NURSING ANM AND GNM

NURSING EXAM QUESTIONS

HOSPITAL CLINICAL PHARMACY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A fast way to determine the percentage of RBCs in the plasma
A
Hemoglobin
B
Mean corpuscular hemoglobin
C
Hematocrit
D
Erythrocyte sedimentation rate
Explanation: 

Detailed explanation-1: -A simple equation to calculate the hematocrit percent is to multiply the RBC count (in cells/L) by the MCV (in fL). Sample calculation for an RBC count of 4.68 × 1012/L and an MCV of 84.8 fL: Hematocrit = 4.68 × 10 12 / L × 84.8 × 10 – 15 L = 0.397 L / L ( or 39.7 % ) .

Detailed explanation-2: -The hematocrit is a ratio of the packed cells to total volume. Example: If the column of packed red cells measures 20 mm and the whole blood column measures 50 mm, the hematocrit is 20/50 = 0.4 or (0.4 × 100%) = 40%.

Detailed explanation-3: -HCT calculation is by dividing the lengths of the packed RBC layer by the length of total cells and plasma. As it is a ratio, it doesn’t have any unit.

Detailed explanation-4: -Hematocrit is the percentage by volume of red cells in your blood. Blood is made up of red blood cells, white blood cells and platelets, suspended in plasma. Together, those comprise about 45% of the volume of our blood, but the specific percentages of each can vary.

Detailed explanation-5: -HCT = (RBC x MCV)/10. Mean corpuscular volume (MCV) is the average volume (size) of the patient’s RBCs. HCT is part of the complete blood cell count and indirectly measures the RBC mass. The results are expressed as the percentage by volume of packed RBCs in whole blood (PCV).

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