Medical Technologist Test Medical Technologist Knowledge 3

Question 1

Which blood component is separated by centrifugation to yield a product used for treating thrombocytopenia?

Accepted Answer

Platelet concentrate

Answer

Platelet concentrate is obtained by centrifugation of whole blood and is transfused to treat thrombocytopenia or platelet dysfunction.

Question 2

In hemoglobin electrophoresis at alkaline pH, which hemoglobin migrates to the same position as HbS?

Accepted Answer

HbD

Answer

HbD co-migrates with HbS at alkaline pH, so acid electrophoresis or HPLC is needed to distinguish them.

Question 3

A reagent strip leukocyte esterase test is positive but the microscopic exam shows no WBCs. The most likely explanation is:

Accepted Answer

Contamination with vaginal secretions

Answer

Vaginal secretions can contribute leukocyte esterase activity, causing a false-positive result without true pyuria.

Question 4

The INR (International Normalized Ratio) is calculated to standardize which coagulation test?

Accepted Answer

Prothrombin time (PT)

Answer

INR normalizes the PT using the International Sensitivity Index (ISI) of the thromboplastin reagent used.

Question 5

Which organism is associated with urease production, is a common cause of peptic ulcers, and requires special culture conditions?

Accepted Answer

Helicobacter pylori

Answer

Helicobacter pylori produces urease and requires microaerophilic conditions and extended incubation (3–7 days) for culture.

Medical Technologist Test Practice Test