Urinalysis and Renal Disorders Flashcards
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Under 49 CFR 391.43, which of the following is NOT part of the standard DOT urinalysis dipstick panel required during the commercial driver medical examination?
Answer: Urine creatinine concentration
Urine creatinine is not part of the standard DOT dipstick urinalysis; the required panel covers sugar, albumin, and specific gravity under the current federal medical examination protocol.
A medical examiner finds 3+ protein and 2+ glucose on a driver's urinalysis during the DOT physical. What is the most appropriate course of action?
Answer: Defer certification pending further evaluation of both findings
Combined significant proteinuria and glycosuria suggest serious underlying pathology (e.g., diabetic nephropathy) requiring complete evaluation before certification can be responsibly issued.
A CMV driver has successfully received a kidney transplant 18 months ago with stable graft function (eGFR 65), no rejection episodes, and is on stable immunosuppressive therapy. What is the most likely certification outcome?
Answer: Certification is possible if the driver meets all other standards and the examiner evaluates medication side effects
A successful kidney transplant with stable function does not automatically disqualify a driver; the examiner must evaluate graft stability, immunosuppressive medication side effects, and overall fitness.
Which of the following best describes the FMCSA's position on proteinuria discovered during a CMV driver's urinalysis?
Answer: Transient proteinuria from exertion or fever requires no further action if confirmed to be benign
Transient, benign causes of proteinuria (such as orthostatic proteinuria or post-exercise proteinuria) that are confirmed to be non-pathological do not require disqualification.
A commercial driver with polycystic kidney disease (PKD) and mildly reduced eGFR (62 mL/min) but no hypertension, no pain episodes, and no aneurysms is evaluated for DOT certification. What is the examiner's approach?
Answer: Evaluate functional status, blood pressure control, and related complications before deciding on certification
PKD is evaluated on its functional consequences — including renal function, blood pressure, intracranial aneurysm risk, and pain episodes — rather than being automatically disqualifying.
Which of the following scenarios would most warrant deferring a commercial driver's DOT certification due to renal findings?
Answer: A driver with new-onset 3+ proteinuria and an eGFR of 28 not previously evaluated by a physician
New significant proteinuria combined with a markedly reduced eGFR indicates probable advanced renal disease that requires specialist evaluation before any certification decision is made.
During the DOT physical, the medical examiner discovers that a driver's urine dipstick is positive for urobilinogen. What does this finding suggest?
Answer: Increased red blood cell destruction or hepatic disease affecting bilirubin processing
Elevated urobilinogen in urine results from increased bilirubin production (hemolysis) or impaired hepatic uptake of urobilinogen from the gut, indicating hemolytic or hepatic conditions.