研究：坐过山车能排出肾结石？_公共英语阅读理解

研究：坐过山车能排出肾结石？

Using a 3-D printed model of that patient’s kidney, Wartinger and his colleagues implanted three kidney stones of various sizes into the upper, middle or lower passageways of the clear silicone model. Two of those mineral clusters, which can form as the kidney filters waste from the bloodstream, were small-to-moderate size — 4.5 millmeters and 13.5 mm. Those might pass through the duct leading to the bladder without incident but could also cause considerable pain and discomfort as they passed unaided. But a third measured 64.6 mm, a size that would rarely pass without treatment — the administration of ultrasound shock waves, called lithotripsy, designed to break up the deposit and allow it to pass.

沃汀格尔和同事用3D打印机制造了这位患者肾脏的透明硅胶模型，并把三个大小不一的肾结石放入模型上中下的管道中。肾结石是肾脏在过滤血流垃圾时形成的矿物质群。其中两颗结石小的4.5mm，

中等大小的13.5mm。这等大小的结石在经由尿管向膀胱自然移动时，可以平安无事，但也能引起剧痛和不适感。第三颗结石64.6mm大，这种大小的结石只有借助超声冲击波治疗，也即碎石术打碎结石，才能排出体外。

The researchers received permission from Walt Disney World first, then concealed the kidney model in a backpack and rode Big Thunder 20 times, varying their seat position between front and back.