JACC:3D打印有助解决复杂结构左心耳封堵难题

2015-07-22 大鹏 译 医学论坛网

近期,澳大利亚医生利用3D打印技术成功复制了患者左心耳(LAA),通过这一步骤,医生更全面的掌握了患者LAA解剖学特征,从而完成接下来的Watchman左心耳封堵术。该病例报告见《美国心脏病学会杂志》(Journal of the American College of Cardiology: Cardiovascular Interventions)。 接受此项技术支持的是一位74岁高龄的

近期,澳大利亚医生利用3D打印技术成功复制了患者左心耳(LAA),通过这一步骤,医生更全面的掌握了患者LAA解剖学特征,从而完成接下来的Watchman左心耳封堵术。该病例报告见《美国心脏病学会杂志》(Journal of the American College of Cardiology: Cardiovascular Interventions)。

接受此项技术支持的是一位74岁高龄的男性患者,有阵发性心房颤动病史,不耐受口服抗凝治疗。研究者根据3D扫描获得数据,使用一种橡胶样物质打印3D模型,模拟患者的心房及LAA机械特性。

打印完成后,研究者分别使用21mm、24mm、及27mm的Watchman封堵器置于打印模型中。通过CT重扫,研究者很容易辨别每种型号封堵器在LAA内解剖形变情况。

有趣的是,术前经食道心动超声(TEE)显示21mm是合适的尺寸,而3D打印/CT重扫显示24mm更合适。最终选择24mm完成手术,且术中TEE显示该尺寸封堵器贴合理想,无渗漏情况。

3D打印的多种优势

自2015年Watchman左心耳封堵术得到批准以来,X线透视检查及TEE均以用于手术,而多层螺旋CT可以提供心脏的3D影像。研究者表示,虽然CT及TEE有快速定位的优势,但有了3D打印,医生将更了解封堵器的动向。

参与该手术的研究者表示,3D打印复刻患者LAA对于Watchman左心耳封堵术有重要的指导意义,尤其是当患者LAA解剖结构复杂,术者即便使用影像学手段也难以确定封堵器与患者LAA相互作用情况时。

研究者指出,闭合不全及心包积液是LAA封堵器尺寸异常时常见的不良预后。在3D打印/CT重扫时,研究者发现27mm封堵器会出现不完全膨胀的缺点,原因可能是一侧未展开“钩子”对LAA某一点施压过大,这会导致术后心包积液。3D打印技术避免了这一不良预后。

最后,研究者表示3D打印技术仅需30分钟就能完成,成本约在100至200美元(不含软件费用)。虽然一些LAA结构简单的患者不需要这种技术辅助,但将其推广至临床手术决策阶段肯定有不错的收益。

原始出处

Personalized 3D Printing of Heart Model Aids in LAA-Closure Procedure: Case Report  

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    2015-11-20 hbwxf
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    2015-08-06 hlycom3356

    对目前研究提供了极大帮助

    0

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    2015-08-01 Messichen1992

    厉害

    0

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    2015-07-24 jxrzshh

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