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The Medi-Stim VeriQ System is an intraoperative diagnostic system that utilizes ultrasonography to guide surgeons to successfully plan and accomplish surgical interventions. The clinical indications for the device are: - Accurate transit time blood volume and Doppler velocity flow measurements during cardiovascular-, vascular-, transplantation- and neuro-surgery. - Simultaneous measurements of blood pressure, vascular resistance, interfaced physiological signals and other derived parameters during these procedures. - Detection of normal and abnormal blood volume and Doppler velocity flow patterns during these procedures. - Provides guidance to prepare surgical plans at the initiation of surgery and to support the successful accomplishment of surgery including detection and location of vessels during surgical procedures. - Detection and quantification of the degree of stenosis in arteries by using the Doppler velocity profile.

The Medi-Stim VeriQ System is used intraoperatively to measure blood volume and velocity waveforms in arteries and veins. Transit time and Doppler ultrasonography is used to obtain these measurements.

It is intended for accurate transit time blood volume flow measurements during cardiovascular, vascular and transplantation surgery.

The Medi-Stim Butterfly Flowmeter estimates blood volume flow by measuring the transit time difference between an ultrasonic signal propagated through a blood vessel in the downstream direction and one propagated in the upstream direction. The measuring unit consists of two ultrasonic transducers on one side of the vessel aimed at a common point on a flat reflector on the other side of the vessel.