Overactive bladder (OAB) is defined as: “urgency, with or without urge incontinence, usually with frequency and nocturia” where:
Frequency = voiding too often
Urgency = sudden compelling desire to pass urine which is difficult to defer
Incontinence = involuntary urine leakage accompanied by or immediately preceded by urgency, and
Nocturia = wake at night one or more times to void

Urge Urinary Incontinence
Unwanted urine leakage after sudden, intense desire to urinate.
Caused by involuntary detrusor contractions as bladder fills.
Unable to prevent urine flow with the “urge” sensation.

Stress Urinary Incontinence
Increased abdominal pressure (eg lifting, coughing) causing involuntary urine leakage.
Poor urethral support.
Predominately in women after child birth.

Detrusor Hyperreflexia
Failure to store urine due to increased detrusor contractility.
Usually neurological component although can be non-neurological.
Urodynamically defined condition.

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