Answered: You are working in a cardiac unit and…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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You are working in a cardiac unit and are tasked to determine the percentage of blockage in a patients carotid artery. For this patient, you know the average blood velocity for a non blocked artery is 30 cm/s. Using the Dopper Ultrasound, you measure the blood velocity in your patient to be 90 cm/s at the fastest position along the carotid artery. About what percent of the patient’s artery is blocked? Note: In this procedure, the patient is lying flat, meaning there is no change in height of the artery. Hint: Suppose A2/A1=1/5 (for example) where A2 is the cross sectional area of the blockage and A1 is the area outside the blockage. This would mean that the blockage leaves only 20% (0.2) of the artery open. Or, that the artery itself is 100%-20%=80% blocked.

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