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Definition:

Abdominal sounds are the noises made by the intestines.



Alternative Names:

Bowel sounds



Considerations:

Abdominal sounds (bowel sounds) are made by the movement of the intestines as they push food through. Since the intestines are hollow, bowel sounds can echo throughout the abdomen much like the sounds heard from water-pipes.

The majority of bowel sounds are harmless and simply indicate that the gastrointestinal tract is working. A doctor can evaluate abdominal sounds by listening to the abdomen with a stethoscope (auscultation ).

Although the majority of bowel sounds are normal, there are some instances in which abnormal bowel sounds provide valuable information about the health of the body.

Ileus is a condition in which there is a lack of intestinal activity. Many medical conditions may lead to ileus, but it is important to evaluate it further because gas, secretions, and intestinal contents can build up and rupture the bowel wall. The doctor may be unable to hear any bowel sounds when listening to the abdomen.

Reduced (hypoactive) bowel sounds include a reduction in the loudness, tone, or regularity of the sounds. They indicate a slowing of intestinal activity.

Hypoactive bowel sounds are normal during sleep, and also occur normally for a short time after the use of certain medications and after abdominal surgery. Decreased or absent bowel sounds often indicate constipation.

Increased (hyperactive) bowel sounds are sometimes heard even without a stethoscope. Hyperactive bowel sounds reflect an increase in intestinal activity. This can sometimes occur with diarrhea and after eating.

Abdominal sounds are always evaluated together with symptoms such as:

  • Gas
  • Nausea
  • Presence or absence of bowel movements
  • Vomiting

If bowel sounds are hypoactive or hyperactive, along with abnormal symptoms, continued evaluation by a health care provider is important.

For example, absent bowel sounds after a period of hyperactive bowel sounds are significant and can indicate a rupture of the intestines, or strangulation of the bowel and death (necrosis ) of the bowel tissue.

Very high-pitched bowel sounds may indicate early bowel obstruction.



Common Causes:

Most of the sounds you hear in your stomach and intestines are due to normal digestion and are no need for concern. Many conditions can cause hyperactive or hypoactive bowel sounds. Most are harmless and require no treatment.

The following is a list of more serious conditions that can cause abnormal bowel sounds.

Hyperactive, hypoactive, or absent bowel sounds:

Other causes of hypoactive bowel sounds:

  • Drugs that reduce intestinal movements such as opiates (including codeine), anticholinergics, and phenothiazines
  • General anesthesia
  • Radiation to the abdomen
  • Spinal anesthesia
  • Surgery in the abdomen

Other causes of hyperactive bowel sounds:



Home Care:



Call your health care provider if:

Call your health care provider if you experience any symptoms such as:

  • Bleeding from your rectum
  • Nausea
  • Prolonged diarrhea or constipation
  • Vomiting


What to expect at your health care provider's office:

The doctor will perform a physical exam and ask you questions about your medical history. You may be asked:

  • What other symptoms are present?
  • Have you noticed any abdominal pain?
  • Have you noticed any diarrhea?
  • Have you noticed any constipation?
  • Have you noticed any abdominal distention ?
  • Have you noticed any excessive or absent gas (flatus) ?
  • Have you noticed any bleeding from the rectum or black stools?

Depending on the findings of your physical exam, the doctor may order further tests. Tests may include:

If there are signs of an emergency, you will be sent to the hospital. A tube will be placed through your nose or mouth into the stomach or intestines. This empties your intestinal contents. Usually, you will not be allowed to eat or drink anything, so your intestines can rest. You will be given fluids through a vein (intravenously).

You may be given medication to reduce symptoms and to treat the cause of the problem. (The specific medication depends on the situation.) Some people may need surgery immediately.



References:

Proctor DD. Approach to the patient with gastrointestinal disease. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 134.

Postier RG, Squires RA. Acute abdomen. In: Townsend CM, Beauchamp RD, Evers BM, Mattox KL, eds. Sabiston Textbook of Surgery. 18th ed. Philadelphia, Pa: Saunders Elsevier; 2008:chap 45.




Review Date: 11/16/2008
Reviewed By: Linda Vorvick, MD, Family Physician, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. 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- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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