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    Blind Loop Syndrome

    What is blind loop syndrome?

    Your digestive system breaks down the food you eat. Then your body can use it for fuel. Food you eat moves from your stomach into your small intestine. There, nutrients are absorbed. The waste is pushed into the colon and leaves the body as poop (stool). Blind loop syndrome is caused when a part of the small intestine slows down. Then it doesn't digest food normally.

    Blind loop syndrome is also called:

    • Stasis syndrome

    • Stagnant loop syndrome

    • Bowel bypass syndrome

    • Small intestinal bacterial overgrowth (SIBO)

    What causes blind loop syndrome?

    The intestine has a system of movements. These move food, secretions, and bacteria through the tube. After some kinds of surgery or for other reasons, a loop of bowel has less movement or stops. Bacteria then overgrow in that area. This can cause symptoms. Nutrients from your food may not be absorbed well.

    Blind loop syndrome may be caused by any of these:

    • Abdominal surgery

    • Obesity (bariatric) surgery that shortens and bypasses part of the bowel 

    • Digestive problems

    • Small intestine diverticulosis

    • Surgery for peptic ulcer disease

    • Inflammatory bowel disease such as Crohn's disease and colitis

    • Medicines that slow the intestines

    • Conditions that slow the intestines, such as diabetes and scleroderma.

    What are the symptoms of blind loop syndrome?

    Symptoms often include:

    • Weight loss due to trouble absorbing nutrients

    • Gas

    • Bloating

    • Bulging belly (abdomen)

    • Diarrhea

    Poor absorption of nutrients can cause symptoms such as:

    • Frequent diarrhea

    • Nausea or vomiting

    • Belly (abdominal) swelling from fluid buildup

    • Swelling of the legs

    • Belly pain and cramping

    • Poop that is loose and fatty

    • Tiredness or weakness

    • Gas and bloating

    • Low levels of some vitamins

    In rare cases, severe overgrowth of bacteria can inflame your intestinal lining. Also in rare cases, the bacteria can get into the blood. This infection can cause:

    • Fever

    • Joint pain that feels like arthritis

    • Skin rash or red bumps on the skin

    • Inflamed tendons

    • Muscle pain or aches

    How is blind loop syndrome diagnosed?

    Your healthcare provider will ask about your:

    • Symptoms

    • Health history

    • History of surgery

    • Family health history

    You may have tests such as:

    • Blood tests to check for infections and nutrient levels

    • Breath tests to look for bacterial overgrowth

    • Tests to check organ function

    • Test to check for inflammation in the body

    • Exam of poop for fecal fat, bacteria, parasites, or white blood cells

    • Imaging tests to look at the shape of your intestines

    • Colonoscopy or upper endoscopy to look at the intestinal lining

    How is blind loop syndrome treated?

    It's most often treated with antibiotics. A short course of corticosteroids can reduce inflammation. They may also help control symptoms.

    Some people need surgery to remove the affected area. If obesity surgery caused blind loop syndrome, your surgeon may do another surgery to fix the problem.

    What are possible complications of blind loop syndrome?

    Blind loop syndrome can cause a lack of vitamins and minerals. This includes Vitamin B12 and iron. If not treated, blind loop syndrome may lead to serious health problems due to poor nutrition.

    When should I call my healthcare provider?

    Call your healthcare provider if you have symptoms of blind loop syndrome.

    Key points

    • Blind loop syndrome occurs when part of your small intestine doesn't move normally. It then causes bacteria to overgrow in the intestines.

    • It can be caused by abdominal surgery, some diseases, and some medicines.

    • Symptoms include weight loss, gas, and bloating.

    • Other symptoms can include fever, diarrhea, vomiting, and belly pain.

    • It's usually treated with antibiotics. Some people may need surgery.

    Next steps

    Tips to help you get the most from a visit to your healthcare provider:

    • Know the reason for your visit and what you want to happen.

    • Before your visit, write down questions you want answered.

    • Bring someone with you to help you ask questions and remember what your provider tells you.

    • At the visit, write down the name of a new diagnosis, and any new medicines, treatments, or tests. Also write down any new instructions your provider gives you.

    • Know why a new medicine or treatment is prescribed, and how it will help you. Also know what the side effects are.

    • Ask if your condition can be treated in other ways.

    • Know why a test or procedure is recommended and what the results could mean.

    • Know what to expect if you do not take the medicine or have the test or procedure.

    • If you have a follow-up appointment, write down the date, time, and purpose for that visit.

    • Know how you can contact your healthcare provider if you have questions.

    Online Medical Reviewer: Jen Lehrer MD
    Online Medical Reviewer: L Renee Watson MSN RN
    Online Medical Reviewer: Rita Sather RN
    Date Last Reviewed: 8/1/2022
    © 2000-2024 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
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    Southern New Mexico
    Surgery Center

    2301 Indian Wells Rd. Suite B
    Alamogordo, NM 88310
    www.snmsc.org

    Phone: 575.437.0890
    Fax: 575.437.0905
    Email: info@snmsc.org

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