Bladder outlet obstruction - Symptom
Alternative Names
BOO; Lower urinary tract obstruction; Prostatism
Symptoms:
The symptoms of bladder outlet obstruction may vary, but can include:
- Abdominal pain
- Continuous feeling of a full bladder
- Delayed onset of urination (urinary hesitancy)
- Frequent urination
- Inability to urinate (acute urinary retention)
- Pain on urination (dysuria)
- Slow urine flow
- Urinary tract infection
- Urine stream starts and stops (urinary intermittency)
- Waking up at night to urinate (nocturia)
Signs and tests:
If bladder outlet obstruction is suspected, your health care provider will take a thorough history of your problems. During a physical exam, your provider may find one or more of the following possible causes:
- Abdominal mass
- Cystocele (women)
- Distended bladder
- Enlarged prostate (men)
Tests may include:
- Blood chemistries to look for signs of kidney damage
- Cystoscopy and retrograde urethrogram (x-ray) to look for narrowing of the urethra
- Ultrasound to locate the blockage of urineand find out how well the bladder empties
- Urinalysis to look for blood or signs of infection in the urine
- Urine culture to check for an infection
- Uroflowmetry to determine how fast urine flows out of the body
- Urodynamic testing to see how much the urine flow is blocked and how well the bladder contracts
- Reviewed last on: 6/17/2010
- Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Scott Miller, MD, Urologist in private practice in Atlanta, Georgia. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
References
Wein AJ, ed. Campbell-Walsh Urology. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2007.
Tseng TY, Stoller ML. Obstructive uropathy. Clin Geriatr Med. 2009 Aug;25(3):437-43.

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