Dr. K. IswaraGastroenterology
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Patient Instructions

Colonoscopy

Preparation instructions (video)

Watch the colonoscopy preparation instructions in your language.

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A colonoscopy is an important procedure for a detailed examination of the colon. A clean colon is essential for the best possible view, which is the purpose of this preparation.

  1. Seven days before

    • Avoid seeds, nuts, corn, and popcorn, which can block the view.

  2. Three days before

    • Switch to a low-fiber diet to make the colon easier to clean.
    • Avoid whole grains, fruits with skins or seeds, and raw vegetables.
    • Choose white bread, white rice, lean meats, eggs, and well-cooked vegetables without skin.

  3. One day before

    • Only clear liquids are allowed, so that no residue is left in the colon.
    • Avoid red or purple liquids, because they can stain the colon.

  4. Medication instructions

    • Blood thinners: ask Dr. Iswara or your doctor about medications such as warfarin or aspirin.
    • Diabetes medications: adjustments may be needed because of the diet restrictions.
    • Other medications: continue your essential medications unless you are told otherwise. Contact us if you have any doubts.

  5. Bowel cleansing

    • A cleansing solution is key to a colon free of waste.
    • The day before: start the prescribed solution according to Dr. Iswara’s instructions.
    • Hydration: drink at least eight glasses of clear liquids to stay hydrated.

  6. Day of the procedure

    • Fasting: typically, you’ll need to fast before the procedure, usually for about eight hours. This includes no food or liquids.
    • Clear liquids may be allowed in the morning for afternoon procedures. Please confirm with us.
    • Medications: take only the medications approved by Dr. Iswara, with a minimal amount of water.

  7. Transportation after the procedure

    • The sedation will make you drowsy. Arrange for someone to accompany you.
    • You cannot drive or use public transportation alone for 24 hours.

  8. Care after the procedure

    • Diet: start with soft foods, then gradually return to your regular diet over 24 hours.
    • Physical activity: light activity is fine. Avoid strenuous exercise for 24 hours.

  9. Urgent medical attention

    • Severe abdominal pain or swelling. Fever above 100.4 degrees Fahrenheit. Dark, tarry stools or large blood clots.

    (718) 615-0400 Medical emergency? Call 911.

Final note: Following these guidelines is crucial for a successful colonoscopy and an accurate diagnosis by Dr. Iswara.

Key information

What is it?
A colonoscopy is a medical procedure that allows doctors to examine the inner lining of your large intestine using a thin, flexible tube called a colonoscope.
Purpose
This test can help find ulcers, polyps, tumors, and areas of inflammation or bleeding in the colon. It is often used for cancer screening and diagnosing gastrointestinal problems.
Procedure location
Your colonoscopy will be performed at Calko Medical Center, in the Surgical Unit on the fourth floor.
Anesthesia
You will be under anesthesia with light sedation during the procedure, so you are comfortable and do not feel any pain.
Duration
The procedure typically takes 20 to 30 minutes.
Experience
It is a painless procedure. Most patients feel comfortable and relaxed because of the anesthesia.
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