Sonja is 28 years old and weighs 132 lb (2.2 lb = 1 kg). Calculate the following values for her, assuming she is an average healthy adult.
A. What is her approximate blood volume?
B. What is her approximate plasma volume?
C. Assuming a normal hematocrit, what is her volume of cellular elements?
D. What is her typical RBC count?
E. WBC?
F. Differential count?
G. Platelets?
H. What hemoglobin level would you expect to find?
A. 132 lbs = 60 kg. Blood volume is approximately 7% of body weight:
60 kg × 0.07 = 4.2 kg = 4.2 L.
B. If her hematocrit were 40%, then her plasma volume = 60% of her blood volume
= 0.6 × 4.2 = 2.5 L. Normal hematocrits may range from 37% to 47% in females.
C. With a hematocrit of 40%, her packed cell volume would be 1.6 L.
D. Values are found in Figure 16.3: RBC count = 3.9 to 5.6 × 10 6.
E. WBC = 4,000 - 11,000.
F. Ranges of normal are presented in Figure 16.3.
G. Platelets = 200,000 - 500,000.
H. Hemoglobin = 12 to 16 g/dL blood.
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