In the ED, blood is withdrawn from the vein and into a test tube. The packed cell volume (RBCs) is 1.45 ml, and the plasma volume is 3.55 ml. Calculate Maggie's hematocrit in the ED. CHEGG

Question

Biology

Deborah Waller

11 May, 17:05

In the ED, blood is withdrawn from the vein and into a test tube. The packed cell volume (RBCs) is 1.45 ml, and the plasma volume is 3.55 ml. Calculate Maggie's hematocrit in the ED. CHEGG

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Answers (1)

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Ricardo Franco · Answer 1

1.45 + 3.55 = 5.0 (total blood volume); 1.45/5.0 * 100 = 29% (low),

Explanation:

HCT is calculated as:

HCT = Volume of red blood cells / (Volume of red blood cells + volume of plasma) x 100

1.45 + 3.55 = 5.0 (total blood volume); 1.45/5.0 * 100 = 29% (low), normal range for an adult female HCT ranges from 38 to 46% (some sources claim 34.9-44.5%).

*for calculating this, one must know two of these three values: packed cell volume, total blood volume, plasma volume.

Total blood volume = Packed cell volume + plasma volume.