Which is true about post obstructive diuresis?

Correct Answer: B

Rationale: Post-obstructive diuresis is >200 mL/hr for 2+ hours physiologic response to relieve backlog post-obstruction (e.g., BPH relief). >100 mL/hr is normal too low. >400/500 mL/hr is excessive pathologic threshold, not standard. 200 mL/hr distinguishes it, critical for monitoring fluid loss, unlike normal or extreme rates.

Correct Answer: C

Rationale: Fetal uropathy typically denotes posterior urethral valve (PUV) obstructs fetal bladder outflow, causing hydronephrosis. Renal agenesis is lethal broader term. VUR is reflux, not primary obstruction secondary. Exstrophy is structural distinct. PUV's obstructive impact distinguishes it, key to fetal urinary pathology, unlike agenesis, reflux, or malformation.

Correct Answer: C

Rationale: Serum PSA strongly predicts BPH progression reflects prostate volume, risk of acute retention/surgery. Age correlates less specific. Flow rates indicate obstruction variable progression link. Symptom score (IPSS) tracks bother not progression strength. PSA's predictive power distinguishes it, critical for risk stratification, unlike age, flow, or symptom metrics.

Correct Answer: A

Rationale: The efferent arteriole carries blood from the glomerulus to peritubular capillaries/vasa recta, not those vessels or interlobular vein (later drainage). This distinguishes glomerular outflow, vital for filtration dynamics, contrasting with downstream vessels.

Correct Answer: C

Rationale: Average urine output is 1.5 L/day (varies 1-2 L), not 12 L (excessive), 100 mL (too low), or 3 L (high). This measures excretory output, vital for fluid balance, contrasting with extremes.