A patient has a red cell count of 4.0 million per microliter, a hemoglobin of 9.0 g per deciliter, and a hematocrit of 30 percent. What is the mean corpuscular volume?
175 fL✓ 정답
260 fL
390 fL
4100 fL
해설
Mean corpuscular volume equals hematocrit divided by the red cell count, multiplied by 10. Thirty divided by 4.0 is 7.5, and multiplying by 10 gives 75 fL. Because this is below 80, the anemia is microcytic. Always classify the value after calculating it.