Medical Technologist Test Analyzing Medical Technologist 3

Question 1

Which enzyme is MOST elevated in acute myocardial infarction and remains elevated for up to 14 days?

Accepted Answer

LDH

Answer

LDH (particularly LD1 isoenzyme) remains elevated for 10–14 days post-infarction, making it useful for late diagnosis.

Question 2

A CSF sample shows xanthochromia. What condition does this MOST suggest?

Accepted Answer

Subarachnoid hemorrhage

Answer

Xanthochromia (yellow discoloration) results from RBC lysis releasing oxyhemoglobin and bilirubin after subarachnoid hemorrhage.

Question 3

Which quality control rule indicates a systematic error in an analytical run?

Accepted Answer

2-2s rule on the same side

Answer

The 2-2s rule triggered by consecutive QC values on the same side of the mean indicates a systematic shift or bias.

Question 4

Schistocytes on a peripheral blood smear combined with thrombocytopenia and elevated creatinine MOST suggest:

Accepted Answer

TTP/HUS

Answer

The triad of microangiopathic hemolytic anemia (schistocytes), thrombocytopenia, and renal involvement defines TTP/HUS.

Question 5

Which organism causes a characteristic 'safety pin' bipolar staining on Gram stain and is associated with plague?

Accepted Answer

Yersinia pestis

Answer

Yersinia pestis displays bipolar (safety-pin) staining with Wayson or Giemsa stain and is the causative agent of plague.

Medical Technologist Test Practice Test