108年:(醫檢)血液(1)

某女性受檢者之⾎液檢體測得紅⾎球 佔⾎液體積 33% ,紅⾎球數⽬ 3.3×10 6/μL,⾎⾊素 11g/dL ,下列敘述何者錯誤?

AMCV=100fL
BMCHC=33.3%
CMCH=150pg
D可能有貧⾎症狀

詳細解析

本題觀念:

本題為反向題(問「何者錯誤」),考核紅血球指數(RBC indices)的計算公式。給定數據:血比容(hematocrit, Hct)= 33%,紅血球數(RBC)= 3.3×10⁶/μL,血色素(hemoglobin, Hgb)= 11 g/dL,需逐一驗算 MCV、MCHC、MCH。

選項分析

計算公式:

MCV (fL)=Hct (%)×10RBC (×106/μL)\text{MCV (fL)} = \frac{\text{Hct (\%)} \times 10}{\text{RBC (×10}^6/\mu\text{L)}}

MCH (pg)=Hgb (g/dL)×10RBC (×106/μL)\text{MCH (pg)} = \frac{\text{Hgb (g/dL)} \times 10}{\text{RBC (×10}^6/\mu\text{L)}}

MCHC (g/dL)=Hgb (g/dL)Hct (%)×100\text{MCHC (g/dL)} = \frac{\text{Hgb (g/dL)}}{\text{Hct (\%)}} \times 100

代入數值:

MCV=33×103.3=3303.3=100 fL\text{MCV} = \frac{33 \times 10}{3.3} = \frac{330}{3.3} = 100 \text{ fL}

MCHC=1133×100=33.3 g/dL\text{MCHC} = \frac{11}{33} \times 100 = 33.3 \text{ g/dL}

...(解析預覽)...