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High-pressure chronic urinary retention secondary to bladder outlet obstruction — MSRA MCQ

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HardLUTSHigh-pressure chronic urinary retention secondary to bladder outlet obstructionMSRA

A 79-year-old man presents with 14 months of worsening hesitancy, weak stream, intermittency and a sensation of incomplete emptying. During the past 2 months he has developed nocturnal enuresis. He has no dysuria, fever, visible haematuria, loin pain or weight loss. Urine dipstick is negative for blood, leucocytes, nitrites and glucose. Digital rectal examination shows a smooth enlarged prostate. A bladder scan performed after he voids 180 mL shows a post-void residual volume of 1.25 L. Serum creatinine is 168 micromol/L (previously 92 micromol/L 9 months ago), with eGFR 38 mL/min/1.73 m². Renal ultrasound demonstrates bilateral hydronephrosis. He is afebrile, haemodynamically stable and has no suprapubic pain. What is the most appropriate immediate management?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: D — Insert a urethral catheter now and arrange urgent urological assessment

Explanation lettering: D = shown as B · B = shown as C · E = shown as D · C = shown as E

This is chronic urinary retention complicated by upper tract obstruction and renal impairment, rather than uncomplicated benign prostatic enlargement. The very large residual volume, new nocturnal enuresis and bilateral hydronephrosis indicate clinically significant chronic retention; the rise in creatinine supports obstructive renal dysfunction. NICE recommends catheterising men who have impaired renal function or hydronephrosis secondary to chronic urinary retention. He also requires urgent specialist assessment to establish the cause, assess renal recovery and plan definitive management. A is inappropriate because alpha-blocker and 5-alpha-reductase inhibitor treatment may be relevant to progressive benign prostatic enlargement, but do not address the immediate need to decompress a high-pressure retained bladder. B delays treatment despite established complications. C would be considered only for chronic retention with bothersome LUTS where there is no renal impairment or upper-tract abnormality. D may be an option before surgery in selected chronic retention, particularly where impaired bladder contractility is suspected, but outpatient teaching without immediate drainage is unsafe in this patient with hydronephrosis and renal impairment.

Reference: NICE CG97: Lower urinary tract symptoms in men: management — Recommendations (2010; current recommendations page checked 16 August 2026) — https://www.nice.org.uk/guidance/cg97/chapter/recommendations NICE CG97: Lower urinary tract symptoms in men: management — Recommendation 1.7.5 (2010; current recommendations page checked 16 August 2026) — https://www.nice.org.uk/guidance/cg97/chapter/recommendations NICE CG97: Lower urinary tract symptoms in men: management — Recommendations 1.7.6-1.7.7 (2010; current recommendations page checked 16 August 2026) — https://www.nice.org.uk/guidance/cg97/chapter/recommendations