Medical Technologist Test Medical Technologist General Information 4

Question 1

A systematic error in laboratory testing is best characterized by:

Accepted Answer

Consistent bias in one direction affecting accuracy

Answer

Systematic errors cause a consistent directional shift (positive or negative bias) in results, affecting accuracy without necessarily changing precision.

Question 2

Which specimen type is preferred for measuring ionized calcium?

Accepted Answer

Plasma collected in heparin tube analyzed immediately

Answer

Heparinized plasma is preferred for ionized calcium because EDTA and citrate chelate calcium, and the specimen must be analyzed immediately to prevent pH shifts.

Question 3

Delta checks in the laboratory are used to:

Accepted Answer

Compare a patient's current result with their previous result to detect errors

Answer

Delta checks compare a patient's current result to their previous result; a large unexpected change flags potential specimen identification errors or acute clinical events.

Question 4

The reference interval (reference range) for a laboratory test is typically established using results from:

Accepted Answer

95% of results from a healthy reference population

Answer

Reference intervals are defined as the central 95th percentile of results from a carefully selected healthy reference population, meaning 2.5% fall above and below.

Question 5

Which type of pipette is most precise for delivering an exact volume in laboratory procedures?

Accepted Answer

Volumetric (transfer) pipette

Answer

Volumetric (transfer) pipettes are calibrated to deliver a single exact volume with the highest accuracy, indicated by a single graduation mark.

Medical Technologist Test Practice Test

Medical Technologist Test Practice Test

Medical Technologist Test Medical Technologist General Information 4