# Spinal Cord Injury Bladder Management > Spinal cord injury bladder care for NEET-PG Surgery: spinal shock, sphincter dyssynergia, autonomic dysreflexia, CIC and renal surveillance. - Canonical URL: https://prepelephant.com/topics/neet-pg/surgery/spinal-cord-injury-bladder-management - Exam / course: NEET-PG · Subject: Surgery - Publisher: PrepElephant (https://prepelephant.com) — Prepared and reviewed by the PrepElephant Academic Review Team - First published: 2026-10-02 - Last updated: 2026-10-02 - How to cite: "Spinal Cord Injury Bladder Management", PrepElephant, https://prepelephant.com/topics/neet-pg/surgery/spinal-cord-injury-bladder-management ## Direct answer After spinal cord injury a flaccid, areflexive detrusor requiring drainage by clean intermittent catheterisation — and then declares its final pattern by the level of the lesion: suprasacral injuries produce a neurogenic overactive detrusor with sphincter dyssynergia (high-pressure storage), while conus and cauda equina lesions leave an areflexic bladder with a competent or flaccid outlet. Management aims to make the bladder a low-pressure reservoir emptied regularly — classically CIC four to six hourly with antimuscarinics — because high storage pressures, not incontinence itself, destroy the upper tracts. Above T6, bladder distension and instrumentation can trigger autonomic dysreflexia, a hypertensive emergency relieved by sitting the patient up and draining the bladder. ## What you must remember - Spinal shock lasts days to weeks: detrusor areflexia with overflow drainage — indwelling or intermittent catheterisation, with strict asepsis and bowel care. - Suprasacral (above conus, typically above T12) lesions: neurogenic detrusor overactivity plus detrusor sphincter dyssynergia — involuntary contractions against a closed sphincter, generating high pressures, detrusor thickening and trabeculation. - Sacral/conus/cauda equina lesions: detrusor areflexia with overflow incontinence and a lax outlet; management is drainage by CIC or triggered voiding with abdominal straining (Crede is generally discouraged for high-pressure reflux risk). - Autonomic dysreflexia (lesions at or above T6): pounding headache, hypertension, bradycardia, sweating and flushing above the level, provoked by bladder distension, catheter blockage, UTI or bowel loading; first aid is sit up, check and drain the bladder, then short-acting antihypertensives (nifedipine bite or glyceryl trinitrate) if needed. - Detrusor leak point pressure above 40 cm H2O (on urodynamics) predicts upper tract deterioration — the number that escalates therapy. - Long-term plan: CIC 4-6 times daily plus antimuscarinic; escalate to intradetrusor botulinum toxin, sacral neuromodulation or bladder augmentation for refractory high-pressure storage; sphincterotomy or stents for dyssynergia in selected men. - Treat only symptomatic urinary infections; bacteriuria is near-universal in catheterised patients and antibiotics for asymptomatic bacteriuria breed resistance. ## Building the plan for a T4 lesion A 24-year-old with a complete T4 injury is admitted; during spinal shock he is managed with an indwelled catheter or CIC as soon as practical, with early switch to clean intermittent catheterisation five times daily to keep volumes under 400-500 mL. As reflexes return, urodynamics characterises the bladder: detrusor overactivity with dyssynergia is expected, and leak point pressures decide urgency. Storage therapy — an antimuscarinic (oxybutynin, solifenacin) or mirabegron — lowers pressure and protects kidneys; botulinum toxin injections into the detrusor buy about six to nine months per session at the cost of possible catheter dependence. The T4 level adds the dysreflexia drill: during a blocked catheter or catheter change, the patient develops crushing headache and a pressure of 200/110. The sequence is sit upright, loosen clothing, inspect and drain the bladder (the commonest trigger), check for bowel loading, and give a rapid-acting antihypertensive if blood pressure remains high — before any further instrumentation. Lifetime surveillance is renal ultrasound and creatinine with periodic urodynamics, because renal failure from a silently high-pressure bladder was once the leading killer of paraplegic patients; the goal is never merely "dry" but "low pressure and emptied". ## Where students slip The reflex answer "paraplegic bladder equals indwelling catheter" is outdated doctrine: long-term indwelling catheters carry stones, infection, strictures and squamous metaplasia of the bladder, and CIC is the standard where hands or caregivers permit. The second slip is missing autonomic dysreflexia as a urological emergency — a blocked catheter in a T6-plus patient is hypertension with a headache, not a urology inconvenience. The third is forgetting the level-dependence: writing "reflex bladder with dyssynergia" for a cauda equina lesion ignores that conus/sacral lesions produce the areflexic pattern, and the examiner deliberately chooses one or the other in the stem. ## Frequently asked questions ### What happens to the bladder during spinal shock? Detrusor areflexia with retention and overflow; drainage by intermittent or indwelling catheterisation until reflex activity returns over days to weeks. ### What bladder pattern follows a suprasacral cord injury? Neurogenic detrusor overactivity with detrusor sphincter dyssynergia — high-pressure, poorly emptying storage requiring antimuscarinics plus CIC, with escalation to botulinum toxin or augmentation. ### What is autonomic dysreflexia and its first-aid management? A hypertensive crisis with headache, bradycardia and sweating above the lesion in injuries at or above T6, triggered by bladder or bowel distension; sit the patient up, drain the bladder and treat the trigger before considering antihypertensives. ### Why is clean intermittent catheterisation preferred to a long-term indwelling catheter? Lower rates of chronic infection, stones, urethral stricture and bladder contracture, and better preservation of body image and sexuality, provided volumes and technique are disciplined. ### Which urodynamic finding escalates neurogenic bladder treatment? A detrusor leak point pressure above 40 cm H2O, indicating storage pressures high enough to damage the upper tracts.