NRCME Urinalysis and Renal Disorders 5

Question 1

A CMV driver is found to have orthostatic proteinuria. The appropriate NRCME action is:

Accepted Answer

Certify normally; orthostatic proteinuria is a benign condition

Answer

Orthostatic proteinuria is a benign condition in young individuals where protein appears in urine only in the upright position and carries no cardiovascular or renal risk.

Question 2

A driver's urine dipstick is positive for nitrites. This finding MOST specifically suggests:

Accepted Answer

Gram-negative bacterial urinary tract infection

Answer

Nitrites are produced by gram-negative bacteria that convert urinary nitrates to nitrites, making this finding highly specific for gram-negative UTI.

Question 3

Which medication commonly used by CMV drivers can cause FALSE-POSITIVE urine glucose on dipstick testing?

Accepted Answer

High-dose vitamin C (ascorbic acid)

Answer

High-dose vitamin C can interfere with the glucose oxidase reaction on dipstick, causing false-negative results for glucose (and false results for other analytes).

Question 4

A dialysis-dependent driver applies for a DOT medical certificate. Under FMCSA standards, this driver is:

Accepted Answer

Disqualified from interstate commerce

Answer

FMCSA regulations disqualify drivers who are on dialysis from operating CMVs in interstate commerce due to the unpredictability of uremic complications and treatment schedules.

Question 5

A urine dipstick shows bilirubin positive and urobilinogen elevated. This pattern is MOST consistent with:

Accepted Answer

Hepatocellular disease (hepatitis/cirrhosis)

Answer

Both conjugated bilirubin (filtered by kidneys) and urobilinogen are elevated in hepatocellular disease because the liver cannot clear urobilinogen reabsorbed from the gut.

NRCME - National Registry of Certified Medical Examiners Practice Test

NRCME - National Registry of Certified Medical Examiners Practice Test

NRCME Urinalysis and Renal Disorders 5