Urinary bladder distention occurs when the bladder becomes excessively stretched or enlarged due to the accumulation of urine.
Frequently Asked Questions
What causes acute urinary retention (bladder distention)?
The commonest cause in men over 50 is BPH-related obstruction, often triggered by cold-cough medications (decongestants) or acute prostatitis. In women it's more often from pelvic organ prolapse, post-childbirth or post-hysterectomy nerve dysfunction, or a large fibroid pressing on the bladder neck. Both sexes: spinal cord injury, cauda equina syndrome (medical emergency — back pain plus new leg weakness plus retention needs same-day MRI), diabetes-related neurogenic bladder, urethral stricture, and constipation with faecal impaction. Post-surgery retention (especially after spinal anaesthesia or pelvic surgery) is common and usually short-lived.
What are the warning signs I need to go to ER right away?
Six red flags. (1) Can't pass any urine at all for 6+ hours with a strong urge — this is acute retention and needs catheterisation. (2) Severe lower-abdomen pain with a palpable bump above the pubic bone. (3) Back pain with new leg weakness or saddle-area numbness (cauda equina — same-day MRI required). (4) Fever with retention (obstructed infected system — sepsis risk). (5) Blood in urine plus inability to void. (6) Retention after recent childbirth or surgery not resolving within 6-8 hours. Do not wait at home — most Indian city hospitals do a bedside urinary catheter in 15 minutes.
What happens if bladder distention is not treated in time?
Three stages of damage. (1) Bladder muscle fatigue and atony — the overstretched detrusor loses its ability to contract normally, sometimes permanently, requiring long-term intermittent self-catheterisation. (2) Backup pressure on the kidneys (hydroureter and hydronephrosis) — chronic retention silently raises creatinine and can cause irreversible obstructive nephropathy in weeks. (3) Post-obstructive infection and sepsis. Bladder rupture is rare but possible with trauma or extreme overdistension. Rule of thumb: if you've had reduced flow and incomplete emptying for weeks, get creatinine and a KUB ultrasound before things silently worsen.
How is urinary retention treated?
Emergency treatment is bladder catheterisation — a Foley catheter drains the bladder immediately, and the volume drained is documented (>500 mL confirms retention). Definitive treatment targets the cause: alpha-blockers (tamsulosin 0.4 mg) plus catheter for BPH-related retention, with a trial without catheter after 3-7 days; TURP or HoLEP if trial fails or repeated retention occurs (₹40k-2 lakh in Indian private hospitals). For neurogenic bladder, clean intermittent self-catheterisation is standard. Post-anaesthesia retention usually resolves within 24 hours after a single catheterisation.
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