A urea nitrogen result is falsely elevated and it was discovered that the previous sample on the sample carousel has abnormally high serum glucose. Which of the following can cause this error?
A) Pipetting an extra volume of diluents into the sample with the falsely elevated glucose
B) Carryover
C) A leak in the reagent-dispensing probe
D) Double pipetting of the sample with the elevated glucose result

Question

Quizplus · Accepted Answer

Carryover from the previous sample with abnormally high serum glucose can contaminate the subsequent sample, leading to a falsely elevated urea nitrogen result. This occurs when residue from one sample is inadvertently transferred to another.

A Urea Nitrogen Result Is Falsely Elevated and It Was