CN115153753A - Self-adaptive flexible electrode balloon device - Google Patents
Self-adaptive flexible electrode balloon device Download PDFInfo
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- CN115153753A CN115153753A CN202210936593.7A CN202210936593A CN115153753A CN 115153753 A CN115153753 A CN 115153753A CN 202210936593 A CN202210936593 A CN 202210936593A CN 115153753 A CN115153753 A CN 115153753A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
- A61B17/22022—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement using electric discharge
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/104—Balloon catheters used for angioplasty
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00867—Material properties shape memory effect
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00938—Material properties hydrophobic
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
- A61B2017/22025—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement applying a shock wave
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/109—Balloon catheters with special features or adapted for special applications having balloons for removing solid matters, e.g. by grasping or scraping plaque, thrombus or other matters that obstruct the flow
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Abstract
The invention provides a self-adaptive flexible electrode balloon device, which comprises a balloon; an inner tube extending along an axis of the balloon; the electrode group is sleeved on the outer wall of the inner tube and positioned inside the saccule; the electrode group comprises a first electrode and a second electrode, the first electrode and the second electrode are arranged along the axis of the inner tube, at least one end part of the first electrode is provided with the second electrode at intervals, and a discharge point is formed between the surfaces of the first electrode and the second electrode which are oppositely arranged; the first electrode has an axial dimension greater than an axial dimension of the second electrode, and the first electrode is bendable to extend along an inner wall of the blood vessel in adaptation to a curved configuration of the blood vessel; the first electrode comprises a metal pipe body, at least one thread-shaped gap is arranged on the metal pipe body, and the thread-shaped gap extends along the axis of the metal pipe body and does not extend to any end face of the metal pipe body. This solution reduces the radial dimensions of the electrodes and provides the electrode group with sufficient flexibility.
Description
Technical Field
The invention relates to the technical field of medical treatment, in particular to a self-adaptive flexible electrode balloon device.
Background
Angioplasty is a technique of physically dilating a stenosed lesion in a blood vessel using a balloon catheter to keep the blood vessel patent again. The balloon catheter with electrode uses the liquid-electric effect to generate shock waves to destroy the focus, expand narrow blood vessels and restore the smoothness of the blood vessels, which is a common angioplasty operation technology. In the related art, the electrodes are usually arranged in a multilayer arrangement mode, and the outer diameter of the catheter is increased due to the overlapped electrodes, so that the trafficability of the balloon is influenced, and the device is difficult to pass through a narrow region of a blood vessel; so that the operation of the narrow lesion part can not be carried out, and the application range of the device is reduced. In addition, the surface of the electrode in the related art is provided with glue or a heat-shrinkable tube to achieve the purpose of insulation, and the glue is dried and hardened to cause the poor flexibility of the electrode and is difficult to bend and pass through tiny blood vessels. And the heat shrinkable tube is difficult to accurately position, and even the problem of shielding the discharge point of the electrode occurs, so that the discharge of the electrode is influenced. In addition, the glue or the heat shrink tube can greatly increase the outer diameter of the electrode, so that the device is difficult to pass through narrow blood vessels. The more central problem is that the electrodes of the related art are poor in flexibility and difficult to adapt to the curved morphology of the blood vessel. Although there are electrode schemes that adopt a winding wire to improve flexibility, the size of the discharge gap between the electrodes after the electrode is bent is difficult to control, for example, the partial distance is reduced and the partial distance is increased, so that the discharge intensity of the electrode is difficult to control, and the operation effect is greatly influenced.
Disclosure of Invention
In order to overcome at least one of the problems of the related art shock wave generation devices, the present invention provides an adaptive flexible electrode balloon device, comprising:
a balloon;
an inner tube extending along an axis of the balloon;
the electrode group is sleeved on the outer wall of the inner tube and positioned inside the saccule;
the electrode group comprises a first electrode and a second electrode, the first electrode and the second electrode are arranged along the axis of the inner tube, at least one end part of the first electrode is provided with the second electrode at intervals, and a discharge point is formed between the surfaces of the first electrode and the second electrode which are oppositely arranged;
the first electrode has an axial dimension greater than an axial dimension of the second electrode, and the first electrode is bendable to extend along an inner wall of the blood vessel in adaptation to a curved configuration of the blood vessel;
the first electrode comprises a metal pipe body, at least one thread-shaped gap is arranged on the metal pipe body, and the thread-shaped gap extends along the axis of the metal pipe body and does not extend to any end face of the metal pipe body.
In a plurality of optional embodiments, the metal pipe body is made of a material selected from one of metal and metal alloy.
In alternative embodiments, a developing ring is disposed at an interval at each end of the electrode group.
In a plurality of optional embodiments, the electrode sets comprise a plurality of groups, and the groups of electrode sets are sequentially arranged along the outer wall of the inner tube.
In alternative embodiments, the outer surfaces of the first and second electrodes are provided with an insulating coating.
In a plurality of optional embodiments, the insulating coating is an insulating composite coating, and the insulating composite coating at least comprises an aluminum oxide coating and a silicone resin coating, wherein the aluminum oxide coating is at least coated on the surface of the metal pipe body, and the silicone resin coating is arranged on the outer side of the aluminum oxide coating.
In optional multiple embodiments, the position of at least one of the first electrode and the second electrode is adjustable, and when the distance between the first electrode and the second electrode is greater than a set threshold, the position of the electrode is adjusted to obtain the distance required for discharging.
In optional embodiments, the position of the second electrode is adjustable, and when it is monitored that the separation distance between the first electrode and the second electrode is greater than a set threshold, the position of the second electrode is adjusted to obtain the separation distance required for discharge.
In various alternative embodiments, the first electrode is electrically connected to the pulse control device and receives an electrical signal from the pulse control device to generate a shock wave within the balloon.
In various optional embodiments, the first electrode is made of a memory alloy.
The technical scheme of the invention has the following advantages or beneficial effects:
(1) The electrode group only comprises the first electrode and the second electrode, and the first electrode is provided with the spirally extending gap, so that the electrode with flexibility has the advantages of simple structure, low manufacturing cost and convenience in assembly. And because the end parts of the first electrode and the second electrode do not have the characteristic of reducing the structural strength, when the electrode group is bent to adapt to the bending state of the blood vessel, the end part of the first electrode and the second electrode are not basically deformed, and the spacing distance between the surfaces of the first electrode opposite to the second electrode is basically unchanged, so that the discharge distance of the electrode group is kept unchanged, and the discharge strength always meets the design requirement. Compared with the scheme of winding the cable, the electrode does not need to control the winding shape and the pitch length of the electrode on the inner pipe, and only needs to be sleeved on the outer wall of the inner pipe after the spiral gap is processed, so that the assembly process difficulty and the production cost of the electrode are greatly reduced. In addition, compared with a scheme of winding a cable, the distance between the discharge points between the electrodes is more stable, the problems that the discharge distance between the surfaces of the bending parts in the scheme of winding the cable is different everywhere and the distance change gradient is extremely large are solved, and the stability of the discharge strength is effectively ensured.
(2) The insulating composite coating not only ensures the insulating property of the electrode, but also effectively reduces the outer diameter of the electrode device, so that the electrode device can pass through tiny blood vessels, and the application range of the electrode device is enlarged. Compared with insulating glue or heat-shrinkable tubes, the coating control precision of the insulating coating is higher, the position to be insulated can be coated accurately, and the discharge end face can be exposed completely. And meanwhile, the thickness of the coating is small, so that the radial size of the electrode is effectively reduced.
(3) The aluminum oxide has good heat resistance, is not easy to separate from the surface of the electrode after being coated, and ensures that the electrode has good insulating property. In addition, the organic silicon resin coating has good thermal stability and hydrophobicity, is not easy to generate chemical reaction, and avoids the corrosion of an electrode. In addition, the organic silicon resin can improve the flexibility of the electrode, and after the organic silicon resin is matched with aluminum oxide for use, the insulating property of the electrode group is further improved, so that the insulating property required by safety is still maintained under the condition that the outer diameter of the electrode group is reduced.
(4) At least one of the first electrode or the second electrode is adjustable in position, the spacing distance between the electrodes is guaranteed to be within a reasonable breakdown distance all the time, the safety and the stability of the device are guaranteed, and the device has a long service life.
(5) The first electrode is made of memory alloy, so that the first electrode can be quickly restored to the original shape, and the electrode can conveniently penetrate through a complex blood vessel structure.
Drawings
The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:
fig. 1 is a schematic diagram of an adaptive flexible electrode balloon apparatus according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a first electrode without an external force according to an embodiment of the invention;
FIG. 3 is a diagram illustrating a curved state of a first electrode after being subjected to an external force according to an embodiment of the invention;
FIG. 4 is a schematic illustration of the operating state of an adaptive flexible electrode balloon apparatus according to an embodiment of the present invention;
FIG. 5 is a partially enlarged schematic view of an operating state of an adaptive flexible electrode balloon apparatus according to an embodiment of the invention;
fig. 6 is a schematic view of another balloon apparatus according to an embodiment of the invention;
FIG. 7 is a schematic view of a balloon device having multiple sets of electrodes according to an embodiment of the present disclosure;
fig. 8 is a schematic view of a balloon device provided with an insulating coating according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
To address at least one of the problems in the background, an adaptive flexible electrode balloon apparatus is provided according to an aspect of an embodiment of the present invention.
In the related art, the shock wave generated by the liquid-electricity effect is utilized to break calcified sediments on the blood vessel so as to effectively dredge the blood vessel. The essential working principle is that liquid is quickly vaporized under a high-voltage strong electric field to form steam bubbles and expands outwards, and strong shock waves are generated outside a quickly expanded air cavity to break calcified sediments. As described in the background art, the electrodes in the related art are often arranged in a stacking manner, and if the inner ring electrode and the outer ring electrode are stacked and sleeved, the outer diameter of the device is significantly increased, so that the overall outer diameter of the device is increased, and the device cannot be applied to small blood vessels; resulting in a substantial reduction in the range of use of the device. In addition, in order to fix the electrode or the insulated electrode, the surface of the electrode is coated with insulating glue or sleeved with a heat-shrinkable tube, both of which increase the outer diameter of the electrode part, which results in the increase of the radial dimension of the whole structure of the balloon device and affects the passability. Moreover, after the insulating glue is cured, the hardness of the electrode is increased, the flexibility is reduced, and the electrode cannot adapt to the bending form of the blood vessel; the heat shrink tube cannot accurately cover the surface of the electrode to be insulated, and the discharge point of the electrode is often affected by improper covering. Although the prior art has adopted the electrode with the spiral lead structure, after the electrode is bent, the size of the space between each position and another electrode is changed drastically, so that the deviation between the discharge intensity of the electrode and the designed value is large, and the discharge uniformity cannot be controlled accurately. Particularly, after the electrode is gradually worn, the randomness of the interval change is stronger, so that the wearing of the electrode is further intensified, and the service life of the device is reduced.
To overcome at least one of the above problems, in one embodiment of the present invention, an adaptive flexible electrode balloon apparatus is provided as shown in fig. 1. The electrode balloon apparatus includes a balloon 5 which may be used as a protective shell for the electrodes and may also be used to carry solutions. And an inner tube extending along an axis of the balloon; the two axial ends of the saccule are fixedly connected with the inner tube 4, so that a communication space between the inner wall of the saccule and the wall surface of the inner tube forms a closed area. The device also comprises an electrode group, wherein the electrode group is sleeved on the outer wall of the inner tube and is positioned inside the saccule. In practice, the electrode group may be fixed on the outer wall of the inner tube by means of shape clamping, or may be fixed on the outer wall of the inner tube by means of interference fit, or may be fixedly connected with the outer wall of the inner tube by means of adhesion. The electrode group comprises a first electrode and a second electrode, and the first electrode and the second electrode are arranged along the axis of the inner tube. In one embodiment, the first electrode and the second electrode are both in a tubular thin shell structure and are sequentially sleeved on the outer wall of the inner tube along the axial direction, so that the problem that the outer diameter of the electrode group is increased due to electrode overlapping is avoided, and the size of the electrode group is reduced as much as possible. A second electrode is arranged at least one end part of the first electrode at intervals, and a discharge point is formed between the surfaces of the first electrode and the second electrode which are oppositely arranged. As shown in fig. 1, two ends of the first electrode 1 are provided with a second electrode 2 at intervals, and a discharge point is formed between the opposite end faces of the two electrodes. In practice, after the first electrode is loaded with the high-voltage pulse voltage, the discharge point between the two electrodes can discharge. The first electrode has an axial dimension greater than an axial dimension of the second electrode, and the first electrode is bendable to extend along an inner wall of the blood vessel in adaptation to a curved configuration of the blood vessel. In order to increase the flexibility of the second electrode, the axial dimension of the second electrode is increased in one embodiment to improve the flexibility of the second electrode, so that the second electrode can be easily changed from the straight state shown in fig. 2 to the bent state shown in fig. 3 under the action of external force. Optionally, the axial dimension of the first electrode may be several times the axial dimension of the second electrode. In practice, on the premise of meeting the service life, the axial size of the second electrode can be properly reduced, the axial size of the first electrode can be increased, and the structural adjustment can further increase the overall flexibility of the electrode group, so that the electrode group can be more easily adaptive to the bending structure of a blood vessel. Furthermore, the first electrode comprises a metal tube body, at least one thread-shaped gap is arranged on the metal tube body, and the thread-shaped gap extends along the axis of the metal tube body and does not extend to any end face of the metal tube body. As shown in fig. 1 to 3, the first electrode is made of a metal tube, which not only ensures conductivity, but also reduces the structural complexity of the electrode, making it easier to process. When a metal pipe body is adopted, how to make the metal pipe body have enough flexibility is an urgent problem to be overcome. In one embodiment of the invention, at least one thread slit is processed on the surface of the electrode tube body in a hollow way, and the slit spirally advances along the axis of the tube body. The gap reduces the structural strength, enabling it to maintain sufficient flexibility. Of course, the width, pitch or number of the spiral slits may be adjusted appropriately according to the actual use requirement, and is not limited specifically here. In practice, the slit can be made by laser engraving and other processes. Further, the gap does not extend to any end face of the metal pipe body. It should be noted that, as shown in fig. 1 to 3, the spiral slit 11 does not extend to both ends of the tubular body of the first electrode, that is, both ends of the first electrode do not have any feature of reducing the structural strength, which can ensure that the end of the first electrode has sufficient strength. According to paschen's law, the discharge distance between the electrodes has an important influence on the breakdown voltage, so that it is particularly important to control the spacing distance between the electrodes and the surface, which greatly influences the shock wave generation effect of the balloon device. As can be seen from the foregoing description, in the present invention, since the end portions of the first electrode and the second electrode do not have the feature of reducing the structural strength, when the electrode assembly is bent to adapt to the bending form of the blood vessel, the end portion of the first electrode and the second electrode are not substantially deformed, and the spacing distance between the surfaces of the first electrode opposite to the second electrode is substantially unchanged, so that the discharge distance is kept unchanged, and the discharge strength always meets the design requirement. Compared with a scheme of winding a cable, the electrode does not need to control the winding shape and the pitch length of the electrode on the inner pipe, and the electrode only needs to be sleeved on the outer wall of the inner pipe after a spiral gap is processed, so that the assembly process difficulty and the production cost of the electrode are greatly reduced. In addition, compare in the scheme of winding the cable, the distance of discharge point position is more stable, and the discharge distance everywhere between each surface of bending department is inequality among the winding cable scheme can not appear, and the very big problem of distance change gradient, has effectively guaranteed discharge intensity's stability.
In an optional embodiment, the metal pipe body is made of one material selected from metals or metal alloys. For the purpose of connecting the circuit and constructing the electrode pairs, in one embodiment, a metal or metal alloy is used to construct the tube itself. Of course, the first electrode and the second electrode may be made of the same or different materials. The manufacturing material includes but is not limited to titanium, copper, gold, silver, platinum, titanium alloy, stainless steel, nickel-chromium alloy, nickel-titanium shape memory alloy and the like.
In an alternative embodiment, a developing ring is disposed at an interval at both ends of the electrode group. As shown in fig. 1, in order to accurately observe the position of the electrode group in the human body, one developing ring 3 may be provided at each of both ends of the electrode group. The developing ring can be seen under the irradiation of rays, so that the electrode group can still be observed after being implanted into a human body, and an operator can conveniently and accurately position and control the position of the electrode group.
In an optional embodiment, the electrode sets include a plurality of groups, and the plurality of groups of electrode sets are sequentially arranged along the outer wall of the inner tube. In the embodiment shown in fig. 7, a plurality of electrode sets may be sleeved on the outer wall of the inner tube according to actual use requirements, so as to construct a wide range of discharge structures.
In an alternative embodiment, the outer surfaces of the first and second electrodes are provided with an insulating coating. In light of the foregoing, some embodiments of the present invention omit structures such as insulating glue or heat shrink tubing to overcome the disadvantages of the prior art. In order to ensure the insulation of the electrode surface and avoid discharge at unnecessary positions, an embodiment of the present invention provides an insulating coating 22 on the outer surfaces of the first and second electrodes for insulation. Alternatively, the electrode may be entirely coated with an insulating coating, and then the end portion of the electrode may be polished or the like to expose the metal portion of the electrode. The insulating coating can be insulating paint and the like. It should be noted that the thickness of the insulating coating is smaller than that of the glue or the heat shrink tube, so that the size of the electrode can be effectively reduced. And the coating position of the coating is controllable, and the coating precision is high.
In an optional embodiment, the insulating coating is an insulating composite coating, the insulating composite coating at least includes an aluminum oxide coating and a silicone resin coating, wherein the aluminum oxide coating is at least coated on the surface of the metal pipe body, and the silicone resin coating is disposed on the outer side of the aluminum oxide coating. In practice, the periodic discharge of the electrode generates heat to wear the electrode, resulting in deterioration of the insulation of the electrode. Therefore, the coating material needs to be properly selected to ensure the thermal stability of the electrode coating. To this end, in one embodiment, a coating of alumina is applied to the surface proximate the electrode. Because the aluminium oxide coating has good thermal stability, stable chemical property, higher strength and very stable physical and chemical properties, the aluminium oxide coating is directly coated on the surface of the electrode to bear the heat generated by the metal tube body of the electrode, thereby ensuring the insulating effect. In addition, in consideration of the flexibility of the electrode, the organic silicon resin coating is coated on the outer side of the electrode coated with the aluminum oxide in one embodiment of the present invention, and the coating can ensure that the electrode has enough toughness, and simultaneously has good thermal stability, and can work together with the aluminum oxide to ensure the required insulation effect of the electrode. In addition, the organic silicon resin coating has hydrophobicity, so that the organic silicon resin coating is difficult to reflect with a solution, and has good chemical stability. Therefore, the coating is coated on the outermost layer of the electrode, so that the stability of the electrode can be improved, and the service life of the device can be prolonged.
In an alternative embodiment, at least one of the first electrode and the second electrode is adjustable in position, and when the distance between the first electrode and the second electrode is greater than a set threshold, the position of the electrode is adjusted to obtain the distance required for discharging. As mentioned above, the electrodes are gradually worn away during use, resulting in an increased spacing between the electrodes, which, according to paschen's law, requires a greater driving voltage to break down the electric field. It is obvious that increasing the breakdown voltage reduces the lifetime of the device and poses a great risk to the insulation of the electrodes, leading to a safety hazard for the device. If the breakdown voltage is not increased, the electrode is about to be eliminated after being used for many times, so that the use cost of users is increased. For this reason, in one example of the present invention, the position of at least one of the first electrode or the second electrode is adjustable, thereby effectively solving the problem of increased spacing caused by electrode wear.
In an optional embodiment, the position of the second electrode is adjustable, and when the monitored separation distance between the first electrode and the second electrode is greater than a set threshold, the position of the second electrode is adjusted to obtain the separation distance required for discharge. In practice, because the first electrode has the spiral gap, its structural strength is lower, if directly move the position of first electrode and can have electrode deformation scheduling problem, the operation degree of difficulty is great. For this reason, in this embodiment, it is more effective to adjust only the position of the second electrode to overcome the above-described problem. In practice, the second electrode may be mounted on the outer wall of the inner tube by means of a form-fit or interference fit, and the above-mentioned connection makes it possible to adjust the position of the second electrode.
In an alternative embodiment, the first electrode is electrically connected with the pulse control device and receives an electric signal of the pulse control device to generate shock waves in the balloon. In practice, it may be found that the distribution of calcific deposits within the vessel is uneven or irregular, and to this end, one embodiment of the present invention further connects one end of the lead to the first electrode, with the other end of the lead both being electrically connected to the pulse control means. The user can operate the pulse control device to achieve the desired discharge effect, such as adjusting the discharge period or adjusting the discharge voltage.
In an alternative embodiment, the first electrode is made of a memory alloy. Since the first electrode is deformed many times when facing a complicated blood vessel structure in use, the angle of bending of the blood vessel is large in the embodiment shown in fig. 4 and 5, and if the first electrode is made of a common metal material, the electrode is difficult to restore and operate. Therefore, in the embodiment, the first electrode is made of memory metal such as nickel-titanium alloy, so that the first electrode can be quickly restored.
The above-described embodiments should not be construed as limiting the scope of the invention. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. An adaptive flexible electrode balloon apparatus, comprising:
a balloon;
an inner tube extending along an axis of the balloon;
the electrode group is sleeved on the outer wall of the inner tube and positioned inside the saccule;
the method is characterized in that:
the electrode group comprises a first electrode and a second electrode, the first electrode and the second electrode are arranged along the axis of the inner tube, at least one end part of the first electrode is provided with the second electrode at intervals, and a discharge point is formed between the surfaces of the first electrode and the second electrode which are oppositely arranged;
the first electrode has an axial dimension greater than an axial dimension of the second electrode, and the first electrode is bendable to extend along an inner wall of the blood vessel in adaptation to a curved configuration of the blood vessel;
the first electrode comprises a metal pipe body, at least one thread-shaped gap is arranged on the metal pipe body, and the thread-shaped gap extends along the axis of the metal pipe body and does not extend to any end face of the metal pipe body.
2. The adaptive flexible electrode balloon device according to claim 1,
the metal pipe body is made of one of metal or metal alloy.
3. The adaptive flexible electrode balloon device according to claim 1,
and two ends of the electrode group are respectively provided with a developing ring at intervals.
4. The adaptive flexible electrode balloon device according to claim 1,
the electrode group comprises a plurality of groups, and the plurality of groups of electrode groups are arranged in sequence along the outer wall of the inner tube.
5. The adaptive flexible electrode balloon device according to claim 1,
and the outer surfaces of the first electrode and the second electrode are provided with insulating coatings.
6. The adaptive flexible electrode balloon device according to claim 5,
the insulating coating is an insulating composite coating, the insulating composite coating at least comprises an aluminum oxide coating and a silicone resin coating, the aluminum oxide coating is at least coated on the surface of the metal pipe body, and the silicone resin coating is arranged on the outer side of the aluminum oxide coating.
7. The adaptive flexible electrode balloon device according to claim 1,
and when the spacing distance between the first electrode and the second electrode is larger than a set threshold value, the position of the electrode is adjusted to obtain the spacing distance required by discharge.
8. The adaptive flexible electrode balloon device according to claim 7,
the position of the second electrode is adjustable, and when the spacing distance between the first electrode and the second electrode is monitored to be larger than a set threshold value, the position of the second electrode is adjusted to obtain the spacing distance required by discharging.
9. The adaptive flexible electrode balloon device according to claim 8,
the first electrode is electrically connected with the pulse control device and receives an electric signal of the pulse control device to generate shock waves in the balloon.
10. The adaptive flexible electrode balloon device according to claim 1,
the first electrode is made of memory alloy.
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| CN202210936593.7A CN115153753B (en) | 2022-08-05 | 2022-08-05 | Self-adaptive flexible electrode balloon device |
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| CN202210936593.7A CN115153753B (en) | 2022-08-05 | 2022-08-05 | Self-adaptive flexible electrode balloon device |
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| CN115153753B CN115153753B (en) | 2023-01-24 |
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| CN112890945A (en) * | 2021-01-05 | 2021-06-04 | 安杭医疗科技(杭州)有限公司 | Balloon catheter device with flexible electrodes |
| CN113842190A (en) * | 2021-10-27 | 2021-12-28 | 上海微创旋律医疗科技有限公司 | Electrode balloon catheter |
| CN216495498U (en) * | 2021-09-24 | 2022-05-13 | 上海佳沐垚医疗科技有限公司 | Shock wave treatment balloon catheter |
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| US20050267467A1 (en) * | 2004-01-16 | 2005-12-01 | Saurav Paul | Bipolar conforming electrode catheter and methods for ablation |
| CN111568539A (en) * | 2020-06-16 | 2020-08-25 | 北京奇伦天佑创业投资有限公司 | Releasable stent electrode catheter for radiofrequency ablation |
| CN112890945A (en) * | 2021-01-05 | 2021-06-04 | 安杭医疗科技(杭州)有限公司 | Balloon catheter device with flexible electrodes |
| CN112754645A (en) * | 2021-01-11 | 2021-05-07 | 安杭医疗科技(杭州)有限公司 | Ablation catheter device with mapping function |
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| CN115153753B (en) | 2023-01-24 |
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