A patient had the following results:
RBC 2.45 x 1012/L
MCV 90 fL
Hb 7.5 g/dL
MCH 31 pg
Hct 22.0 %
MCHC 34 g/dL
DAT negative
Haptoglobin 10 mg/dL
(Reference range: 35-164 for males and 40-175 for females)
Which is the most appropriate reflex test?
a. Reticulocyte count
b. Hemoglobin electrophoresis
c. Osmotic fragility test
d. Erythropoietin assay
Correct Answer: A
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The most common hypersensitivity reaction is:
a. Type I b. Type II c. Type III d. Type IV
What impact does the steep portion of the oxyhemoglobin dissociation curve have on oxygen delivery?
A. No oxygen can be released to tissues until PO2s are above 60 mm Hg B. PO2s below 60 prevents the release of oxygen from hemoglobin to tissues C. Oxygen binds irreversibly with hemoglobin until the P50 is reached D. PO2s below 60 enhance the release of oxygen from hemoglobin to the tissues