Neurogenic bladder

Disease Description (Causes and Symptoms)

• Definition summary: Neurogenic bladder is a collective term for bladder and urinary function disorders caused by abnormalities in the nervous system that controls urination, including the brain, spinal cord, and peripheral nerves.
• Main causes: Stroke, Parkinson’s disease, dementia, spinal cord injury (trauma or tumor), multiple sclerosis, herniated intervertebral disc/spinal stenosis, peripheral neuropathy (e.g., diabetic neuropathy), bladder ischemia, and others.
• Pathophysiology (brief): Depending on the location of the lesion:
  • Lesions above the sacral level (brain or upper spinal cord): May involve detrusor overactivity (urinary urgency and frequency) and involuntary contraction of the urethral sphincter (incontinence and voiding dysfunction) (neurogenic bladder–sphincter dyssynergia).
  • Sacral lesions (buttocks/sacral spinal cord): Detrusor areflexia and reduced urination may lead to residual urine and urinary retention.
  • Consequently, persistent high bladder pressure may cause vesicoureteral reflux, hydronephrosis, and decreased kidney function.
• Main symptoms: Frequent urination, nocturia, urinary urgency, urge urinary incontinence, difficulty urinating (hesitancy and weak stream), sensation of residual urine, recurrent urinary tract infections, and acute urinary retention.

Treatment Methods

• Goals: Protect the upper urinary tract (kidneys), minimize infections, urinary incontinence, and catheter-related complications, and improve quality of life.
• Medication treatment
  • Bladder overactivity (reservoir function disorder): Antimuscarinic agents (e.g., oxybutynin and tolterodine), β3 agonists (mirabegron), and others.
  • Reducing urethral resistance (when voiding dysfunction is present): α-blockers (in men with prostate-related obstruction).
  • Intermittent use: Antibiotics (for urinary tract infections)—culture-based treatment when necessary.
• Procedures and surgery
  • Clean intermittent catheterization (CIC): Standard management when there is a large amount of residual urine.
  • Indwelling catheterization (urethral or suprapubic): When short-term or long-term drainage is needed.
  • Intravesical botulinum toxin injection: Used for overactive bladder when anticholinergic drugs are not tolerated or are insufficiently effective.
  • Bladder augmentation (augmentation cystoplasty): When a high-pressure, low-capacity bladder poses a risk to the kidneys.
  • Urinary diversion: Considered in severe cases to protect the kidneys.
  • Neuromodulation (sacral nerve stimulation, sacral neuromodulation): May help improve symptoms in some patients (indications are limited).
• Lifestyle management (self-management)
  • Regular urination and intermittent urination schedules (timed voiding), fluid regulation (avoid both excessive and insufficient intake), constipation prevention (bowel management), and infection prevention through clean catheterization management.
  • Monitor medication side effects (dry mouth, constipation, blurred vision, etc.).
• Precautions (medical care and self-management)
  • Because persistent high intravesical pressure can cause kidney damage, regular kidney function tests and imaging studies are necessary.
  • When performing self-catheterization, receive appropriate education and follow aseptic techniques to prevent infection and urethral injury.
  • When using anticholinergic drugs, a history of glaucoma, severe gastrointestinal disease, or cardiovascular disease should be checked.
• Complications
  • Recurrent urinary tract infections, hydronephrosis and decreased kidney function, bladder stones, urinary tract bleeding, pressure sores and skin irritation (in cases of urine leakage), and device-related complications (such as urethral stricture).

Outpatient Visit Checklist (Including Items to Bring and Sample Questions)

• Items to bring (recommended)
  • List of currently used medications (including prescription drugs, over-the-counter drugs, and supplements)
  • Past medical and surgical history (especially neurological diseases, spinal surgery, and urinary tract surgery)
  • Recent test results, such as blood tests, ultrasound, CT, and urinalysis (copies if possible)
  • Voiding diary (if there have been changes, covering the most recent 3 to 7 days): Number of voids, voided volume, urinary urgency and urinary incontinence episodes, and number of nocturnal voids
  • If performing self-catheterization, a record of the frequency and method used
• Information that is useful to confirm before the outpatient visit (to provide or explain to the doctor)
  • When the symptoms started and how they have progressed (suddenly or gradually)
  • Progression of neurological disease (e.g., a recent stroke or trauma)
  • History of urinary tract infections (recent fever, pyuria, or dysuria)
  • Changes in urine volume (increased or decreased), weight changes, and presence of edema
• Sample questions to prepare to ask during the outpatient visit (for the initial consultation)
  • "What significance do the onset and changes in my recent symptoms (frequent urination, residual urine, and urinary incontinence) have for the diagnosis?"
  • "What basic tests should I undergo (urodynamic testing, ultrasound, etc.)?"

General Sample Questions to Ask the Doctor

• What are the expected effects and possible side effects of this medication (or procedure)?
• Is my kidney function at risk, and how should it be monitored?
• If I need to start clean intermittent catheterization (CIC), how will I receive training, and how often should it be performed?
• What should I do to prevent urinary tract infections?

Sample Questions Tailored to the Condition

• (When residual urine and urinary retention are the main problems) "What is my residual urine volume (as measured by ultrasound), and at what level would you recommend intermittent catheterization?"
• (When overactivity and incontinence are the main problems) "Between botulinum toxin injections and antimuscarinic drugs, which treatment is more suitable for my condition, and what are the expected duration of effect and side effects?"