A 32-year-old patient has the following CBC results:
RBC count: 4.2 × 10%L Hemoglobin: 12.0 g/dL
Hematocrit: 32%
MCV: 76 fL
RDW: Elevated
Given these values, which interpretation best explains the discrepancy based on the Rule of Three?
A. The values are internally consistent; no further investigation necessary.
B. The hematocrit is lower than expected, suggesting microcytosis affecting the rule’s validity.
C. The hemoglobin is falsely decreased due to lipemia interference,
D. The RBC count is spuriously increased due to cold agglutinins.
B. The hematocrit is lower than expected, suggesting microcytosis affecting the rule’s validity.
A 22-year-old female comes in for a routine check-up. Her
CBC shows the following results:
RBC count: 3.80 x 10%/pL
Hemoglobin: 9.5 g/dL
Hematocrit: 29%
Compute the following RBC indices (show your solutions):
a. MCV (IL)
b. MCH (pg)
c. MCHC (g/dL)
Based on the RBC indices, classify the anemia (normocytic/normochromic, microcytic/hypochromic, etc.).
The Coulter principle for counting of cells Is based on the fact that:
A. Isotonic solutions conduct electricity better than cells do
B. Conductivity varies proportionally to the number of cells
C. Cells conduct electricity better than saline does
D. Isotonic solutions cannot conduct electricity
A. Isotonic solutions conduct electricity better than cells do
Side angle scatter in a laser-based cell counting system Is used to measure
A. Cell size
B. Cytoplasmic granularity
C. Cell number
D. Immunologic (antigenic) identification
B. Cytoplasmic granularity
Using an electronic cell counter, analyzer, an Increased RDW should correlate with:
A. Spherocytosis
B. Anisocytosis
C. Leukocytosis
D. Presence of NRBCs
B. Anisocytosis
A patient peripheral blood film demonstrates agglutinated RBCs, and the CBC shows an elevated MCHC. What other parameters will be affected by the agglutination of the RBCs?
a. MCV will be decreased and the RBC count will be increased
b. MCV will be decreased and the RBC count will be decreased
c. MCV will be increased and the RBC count will be dec
d. MCV will be increased and the RBC count will be inc
c. MCV will be increased and the RBC count will be dec
