CN105769338A - 一种用于肝癌介入治疗的微波消融针 - Google Patents

一种用于肝癌介入治疗的微波消融针 Download PDF

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CN105769338A
CN105769338A CN201610216168.5A CN201610216168A CN105769338A CN 105769338 A CN105769338 A CN 105769338A CN 201610216168 A CN201610216168 A CN 201610216168A CN 105769338 A CN105769338 A CN 105769338A
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outer conductor
coaxial
coaxial outer
shank
insulation sleeve
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周永金
马成
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/1815Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00529Liver
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/1815Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
    • A61B2018/183Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves characterised by the type of antenna
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/1815Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
    • A61B2018/1869Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles

Abstract

本发明涉及一种用于肝癌介入治疗的微波消融针,包括匹配绝缘套、辐射天线、同轴线内导体、同轴线外导体、扼流环、针杆、手柄,所述匹配绝缘套的前端采用全封闭形式,且包含穿刺用的针尖结构;所述同轴线内导体与所述同轴线外导体设置于匹配绝缘套内部,所述同轴线内导体与同轴线外导体的端部焊接连接,在同轴线外导体的前端附近开有两个环形槽,形成辐射天线;所述扼流环与匹配绝缘套固定连接,扼流环与同轴线外导体之间密封焊接;所述匹配绝缘套与针杆固定连接,所述针杆与手柄固定。本发明微波消融针结构巧妙,易于加工,其特制有扼流环与双槽天线相结合,可确保天线的消融范围更大、更圆。

Description

一种用于肝癌介入治疗的微波消融针
技术领域
本发明涉及一种用于肝癌介入治疗的微波消融针。
背景技术
微波消融治疗是在影像引导下,微波消融针经皮穿刺到肿瘤病灶部位,微波消融治疗仪发射的微波能量经传输线传送到消融针并辐射到肿瘤病灶组织,在微波作用下极性分子振荡、摩擦产生的局部高热容易被滞留在肿瘤组织内,当温度达60~100℃时可即刻产生蛋白质凝固,细胞溶质酶、线粒体酶的核酸形成凝固坏死,最终使肿瘤组织凝固坏死,以达到治疗的目的。
我国于1998年开始应用微波技术治疗肝癌,经过十多年的发展,我国在应用微波热凝固技术治疗肝癌方面已居世界领先地位。从实验研究到临床应用的十多年时间,微波热消融治疗肿瘤己显现出该项技术的明显优势:微创(仅需破皮2~3mm)、安全、消融热效率高、升温速度快、高温热场分布均匀、肿瘤区坏死彻底,对正常组织损伤小,无化疗、放疗的毒副作用,并能激活增强机体的抗肿瘤免疫等突出优点。
现有的消融天线均为单发射窗结构,可用于肝癌等肿瘤的治疗。但由于受到消融直径的限制,其无法适应大肝癌的消融治疗,并且传统消融天线的消融范围呈较明显的椭球形,不利于治疗医师的手术控制。
发明内容
本发明针对现有技术存在的不足,提出一种用于肝癌介入治疗的微波消融针,能够实现更大更圆的消融半径。
为达到上述目的,本发明才有如下技术方案:
一种用于肝癌介入治疗的微波消融针,包括匹配绝缘套、辐射天线、同轴线内导体、同轴线外导体、扼流环、针杆、手柄,所述匹配绝缘套的前端采用全封闭形式,且包含穿刺用的针尖结构;所述同轴线内导体与所述同轴线外导体设置于匹配绝缘套内部,所述同轴线内导体与同轴线外导体的端部焊接连接,在同轴线外导体的前端附近开有两个环形槽,形成辐射天线;所述扼流环与匹配绝缘套固定连接,扼流环与同轴线外导体之间密封焊接;所述匹配绝缘套与针杆固定连接,所述针杆与手柄固定。
与现有技术相比,本发明具有如下优点:
本发明消融针采用高强度、韧性好、低损耗、高介电常数的陶瓷作为针头和针杆之间的阻抗匹配和绝缘材料,提高了消融针针头的强度,避免临床穿刺针头弯曲和断针的现象。本发明消融针特制有两个环形槽开于同轴线外导体上,能够实现只在天线尖端部分产生局部加热,且可以使消融范围更圆更大。其特制有的扼流环与加粗的同轴线外导体短路,可以有助于将加热模式限制在天线的远端,从而减少沿天线轴向后加热。
附图说明
图1是本发明微波消融针的前端部分剖视图。
图2是本发明微波消融针的整体结构示意图。
具体实施方式
下面结合附图和具体实施方式对本发明作进一步的详细描述。
如图1图2所示,一种用于肝癌介入治疗的微波消融针,包括匹配绝缘套1、辐射天线2、同轴线内导体4、同轴线外导体5、扼流环6、针杆7、手柄8,所述匹配绝缘套1的前端采用全封闭形式,且包含穿刺用的针尖结构;所述同轴线内导体4与所述同轴线外导体5设置于匹配绝缘套1内部,所述同轴线内导体4与同轴线外导体5的端部焊接连接,在同轴线外导体5的前端附近开有两个环形槽3,形成辐射天线2;所述扼流环6与匹配绝缘套1固定连接,扼流环6与同轴线外导体5之间密封焊接;所述匹配绝缘套1与针杆7固定连接,所述针杆7与手柄8固定。
通过在同轴线外导体5上开有两个环形槽3形成辐射天线2,微波功率信号通过同轴线传输到辐射天线2,再由辐射天线2辐射到肿瘤病灶处,匹配绝缘套1在辐射天线2与扼流环6以及针杆7之间起到阻抗匹配和电器绝缘的作用。
本实施例的匹配绝缘套1采用前端全封闭的结构,包括穿刺的针尖部位,如图1所示,针尖采用圆锥形,本实施例中的辐射天线2在匹配绝缘套1内孔中,通过匹配绝缘套1与治疗组织相隔离,充分降低了消融时组织的焦化程度扩大消融范围。匹配绝缘套1采用耐高温的无机陶瓷材料,消融针不仅要强度高,而且还要韧度好,可以采用氧化锆作为匹配绝缘套的材料。匹配绝缘套2和针杆7连接处的T型台阶采用R型圆角过渡结构,可以提高T型台阶的强度。本发明还采用了在同轴线外导体5开两个环形槽3与在同轴线外导体5上焊接一个扼流环6相结合,不仅能够使得消融范围更圆更大,同时还能使辐射天线2的发射系数不受插入组织的深度的影响。

Claims (1)

1.一种用于肝癌介入治疗的微波消融针,其特征在于,包括匹配绝缘套(1)、辐射天线(2)、同轴线内导体(4)、同轴线外导体(5)、扼流环(6)、针杆(7)、手柄(8),所述匹配绝缘套(1)的前端采用全封闭形式,且包含穿刺用的针尖结构;所述同轴线内导体(4)与所述同轴线外导体(5)设置于匹配绝缘套(1)内部,所述同轴线内导体(4)与同轴线外导体(5)的端部焊接连接,在同轴线外导体(5)的前端附近开有两个环形槽(3),形成辐射天线(2);所述扼流环(6)与匹配绝缘套(1)固定连接,扼流环(6)与同轴线外导体(5)之间密封焊接;所述匹配绝缘套(1)与针杆(7)固定连接,所述针杆(7)与手柄(8)固定。
CN201610216168.5A 2016-04-11 2016-04-11 一种用于肝癌介入治疗的微波消融针 Pending CN105769338A (zh)

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CN106725842A (zh) * 2016-12-01 2017-05-31 北京恒福思特科技发展有限责任公司 一种微波消融针
CN107753104A (zh) * 2017-12-01 2018-03-06 中国科学技术大学 一种磁兼容的水冷微波消融针及其制备方法
CN107865691A (zh) * 2017-11-22 2018-04-03 安徽硕金医疗设备有限公司 一种磁共振兼容的水冷微波消融针
EP3745975A4 (en) * 2018-02-02 2021-11-03 Varian Medical Systems, Inc. MICROWAVE ABLATION ANTENNAS

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EP2353645A1 (en) * 2010-02-05 2011-08-10 Vivant Medical, Inc. Electrosurgical devices with choke shorted to biological tissue
CN105361949A (zh) * 2011-05-31 2016-03-02 柯惠有限合伙公司 改进的湿性尖部天线设计
CN202386782U (zh) * 2011-12-13 2012-08-22 南京理工大学 同轴缝隙带扼流环的微波热疗天线
CN104185454A (zh) * 2012-02-17 2014-12-03 H.S.-医院服务股份公司 用于组织消融的微波装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106725842A (zh) * 2016-12-01 2017-05-31 北京恒福思特科技发展有限责任公司 一种微波消融针
CN106725842B (zh) * 2016-12-01 2024-04-05 北京恒福思特科技发展有限责任公司 一种微波消融针
CN107865691A (zh) * 2017-11-22 2018-04-03 安徽硕金医疗设备有限公司 一种磁共振兼容的水冷微波消融针
CN107753104A (zh) * 2017-12-01 2018-03-06 中国科学技术大学 一种磁兼容的水冷微波消融针及其制备方法
EP3745975A4 (en) * 2018-02-02 2021-11-03 Varian Medical Systems, Inc. MICROWAVE ABLATION ANTENNAS

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Application publication date: 20160720