Which of the following computations is used to calculate cardiac output?
A. Cardiac Output = Heart Rate * Stroke Volume
B. Cardiac Output = Heart Rate + Stroke Volume
C. Cardiac Output = Heart Rate / Stroke Volume
D. Cardiac Output = Heart Rate - Stroke Volume
Answer: A
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In order to maintain adequate perfusion to the vital organs of the body a mean arterial pressure (MAP) of 60 mmHg must be maintained. MAP is a calculation of average blood pressure using systolic and diastolic blood pressure measurements. MAP is calculated as follows:
A) MAP = DBP + (SBP–DBP)/3 B) MAP = SBP + (SBP–DBP)/2 C) MAP = DBP + (SBP–DBP)/2 D) MAP = SBP + (SBP–DBP)/3
In the center square on one side of a hemocytometer, 100 platelets were found; 200 were found in the center square on the other side. Select the best course of action
a. Report the count as 150 ´ 109/L. b. Verify the count by estimating the platelet number on the blood film. c. Recount the hemocytometer on a phase microscope. d. Repeat the procedure—the two counts are not close enough.