Mercy Hospital & Health Services Contact Us
MyChart
About Mercy
Join Our Team
set font size large set font size medium set font size small
email this page print this page
Health Illustrated Encyclopedia Banner
Health Illustrated Encyclopedia

Disclaimer:
Our Health Information Database is provided by A.D.A.M. the leading provider of electronic and printed information for professionals and consumers in healthcare and industry. It provides authoritative, reliable content written and reviewed by an editorial board who represent a variety of specialty areas. This board reviews and evaluates all healthcare information to ensure it is accurate, reliable, and can be used with complete confidence. And now you have access to the same authoritative, trusted clinical information relied upon by health professionals around the world.
Bladder outlet obstruction

Definition

Bladder outlet obstruction (BOO) is a blockage at the base of the bladder that reduces or prevents the flow of urine into the urethra, the tube that carries urine out of the body.

Alternative Names

BOO; Lower urinary tract obstruction; Prostatism

Causes, incidence, and risk factors

Bladder outlet obstruction (BOO) can have many different causes, including:

  • Benign prostatic hyperplasia (BPH), or enlarged prostate
  • Bladder stones
  • Bladder tumors (cancer)
  • Pelvic tumors (cervix, prostate, uterus, rectum)
  • Urethral stricture (scar tissue)

Less common causes include:

  • Cystocele
  • Foreign objects
  • Posterior urethral valves (congenital birth defect)
  • Urethral spasms
  • Urethral diverticula

This condition is most common in aging men. It is often caused by BPH. Bladder stones and bladder cancer are also more commonly seen in men than women. As a man ages, the chance of developing these diseases increases dramatically.

See also:

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

Treatment

Treatment of bladder outlet obstruction depends on the cause of the problem. For most cases, a tube, called a catheter, inserted through the urethra into the bladder, will relieve the obstruction temporarily.

Occasionally, a suprapubic catheter (a tube placed through the belly area into the bladder) is needed to drain the bladder.

Long-term treatment of bladder outlet obstruction usually involves surgery. However, medical treatment options are available for many of the diseases that cause this problem. Discuss treatment options with your health care provider.

Support Groups

Expectations (prognosis)

If diagnosed early, most causes of bladder outlet obstruction can be treated with great success. However, if diagnosis is delayed, permanent damage can result.

Complications

Long-term or high-grade bladder outlet obstruction can permanently damage all parts of the urinary system.

Complications include:

  • Bladder and kidney stones
  • Kidney failure
  • Recurrent urinary tract infections
  • Urinary incontinence
  • Urinary retention

Calling your health care provider

If you have symptoms of bladder outlet obstruction, call your provider. Early diagnosis is important and can often lead to a simple and effective cure.

Prevention

The condition may be prevented by identifying and treating the cause of the blockage.

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.

View Spanish Version

Encyclopedia Home
Drug Note Home
Health Information Home

Images

Care Points
    Read More

    Review Date: 6/17/2010

    Review By: 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.

    The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2010 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

    www.adam.com
    www.mercyweb.org
    follow us online
    facebook youtube


    Contact us
    Home  |  Sitemap

    Disclaimer & Terms of Use  |  Privacy Statement  |  Notice of Privacy Practices
    Copyright ©2013 Mercy. Last modified 2/16/2011