There is a newer device using ultrasound as a bedsidetest with ultrasonic waves in a test tube which is being studied.
有一种新型设备正在进行研究，就是在床旁通过检测管应用超声波检测凝血功能。
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The test takes 15 minutes and can be carried out almost anywhere, from a hospital bedside to an outpatient clinic, with the patient either sitting or lying down.