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WO2015007003A1 - 一种次圆周式超声消融导管 - Google Patents

一种次圆周式超声消融导管 Download PDF

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Publication number
WO2015007003A1
WO2015007003A1 PCT/CN2013/081433 CN2013081433W WO2015007003A1 WO 2015007003 A1 WO2015007003 A1 WO 2015007003A1 CN 2013081433 W CN2013081433 W CN 2013081433W WO 2015007003 A1 WO2015007003 A1 WO 2015007003A1
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WO
WIPO (PCT)
Prior art keywords
ultrasonic
transducer
wafer
ablation catheter
ultrasonic treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/081433
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English (en)
French (fr)
Inventor
黄晶
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Lepu Medical Technology Beijing Co Ltd
Original Assignee
Lepu Medical Technology Beijing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Lepu Medical Technology Beijing Co Ltd filed Critical Lepu Medical Technology Beijing Co Ltd
Priority to EP13889751.7A priority Critical patent/EP3017770B1/en
Publication of WO2015007003A1 publication Critical patent/WO2015007003A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N7/00Ultrasound therapy
    • A61N7/02Localised ultrasound hyperthermia
    • A61N7/022Localised ultrasound hyperthermia intracavitary
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/36Image-producing devices or illumination devices not otherwise provided for
    • A61B90/37Surgical systems with images on a monitor during operation
    • A61B2090/378Surgical systems with images on a monitor during operation using ultrasound
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/36Image-producing devices or illumination devices not otherwise provided for
    • A61B90/37Surgical systems with images on a monitor during operation
    • A61B2090/378Surgical systems with images on a monitor during operation using ultrasound
    • A61B2090/3782Surgical systems with images on a monitor during operation using ultrasound transmitter or receiver in catheter or minimal invasive instrument
    • A61B2090/3784Surgical systems with images on a monitor during operation using ultrasound transmitter or receiver in catheter or minimal invasive instrument both receiver and transmitter being in the instrument or receiver being also transmitter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • A61B8/4444Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
    • A61B8/445Details of catheter construction
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N7/00Ultrasound therapy
    • A61N2007/0004Applications of ultrasound therapy
    • A61N2007/0021Neural system treatment
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N7/00Ultrasound therapy
    • A61N2007/0004Applications of ultrasound therapy
    • A61N2007/0021Neural system treatment
    • A61N2007/003Destruction of nerve tissue
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N7/00Ultrasound therapy
    • A61N2007/0043Ultrasound therapy intra-cavitary
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N7/00Ultrasound therapy
    • A61N2007/0078Ultrasound therapy with multiple treatment transducers

Definitions

  • the present application relates to the field of medical device technology, and in particular to a sub-circumferential ultrasonic ablation catheter.
  • the principle of radiofrequency catheter is to transmit a large amount of thermal energy generated by radiofrequency energy through the inner lining of the blood vessel to the tissue surrounding the adventitia and the outer membrane by heat transfer, causing the adventitia and adventitia.
  • Sympathetic degeneration and necrosis in the surrounding tissue which inevitably causes damage to the vascular endothelium in the ablation area, and studies have found that patients have complications of renal artery stenosis during long-term follow-up.
  • Ultrasonic energy has good directionality and tissue penetration. Compared with radiofrequency ablation, ultrasound ablation uses lower energy, and does not require direct contact between the wafer and tissue when emitting acoustic energy, and can achieve ablation with intact inner membrane. Therefore, ultrasound as a source of energy for renal sympathetic neurogenesis should have higher efficiency and better safety.
  • the embodiment of the present application provides an ultrasonic ablation catheter to solve/implement.
  • An ultrasound ablation catheter comprising: a catheter body, an ultrasound therapy transducer set, an ultrasound imaging transducer set, a steering handle, and a transducer interface, wherein:
  • the conduit body is a cylindrical structure
  • the ultrasound therapy transducer set is disposed on a side of the distal end of the catheter body, the ultrasound therapy transducer set includes at least two ultrasound therapy transducers, and between two adjacent ultrasound therapy transducers The distance is greater than or equal to 1 cm;
  • the ultrasound imaging transducer set includes at least one ultrasound imaging transducer, and the ultrasound imaging transducer is positioned between two adjacent ultrasound therapy transducers;
  • the steering handle is disposed at a proximal end of the catheter body
  • the transducer interface includes a first interface coupled to the ultrasound therapy transducer set and a second interface coupled to the ultrasound imaging transducer.
  • the ultrasonic therapeutic transducer is a planar wafer or a non-closed circumferential wafer.
  • the circumferential angle of the non-closed circumferential transducer wafer is between 0° and 360 degrees. .
  • At least two of the ultrasonic therapeutic transducers are located on the same plane or curved surface, and the acoustic beams emitted by each of the ultrasonic therapeutic transducers are parallel or staggered with each other.
  • the missing portions of the at least two transducer-emitting beams of the non-closed loop ultrasonic transducer may be parallel or staggered;
  • the ultrasonic therapeutic transducer is a planar wafer
  • the long axes of each of the ultrasonic therapeutic transducers are on the same line, and each of the ultrasonic therapeutic transducers is coaxial with the axis of the catheter body Parallel
  • the ultrasonic therapeutic transducer is a non-closed circumferential wafer, the axis of each of the ultrasonic therapeutic transducer non-closed annular wafers coincides with the axis of the catheter body.
  • the circumferential angle of the non-closed circumferential wafer is less than 360.
  • the ultrasound ablation catheter can also include:
  • At least one independent ultrasound imaging transducer the independent ultrasound imaging transducer being strip shaped and the independent ultrasound imaging transducer mounted at a notch of the non-closed circumferential wafer.
  • the ultrasonic therapeutic transducer is a piezoelectric crystal visible under X-ray images, and the surface of the piezoelectric crystal is provided with a coating film visible under X-ray images.
  • the ultrasonic imaging transducer is mounted between two adjacent ultrasonic therapeutic transducers, and the ultrasonic imaging transducer is provided with a curved strip-shaped wafer or a circumferential wafer.
  • the ultrasound beam of each ultrasound therapy transducer is located within the imaging range of an adjacent ultrasound imaging transducer.
  • the ultrasonic therapeutic transducer is a planar wafer
  • the ultrasonic imaging transducer is a strip-shaped wafer having an arc surface, and the long axis of each ultrasonic imaging transducer and the ultrasonic treatment The long axes of the transducers coincide;
  • the ultrasonic therapeutic transducer is a non-closed circumferential wafer
  • the ultrasonic imaging transducer is a circumferential wafer
  • the axis of the circumferential wafer of each of the ultrasonic imaging transducers is The axes of the non-closed circumferential wafers of the ultrasonic therapy transducer coincide.
  • the manipulation handle is configured to control the one-way rotation of the catheter body
  • a spring piece and a wedge gear are mounted in the control handle, and the catheter body is rotatably connected to the control handle through a wedge gear;
  • the spring piece is fixed at one end to the steering handle, and the other end is pressed against the wedge gear to prevent reverse rotation of the wedge gear.
  • the steering handle surface is circumferentially provided with a dial for determining the angle of rotation of the catheter body.
  • the method further comprises: at least two development marks visible under the X-ray image, the development marks being used to assist the operator in understanding the position of the ultrasonic ablation catheter in the body and the rotation angle;
  • At least two of said development marks are respectively located at both ends of said ultrasound treatment transducer on said catheter body,
  • the development mark is semi-annular, and both ends of the semi-annular shape of the development mark are fixed to both ends of the planar wafer;
  • the development mark is in the form of a sheet.
  • an ultrasonic treatment transducer and an ultrasound imaging transducer are disposed at a distal end portion of the catheter body 1, and each ultrasound imaging transducer is located adjacent to the two Ultrasound treatment between transducers, and the distance spanned between two adjacent ultrasonic therapeutic transducers is controlled to be in the range of 1 cm or more, so that when performing ablation treatment; the ultrasonic therapeutic transducer is laterally oriented to the catheter body By emitting an unfocused sound beam and rotating the catheter body, the ultrasonic therapeutic transducer can be rotated axially (0° to any angle) in the blood vessel and the energy can be released.
  • the nerve fiber After the asymmetry of the sympathetic nerve fiber, the nerve fiber can be obtained.
  • the truncation is a segment that is not continuous with each other, the middle segment is completely disconnected, and because the ultrasonic treatment transducer covers a long distance (> 1 cm), further ensuring that the completely disconnected nerve fibers cannot be chemotaxis and self-repairing, The stability of the sympathetic effect is guaranteed.
  • the ablation catheter provided by the embodiment of the present application is configured to rotate the sub-circumferential ultrasonic transducer through a sub-circumference (less than 360°) or a non-closed annular ultrasonic transducer to generate a sub-circumferential ultrasonic beam.
  • Sub-circumferential nerve ablation (such as three-quarter quadrant or two-thirds of a circle), while achieving effective renal nerve ablation, controlfully retains part of the sympathetic nerve bundle to maintain the body's basic sympathetic compensatory capacity.
  • FIG. 1 is a schematic top plan view of an ultrasonic ablation catheter according to an embodiment of the present invention
  • FIG. 2 is a partial schematic view of an ultrasonic ablation catheter according to an embodiment of the present application
  • FIG. 4 is a partial structural schematic view of another ultrasonic ablation catheter provided by an embodiment of the present application. detailed description
  • the present application provides a novel ultrasonic ablation catheter that takes into account the width and extent of action of the ablation electrode.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 is a schematic top plan view of an ultrasonic ablation catheter provided by an embodiment of the present application.
  • the ultrasound ablation catheter comprises: a catheter body 1, an ultrasound therapy transducer set 2, an ultrasound imaging transducer set 3, a steering handle 4 and a transducer interface 5, wherein: Both the ultrasonic therapy transducer set 2 and the ultrasound imaging transducer set 3 are disposed on the side of the distal end of the catheter body 4, the steering handle 4 is disposed at a proximal end position of the catheter body, and the transducer interface 5 includes: a first interface 51 connected to the transducer 2 and a second interface 52 connected to the ultrasound imaging transducer group 3, the transducer interface 5 functioning to supply energy to the ultrasound therapy transducer 2 set, and The imaging data of the ultrasound imaging transducer set 3 is received.
  • distal and near end refers to the relative positional relationship with the operator who operates the ablation catheter, wherein “distal” refers to the position away from the operator.
  • Proximal refers to the location near the operator.
  • the catheter body 1 has a cylindrical structure, and a side surface of the distal end of the catheter body 1 is provided with a groove for placing the ultrasonic therapeutic transducer group 2 and the ultrasonic imaging transducer group 3, and, in addition, the catheter body
  • the interior of 1 may also be a hollow structure for placing the cable between the transducer set and the transducer interface 7.
  • the purpose of the catheter body 1 is to provide support for the entire ablation catheter to deliver the ultrasound therapy transducer set 2 and the ultrasound imaging transducer set 3 into the body cavity.
  • the diameter of the catheter body 1 can be varied.
  • FIG. 2 is a schematic partial structural view of an ultrasonic ablation catheter provided by an embodiment of the present application.
  • Figure 3 is a side elevational view of Figure 2.
  • the ultrasound therapy transducer set 2 includes at least two ultrasound therapy transducers 21, at least two ultrasound therapy transducers 21 are located on the same plane or curved surface, and the sound beams emitted by each of the ultrasound therapy transducers 21 are mutually Parallel or staggered such that the emitted sound beam is an unfocused sound beam.
  • the ultrasonic therapeutic transducer 21 functions to transmit an ultrasonically tunable ultrasound beam to ablate nerve fibers located in the adventitia of the artery.
  • the ultrasonic therapy transducer 21 is a planar wafer, and at least two of the ultrasonic therapy transducers 21 are located on the same plane. Further, the long axes of each of the ultrasonic therapeutic transducers 21 are on the same straight line, and each of the ultrasonic therapeutic transducers 21 is parallel to the axial direction of the catheter body 1.
  • the ultrasonic treatment transducer group 2 includes at least two ultrasonic treatment transducers 21, and in the embodiment of the present application, as shown in FIGS. 2 and 3, the number of the ultrasonic treatment transducers 21 is three, and Adjacent two The distance between the ultrasonic therapeutic transducers 21 is greater than or equal to 1 cm.
  • the distance between the adjacent two ultrasonic therapeutic transducers 21 is controlled to be greater than or equal to 1 cm, so that when the ablation treatment is performed by the ultrasonic ablation catheter, the adjacent two ultrasonic therapeutic transducers 21 are in the secondary circumference. After ablation, the distance between two adjacent ablation points formed is greater than or equal to 1 cm, which is considered to be almost completely lost when the nerve endings exceed 10 mm, thereby avoiding the nerve fibers in Post-operative repair may affect the long-term treatment effect.
  • the ultrasonic therapeutic transducer 21 can be a piezoelectric crystal visible under the X-ray image, and a coating film visible under the X-ray image is disposed on the surface of the piezoelectric wafer, for example, gold, platinum, or the like.
  • the ultrasound imaging transducer set 3 includes at least one ultrasound imaging transducer 31, and the ultrasound imaging transducer 31 is located adjacent to the two ultrasound therapy transducers 21. Between, that is, the number of ultrasonic imaging transducers 31 is one less than the number of ultrasonic therapeutic transducers 21.
  • At least one of the ultrasound imaging transducers 31 is located on the same plane or curved surface, and each of the ultrasound treatment transducers 21 is located within the imaging range of the adjacent ultrasound imaging transducer 31.
  • the function of the ultrasound imaging transducer 31 is to provide a convex array high-frequency ultrasound image of the tissue surrounding the artery, showing the distribution of the nerve fibers and monitoring the contrast of the nerve fibers before and after the ablation, and the target can be eliminated by connecting the ultrasonic subtraction image analysis system. Interference with the surrounding tissue of the area to accurately assess the immediate effect of the ablation.
  • the ultrasonic imaging transducer 31 may be provided with a curved strip-shaped wafer on the surface, and each of the ultrasonic imaging transducers 31 The long axis coincides with the long axis of the ultrasonic therapy transducer 21, i.e., the ultrasound imaging transducer 31 is in line with the ultrasound therapy transducer 21.
  • the ultrasonic imaging transducer 31 may also be a circumferential wafer, and each of the ultrasonic imaging transducers 31 The axis of the circumferential wafer coincides with the axis of the non-closed circumferential wafer of the ultrasonic therapy transducer 21, i.e., the ultrasound imaging transducer 31 is on the same curved surface as the ultrasonic therapy transducer 21.
  • control handle 4 is located at the proximal end of the catheter body 1 .
  • the function of the manipulation handle 4 is to control the catheter body 1 to perform one-way rotation, thereby driving the ultrasonic therapy transducer 21 disposed on the catheter body 1 for angle. Controlled subcircular ablation.
  • the spring handle and the wedge gear are installed in the control handle 4, and the catheter
  • the body is rotatably connected to the steering handle by a wedge gear.
  • one end of the spring piece is fixed to the steering handle 4, and the other end is pressed against the wedge gear to prevent the wedge gear from rotating in the reverse direction.
  • a dial 8 for determining the rotation angle of the catheter body may be provided on the surface circumference of the manipulation handle 4.
  • a stepping motor can be mounted in the joystick 4, and the wedge gear is driven to rotate in a set direction by a fixed angle.
  • the ablation catheter may be provided with: at least two development marks 6.
  • the material of the at least two development marks 6 is a material visible under the X-ray image, and at least two of the development marks 6 are respectively located on the catheter body 1 and are located at both end positions of the ultrasonic therapy transducer 21.
  • the ultrasonic treatment transducer 21 when the ultrasonic treatment transducer 21 is a planar wafer, the development mark 6 is semi-annular, and the Both ends of the semicircular shape of the developing mark 6 are fixed to both ends of the planar wafer.
  • the operator when rotated, the operator can determine the position of the ultrasonic therapeutic transducer 21 in accordance with the shape of the developing mark 6.
  • an ultrasonic treatment transducer and an ultrasound imaging transducer are disposed at a distal end portion of the catheter body 1, and each ultrasound imaging transducer is located adjacent to the two Ultrasound treatment between transducers, and the distance span between two adjacent ultrasonic therapeutic transducers is controlled to be in the range of 1 cm or more, so that when performing ablation treatment; the ultrasonic therapeutic transducer is laterally oriented to the catheter body By emitting parallel or staggered unfocused sound beams, rotating the catheter body allows the ultrasonic therapeutic transducer to rotate axially within the blood vessel (0. ⁇ any angle) and release the energy.
  • the nerve fibers can be cut into segments that are not continuous with each other and the middle segment is completely disconnected, and the ultrasonic beam coverage distance (> l cm) of the ultrasound treatment further ensures that the completely broken nerve fibers cannot chelate with each other and Self-repairing ensures the stability of the sympathetic effect.
  • the ablation catheter provided by the embodiment of the present application is provided with a sheet-like ultrasonic transducer during use. Rotating through the sub-circumference (less than 360°), or non-closed loop ultrasonic transducer to emit a sub-circumferential ultrasound beam, producing a sub-circumferential nerve ablation (such as a three-quarter quadrant or two-thirds of a circumference) effect While effective renal nerve ablation, a portion of the sympathetic nerve bundle is controlled to maintain the basic sympathetic compensatory capacity of the body.
  • Embodiment 2 :
  • the ultrasonic therapy transducer 21 is a planar wafer
  • the catheter body 1 needs to be rotated by controlling the manipulation handle 4, thereby driving the ultrasonic therapy transducer 21 to perform circumferential motion to achieve The nerve undergoes circumferential ablation.
  • the operator needs to monitor the ablation zone in real time, and slowly rotate the catheter body 1, which increases the operator's operation difficulty, and has high requirements for the operator, and may even affect the ablation due to improper operation of the operator. effect.
  • the ultrasonic therapy transducer 21 is a non-closed ring-shaped wafer, and each ultrasonic treatment is changed.
  • the circumferential angle of the non-closed circumferential wafer of the energy device 21 is zero. ⁇ 360°, and at least two ultrasonic therapy transducers 21 are located on the same curved surface.
  • each non-closed circumferential wafer coincides with the axis of the catheter body 1, while the notches of each non-closed annular wafer are coaxial with each other or different axes, such that all ultrasonic therapeutic transducers 21
  • the emitted sound beams are parallel or interlaced to cover the distribution of renal sympathetic nerves.
  • a non-closed circumferential wafer is used, so that when the ablation is performed, the subcircular ablation of the nerve can be completed without rotating the catheter body 1, so that the ablation operation is simpler and more convenient.
  • the ultrasonic therapy transducer 21 is a non-closed circumferential patch and the circumferential angle of the non-closed circumferential wafer is less than 360.
  • the ultrasound ablation catheter can also include: a plurality of independent ultrasound imaging transducers 7.
  • Each of the independent ultrasound imaging transducers 7 is located at a notch position of a non-closed circumferential wafer of the ultrasonic therapy transducer 21, and the independent ultrasound imaging transducer 7 may be a planar structure or a non-closed circumferential wafer. A complete ring.
  • the purpose of the independent ultrasound imaging transducer 7 is to: After the ablation zone is found using the ultrasound imaging transducer 21, the catheter body 1 can be rotated and the ablation zone scanned with the independent ultrasound imaging transducer 7 for overall understanding of the nerve Distribution location, etc.
  • the development mark 6 provided on the catheter body 1 may also be in the form of a sheet.
  • the sheet-like development mark 6 may be located at the notch position of the non-closed ring-shaped wafer, and the long axis of the development mark coincides with the long axis of the ultrasonic treatment transducer non-closed circumferential wafer notch.

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Abstract

一种超声消融导管包括导管本体(1)、超声治疗换能器组(2)、超声成像换能器组(3)、操控手柄(4)和换能器接口(5)。导管本体(1)为圆柱状结构,超声治疗换能器组(2)设置在导管本体(1)远端的侧面上,呈片状或呈非闭合环状,可发射线状或次圆周状超声束。相邻两个超声治疗换能器(21)之间跨越的距离5slcm。超声成像换能器(31)位于相邻两个超声治疗换能器(21)之间。操控手柄(4)设置在导管本体(1)的近端。换能器接口(5)包括:第一接口(51)和第二接口(52)。该消融导管对交感神经纤维进行消融后,可将神经纤维截断为互不相连续、中间段完全离断的节段,并且由于超声治疗换能器(21)覆盖较长距离(Sslcm),避免完全离断的神经纤维相互趋化和自行修复,提高去交感效果的稳定性。

Description

一种次圆周式超声消融导管
本申请要求于 2013 年 7 月 19 日提交中国专利局、 申请号为 201310306443.9、 发明名称为 "一种次圓周式超声消融导管" 的中国专利申请 的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本申请涉及医疗器械技术领域 , 特别是涉及一种次圓周式超声消融导管。
背景技术 内以螺旋形点状消融,能量通过肾动脉内膜作用于血管外膜及脂肪组织内的交 感神经纤维, 达到降低肾脏及机体交感张力, 降低血压的目的, 目前已成为顽 固性高血压极具前景的治疗方式。 此外, 一些新的研究发现, 降低肾脏及机体 交感神经活性不但可以降低血压,还可治疗心力衰竭、减少心律失常及猝死发 生、 改善血糖代谢、 降低机体炎症水平等效应。 射频导管在实现肾交感神经消 融时, 其原理是通过热传递的方式将射频能量产生的大量热能,通过血管内膜 逐步传递至血管外膜及外膜周围的组织,引起血管外膜及外膜周围组织内的交 感神经变性坏死, 这种方式不可避免地会对消融区域血管内皮产生损伤, 并且 已有研究发现, 在长期随访中有患者出现肾动脉狭窄的并发症。
超声能量具有良好的方向性、 组织穿透性, 与射频消融相比, 超声消融 使用的能量更低, 并且发射声能时无需晶片与组织直接接触, 可在内膜完整的 情况下实现消融,所以以超声作为能量来源用于肾去交感神经化应具有更高的 效率和更好的安全性。
研究表明, 神经纤维在节段性损伤后, 远侧的神经能对近侧再生的神经 轴突产生营养和趋化作用, 并在神经断端间再造管道相连, 其间隔在 5 mm时 趋化性最强; 但是神经断端的间距较大时, 弥散的神经营养和趋化因子无法达 到有效浓度, 研究表明当神经断端超过 10 mm时这种自我修复功能几乎完全 丧失 ( Politis MJ, et al. Tropism in nerve regeneration in vivo. Attraction of regenerating axons by diffusible factors derived from cells in distal nerve stumps of transected peripheral nerves. Brain Res. 1982;253: 1-12. ), 所以在进行消融时, 若 使用较短的电极或晶片实施消融,交感神经纤维在术后可能自行修复而影响远 期治疗效果; 而使用过长的消融电极或晶片则译放的能量将大大增强, 这将增 加血管损伤产生消融并发症的风险。
此外, 通过对现有技术的研究, 发明人发现: 目前已有的肾去交感消融 导管均无法明确肾交感神经在肾动脉周围的分布情况,一种是采用螺旋形或点 状的 "经验性" 消融, 这在操作上存在一定的盲目性, 既无法高效地消融肾交 感神经纤维, 同时对无神经分布的组织也带来了不必要的损伤; 另一种是采用 环周式超声消融肾去交感的消融,但环周式超声消融可能会导致完全的去交感 效果, 而众所周知交感神经反应却是维持机体稳态的重要机制之一, 所以采用 环周式消融可能存在过度去交感的问题, 可能造成患者术后应激能力下降,机 体将不能 ·!氏御外界有害刺激, 如保持循环容量、 电解质水平和血压稳定, 可能 显著降低机体的应激能力, 在遭遇失血、 电解质紊乱等状况时, 甚至可能增加 患者的死亡率, 并且环周式的消融有可能加剧肾动脉内膜的损伤, 导致术后出 现动脉狭窄、 纤维化、 血栓形成等严重的并发症。
因此, 现有的肾去交感治疗导管无法满足临床需求, 亟需一种新型的消 融导管。
发明内容
有鉴于此, 本申请实施例提供一种超声消融导管, 以解决 /以实现。
为了实现上述目的, 本申请实施例提供的技术方案如下:
一种超声消融导管, 包括: 导管本体、 超声治疗换能器组、 超声成像换能 器组、 操控手柄和换能器接口, 其中:
所述导管本体为圓柱状结构;
所述超声治疗换能器组设置在所述导管本体远端的侧面上,所述超声治疗 换能器组包括至少两个超声治疗换能器,并且相邻两个超声治疗换能器之间的 距离大于或等于 1厘米;
所述超声成像换能器组包括至少一个超声成像换能器,并且所述超声成像 换能器位于相邻两个超声治疗换能器之间;
所述操控手柄设置在所述导管本体的近端;
所述换能器接口包括:与所述超声治疗换能器组相连接的第一接口和与所 述超声成像换能器相连的第二接口。 优选地, 所述超声治疗换能器为平面晶片或非闭合环周状晶片。 优选地, 所述非闭合环周状换能器晶片的环周角度在 0° 〜360。 。
优选地, 至少两个所述超声治疗换能器位于同一平面或曲面上, 并且每个 超声治疗换能器发射的声束相互平行或交错。
所述非闭合环状超声换能器的至少两个换能器发射声束的缺失部分可相 互平行或交错;
优选地, 若所述超声治疗换能器为平面晶片,每个所述超声治疗换能器的 长轴位于同一直线上,并且每个所述超声治疗换能器均与所述导管本体的轴线 相平行;
若所述超声治疗换能器为非闭合环周状晶片,每个所述超声治疗换能器非 闭合环形晶片的轴线与所述导管本体的轴线相重合。
优选地, 当所述非闭合环周状晶片的环周角度小于 360。 时, 该超声消融 导管还可以包括:
至少一个独立超声成像换能器, 所述独立超声成像换能器的形状为条形, 并且所述独立超声成像换能器安装在所述非闭合环周状晶片的缺口处。
优选地, 所述的超声治疗换能器为 X线影像下可视的压电晶体, 并且所 述压电晶体的表面设置有 X线影像下可视的镀膜。
优选地, 所述超声成像换能器安装在相邻两个超声治疗换能器之间, 并且 所述的超声成像换能器为表面设置有弧形的条带状晶片或环周状晶片,每个超 声治疗换能器的声束均位于相邻的超声成像换能器的成像范围内。
优选地, 若所述超声治疗换能器为平面晶片, 则所述超声成像换能器为表 面呈弧形的条带状晶片,并且每个超声成像换能器的长轴与所述超声治疗换能 器的长轴相重合;
若所述超声治疗换能器为非闭合环周状晶片,则所述超声成像换能器为环 周状晶片,并且每个所述超声成像换能器的环周状晶片的轴线与所述超声治疗 换能器的非闭合环周状晶片的轴线相重合。
优选地, 所述操控手柄用于控制所述导管本体进行单向旋转;
所述操控手柄内安装有弹簧片和楔形齿轮,所述导管本体通过楔形齿轮与 所述操控手柄可转动连接; 所述弹簧片一端与所述操控手柄相固定, 另一端与楔形齿轮相挤压, 用于 避免楔形齿轮反向转动。
优选地,所述操控手柄表面环周设置有用于确定导管本体转动角度的刻度 盘。
优选地, 进一步包括: 至少两个在 X线影像下可视的显影标记, 所述显影标记用于辅助操作人员了解超声消融导管在体内的位置以及旋 转角度;
至少两个所述显影标记分别位于所述导管本体上所述超声治疗换能器两 端位置,
当所述超声治疗换能器为平面晶片时, 所述显影标记为半环形, 并且所述 显影标记的半环形的两端与所述平面晶片的两端相固定;
当所述超声治疗换能器为非闭合环周状晶片时, 所述显影标记为片状。 由 以上技术方案可见, 本申请实施例提供的该消融导管中,在导管本体 1的远端 部分设置有超声治疗换能器和超声成像换能器,每个超声成像换能器位于相邻 两个超声治疗换能器之间,并且相邻两个超声治疗换能器之间跨越的距离控制 在大于等于 1cm的范围, 这样在进行消融治疗时; 超声治疗换能器向导管本 体侧向式发射非聚焦声束, 转动导管本体, 就可以使得超声治疗换能器在血管 内进行轴向性旋转(0° 〜任意角度) 并译放能量, 对交感神经纤维进行消融 后, 可将神经纤维截断为互不相连续、 中间段完全离断的节段, 并且由于超声 治疗换能器覆盖较长距离 ( > 1 cm ), 进一步保证了完全离断的神经纤维无法 相互趋化和自行修复, 保证了去交感效果的稳定性。
同时, 本申请实施例提供的该消融导管在使用时, 其内设置片状超声换能 器通过次圓周 (小于 360° )旋转, 或非闭合环状超声换能器发射次圓周超声 束, 产生次圓周的神经消融(如四分之三象限或三分之二圓周)效果, 在达成 有效肾神经消融的同时,有控制地保留部分交感神经束, 以保持机体基本的交 感代偿能力。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地, 下面描述 中的附图仅仅是本申请中记载的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本申请实施例提供的一种超声消融导管的整体俯视示意图; 图 2为本申请实施例提供的一种超声消融导管的局部结构示意图; 图 3为图 2的侧视示意图;
图 4为本申请实施例提供的另一种超声消融导管的局部结构示意图。 具体实施方式
为了使本技术领域的人员更好地理解本申请中的技术方案,下面将结合本 申请实施例中的附图, 对本申请实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本申请一部分实施例, 而不是全部的实施例。 基 于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获 得的所有其他实施例, 都应当属于本申请保护的范围。
有研究表明神经纤维在节段性损伤后,远侧的神经能对近侧再生的神经轴 突产生营养和趋化作用, 并在神经断端间再造管道相连, 其间隔在 5 mm时趋 化性最强; 但是神经断端的间距较大时, 弥散的神经营养和趋化因子无法达到 有效浓度, 研究表明当神经断端超过 10 mm时这种自我修复功能几乎完全丧 失 ( Politis MJ, et al. Tropism in nerve regeneration in vivo. Attraction of regenerating axons by diffusible factors derived from cells in distal nerve stumps of transected peripheral nerves. Brain Res. 1982;253: 1-12. ), 所以在进行消融时, 若 使用较短的电极或晶片实施消融,交感神经纤维在术后可能自行修复而影响远 期治疗效果; 而使用过长的消融电极或晶片则译放的能量将大大增强, 这将增 加血管损伤产生消融并发症的风险。
为此, 考虑到消融电极的作用宽度和范围, 本申请提供一种新型的超声消 融导管。
实施例一:
图 1为本申请实施例提供的超声消融导管的整体俯视示意图。
如图 1所示, 该超声消融导管包括: 导管本体 1、 超声治疗换能器组 2、 超声成像换能器组 3、 操控手柄 4和换能器接口 5 , 其中: 超声治疗换能器组 2和超声成像换能器组 3均设置在导管本体 4的远端的 侧面上, 操控手柄 4设置在导管本体的近端位置, 换能器接口 5包括: 与超声 治疗换能器 2组相连接的第一接口 51和与超声成像换能器组 3相连接的第二 接口 52, 换能器接口 5的作用是为了向超声治疗换能器 2组提供能量, 并接 收超声成像换能器组 3的成像数据。
需要说明的是, 在本文中, "远端" 和 "近端" 等位置关系均是指与操作 该消融导管的操作人员的相对位置关系, 其中, "远端" 是指远离操作人员的 位置, "近端,, 是指靠近操作人员的位置。
如图 1所示, 导管本体 1为圓柱状结构, 导管本体 1的远端的侧面上设置 有凹槽, 以放置超声治疗换能器组 2和超声成像换能器组 3 , 另外, 导管本体 1的内部还可以为中空结构, 以便放置换能器组与换能器接口 7之间的线缆。 导管本体 1的作用是为整个消融导管提供支撑,以便将设置在超声治疗换能器 组 2和超声成像换能器组 3送入到人体腔室内。 此外, 根据临床需要, 导管本 体 1的直径可以有多种选择。
图 2为本申请实施例提供的超声消融导管的局部结构示意图。
图 3为图 2的侧视示意图。
超声治疗换能器组 2 包括至少两个超声治疗换能器 21 , 至少两个超声治 疗换能器 21位于同一个平面或曲面上,并且每个超声治疗换能器 21所发射的 声束相互平行或交错, 使得所发射的声束为非聚焦声束。 超声治疗换能器 21 的作用是发射功率可调节的超声声束, 以实现消融位于动脉外膜的神经纤维。
如图 2和图 3所示, 超声治疗换能器 21为平面晶片, 并且至少两个超声 治疗换能器 21均位于同一平面上。 另外, 每个超声治疗换能器 21的长轴位于 同一直线上, 且每个超声治疗换能器 21均与导管本体 1的轴向相平行。
当超声治疗换能器 21为平面晶片时, 在进行消融时, 需要通过控制操控 手柄 4转动导管本体 1 , 进而带动超声治疗换能器 21进行单向旋转运动, 以 实现对神经进行角度可控的次圓周式消融。 超声治疗换能器组 2 中的包括至少两个超声治疗换能器 21 , 在本申请实 施例中, 如图 2和图 3所示, 超声治疗换能器 21的个数为三个, 并且相邻两 个超声治疗换能器 21之间的距离大于等于 lcm。
上述将相邻两个超声治疗换能器 21之间跨越的距离控制在大于等于 lcm, 这样, 当利用该超声消融导管进行消融治疗时, 相邻两个超声治疗换能器 21 在进行次圓周式消融后, 形成的相邻两个消融点之间的距离大于等于 lcm, 这 正是考虑到, 当神经断端超过 10 mm时这种自我修复功能几乎完全丧失, 进 而可以避免感神经纤维在术后可能自行修复而影响远期治疗效果的问题。
本申请实施例中,超声治疗换能器 21可以由 X线影像下可视的压电晶体, 并且在压电晶片的表面设置有 X线影像下可视的镀膜, 例如: 金、 铂等。 如图 2和图 3所示, 在本申请实施例中, 超声成像换能器组 3包括至少一 个超声成像换能器 31 , 超声成像换能器 31位于相邻两个超声治疗换能器 21 之间, 也就是说, 超声成像换能器 31的个数比超声治疗换能器 21的个数少一 个。 至少一个超声成像换能器 31位于同一个平面或曲面上, 并且每个超声治 疗换能器 21均位于相邻的超声成像换能器 31的成像范围内。超声成像换能器 31 的作用是提供动脉周围组织的凸阵式高频超声图像, 显示神经纤维的分布 情况并监测神经纤维在消融前后的图像对比,通过连接超声减影图像分析系统 可消靶区域周围组织对图像造成的干扰, 从而准确评估消融即刻效果。
如图 2和图 3所示, 当超声治疗换能器 21为平面晶片时, 超声成像换能 器 31可以为表面设置有弧形的条带状晶片,并且每个超声成像换能器 31的长 轴与超声治疗换能器 21的长轴相重合,即超声成像换能器 31与超声治疗换能 器 21位于一条直线上。
另外, 如图 4所示, 当超声治疗换能器 21为非闭合环周状晶片时, 超声 成像换能器 31还可以为环周状晶片,并且每个所述超声成像换能器 31的环周 状晶片的轴线与所述超声治疗换能器 21的非闭合环周状晶片的轴线相重合, 即超声成像换能器 31与超声治疗换能器 21位于同一曲面上。
如图 1所示, 操控手柄 4位于导管本体 1的近端, 操控手柄 4的作用是控 制导管本体 1进行单向旋转,进而带动设置在导管本体 1上的超声治疗换能器 21进行角度可控的次圓周式消融。
在本申请实施例中, 操控手柄 4内安装有弹簧片和楔形齿轮, 并且导管本 体通过楔形齿轮与所述操控手柄可转动连接, 另外, 弹簧片一端与操控手柄 4 相固定, 另一端与楔形齿轮相挤压, 用于避免楔形齿轮反向转动。
为了方便控制操控手柄 4的转动角度, 如图 1所示, 在操控手柄 4表面环 周还可以设置有用于确定导管本体转动角度的刻度盘 8。
为了更加方便和精确地控制操控手柄 4的转动角度,在操控手柄 4内还可 安装步进电机,通过连接脉冲信号源驱动楔形齿轮按设定的方向转动固定的角 度。
此外,为了方便对该消融导管进入人体腔室内的位置或在进行消融手术时 转动的角度进行定位, 如图 1-图 3所示, 该消融导管还可以设置有: 至少两个 显影标记 6。
至少两个显影标记 6的材料为在 X线影像下可视的材料, 并且至少两个 所述显影标记 6分别位于所述导管本体 1上, 且位于超声治疗换能器 21的两 端位置。
为了便于辅助操作人员了解超声消融导管在体内的位置以及旋转角度,在 本申请实施例中, 当所述超声治疗换能器 21 为平面晶片时, 所述显影标记 6 为半环形,并且所述显影标记 6的半环形的两端与所述平面晶片的两端相固定 这样在转动时, 操作人员可以根据显影标记 6 的形状来确定超声治疗换能器 21的位置。 由以上技术方案可见, 本申请实施例提供的该消融导管中, 在导管本体 1 的远端部分设置有超声治疗换能器和超声成像换能器,每个超声成像换能器位 于相邻两个超声治疗换能器之间,并且相邻两个超声治疗换能器之间跨越的距 离控制在大于等于 1cm 的范围, 这样在进行消融治疗时; 超声治疗换能器向 导管本体侧向式发射平行或交错的非聚焦声束, 转动导管本体, 就可以使得超 声治疗换能器在血管内进行轴向性旋转(0。 〜任意角度) 并译放能量, 对交 感神经纤维进行消融后, 可将神经纤维截断为互不相连续、 中间段完全离断的 节段, 并且由于超声治疗换能器声束覆盖距离( > l cm )进一步保证了完全离 断的神经纤维无法相互趋化和自行修复, 保证了去交感效果的稳定性。
同时, 本申请实施例提供的该消融导管在使用时, 其内设置片状超声换能 器通过次圓周 (小于 360° )旋转, 或非闭合环状超声换能器发射次圓周超声 束, 产生次圓周的神经消融(如四分之三象限或三分之二圓周)效果, 在达成 有效肾神经消融的同时, 有控制地保留部分交感神经束, 以保持机体基本的交 感代偿能力。 实施例二:
在上述实施例中, 由于超声治疗换能器 21为平面晶片时, 在进行消融时, 需要通过控制操控手柄 4转动导管本体 1 , 进而带动超声治疗换能器 21进行 环周运动, 以实现对神经进行环周式消融。 所在操作时, 需要操作人员需要实 时监控消融区域, 并且緩慢转动导管本体 1 , 这样就会增加操作人员的操作难 度, 并且对于操作人员的要求较高, 甚至会出现由于操作人员操作不当而影响 消融效果。
为了解决需要转动导管本体 1以进行次圓周式消融存在的问题,在本申请 其他实施例中, 如图 4所示, 超声治疗换能器 21为非闭合环周状晶片, 每个 超声治疗换能器 21 的非闭合环周状晶片的环周角度在 0。 〜360° , 并且至少 两个超声治疗换能器 21均位于同一曲面上。 另外, 每个非闭合环周状晶片的 轴线与导管本体 1的轴线相重合, 同时, 每个非闭合环状晶片的缺口相互同轴 或不同轴平行, 这样使得所有超声治疗换能器 21发射的声束均是相互平行的 或交错的覆盖肾交感神经分布范围。
本申请实施例中, 采用非闭合环周状晶片, 这样在进行消融时, 无需转动 导管本体 1即可以完成对神经的次圓周式消融,使得消融手术操作更加简单方 便。 另外, 在本申请其他实施例中, 当超声治疗换能器 21为非闭合环周状晶 片, 并且非闭合环周状晶片的环周角度小于 360。 时, 该超声消融导管还可以 包括: 多个独立超声成像换能器 7。
每个独立超声成像换能器 7位于一个超声治疗换能器 21的非闭合环周状 晶片的缺口位置, 独立超声成像换能器 7可以为平面结构, 也可以与非闭合环 周状晶片组成一个完整的环形。 设置独立超声成像换能器 7的目的是: 当利用超声成像换能器 21找到消 融区域后, 可以旋转导管本体 1 , 并利用独立超声成像换能器 7对待消融区域 进行扫描, 以便整体了解神经的分布位置等。
此外, 当所述超声治疗换能器 21 为非闭合环周状晶片时, 该导管本体 1 上设置的显影标记 6为还可以为片状。片状的显影标记 6可以位于非闭合环周 状晶片的缺口位置,并且显影标记的长轴与超声治疗换能器非闭合环周状晶片 缺口长轴相重合。
以上对本申请所提供的一种超声消融导管进行了详细介绍,本文中应用了 具体个例对本申请的原理及实施方式进行了阐述,以上实施例的说明只是用于 帮助理解本申请的方法及其核心思想; 同时, 对于本领域的一般技术人员, 依 据本申请的思想, 在具体实施方式及应用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对本申请的限制。
本说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是 与其他实施例的不同之处, 各个实施例之间相同相似部分互相参见即可。
需要说明的是, 在本文中, 诸如 "大于" 或 "超过" 或 "高于" 或 "小于" 或 "低于" 等之类的关系描述, 均可以理解为 "大于且不等于" 或 "小于且不 等于", 也可以理解为 "大于等于" 或 "小于等于", 而不一定要求或者暗示必 须为限定的或固有的一种情况。
另外, 在本文中, 诸如 "第一" 和 "第二" 等之类的关系术语仅仅用来将 一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些 实体或操作之间存在任何这种实际的关系或者顺序。而且,在本文中,术语"包 括"、 "包含"或者其任何其他变体意在涵盖非排他性的包含, 从而使得包括一 系列要素的过程、 方法、 物品或者设备不仅包括那些要素, 而且还包括没有明 确列出的其他要素, 或者是还包括为这种过程、 方法、 物品或者设备所固有的 要素。 在没有更多限制的情况下, 由语句 "包括一个 ... ... " 限定的要素, 并不 排除在包括所述要素的过程、 方法、 物品或者设备中还存在另外的相同要素。
需要说明的是,以上所述仅仅是本申请技术方案的一部分优选具体实施方 式, 使本领域技术人员能够充分理解或实现本申请, 而不是全部的实施例, 本 文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下,在其它实 施例中实现。 因此, 基于以上实施例, 对于本技术领域的普通技术人员来说, 在不脱离本申请原理, 不做出创造性劳动前提下, 还可以做出多种显而易见的 修改和润饰, 通过这些修改和润饰所获得的所有其他实施例, 都可以应用于本 申请技术方案, 这些都不影响本申请的实现, 都应当属于本申请的保护范围。 因此, 本申请将不会被限制于本文所示的这些实施例, 而是要符合与本文所公 开的原理和新颖特点相一致的最宽的范围。

Claims

权 利 要 求
1、 一种超声消融导管, 其特征在于, 包括: 导管本体、 超声治疗换能器 组、 超声成像换能器组、 操控手柄和换能器接口, 其中:
所述导管本体为圓柱状结构;
所述超声治疗换能器组设置在所述导管本体远端的侧面上,所述超声治疗 换能器组包括至少两个超声治疗换能器,并且相邻两个超声治疗换能器之间的 距离大于或等于 1厘米;
所述超声成像换能器组包括至少一个超声成像换能器,并且所述超声成像 换能器位于相邻两个超声治疗换能器之间;
所述操控手柄设置在所述导管本体的近端;
所述换能器接口包括:与所述超声治疗换能器组相连接的第一接口和与所 述超声成像换能器相连的第二接口。
2、 根据权利要求 1所述的超声消融导管, 其特征在于, 所述超声治疗换 能器为平面晶片或非闭合环周状晶片。
3、 根据权利要求 2所述的超声消融导管, 其特征在于, 所述非闭合环周 状换能器晶片的环周角度在 0° 〜360。 。
4、 根据权利要求 3所述的超声消融导管, 其特征在于,
至少两个所述超声治疗换能器位于同一平面或曲面上,并且每个超声治疗 换能器发射的声束相互平行或交错;
所述非闭合环状超声换能器的至少两个换能器发射声束的缺失部分可相 互平行或交错。
5、 根据权利要求 4所述的超声消融导管, 其特征在于,
若所述超声治疗换能器为平面晶片,每个所述超声治疗换能器的长轴位于 同一直线上, 并且每个所述超声治疗换能器均与所述导管本体的轴线相平行; 若所述超声治疗换能器为非闭合环周状晶片,每个所述超声治疗换能器非 闭合环形晶片的轴线与所述导管本体的轴线相重合。
6、 根据权利要求 5所述的超声消融导管, 其特征在于, 当所述非闭合环 周状晶片的环周角度小于 360。 时, 该超声消融导管还可以包括: 至少一个独立超声成像换能器, 所述独立超声成像换能器的形状为条形, 并且所述独立超声成像换能器安装在所述非闭合环周状晶片的缺口处。
7、 根据权利要求 6所述的超声消融导管, 其特征在于,
所述的超声治疗换能器为 X线影像下可视的压电晶体, 并且所述压电晶 体的表面设置有 X线影像下可视的镀膜。
8、 根据权利要求 7所述的超声消融导管, 其特征在于, 所述超声成像换 能器安装在相邻两个超声治疗换能器之间,并且所述的超声成像换能器为表面 设置有弧形的条带状晶片或环周状晶片,每个超声治疗换能器的声束均位于相 邻的超声成像换能器的成像范围内。
9、 根据权利要求 8所述的超声消融导管, 其特征在于,
若所述超声治疗换能器为平面晶片,则所述超声成像换能器为表面呈弧形 的条带状晶片,并且每个超声成像换能器的长轴与所述超声治疗换能器的长轴 相重合;
若所述超声治疗换能器为非闭合环周状晶片,则所述超声成像换能器为环 周状晶片,并且每个所述超声成像换能器的环周状晶片的轴线与所述超声治疗 换能器的非闭合环周状晶片的轴线相重合。
10、 根据权利要求 9所述的超声消融导管, 其特征在于, 所述操控手柄用 于控制所述导管本体进行单向旋转;
所述操控手柄内安装有弹簧片和楔形齿轮,所述导管本体通过楔形齿轮与 所述操控手柄可转动连接;
所述弹簧片一端与所述操控手柄相固定, 另一端与楔形齿轮相挤压, 用于 避免楔形齿轮反向转动。
11、 根据权利要求 10所述的超声消融导管, 其特征在于, 所述操控手柄 表面环周设置有用于确定导管本体转动角度的刻度盘。
12、 根据权利要求 11所述超声消融导管, 其特征在于, 进一步包括: 至 少两个在 X线影像下可视的显影标记,
所述显影标记用于辅助操作人员了解超声消融导管在体内的位置以及旋 转角度;
至少两个所述显影标记分别位于所述导管本体上所述超声治疗换能器两 端位置,
当所述超声治疗换能器为平面晶片时, 所述显影标记为半环形, 并且所述 显影标记的半环形的两端与所述平面晶片的两端相固定;
当所述超声治疗换能器为非闭合环周状晶片时, 所述显影标记为片状。
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CN103330578B (zh) 2015-05-27
EP3017770A1 (en) 2016-05-11

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