CN114711955A - Electric control ablation catheter for radial artery - Google Patents
Electric control ablation catheter for radial artery Download PDFInfo
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- CN114711955A CN114711955A CN202210506369.4A CN202210506369A CN114711955A CN 114711955 A CN114711955 A CN 114711955A CN 202210506369 A CN202210506369 A CN 202210506369A CN 114711955 A CN114711955 A CN 114711955A
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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
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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
- A61B2018/1465—Deformable electrodes
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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
- A61B2018/1467—Probes or electrodes therefor using more than two electrodes on a single probe
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Abstract
The invention discloses an electric control ablation catheter for a radial artery, which belongs to the technical field of medical devices and comprises a heating structure; the memory component is wound on the periphery of the heating structure and comprises a first state and a second state, the first state and the second state are mutually switched through deformation, and the catheter enters a radial artery blood vessel in the first state and is switched into the second state after entering the radial artery blood vessel; the heating structure is used for triggering the state switching of the memory component and generating corresponding deformation along with the deformation of the memory component. The memory component is arranged to switch the states, the blood vessel is accessed in the first state, the outer diameter of the catheter is reduced, the catheter provided by the invention can be accessed from the radial artery, and the steering capacity can be realized without using a guide wire when the memory component is arranged in the second state.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to an electric control ablation catheter for a radial artery.
Background
The radio frequency ablation is a minimally invasive tumor in-situ treatment technology, and the principle is as follows: high-frequency alternating current of the electrode is emitted into a focus tissue, ions in the focus tissue are changed along with the change of the current direction, the focus tissue generates high temperature, when the temperature exceeds a certain temperature (generally 60 ℃), the focus tissue dies, and finally tumor tissue is coagulated and inactivated. When Percutaneous Coronary Intervention (PCI) is used to manage patients with Acute Coronary Syndrome (ACS), the access options may often have a significant impact on the patient prognosis. Evidence shows that radial access can reduce the incidence of complications after treatment, and the wound is easy to treat.
At present, most of catheter structures adopted for radio frequency ablation are composed of an inner layer A, an outer layer catheter B, a middle skeleton layer C, a conducting wire layer D and an electrode layer E, and coaxial structures are adopted and respectively occupy one layer of space, as shown in fig. 1 and 2, the outer diameter of the catheter can be increased by the aid of the coaxial structures, the outer diameter is larger than the inner diameter of an opening of a radial artery, and access to the radial artery cannot be achieved.
For example, patent document CN114271929A discloses a self-control ablation catheter suitable for radial artery, in which a heating wire is wound on a deformation wire, and the deformation of the deformation wire is controlled by whether the heating wire is heated, so that the catheter can be transported with a smaller diameter to reach the purpose of radial artery access.
Disclosure of Invention
The invention aims to provide an electrically-controlled ablation catheter for a radial artery, which aims to solve the problem that the existing catheter structure for radio frequency ablation in the background art adopts a coaxial structure and occupies a layer of space respectively, so that the outer diameter of the catheter is increased, the outer diameter is larger than the inner diameter of an opening of the radial artery, and the radial artery access cannot be realized.
In order to achieve the purpose, the invention provides the following technical scheme: an electrically controlled ablation catheter usable with a radial artery, comprising:
a heat generating structure;
the memory component is wound on the periphery of the heating structure and comprises a first state and a second state, the first state and the second state are mutually switched through deformation, and the catheter enters a radial artery blood vessel in the first state and is switched into the second state after entering the radial artery blood vessel;
the heating structure is used for triggering the state switching of the memory component and generating corresponding deformation along with the deformation of the memory component.
Preferably, the memory component is wound and tightly attached to the heating structure to transfer heat.
Preferably, in the first state, the memory member is wound on the heat generating structure, and the memory member is wound to form coils, and the intervals between the coils are equal everywhere.
Preferably, after the heating structure is activated, the temperature of the heating structure is rapidly increased to a treatment temperature so as to trigger the memory component to be deformed from the first state to be switched to the second state.
Preferably, in the second state, the temperature of the memory component exceeds the deformation temperature, the memory component deforms to a preset shape, and the heating structure is driven to deform.
Preferably, in the second state, the distance between two adjacent coils on the memory member is greater on the outer side away from the coiling shape axis of the memory member than on the inner side close to the coiling shape axis, so that the outer side of the heating structure is exposed to release heat.
Preferably, in the second state, the memory member forms the predetermined shape by winding a coil around itself, and the predetermined shape is a spiral shape, that is, the coil extends along a spiral line, and a cross-sectional shape of the coil of the memory member includes a circular shape and a square shape.
Preferably, the treatment temperature is in the range of 60-100 ℃.
Preferably, the heating structure is a heating wire made of a high resistivity material for emitting heat for switching the shape of the memory member, and the material may be selected from tungsten, Ni — Cr alloy, Cr15Ni 60.
Preferably, the material of the memory component is a memory metal, including a nickel-titanium alloy.
Compared with the prior art, the invention has the beneficial effects that:
the memory component is arranged to switch states, the memory component enters a blood vessel in a first state, and the outer diameter of the catheter is reduced, so that the catheter provided by the invention can enter from a radial artery, and when the catheter enters the blood vessel, the memory component and the heating structure jointly form a gentle linear structure, so that the approach of the radial artery is smoothly realized, and complications of a radial artery path caused by multiple times of puncture, such as radial artery perforation, forearm hematoma, radial artery occlusion and the like, are avoided; memory component is predetermined spiral under the second state, and it is the heliciform to drive the heating structure deformation, the outside of heating structure is exothermic and is carried out the clinical treatment of hypertension, heating structure's the outside is exothermic and is inactivated the focus this moment, and it need not to use the guide wire to set up the second state, also possess and turn to the ability, simultaneously because only constitute by heating structure and memory component in this patent, the structure is simpler, can do littleer with the pipe diameter, make things convenient for radial artery to enter the road more, the heat of heating wire only can transmit to the outside in this patent simultaneously, heat transfer is more concentrated, the treatment effect has been promoted.
Drawings
FIG. 1 is a schematic cross-sectional view of the prior art;
FIG. 2 is a schematic distal end view of the prior art;
FIG. 3 is a schematic view of a first state structure of the present invention;
FIG. 4 is a front view of the overall large spiral structure (including the heat generating structure) of the present invention;
FIG. 5 is a front view of a large spiral configuration of the memory member of the present invention;
FIG. 6 is a perspective view of the large spiral structure of the memory member of the present invention;
FIG. 7 is a structural diagram of an embodiment of a memory member of the present invention;
FIG. 8 is a schematic structural diagram of a memory device according to a second embodiment of the present invention;
FIG. 9 is a schematic diagram of a memory device according to a third embodiment of the present invention.
In the figure: 1. a heat generating structure; 2. a memory member; 200. a first coil; 200a, an outer end I; 201. a second coil; 201a, an outer end II; 202. a third coil; 202a and an inner end III; 203. a fourth coil; 203a and an inner end four.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 3-6, which illustrate a technical solution of the present invention: an electrically controlled ablation catheter usable with a radial artery, comprising:
a heat generating structure 1;
the memory component 2 is wound on the periphery of the heating structure 1, the memory component 2 comprises a first state and a second state, the first state and the second state are mutually switched through deformation, and the catheter enters a radial artery blood vessel in the first state and is switched into the second state after entering the radial artery blood vessel;
the heating structure 1 is used for triggering the state switching of the memory component 2 and generating corresponding deformation along with the deformation of the memory component 2.
In the embodiment, the catheter can stably and smoothly enter a radial artery blood vessel through the first state, when the catheter reaches a focus, the heating structure 1 is heated, the temperature is transferred to the memory member 2, the memory member 2 reaches the deformation temperature, the memory member 2 is triggered to deform, the catheter enters the second state, the memory member 2 is in a preset spiral shape, the heating structure 1 is driven to deform in a spiral shape, at the moment, heat is released from the outer side of the heating structure 1 to inactivate the focus, and clinical treatment of hypertension is carried out.
The memory component 2 is arranged to switch the states, the blood vessel is accessed in the first state, the outer diameter of the catheter is reduced, the catheter provided by the invention can be accessed from the radial artery, and the steering capacity can be realized without using a guide wire in the second state.
A catheter in a first state may be referred to as a delivery state and a catheter in a second state may be referred to as a treatment state.
Specifically, the memory member 2 is wound and closely attached to the heat generating structure 1 to perform heat transfer.
In this embodiment, the heat generating structure 1 is closely attached to the memory member 2, and when the heat generating structure 1 is heated, the memory member 2 is also heated synchronously.
Specifically, in the first state, the memory member 2 is wound on the heat generating structure 1, and the memory member 2 is wound to form coils, with the intervals between the coils being equal everywhere.
In the embodiment, in the first state, the memory member 2 is coiled on the heating structure 1, and the two are in a gentle linear shape to enter the blood vessel, and when entering the blood vessel, the two form a gentle linear structure together to smoothly realize the approach of the radial artery, thereby avoiding complications of radial artery path caused by multiple punctures, such as radial artery perforation, forearm hematoma, radial artery occlusion, and the like.
The distance between two adjacent coils is the same, see fig. 3, that is, the heating structure 1 is horizontally placed, the memory member 2 is wound on the heating structure, the horizontal distance between the two coils at corresponding positions is the same at any height, and the coils are uniformly arranged.
Specifically, after the heating structure 1 is activated, the temperature thereof will rapidly increase to the treatment temperature, so as to trigger the memory member 2 to be transformed from the first state to the second state.
In this embodiment, after the heating structure 1 is powered on, the temperature will be rapidly raised to the treatment temperature, which is 60-100 ℃.
Specifically, in the second state, the temperature of the memory member 2 exceeds the deformation temperature, and the memory member deforms into a predetermined shape and drives the heat generating structure 1 to deform.
In this embodiment, the melting point of the memory member 2 is much higher than the treatment temperature, so the temperature of the heat-generating structure 1 will not burn out the memory member 2.
Specifically, in the second state, referring to fig. 6, in the second state, the memory member 2 is deformed into a large spiral shape as shown in the drawing, two adjacent coils are selected for description and are respectively denoted as a first coil 200 and a second coil 201, part of the surfaces of the first coil 200 and the second coil 201 are in direct contact with the inner wall of the blood vessel and are respectively denoted as a first outer end 200a and a second outer end 201a, it can be seen from the drawing that a certain distance exists between the first outer end 200a and the second outer end 201a, another group of adjacent coils in the drawing are further described and are respectively denoted as a third coil 202 and a fourth coil 203, part of the surfaces of the third coil 202 and the fourth coil 203 are opposite to the outer end surface, that is, the part is not in contact with the blood vessel wall, and are respectively denoted as a third inner end 202a and a fourth inner end 203a, it can be seen from the drawing that the third inner end 202a and the fourth end 203a are closely adjacent, that is, that there is no gap between the third end 202a and the inner end 203a and the fourth end 203a, that is, at this time, the adjacent coils form a sealed section with an outer opening, and it is known from the above description that the memory member 2 is wound around the heating mechanism, that is, the heating structure 1 is covered by the memory member 2, and at this time, with respect to the heating structure 1 located between the adjacent coils, the heating structure 1 is located in the above sealed section, the heat of the heating structure 1 can be radiated only through the opening position on the sealed section, that is, from the outer end of the coil, and at the same time, it is known from the above description that the outer end is a position in contact with the blood vessel wall, that is, the heat of the heating structure 1 is radiated unidirectionally to the blood vessel wall end, thereby achieving the purpose of treatment.
In the present embodiment, the heat is released from the outside of the heat generating structure 1 to perform clinical treatment of hypertension, and therefore, when in the second state, the coil outside pitch of the memory member 2 is larger than the coil inside pitch.
Specifically, in the second state, the memory member 2 forms a predetermined shape by winding the coil around itself, the predetermined shape is a spiral shape, that is, the coil extends along a spiral line, and the coil cross-sectional shape of the memory member 2 includes a circular shape and a square shape.
In this embodiment, after the heating structure 1 is heated to the treatment temperature, the temperature of the memory member 2 exceeds the deformation temperature, and the catheter is in the treatment state, as shown in fig. 5-6, the memory member 2 deforms to the predetermined spiral shape, and in the process, the heating structure 1 is driven to bend to the spiral shape.
Three embodiments of coil shapes formed by winding the memory member 2 are also provided with reference to fig. 7-9.
Referring to fig. 7, a first embodiment of the memory component 2 according to the present invention is shown, referring to fig. 8, a second embodiment of the memory component 2 according to the present invention is shown, and referring to fig. 9, a third embodiment of the memory component 2 according to the present invention is shown.
Specifically, the treatment temperature is in the range of 60-100 ℃.
In this embodiment, the heating structure 1 is heated to the treatment temperature, the memory member 2 can be switched and deformed and the lesion can be inactivated in the process, and the deformation temperature of the memory member 2 is above 40 ℃, so that the memory member 2 is not deformed by the internal temperature of the blood vessel of the human body.
Specifically, the heating structure 1 is a heating wire made of a high resistivity material for heat dissipation to switch the shape of the memory member 2, and the material may be selected from tungsten, Ni — Cr alloy, and Cr15Ni 60.
In this embodiment, the heating wire is made of tungsten, Ni-Cr alloy, Cr15Ni60, or the like.
Specifically, the material of the memory member 2 is a memory metal, including a nickel-titanium alloy.
In the present embodiment, the memory member 2 is a memory metal and can change into a predetermined shape when the temperature changes.
The working principle and the using process of the invention are as follows: the catheter can stably and smoothly enter a blood vessel through the first state, the memory component 2 is coiled on the heating structure 1 and is in a smooth linear shape so as to enter the blood vessel, when the heating structure 1 reaches a focus, the temperature can be rapidly increased to the treatment temperature after the heating structure 1 is powered on, the treatment temperature is 60-100 ℃, the temperature is transferred to the memory component 2, the memory component 2 reaches the deformation temperature, the memory component 2 is triggered to deform and enters the second state, the memory component 2 is in a preset spiral shape and drives the heating structure 1 to deform into a spiral shape, heat is released from the outer side of the heating structure 1 to carry out clinical treatment on hypertension, at the moment, heat released from the outer side of the heating structure 1 is used for inactivating the focus, and clinical treatment on the hypertension is carried out.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An electrically controlled ablation catheter usable with a radial artery, comprising: the method comprises the following steps:
a heat generating structure (1);
the memory component (2) is wound on the periphery of the heating structure (1), the memory component (2) comprises a first state and a second state, the first state and the second state are mutually switched through deformation, and the catheter enters a radial artery blood vessel in the first state and is switched into the second state after entering the radial artery blood vessel;
the heating structure (1) is used for triggering the state switching of the memory component (2) and generating corresponding deformation along with the deformation of the memory component (2).
2. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 1, wherein: the memory component (2) is tightly wound on the heating structure (1) to carry out heat transfer.
3. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 1, wherein: in the first state, the memory member (2) is wound on the heat generating structure (1), and the memory member (2) is wound to form coils, the intervals between the coils being equal everywhere.
4. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 1, wherein: after the heating structure (1) is started, the temperature of the heating structure can be rapidly increased to a treatment temperature so as to trigger the memory component (2) to be deformed from the first state to be switched to the second state.
5. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 4, wherein: in the second state, the temperature of the memory component (2) exceeds the deformation temperature, the memory component deforms to a preset shape, and the heating structure (1) is driven to deform.
6. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 5, wherein: in the second state, the distance between two adjacent coils on the memory component (2) is larger at the outer side far away from the coiling shape axis of the memory component (2) than at the inner side near the axis, so that the outer side of the heating structure (1) is exposed to release heat.
7. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 5, wherein: the memory component (2) is in the second state, a coil wound by the memory component forms the preset shape, the preset shape is a spiral shape, namely the coil extends along a spiral line, and the coil section shape of the memory component (2) comprises a circle and a square.
8. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 4, wherein: the treatment temperature is in the range of 60-100 ℃.
9. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 1, wherein: the heating structure (1) is a heating wire, is made of high-resistivity materials, releases heat, is used for switching the form of the memory component (2), and can be made of tungsten, Ni-Cr alloy and Cr15Ni 60.
10. An electrically controlled ablation catheter for use in a radial artery as claimed in claim 1, wherein: the material of the memory component (2) is memory metal, including nickel-titanium alloy.
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| CN202210506369.4A CN114711955B (en) | 2022-05-11 | 2022-05-11 | Electric control ablation catheter for radial artery |
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| CN202210506369.4A CN114711955B (en) | 2022-05-11 | 2022-05-11 | Electric control ablation catheter for radial artery |
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| CN106852703A (en) * | 2015-12-08 | 2017-06-16 | 上海安通医疗科技有限公司 | A kind of radio frequency ablation catheter for renal artery |
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| CN113693717A (en) * | 2021-08-30 | 2021-11-26 | 上海安通医疗科技有限公司 | Radio frequency ablation catheter for radial artery access |
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