frequency ablation catheter is internally provided with silk guide passage, and silk guide passage runs through entire radio frequency ablation catheter, and leads
The central axis in silk channel and the central axis of radio frequency ablation catheter substantially overlap.
Further, which consists of three layers:
Internal layer, the cavity that internal layer is formed can accommodate guiding wire, and internal layer is arranged to reduce and rubs with guiding wire
It wipes；
Middle layer, middle layer is located at the outside of internal layer, and fits closely with internal layer, and middle layer is arranged to bond the interior of silk guide passage
Layer and outer layer；
Outer layer, outer layer is located at the outside in middle layer, and fits closely with middle layer, and outer layer is positioned to provide the soft of silk guide passage
Toughness, adhesiveness and workability.
Preferably, the internal diameter of above-mentioned cavity is slightly larger than the diameter of guiding wire.
Preferably, the internal diameter of above-mentioned cavity is 0.37~0.60mm.
Further, internal layer with a thickness of 0.015~0.15mm.
Further, the internal layer is formed by the first high molecular material, and the middle layer is formed by polymeric adhesion material, institute
Outer layer is stated to be formed by the second high molecular material.
Preferably, the first high molecular material is HDPE, PTFE, FEP or PET；Polymeric adhesion material be LLDPE, EVA or
PE；Second high molecular material is Pebax, TPU, Nylon or TPE.
Further, which further includes support tube, inner insulating layer, external insulation layer and conducting wire:
Support tube is located at the outside of the silk guide passage；
The outside of support tube is arranged in inner insulating layer；
The outside of inner insulating layer is arranged in external insulation layer；
Conducting wire is arranged between inner insulating layer and external insulation layer, for providing the adjusting energy and monitoring ablation for electrode
When temperature and impedance.
Preferably, support tube is NiTi pipe or stainless steel tube.
Further, above-mentioned external insulation layer is made of the external insulation layer of transfer unit and the external insulation layer of load bearing component.
Preferably, the external insulation layer of load bearing component is that TPU is managed or Pebax is managed；The external insulation layer of transfer unit be PET or
FEP heat-shrink tube.
The radio frequency ablation catheter containing coaxial silk guide passage in a specific embodiment of the invention, due to silk guide passage with
The center overlapping of axles of conduit substantially overlap and the three-layer set of silk guide passage, therefore have relative to existing conduit more
Kind advantage:
1) retain silk guide passage, conduit is made to remain to be oriented to by guiding wire.
Guiding wire is the routine of intervention operation using attachment, can play the role of guiding and protection, clinician is non-
Often get used to using guiding wire when intervening operation.If not meeting the use habit of clinician without silk guide passage.Separately
Outside, conduit is difficult to enter the blood vessel of complicated bend；During clinical operation, doctor is also required to grasp vessel branch sometimes
Make, the conduit of no silk guide passage also hardly enters vessel branch.
The radio frequency ablation catheter of a specific embodiment of the invention remains silk guide passage, can be used cooperatively and lead
Silk, meets the operating habit of doctor.In addition, there is the guiding role of guiding wire, conduit easily enter complicated bend blood vessel and
Vessel branch；
2) the push resistance of guiding wire is reduced；
3) it being made due to silk guide passage internal layer of high molecular material, the smooth surface of formation is conducive to protect guiding wire,
In order to avoid the hydrophilic coating of guiding wire is scraped；The outer layer of silk guide passage is also made of high molecular material, high molecular material tool
There is certain toughness, can effectively prevent fractureing for silk guide passage；
4) conduit, which can according to need rotation any angle, is bonded electrode with vascular wall, guiding wire will not be caused to wind
In supravasal situation；
5) since there is no fast exchange mouth, therefore there is no guiding wire recession to be excessively difficult to the problem of penetrating again,
Prevent load bearing component that can not form the state for being suitable for mobile transport and damage blood vessel.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is the schematic diagram of the radio frequency ablation catheter of a preferred embodiment of the invention.
Fig. 2 is the magnified partial view of the radio frequency ablation catheter in Fig. 1.
Fig. 3 is transfer unit in Fig. 1 along sectional view along A-A.
Fig. 4 is the cross-sectional view of silk guide passage in Fig. 3.
Specific embodiment
In the present invention, the abbreviation used:
HDPE refers to high density polyethylene (HDPE), i.e. High Density Polyethylene；
TPE refers to thermoplastic elastomer (TPE), i.e. Thermoplastic Elastomer；
PTFE refers to polytetrafluoroethylene (PTFE), i.e. Polytetrafluoroethylene；
PE refers to polyethylene, i.e. Polyethylene；
FEP refers to fluorinated ethylene propylene copolymer, i.e. Fluorinated ethylene propylene；
TPU refers to thermoplastic polyurethane elastomer, i.e. Thermoplastic polyurethanes；
PET refers to polyethylene terephthalate, i.e. Polyethylene terephthalate；
LLDPE refers to linear low density polyethylene, i.e. Linear low density polyethylene；
EVA refers to ethylene-vinyl acetate copolymer, i.e. Ethylene Vinyl Acetate Copolymer；
The performance of Atochem (FR) Cedex 22, 94091 Paris La Defense, France of Pebax fingering state (ATO Chimie) development is between synthetic rubber and thermoplastic poly ammonia
Polyether block phthalein amine elastomer between vinegar, the trade mark are known as Pebax.
For ease of description, by the close user or the separate neural site for needing to adjust of device or component in the present invention
One end be known as " proximal end ", be known as by separate the user of device or component or close to the one end in the neural site that needs are adjusted
" distal end ".
As illustrated in fig. 1 and 2, radio frequency ablation catheter includes for adjusting neural adjusting component 100 and will adjust component
100 are transported to the transfer unit 201 in predetermined position.Adjusting component 100 includes the electrode that will adjust energy transmission to predetermined position
101 and the load bearing component 102 for carrying electrode 101.Load bearing component 102 has first shape and the second shape, first
Under shape, adjusts component 100 and be suitable for moving in the blood vessel；Under the second shape, at least one electrode 101, which is in, will adjust energy
It is transmitted to predetermined position.Load bearing component 102 and transfer unit 201 are integrated, the proximal end of load bearing component 102 and transfer unit
201 distal end is connected.Fig. 1 and 2 shows the second state of load bearing component 102.
In one embodiment of coaxial silk guide passage of the invention, the load bearing component 102 of radio frequency ablation catheter and conveying
Component 201 is tubulose, and internal structure is similar, all includes silk guide passage.By taking transfer unit 201 as an example, as shown in figure 3, leading
Silk channel 300 is located at the center of inside of transfer unit 201, the axis coincidence of the axis and transfer unit 201 of silk guide passage 300 or
It substantially overlaps.The silk guide passage 300 is made of three-decker, as shown in figure 4, along 201 tubulose of transfer unit it is radial from it is interior to
It is followed successively by internal layer 301, middle layer 302 and outer layer 303 outside.Internal layer 301 provides smooth surface, reduces the friction with guiding wire,
To protect the guiding wire moved in the cavity 304 that internal layer is constituted.Middle layer 302 is located at the outside of internal layer, and middle layer is for gluing
Connect internal layer and outer layer.Outer layer 303 provides flexibility, adhesiveness and the workability of silk guide passage, and the flexility provided is protected
Shield silk guide passage is not broken in use, and workability is to be easy to the operation such as other materials bonding, pyrocondensation, fusion.It is interior
The cavity 304 that layer 301 is formed can accommodate guiding wire, and allow guiding wire wherein along the axial movement of transfer unit.
In in this embodiment, internal layer 301 is formed by the first high molecular material, and middle layer 302 is by polymeric adhesion material shape
At outer layer 303 is formed by the second high molecular material.First high molecular material is HDPE, PTFE, FEP or PET；The macromolecule
Adhesives is LLDPE, EVA or PE, plays the role of binder, internal layer 301 and outer layer 303 are bonded；Second high score
Sub- material is Pebax, TPU, Nylon or TPE.
The internal diameter of cavity 304 is slightly larger than the diameter of guiding wire.In one embodiment, the internal diameter of cavity 304 is
0.37~0.60mm.The thickness (i.e. the distance between the lateral surface of the medial surface of internal layer 301 to outer layer 303) of silk guide passage is
0.07~0.25mm.The thickness of internal layer 301 accounts for 201 thickness of transfer unit (the i.e. medial surface of internal layer 301 to transfer unit 201
The distance of lateral surface) 10~30%, the thickness in middle layer 302 accounts for the 3~10% of 201 thickness of transfer unit, the thickness of outer layer 303
Account for the 50~87% of 201 thickness of transfer unit.In a preferred embodiment, internal layer 301 with a thickness of 0.015~
0.15mm。
The silk guide passage of load bearing component 102 and the three-decker for constituting silk guide passage are identical as in transfer unit 201,
And the silk guide passage of load bearing component 102 is connected to the silk guide passage of transfer unit.
In another embodiment, the silk guide passage in the silk guide passage and transfer unit in load bearing component 102 is one
, i.e., internal layer, middle layer and outer layer in load bearing component 102 and internal layer, middle layer and outer layer in transfer unit 201 are integrated,
Also therefore, formation is also integrated for accommodating the cavity of guiding wire.Internal layer, middle layer and outer layer in load bearing component 102
Material, size it is also identical as the corresponding portion in transfer unit 201.
Support tube 401, inner insulating layer 402, external insulation layer are additionally provided on the outside of the silk guide passage inside transfer unit 201
403, the outside of silk guide passage 300 is arranged in support tube 401, and the outside of support tube 401, external insulation is arranged in inner insulating layer 402
The outside of inner insulating layer 402 is arranged in layer 403.
Support tube 401 is NiTi pipe or stainless steel tube.The external insulation layer 403 of transfer unit 201 is formed by high molecular material.
In one embodiment, the external insulation layer 403 of transfer unit 201 is PET or FEP heat-shrink tube, the thickness 0.012 after pyrocondensation~
0.15mm, 0.5~1.2mm of internal diameter.It is also equipped with external insulation layer on the outside of the silk guide passage inside load bearing component 102, by high score
Sub- material is formed.In one embodiment, the external insulation layer of load bearing component 102 be TPU manage or Pebax pipe, internal diameter be 0.7~
1.6mm, with a thickness of 0.05~0.15mm.
It is provided between the external insulation layer 403 and inner insulating layer 402 of transfer unit 201 for providing tune for electrode 101
The conducting wire 404 of temperature and impedance when amount of energy saving and monitoring ablation.Conducting wire 404 is along the axially extending of radio frequency ablation catheter, conducting wire
404 from the external insulation layer for extending to load bearing component 102 between the external insulation layer 403 and inner insulating layer 402 of 201 proximal end of transfer unit
It is connected between inner insulating layer, and with electrode 101.The quantity of conducting wire can be consistent with the quantity of electrode, can also be led by one
Line connects multiple electrodes.
The radio frequency ablation catheter cooperation guiding wire of the present embodiment uses, and specific work process is as follows:
(1) guiding wire is imported to the predetermined position in blood vessel；
(2) due to the presence of guiding wire, load bearing component 102 becomes the first shape by preformed second shape (spiral shape)
Shape (state stretched), convenient for moving in the blood vessel；Radio frequency ablation catheter is moved in blood vessel along guiding wire and is made a reservation for
Position；
(3) guiding wire being detached into load bearing component 102, load bearing component 102 becomes the second shape by first shape, at this point,
Electrode 101 on load bearing component 102 is close to blood vessel, adjusts energy by release and is treated；
(4) guiding wire is pushed into load bearing component 102, load bearing component 102 becomes first shape from the second shape again；
(5) radio frequency ablation catheter is removed into human body.
The guiding wire of the present embodiment is wire, is made of NiTi alloy.
Radio frequency ablation catheter cooperation guiding wire in the present embodiment uses.Central axis due to silk guide passage with entirely penetrate
The center overlapping of axles of frequency ablation catheter substantially overlap, and lead relative to common silk guide passage with catheter center axis out-of-alignment
The push resistance of pipe, guiding wire reduces.In addition, the internal layer due to silk guide passage is formed by high molecular material, internal cavities table
Face is smooth, and guiding wire is enable more swimmingly to move, and plays protective effect, will not wipe guiding wire surface off because of friction
Hydrophilic coating prevents potential health hazard.The outer layer of silk guide passage is also made of high molecular material, high molecular material tool
There is certain toughness, can effectively prevent fractureing for silk guide passage.
After the adjusting component of conduit is directed to setting position using guiding wire, if electrode and vascular wall fitting are bad,
It can be then adjusted by rotary guide pipe.Common radio frequency ablation catheter, due to silk guide passage be biasing, central shaft with
There are distances for the central axis of conduit, once so conduit rotation is more than 180 ° or more, guiding wire can be wrapped on conduit.And this
Radio frequency ablation catheter in embodiment, due to coaxial silk guide passage, it can according to need and be rotated at random, it will not
Cause guiding wire in supravasal winding.
On common catheter product, in order to deform load bearing component so that electrode and vascular wall fitting, need to guide
Seal wire is changing to for treatment when load bearing component is not supported by guiding wire from fast exchange mouth a part of dropping back
Two shapes.However, common radio frequency ablation catheter, it is excessive to be easy recession when guiding wire is dropped back.Once guiding wire recession is super
Fast exchange mouth is crossed, then can not penetrate guiding wire again, this leads to not the shape for adjusting load bearing component by guiding wire, holds
Mobile conduit when component the second shape of maintenance is carried, patient's blood vessel can be caused to damage.Catheter product in the present embodiment, due to not
There are fast exchange mouths, therefore, the shortcomings that seal wire may be detached to fast exchange mouth are also just not present.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of coaxial silk guide passage for radio frequency ablation catheter, which is characterized in that the silk guide passage disappears along the radio frequency
Melt the axial setting of conduit, the central axis of the silk guide passage and the central axis of the radio frequency ablation catheter substantially overlap.
2. being used for the coaxial silk guide passage of radio frequency ablation catheter as described in claim 1, which is characterized in that the silk guide passage
It consists of three layers:
Internal layer, the cavity that the internal layer is formed can accommodate guiding wire, and the internal layer is arranged to reduce and the guiding
The friction of seal wire；
Middle layer, the middle layer is located at the outside of the internal layer, and fits closely with the internal layer, and the middle layer is arranged to bond
The internal layer and outer layer of the silk guide passage；
Outer layer, the outer layer is located at the outside in the middle layer, and fits closely with the middle layer, and the outer layer is positioned to provide
Flexibility, adhesiveness and the workability of silk guide passage.
3. as claimed in claim 2 be used for radio frequency ablation catheter coaxial silk guide passage, which is characterized in that the cavity it is interior
Diameter is slightly larger than the diameter of the guiding wire.
4. as claimed in claim 3 be used for radio frequency ablation catheter coaxial silk guide passage, which is characterized in that the cavity it is interior
Diameter is 0.37~0.60mm.
5. being used for the coaxial silk guide passage of radio frequency ablation catheter as claimed in claim 2, which is characterized in that the internal layer is by height
Molecular material is formed；The high molecular material is HDPE, PTFE, FEP or PET.
6. being used for the coaxial silk guide passage of radio frequency ablation catheter as claimed in claim 2, which is characterized in that the middle layer is by height
Molecular adhesion material is formed, and the polymeric adhesion material is LLDPE, EVA or PE.
7. being used for the coaxial silk guide passage of radio frequency ablation catheter as claimed in claim 2, which is characterized in that the outer layer is by height
Molecular material is formed；The high molecular material is Pebax, TPU, Nylon or TPE.
8. a kind of radio frequency ablation catheter containing coaxial silk guide passage including the adjusting component for carrying out Physiological effect and is used for
The adjusting component is transported to the transfer unit of setting position；
The component that adjusts includes for will adjust energy transmission to the electrode of setting position and be used to carry holding for the electrode
Carry component；
The load bearing component has first shape and the second shape, and under the first shape, the adjusting component is suitable in blood
It is moved in pipe；Under second shape, at least one described electrode, which is in, to be suitble to set the adjusting energy transmission described in
Positioning is set；It is characterized in that,
The radio frequency ablation catheter is internally provided with silk guide passage, and the silk guide passage runs through the entire radio frequency ablation catheter,
And the central axis of the silk guide passage and the central axis of the radio frequency ablation catheter substantially overlap.
9. containing the radio frequency ablation catheter of coaxial silk guide passage as claimed in claim 8, which is characterized in that the silk guide passage
It consists of three layers:
Internal layer, the cavity that the internal layer is formed can accommodate guiding wire, and the internal layer is arranged to reduce and the guiding
The friction of seal wire；
Middle layer, the middle layer is located at the outside of the internal layer, and fits closely with the internal layer, and the middle layer is arranged to bond
The internal layer and outer layer of the silk guide passage；
Outer layer, the outer layer is located at the outside in the middle layer, and fits closely with the middle layer, and the outer layer is positioned to provide
Flexibility, adhesiveness and the workability of silk guide passage.
10. containing the radio frequency ablation catheter of coaxial silk guide passage as claimed in claim 9, which is characterized in that the radio frequency disappears
Melting conduit further includes support tube, inner insulating layer, external insulation layer and conducting wire:
The support tube is located at the outside of the silk guide passage；
The outside of the support tube is arranged in the inner insulating layer；
The outside of the inner insulating layer is arranged in the external insulation layer；
The conducting wire is arranged between the inner insulating layer and the external insulation layer, for providing the adjusting energy for the electrode
Temperature and impedance when amount and monitoring ablation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557578.0A CN109223170A (en) | 2017-07-10 | 2017-07-10 | Coaxial silk guide passage for radio frequency ablation catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710557578.0A CN109223170A (en) | 2017-07-10 | 2017-07-10 | Coaxial silk guide passage for radio frequency ablation catheter |
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| Publication Number | Publication Date |
|---|---|
| CN109223170A true CN109223170A (en) | 2019-01-18 |
Family
ID=65083639
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710557578.0A Pending CN109223170A (en) | 2017-07-10 | 2017-07-10 | Coaxial silk guide passage for radio frequency ablation catheter |
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| CN (1) | CN109223170A (en) |
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| CN205814415U (en) * | 2016-02-04 | 2016-12-21 | 上海安通医疗科技有限公司 | A kind of multi-electrode radio frequency ablation catheter for renal artery |
| CN208693433U (en) * | 2017-07-10 | 2019-04-05 | 上海安通医疗科技有限公司 | Coaxial silk guide passage for radio frequency ablation catheter |
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|---|---|---|---|---|
| US6165166A (en) * | 1997-04-25 | 2000-12-26 | Schneider (Usa) Inc. | Trilayer, extruded medical tubing and medical devices incorporating such tubing |
| JP2000024115A (en) * | 1998-07-10 | 2000-01-25 | Hitachi Cable Ltd | Inner layer ptfe composite catheter tube and its production |
| US7341571B1 (en) * | 2004-09-02 | 2008-03-11 | Advanced Cardiovascular Systems, Inc. | Balloon catheter having a multilayered distal tip |
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| US20150273203A1 (en) * | 2014-03-26 | 2015-10-01 | Terumo Kabushiki Kaisha | Medical tube, balloon catheter and method of manufacturing medical tube |
| CN205814415U (en) * | 2016-02-04 | 2016-12-21 | 上海安通医疗科技有限公司 | A kind of multi-electrode radio frequency ablation catheter for renal artery |
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