CN114224473B - Radio frequency ablation catheter with function of identifying vascular wall - Google Patents
Radio frequency ablation catheter with function of identifying vascular wall Download PDFInfo
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- CN114224473B CN114224473B CN202111490349.4A CN202111490349A CN114224473B CN 114224473 B CN114224473 B CN 114224473B CN 202111490349 A CN202111490349 A CN 202111490349A CN 114224473 B CN114224473 B CN 114224473B
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1076—Measuring physical dimensions, e.g. size of the entire body or parts thereof for measuring dimensions inside body cavities, e.g. using catheters
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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
- A61B2018/00315—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
- A61B2018/00404—Blood vessels other than those in or around the heart
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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
- A61B2018/00577—Ablation
Abstract
The invention discloses a radio frequency ablation catheter with a function of identifying vascular walls, which belongs to the technical field of ablation catheters and comprises a catheter; the blood vessel measuring device is arranged inside the catheter and is used for measuring the diameter of the blood vessel; the outer wall of the end part of the pushing pipe is provided with a blood vessel measuring device, and the pushing pipe is sleeved in the catheter and used for driving the blood vessel measuring device to push out or retract the catheter; the pushing switch comprises a pushing sliding block, the pushing sliding block is slidably mounted outside the fixed sleeve rod, and the pushing sliding block is connected with the end part of the pushing pipe through the fixed sleeve rod. The blood vessel measuring device is contracted around the push pipe, the push sliding block is moved, the push pipe is enabled to be sent out of the catheter, the blood vessel measuring device is sent out, the blood vessel measuring device can be automatically opened to measure the inner diameter of the blood vessel, and the mesh structure of the blood vessel measuring device can measure the inner diameters of the blood vessels at different positions.
Description
Technical Field
The invention belongs to the technical field of ablation catheters, and particularly relates to a radio frequency ablation catheter with a function of identifying vascular walls.
Background
Varicose veins are the most common diseases of the venous system, and compared with the traditional sclerosing agent injection and operation stripping, the radio frequency ablation catheter has better effect of treating varicose veins and lower recurrence rate. However, the main complications include burns to other adjacent tissues or organs during the ablation process, and the grasping of the ablation time is complicated and highly dependent on the operation ability of the operator due to the high ablation temperature during the operation. Therefore, people are constantly exploring the accuracy for reaching the lesion site by the heating coil at the distal end of the catheter, which is less dependent on the skill of the operator and is safer and more effective.
Existing vein ablation catheter in market is when clinical use, melts the catheter and gets into the human back, and the art person is through the position of the external observation pathological change blood vessel of ultrasonic image then the position that reaches pathological change blood vessel of manual operation catheter distal end heating coil, and this kind can't pinpoint and cover the blood vessel of pathological change through the mode of observing, probably can't melt the blood vessel of closed pathological change completely in the art, can heat the burn to normal blood vessel even, can cause the operation failure and cause very big misery for the patient when serious.
A pulsed electric field ablation catheter for intravascular ablation, as proposed in CN113349920A, comprises a tube body, an electrode assembly disposed at the end of the tube body, and an electrode connector disposed at the tail of the tube body; the electrode connector is connected to the electrode assembly through a lead wire disposed in the tube body. The pulse electric field ablation catheter for intravascular ablation can be guided into a target blood vessel of a heart through the cooperation of the guide channel and the guide assembly, carries out mapping in the target blood vessel and releases a high-energy pulse electric field capable of specifically damaging myocardial tissues, achieves the technical effect of treating the myocardial on the epicardial side near the blood vessel on the premise of not damaging the artery and vein blood vessels where the catheter is located, enlarges the approach of treating arrhythmia, and improves the safety and efficiency of the operation. However, the lesion site is often observed in vitro during detection, and the blood vessel inner diameter measuring device is difficult to smoothly contact with the blood vessel and is easy to scratch the blood vessel.
Disclosure of Invention
The invention aims to provide a radio frequency ablation catheter with a function of identifying a blood vessel wall, and aims to solve the problems that in the use process of the existing radio frequency ablation catheter, ultrasonic images are used for observing the position of a diseased blood vessel in vitro, then a heating coil at the far end of the catheter is manually operated to reach the position of the diseased blood vessel, the diseased blood vessel cannot be accurately positioned and covered, and the diseased blood vessel cannot be completely ablated and closed in an operation.
In order to achieve the purpose, the invention provides the following technical scheme: a radio frequency ablation catheter with vessel wall identification, comprising:
a conduit;
the blood vessel measuring device is arranged inside the catheter and is used for measuring the diameter of the blood vessel;
the outer wall of the end part of the pushing pipe is provided with a blood vessel measuring device, and the pushing pipe is sleeved in the catheter and used for driving the blood vessel measuring device to push out or retract the catheter;
the push switch comprises a push sliding block, the push sliding block is arranged outside the fixed sleeve rod in a sliding mode, the push sliding block is connected with the end portion of the push pipe through the fixed sleeve rod and drives the push pipe to move through pushing, and the blood vessel measuring device is further made to be sent out of the guide pipe.
Preferably, the bottom of the fixed loop bar is provided with a housing, and the bottom of the housing is in threaded connection with an elastic part protective sleeve.
Preferably, the elastic piece is arranged in the elastic piece protective sleeve, and the bottoms of the elastic piece and the elastic piece protective sleeve are connected with the supporting block together.
Preferably, the blood vessel measuring device is formed by winding a memory nickel-titanium alloy wire and has an umbrella-shaped or rectangular reticular structure.
Preferably, a heating coil is wound on the outer portion of the catheter, a stress diffusion tube is arranged on the outer portion, away from the blood vessel measuring device, of the catheter, and a positioning ring is arranged at one end of the stress diffusion tube.
Preferably, the other end of the stress diffusion tube is provided with a handle, one end of the handle, which is far away from the catheter, is provided with a connecting cable, and the connecting cable is connected with a connector.
Preferably, a power switch is arranged on the handle, and the push switch is further arranged on the handle.
Preferably, one end of the handle close to the connecting cable is provided with a tail wire fixing clip for fixing the catheter inside the handle.
Preferably, the end of the pushing tube is connected with a glue head for passing through the vessel wall.
Preferably, the material of the pushing pipe is polyether block polyamide.
Compared with the prior art, the invention has the beneficial effects that:
1. the push sliding block is moved by contracting the blood vessel measuring device around the push pipe to enable the push sliding block to extrude the elastic part protective sleeve, so that the push pipe can send out the catheter, the blood vessel measuring device is further sent out, when the catheter enters a human blood vessel, the push pipe is pushed out, the blood vessel measuring device can be automatically opened to measure the inner diameter of the blood vessel, and the mesh structure of the blood vessel measuring device can measure the inner diameters of the blood vessels at different positions.
2. The blood vessel measuring device is formed by winding a memory nickel-titanium alloy wire, is umbrella-shaped or rectangular, is smoothly contacted with the blood vessel wall, and has good plasticity and elasticity.
3. The propelling movement pipe head end is gluey the head, glues the head material and is le tai 3311, and the advantage of this material is whole softer, and is more smooth through human vascular wall, can not fish tail blood vessel skin, and the elastic component in the propelling movement switch is double-deck alloy memory spring, and its elasticity, toughness and anti laxity performance are good.
4. The heating coil is made of nickel-iron alloy, can be heated to the temperature (120 ℃) required by the operation in a short time, is not easy to deform and change the structure, and can be effectively insulated by wrapping a polyimide insulating coating on the outer layer.
5. The positioning ring, the stress diffusion tube and the power supply key are all made of medical silica gel, and have good thermal stability, heat insulation and insulativity.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the handle of the present invention;
FIG. 3 is a schematic diagram of a push switch according to the present invention;
FIG. 4 is a schematic diagram of the internal structure of the push switch of the present invention;
FIG. 5 is a schematic view of the structure of the elastic member of the present invention;
FIG. 6 is a schematic view of the structure of the blood vessel measuring device of the present invention;
FIG. 7 is a schematic structural diagram of another embodiment of the blood vessel measuring device of the present invention;
fig. 8 is a flow chart of the use of the present invention.
In the figure: 101. a conduit; 102. a heating coil; 103. a positioning ring; 104. a stress diffusion tube; 105. a power switch; 106. a handle; 107. connecting a cable; 108. a connector; 109. a push switch; 110. a vascular measurement device; 201. pushing the pipe; 202. a tail line fixing clip; 301. pushing the sliding block; 302. fixing the loop bar; 303. a support block; 304. an elastic member protective sleeve; 305. an elastic member; 3051. a first spring ring; 3052. a spring ring II; 306. a housing; 401. and (6) gluing a head.
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-8, the present invention provides a technical solution: a radio frequency ablation catheter with vessel wall identification, comprising:
a catheter 101;
a blood vessel measuring device 110 arranged inside the catheter 101 for measuring the diameter of the blood vessel;
the outer wall of the end part of the pushing pipe 201 is provided with the blood vessel measuring device 110, and the pushing pipe 201 is sleeved inside the catheter 101 and used for driving the blood vessel measuring device 110 to push out or retract the catheter 101;
push switch 109, including propelling movement slider 301, propelling movement slider 301 slidable mounting fixes the outside of loop bar 302, and propelling movement slider 301 passes through the tip of fixed loop bar 302 connection propelling movement pipe 201 to through propelling movement slider 301, in order to drive propelling movement pipe 201 and remove, further make vascular measurement device 110 send out pipe 101.
In this embodiment, the blood vessel measuring device 110 is contracted around the push tube 201, the push slider 301 is moved, the push slider 301 presses the elastic member protection sleeve 304, the push tube 201 is pushed out of the catheter 101, the blood vessel measuring device 110 is further pushed out, and when the catheter 101 enters a blood vessel of a human body, the push tube 201 is pushed out, and the blood vessel measuring device 110 automatically opens to measure the inner diameter of the blood vessel.
The catheter 101 is used for accessing a blood vessel of a human body, and a signal sensor can be arranged on the catheter 101 to transmit acquired inspection information to the radio frequency ablation instrument.
Specifically, the bottom of the fixed sleeve 302 is provided with a cover 306, and the bottom of the cover 306 is screwed with an elastic member protection sleeve 304.
In this embodiment, the upper portion of the elastic member 305 is provided with a housing 306, which is in threaded connection with the elastic member protection sleeve 304, the elastic member 305 is a double-layer alloy memory spring, which includes a first spring ring 3051 and a second spring ring 3052, and has good elasticity, toughness and anti-relaxation performance.
The pushing slide block 301 is moved to enable the pushing slide block 301 to press the elastic member protection sleeve 304 to send out the blood vessel measuring device 110, the pushing slide block 301 is released, and the pushing slide block 301 is reset through the elastic member 305.
Specifically, the elastic member 305 is disposed inside the elastic member protection sleeve 304, and the bottom of the elastic member 305 and the bottom of the elastic member protection sleeve 304 are commonly connected with the supporting block 303.
In this embodiment, the pad 303 is bonded inside the handle 106 using 4011 instant glue.
Specifically, the blood vessel measuring device 110 is formed by winding a memory nitinol wire, and has an umbrella-shaped or rectangular mesh structure.
In this embodiment, the blood vessel measuring device 110 is contracted around the push tube 201, when the catheter 101 enters the blood vessel of the human body, the push tube 201 is pushed out, the blood vessel measuring device 110 can automatically open and measure the inner diameter of the blood vessel, and the blood vessel measuring device 110 is formed by winding a memory nickel-titanium alloy wire, is umbrella-shaped or rectangular, is smoothly contacted with the blood vessel wall, and has good plasticity and elasticity.
Referring to fig. 6, as one embodiment of the blood vessel measuring device 110, the blood vessel measuring device 110 is distributed in an umbrella shape, and the outer edge thereof is smoothly curved and smoothly contacts with the blood vessel.
As another embodiment of the blood vessel measuring device 110, referring to fig. 7, the middle portion of the blood vessel measuring device 110 has a rectangular shape, and both ends are constricted.
Specifically, a heating coil 102 is wound on the exterior of the catheter 101, a stress diffusion tube 104 is arranged on the exterior of the catheter 101 away from the blood vessel measuring device 110, and a positioning ring 103 is arranged at one end of the stress diffusion tube 104.
In this embodiment, the positioning ring 103, the stress diffusion tube 104, and the power switch 105 are made of medical silica gel, and have good thermal stability, thermal insulation, and insulation properties.
A heat-generating coil 203 at the distal end of catheter 101 is positioned with vascular measurement device 110, the distal end being the end of catheter 101 intended to enter the blood vessel, the end remote from handle 106.
The heating coil 102 is made of nickel-iron alloy, can be heated to 120 ℃ required by the operation in a short time, is not easy to deform and change the structure, and can be effectively insulated by wrapping a polyimide insulating coating on the outer layer.
Specifically, the other end of the stress diffusion tube 104 is provided with a handle 106, and one end of the handle 106 away from the catheter 101 is provided with a connection cable 107, and is connected with a connector 108 through the connection cable 107.
In this embodiment, the connection cable 107 is connected to the connector 108 to supply power to the device.
Specifically, a power switch 105 is provided on the handle 106, and a push switch 109 is also provided on the handle 106.
In this embodiment, the handle 106 is used for holding the device, the power switch 105 is provided on the handle 106, and the device is started through the power switch 105.
Specifically, a tail fixing clip 202 is provided at an end of the handle 106 near the connection cable 107 for fixing the catheter 101 inside the handle 106.
In this embodiment, the connection cable 107 is fixed inside the handle 106 by a tail fixing clip 202.
Specifically, the end of the push tube 201 is connected to a glue head 401 for passing through the vessel wall.
In this embodiment, the rubber head 401 is made of loctite 3311, which has the advantages of being soft and smooth through the wall of the blood vessel, and not scratching the skin of the blood vessel.
Specifically, the material of the push pipe 201 is polyether block polyamide.
In this embodiment, the push tube 201 is made of Pebax polyether block polyamide, and has light weight, excellent thermal stability, and strong deformation resistance.
The working principle and the using process of the invention are as follows: the heating coil 102 position that the setting is located the pipe 101 distal end has vascular measuring device 110, vascular measuring device 110's network structure can measure the internal diameter of the blood vessel of different positions, in the operation process, pipe 101 gets into the vein blood vessel through opening the hole at human low limbs, vascular measuring device 110 can stretch out through installing push switch 109 on pipe 101 handle 106, detect the internal diameter of blood vessel, and transmit the detection numerical value for the radio frequency generator through signal sensor, show in real time on the radio frequency generator, when vascular measuring device 110 detects that the internal diameter of blood vessel appears unusually, when discerning for varicose vein, the radio frequency generator receives unusual signal after, unusual signal appears on the display screen, the person of doing this moment can find out pathological change position smoothly, melt, guarantee the accuracy of operation position.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that 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 (6)
1. A radiofrequency ablation catheter with a function of identifying a blood vessel wall is characterized in that: the method comprises the following steps:
a catheter (101);
a blood vessel measuring device (110) arranged inside the catheter (101) for measuring the diameter of a blood vessel;
the outer wall of the end part of the pushing pipe (201) is provided with a blood vessel measuring device (110), the pushing pipe (201) is sleeved inside the catheter (101) and used for driving the blood vessel measuring device (110) to push out or retract the catheter (101);
the push switch (109) comprises a push sliding block (301), the push sliding block (301) is installed outside a fixed sleeve rod (302) in a sliding mode, the push sliding block (301) is connected with the end portion of the push pipe (201) through the fixed sleeve rod (302), the push sliding block (301) is pushed to drive the push pipe (201) to move, and the blood vessel measuring device (110) is further enabled to be sent out of the guide pipe (101);
a cover shell (306) is arranged at the bottom of the fixed sleeve rod (302), and an elastic part protective sleeve (304) is screwed at the bottom of the cover shell (306);
an elastic piece (305) is arranged inside the elastic piece protective sleeve (304), and the bottoms of the elastic piece (305) and the elastic piece protective sleeve (304) are connected with a supporting block (303) together;
a heating coil (102) is wound outside the catheter (101), a stress diffusion tube (104) is arranged outside the catheter (101) far away from the blood vessel measuring device (110), and a positioning ring (103) is arranged at one end of the stress diffusion tube (104);
the other end of the stress diffusion tube (104) is provided with a handle (106), one end, far away from the catheter (101), of the handle (106) is provided with a connecting cable (107), and a connector (108) is connected to the connecting cable (107).
2. The rf ablation catheter with vessel wall identification function of claim 1, wherein: the blood vessel measuring device (110) is formed by winding a memory nickel-titanium alloy wire and has an umbrella-shaped or rectangular reticular structure.
3. The rf ablation catheter with vessel wall identification function of claim 1, wherein: the handle (106) is provided with a power switch (105), and the handle (106) is also provided with the push switch (109).
4. The rf ablation catheter with vessel wall identification function of claim 1, wherein: one end of the handle (106) close to the connecting cable (107) is provided with a tail fixing clip (202) for fixing the catheter (101) inside the handle (106).
5. The rf ablation catheter with vessel wall identification function of claim 1, wherein: the end part of the pushing tube (201) is connected with a glue head (401) for passing through the vessel wall.
6. The rf ablation catheter with vessel wall identification function of claim 5, wherein: the material of the pushing pipe (201) is polyether block polyamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111490349.4A CN114224473B (en) | 2021-12-08 | 2021-12-08 | Radio frequency ablation catheter with function of identifying vascular wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111490349.4A CN114224473B (en) | 2021-12-08 | 2021-12-08 | Radio frequency ablation catheter with function of identifying vascular wall |
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| CN114224473A CN114224473A (en) | 2022-03-25 |
| CN114224473B true CN114224473B (en) | 2023-04-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114711955B (en) * | 2022-05-11 | 2022-11-01 | 上海安通医疗科技有限公司 | Electric control ablation catheter for radial artery |
| CN115153814B (en) * | 2022-06-23 | 2023-04-14 | 上海玮琅医疗科技有限公司 | Bracket type radio frequency ablation catheter |
| CN115381548B (en) * | 2022-08-01 | 2023-09-19 | 上海玮琅医疗科技有限公司 | Radio frequency ablation catheter capable of locking connection tail wire |
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| CN102274074A (en) * | 2011-05-03 | 2011-12-14 | 上海微创电生理医疗科技有限公司 | Multi-electrode open-type radio frequency ablation catheter |
| CN104254366A (en) * | 2011-12-09 | 2014-12-31 | 麦特文申公司 | Therapeutic neuromodulation of the hepatic system |
| CN113317868A (en) * | 2021-06-29 | 2021-08-31 | 苏州心岭迈德医疗科技有限公司 | Pulse field ablation catheter and equipment |
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| US5788692A (en) * | 1995-06-30 | 1998-08-04 | Fidus Medical Technology Corporation | Mapping ablation catheter |
| US9468417B1 (en) * | 2011-06-15 | 2016-10-18 | Acist Medical Systems, Inc. | Stenotic lesion characterization |
| US9549679B2 (en) * | 2012-05-14 | 2017-01-24 | Acist Medical Systems, Inc. | Multiple transducer delivery device and method |
| CN211750039U (en) * | 2019-12-31 | 2020-10-27 | 杭州堃博生物科技有限公司 | Ablation catheter with mark |
| CN111407397A (en) * | 2020-03-24 | 2020-07-14 | 苏州朗开医疗技术有限公司 | Lung cancer treatment radio frequency ablation electrode catheter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274074A (en) * | 2011-05-03 | 2011-12-14 | 上海微创电生理医疗科技有限公司 | Multi-electrode open-type radio frequency ablation catheter |
| CN104254366A (en) * | 2011-12-09 | 2014-12-31 | 麦特文申公司 | Therapeutic neuromodulation of the hepatic system |
| CN113317868A (en) * | 2021-06-29 | 2021-08-31 | 苏州心岭迈德医疗科技有限公司 | Pulse field ablation catheter and equipment |
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