CN108066003A - Ablation catheter - Google Patents
Ablation catheter Download PDFInfo
- Publication number
- CN108066003A CN108066003A CN201711478889.4A CN201711478889A CN108066003A CN 108066003 A CN108066003 A CN 108066003A CN 201711478889 A CN201711478889 A CN 201711478889A CN 108066003 A CN108066003 A CN 108066003A
- Authority
- CN
- China
- Prior art keywords
- ablation catheter
- guide head
- catheter according
- conduit
- push
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart 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
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00345—Vascular system
-
- 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
- A61B2018/00595—Cauterization
-
- 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
- A61B2018/0091—Handpieces of the surgical instrument or device
Abstract
The present invention provides a kind of ablation catheter, and including push conduit, arranged on the excitation handle of push rear end of conduit and arranged on supravasal heating element is pushed, the front end of the push conduit is equipped with the guide head with guide function.Ablation catheter of the present invention is due to being provided with the guide head with guide function, therefore by the guiding role of guide head can be very well the ablation catheter is stretched into operative site, guidewire lumen need not be reserved on ablation catheter, so as to which the outer diameter for pushing conduit can be designed smaller, avoid the wound for increasing patient, and due to the guiding role of guide head, simpler convenience is operated, shortens operating time.
Description
Technical field
The present invention relates to the field of medical instrument technology more particularly to a kind of ablation catheters.
Background technology
Varication refers to since vein caused by the factors such as the blood stasis of blood is stagnant, vein tube wall weakness is tortuous, expansion, is a kind of
Common venous disease, is usually happened in Superficial veins, and wherein great saphenous vein and lower small saphenous vein is in the majority, disease during symptom occurs
Become position protrusion, unsightly, when serious have feeling of pain or even initiation diseased region festers and a variety of severe complications.
Traditional vein radiofrequency ablation instrument, since ablation head end is longer, caliber is relatively thick, it is necessary to which reserved seal wire guides
It is treated after to targeting moiety, and is used only for the intraluminal ablation of above-knee great saphenous vein, branch at one's knees can not be handled, and grasped
Make relatively cumbersome, patient spend it is higher.Also, ablation catheter needs reserved guidewire lumen in itself, generally requires compatible 0.025 " and leads
Silk.Cause whole caliber relatively thick, it is necessary to perform the operation using larger catheter sheath, increase the wound of patient.
The content of the invention
The purpose of the present invention is to solve the above problems, provide a kind of ablation catheter, set leading with guide function
To head, guidewire lumen need not be reserved, can be designed smaller so as to the outer diameter of conduit, be more prone to operate, and avoids adding
The wound of big patient.
In order to achieve the above object, the present invention provides a kind of ablation catheter, including push conduit, arranged on push rear end of conduit
Excitation handle and arranged on supravasal heating element is pushed, the front end of the push conduit is equipped with leading with guide function
To head.
In one embodiment of the invention, the guide head is gradually reduced for the cylinder or outer diameter of external diameter constant towards front end
Cone.
In one embodiment of the invention, the guide head front end has the spherical guide surface of semicircle.
In one embodiment of the invention, the guide head is using solid construction made of flexible material or by wire
The hollow-core construction for the inner hollow being entwined.
In one embodiment of the invention, the flexible material is using resin material or rubber material or resin material and rubber
The composite material of material.
In one embodiment of the invention, the guiding head surface is covered with hydrophilic coating.
In one embodiment of the invention, the push conduit is the pipe of external diameter constant or the cone being gradually reduced towards front end
Shape pipe.
In one embodiment of the invention, the heating element includes being sheathed on the supravasal wire coil of push.
In one embodiment of the invention, the length of the heating element is less than or equal to 5cm.
In one embodiment of the invention, further include connection guide head and handle is excited to guide silk into, with by exciting handle
Control the direction of advance of guide head.
Compared with prior art, the advantageous effect of the technical program is：
Ablation catheter of the present invention passes through the guiding role of guide head due to being provided with the guide head with guide function
Can the ablation catheter be stretched into operative site very wellly, guidewire lumen need not be reserved on ablation catheter, so as to push away
Sending the outer diameter of conduit can be designed smaller, avoid the wound for increasing patient, and due to the guiding role of guide head, behaviour
Make simpler convenience, shorten operating time.
Description of the drawings
Fig. 1 is the structure diagram of an embodiment of ablation catheter of the present invention；
Fig. 2 is the schematic diagram that ablation catheter of the present invention enters normal blood vessels by catheter sheath；
Fig. 3 is the schematic diagram that ablation catheter of the present invention enters curved blood vessel by catheter sheath；
Fig. 4 is the structure diagram of the embodiment one of the guide head of ablation catheter of the present invention；
Fig. 5 is the structure diagram of the embodiment two of the guide head of ablation catheter of the present invention；
Fig. 6 is the structure diagram of the embodiment three of the guide head of ablation catheter of the present invention；
Fig. 7 is the structure diagram of the example IV of the guide head of ablation catheter of the present invention；
Fig. 8 is the structure diagram of the embodiment five of the guide head of ablation catheter of the present invention；
Fig. 9 is the structure diagram of the embodiment six of the guide head of ablation catheter of the present invention；
Figure 10 is the structure diagram of an embodiment of the push conduit of ablation catheter of the present invention；
Figure 11 is the structure diagram of another embodiment of the push conduit of ablation catheter of the present invention；
Figure 12 is the structure diagram of an embodiment of the heating element of ablation catheter of the present invention；
Figure 13-14 is the schematic diagram that ablation catheter of the present invention is used cooperatively with ultrasonic probe；
Figure 15 is the structure diagram of another embodiment of ablation catheter of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, by specific embodiment, clear, complete description is carried out to technical scheme.
It please refers to Fig.1 shown in -3, the present invention provides a kind of ablation catheter, including push conduit 3, after push conduit 3
The excitation handle 4 at end and the heating element 2 on push conduit 3, the front end of the push conduit 3, which is equipped with to have, is oriented to work(
The guide head 1 of energy.During using ablation catheter of the present invention progress varicose treatment ablation or the ablation at other positions, due to
There is provided the guide head 1 with guide function, thus by the guiding role of guide head 1 can be very well the ablation is led
Pipe stretches to operative site, and guidewire lumen need not be reserved on ablation catheter, so as to which the outer diameter for pushing conduit 3 can be designed to compare
It is smaller, the wound for increasing patient is avoided, and due to the guiding role of guide head 1, operates simpler convenience, shortens hand
The art time.
" front end " refers to stretching into the one end advanced during blood vessel, and the other end is then " rear end ", technical term " front end " " after
Hold " merely to more fully understand the present invention, not provide constraints to the present invention.
It in one embodiment, please refers to Fig.4 shown in -6, the guide head 1 is the cone that outer diameter is gradually reduced towards front end.
Cone has good guiding role, and can making guide head 1, smoothly guiding push conduit 3 advances.But not limited to this, another
It in embodiment, refer to shown in Fig. 7-9, the guide head 1 is the cylinder of external diameter constant, can equally play guiding role.
Further, please refer to Fig.4 with shown in Fig. 7,1 front end of guide head has the spherical guide surface 11 of semicircle, this is led
To face 11 there is the circular curve seamlessly transitted, preferable guiding role can be played, and avoid 1 front end of guide head sharp and pierce
Blood trouble pipe.It refer to shown in figure, be that 1 front end of guide head of cone shape has the spherical guide surface 11 of semicircle, cone can be avoided
Stab blood vessel in the front end of the guide head 1 of shape；It refer to shown in figure, have that semicircle is spherical leads for 1 front end of guide head of cylindrical shape
To face 11 so that the guide head 1 of cylindrical shape has better guiding role.
In one embodiment, please refer to Fig.4 with shown in Fig. 7, the guide head 1 is using solid knot made of flexible material
Structure, the characteristic of flexible material in itself have preferable compliance, which the taper of solid construction is made of flexible material
Body or cylinder can obtain better guiding role, be not in the situation that blood vessel is punctured.
The flexible material is using resin material or rubber material or the composite material of resin material and rubber material.Resin
Material can select polyolefin such as polyethylene, polypropylene, polyvinyl chloride, polyester (PET, PBT etc.), polyamide, polyimides, poly-
It is one or more in urethane, polystyrene, makrolon, organic siliconresin and fluorine resin (PTFE, ETFE, PFA etc.)
Composite material.Rubber material can select the various rubber materials such as latex rubber, silicone rubber.It can also be more than being combined with
Two or more composite materials in resin material and rubber material, the invention is not limited in this regard.In these materials especially
The preferred polyurethane based resin in ground.In the case where guide head 1 is made using polyurethane based resin, the flexibility of guide head 1 is into one
Step improves, thus to blood vessel when insertions when, guidance quality is more preferable, moreover it is possible to prevent injured blood vessel inner wall, safety
Property is high.
In another embodiment, refer to shown in Fig. 5 and Fig. 8, the guide head 1 is the inside being entwined by wire
Hollow hollow-core construction.The hollow structure being wound by wire is a kind of flexible structure with certain elasticity, this is led
The cone or cylinder of hollow-core construction are wound in using wire to first 1, good guiding role can be also obtained, be not in
The situation that blood vessel is punctured.It is various that stainless steel, piano wire, cobalt alloy, the pseudoelasticity alloy of SUS classifications etc. can be used in wire
Metal material, the invention is not limited in this regard.The particularly preferred stainless steel material in these materials.In guide head 1 by stainless steel
In the case of made of material, there is excellent guidance quality and push-in property.
Further, refer to shown in Fig. 6 and Fig. 9,1 surface of guide head is covered with hydrophilic coating 12.It sets hydrophilic
Coating 12 can reduce skin-friction force, improve puncture and the guidance capability of guide head 1.Polyurethane can be used in the hydrophilic coating 12
High molecular polymers or the monomer materials such as urea, polyacrylic acid, polyacrylamide, POLYPROPYLENE GLYCOL, polyacrylic acid-acrylamide, this
Invention is not restricted this.
It in one embodiment, please refers to Fig.1 shown in 0, the push conduit 3 is the pipe of external diameter constant, in another embodiment
In, it please refers to Fig.1 shown in 1, the push conduit 3 is the conical pipe that outer diameter is gradually reduced towards front end.Pipe and conical pipe are equal
Easily in push-in blood vessel, conical pipe has certain guidance quality, it is easier to be pushed into blood vessel since outer diameter is gradually reduced towards front end
In.
Since guide head 1 has guiding role, push conduit 3 need not reserve guidewire lumen, therefore push conduit 3
Outer diameter can be designed smaller.In one embodiment, the outer diameter (constant outer diameter or taper of pipe of the push conduit 3
The maximum outside diameter of pipe) it is less than or equal to 6Fr (1Fr=0.33mm), size is smaller, can reduce the injury to wound.
The push conduit 3 can be used various polymeric materials and be made, to meet push conduit 3 specific low friction in blood
Coefficient is easy to the function of being oriented to and transmit.Its material is not specially limited, and can be used：The polyolefin such as polyethylene, polypropylene gather
Vinyl chloride, polyester (PET, PBT etc.), polyamide, polyimides, polyurethane, polystyrene, makrolon, organic siliconresin or
Either the composite material of these materials or latex rubber, silicone rubber etc. are various for fluorine resin (PTFE, ETFE, PFA etc.)
Rubber material or the two or more composite materials being combined in more than material.
It in one embodiment, please refers to Fig.1 shown in 2, the heating element 2 includes the metal wire being sheathed on push conduit 3
Circle 21.It is heated by electrical energy drive, existing ultrasonic probe 8 is coordinated to be used together, as shown in Figure 13,14, ultrasonic probe 8
Be covered on heating element 2, heating element 2 pressed by ultrasonic probe, make blood vessel 9 heated so as to 9 lesion of blood vessel into
Row ablation.In one embodiment, the length of the heating element 2 is less than or equal to 5cm, and existing ultrasonic probe 8 can be complete
Cover entire heating element 2 so that the blood vessel 9 of lesion is effectively bonded, and so as to be heated evenly, reaches preferable ablation effect, is dropped
The low probability of postoperative recurrence.The wire coil 21 can be in the shape of a spiral entwined by an one metal wire, alternatively, the gold
Belonging to coil 21 includes several beckets for being sheathed on 3 outside of push conduit side by side.Wire coil 21 can be used stainless steel, copper,
Alloy between the metal materials such as nichrome, titanium or these metal materials or the like is made, and the present invention is to wire coil 21
Material be not restricted.
It in one embodiment, please refers to Fig.1 shown in 5, the ablation catheter further includes connection guide head 1 and excites handle 4
Silk 41 is guided into, with by the way that handle 4 is excited to control the direction of advance of guide head 1.This, which is guided silk 41 into and is passed through from 3 inside of push conduit, connects
Connect guide head 1 and excitation handle 4.This is set, which to guide silk 41 into, to be oriented to by exciting push-and-pull and/or the rotation of handle 4 to control
First 1 direction of advance, so as to play the purpose of arbitrary choice direction.Stainless steel wire can be used in the silk 41 of guiding into, and the present invention is right
This is not restricted.
The ablation catheter further includes the extension cable 5 for connecting the excitation handle 4, which is used for and radio frequency
Equipment is attached, to carry out radio-frequency ablation procedure.
Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair
Bright technical solution makes possible variation and modification, therefore, every content without departing from technical solution of the present invention, according to the present invention
Any simple modifications, equivalents, and modifications made to above example of technical spirit, belong to technical solution of the present invention
Protection domain.
Claims (10)
1. a kind of ablation catheter, which is characterized in that including push conduit, arranged on push rear end of conduit excitation handle and be arranged on
Supravasal heating element is pushed, the front end of the push conduit is equipped with the guide head with guide function.
2. ablation catheter according to claim 1, which is characterized in that the guide head is the cylinder or outer of external diameter constant
The cone that footpath is gradually reduced towards front end.
3. ablation catheter according to claim 2, which is characterized in that the guide head front end has the spherical guiding of semicircle
Face.
4. ablation catheter according to claim 2, which is characterized in that the guide head is using real made of flexible material
The hollow-core construction of core structure or the inner hollow being entwined by wire.
5. ablation catheter according to claim 4, which is characterized in that the flexible material uses resin material or rubber material
Material or the composite material of resin material and rubber material.
6. ablation catheter according to claim 4, which is characterized in that the guiding head surface is covered with hydrophilic coating.
7. ablation catheter according to claim 1, which is characterized in that pipe or court of the push conduit for external diameter constant
The conical pipe that forward end is gradually reduced.
8. ablation catheter according to claim 1, which is characterized in that the heating element includes being sheathed on push conduit
Wire coil.
9. ablation catheter according to claim 1, which is characterized in that the length of the heating element is less than or equal to 5cm.
10. ablation catheter according to claim 1, which is characterized in that further include connection guide head and excite drawing for handle
To silk, with by the way that handle is excited to control the direction of advance of guide head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711478889.4A CN108066003A (en) | 2017-12-29 | 2017-12-29 | Ablation catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711478889.4A CN108066003A (en) | 2017-12-29 | 2017-12-29 | Ablation catheter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108066003A true CN108066003A (en) | 2018-05-25 |
Family
ID=62156428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711478889.4A Pending CN108066003A (en) | 2017-12-29 | 2017-12-29 | Ablation catheter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108066003A (en) |
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Application publication date: 20180525 |