Urinalysis and Renal Disorders Flashcards
7 cards from real NRCME practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Urinalysis and Renal Disorders flashcards as text
A CMV driver has been diagnosed with Stage 3 chronic kidney disease (eGFR 30–59 mL/min/1.73m²) but is otherwise stable and asymptomatic. What is the most appropriate certification approach?
Answer: Evaluate overall functional status and consider shorter certification with monitoring
Stage 3 CKD does not automatically disqualify a driver; the examiner should assess functional capacity, symptom burden, and medications, and may issue a shorter-term certificate with specialist follow-up.
A commercial driver on maintenance hemodialysis for end-stage renal disease (ESRD) applies for a DOT medical certificate. Which of the following statements is most accurate?
Answer: ESRD requiring dialysis generally disqualifies a driver due to the unpredictable nature of the condition
ESRD requiring dialysis typically disqualifies a CMV driver because the condition causes fatigue, electrolyte imbalances, and unpredictable medical events incompatible with safe driving.
Which urinalysis finding is most consistent with a urinary tract infection (UTI) in a commercial driver during a DOT physical?
Answer: Positive nitrites and leukocyte esterase
Positive nitrites (indicating bacterial reduction) and leukocyte esterase (indicating white blood cells) are classic dipstick markers of a urinary tract infection.
A CMV driver taking an ACE inhibitor for proteinuric chronic kidney disease presents for his DOT physical. What is the medical examiner's primary concern regarding this medication?
Answer: The examiner must assess whether the drug causes hypotension or other side effects that impair driving
ACE inhibitors can cause hypotension, dizziness, and other side effects; the examiner must evaluate whether these effects impair the driver's ability to safely operate a CMV.
During a DOT physical, a urinalysis reveals bilirubin in the urine. What should the medical examiner suspect?
Answer: Hepatic or biliary disease affecting liver function
Bilirubinuria indicates that conjugated bilirubin is appearing in the urine, which suggests hepatic or biliary pathology such as hepatitis, cirrhosis, or biliary obstruction.
A commercial driver with a solitary functioning kidney and a normal eGFR, no proteinuria, and well-controlled blood pressure presents for DOT certification. What is the appropriate action?
Answer: Certify for up to 2 years if renal function is normal and the driver is otherwise qualified
A single kidney is not automatically disqualifying; if the remaining kidney functions normally and no other disqualifying conditions are present, the driver may be certified for the standard 2-year period.
When a DOT urinalysis shows very low specific gravity (1.001–1.003), which condition should the examiner consider?
Answer: Diabetes insipidus or polydipsia affecting urine dilution
A very low specific gravity suggests the kidneys cannot concentrate urine, raising concern for diabetes insipidus, excessive fluid intake, or renal concentrating defects.