Stress incontinence, also known as stress urinary incontinence (SUI) or effort incontinence is a form of urinary incontinence. It is due to inadequate closure of the bladder outlet by the urethral sphincter.
It is the loss of small amounts of urine associated with coughing, laughing, sneezing, exercising or other movements that increase intra-abdominal pressure and thus increasing the pressure on the bladder. The urethra is normally supported by fascia and muscles of the pelvic floor. If this support is insufficient due to any reason, the urethra would not close properly at times of increased abdominal pressure, allowing urine to pass involuntarily.
Most lab results such as urine analysis, cystometry and post-void residual volume are normal.
Some sources distinguish between urethral hypermobility and intrinsic sphincter deficiency. The latter is more rare, and requires different surgical approaches.
Stress incontinence in men is most commonly seen after prostate surgery, such as prostatectomy, transurethral resection of the prostate, laparoscopic prostatectomy, or robotic prostatectomy.
In women pregnancy, childbirth, obesity, and menopause often contribute to stress incontinence by causing weakness to the pelvic floor or damaging the urethral sphincter, leading to its inadequate closure, and hence the leakage of urine. Stress incontinence can worsen during the week before the menstrual period. At that time, lowered estrogen levels may lead to lower muscular pressure around the urethra, increasing chances of leakage. The incidence of stress incontinence increases following menopause, similarly because of lowered estrogen levels. In female high-level athletes, effort incontinence may occur in any sports involving abrupt repeated increases in intra-abdominal pressure that may exceed perineal floor resistance.
Medications are not recommended for those with stress incontinence.
Some behavioral changes can improve stress incontinence. It is recommended to decrease overall consumption of liquids and avoid drinking caffeinated beverages because they irritate the bladder.