VOA常速英语2019--3D打印技术可大幅提高心脏手术安全性（在线收听）

University of Washington doctors are seen here doing heart surgeries using catheters. These long tubes reaching into the heart allow doctors to perform non-invasive heart surgery. Doctor Mark Reisman is better at it now when he gets to practice by using an exact 3D model of this heart created by 3D printers using ultra-sound scans. So with this allows us to do, the 3D prints allow us to physically see the heart, and then to understand the nuances of the anatomy, the anatomy itself but also how the anatomy within the heart is related to other structures.

有人看到，华盛顿大学的几名医生在用导管做心脏手术。这些长管伸向心脏，让医生们可以做无创心脏手术。马克·赖斯曼是一名医生，他现在更加擅长做心脏手术了，因为他可以通过心脏的精密3D模型来进行演练。这种模型是3D打印机用超声波扫描构建的。有了模型的助力，3D打印技术让我们可以看到心脏的情况，从而了解解剖过程会遇到哪些困难；同时，也可以了解心脏内部的解剖与其他结构之间的关系。

Dmitry Levin fits ultra-sound data into a 3D printer that creates a model accurately and quickly. One of the huge advantages is it turnaround time. So the time between the data set and what I deliver the model could be cut down tremendously into hours instead of days. Quick turnaround allows Reisman to plan his surgery in ways he’s never been able to before.

德米特里·莱文将超音频数据放入3D打印机之后，打印机就能精准迅速地构建出模型。这种做法的一个巨大优势就是节省时间。在得到数据集之后与导出模型之间的时间可以极大减少为几小时，而非数天。时间上的缩短让赖斯曼可以为手术编排计划，这是以前从未有过的。

In the types of procedures that I do, I think what it does is it gives me an opportunity to rehearse the procedure beforehand which is very very powerful, because it’s supposed to mean doing these procedures and engaging the various valve for the first time when I’m doing a lot of patients. I could actually practice that outside of the patient. Recent studies show that most aortic valve surgeries are done by a catheter than more dangerous open-heart surgery.

我所做的这类流程，我认为它让我可以事先演练，这是非常强大的特性。这就意味着，我通过这些流程来接触从未做过的各种瓣膜，从而服务于广大患者。我其实可以在没有病人的情况下完成演练。最近有多项研究表明，大多数主动脉瓣手术是通过导管完成的，而非危险性更高的开胸手术。