Patient Registration

"All endoscopic procedures (upper endoscopy and colonoscopy) are performed at facilities approved by state recognized accreditation agencies. Patients can be assured that they are done safely and painlessly with anesthesiologist at premise"

Esophagogastroduodenoscopy (EGD) or Upper endoscopy

What is upper endoscopy?

Upper endoscopy is a procedure which enables the direct visualization of the lining of the upper part of your gastrointestinal tract, which includes the esophagus, stomach and duodenum (first portion of the small intestine). During this procedure, a thin, flexible tube called an endoscope, which has its own lens and light source, is passed through the mouth and advanced to the beginning of the small intestine

Why is upper endoscopy done?

Upper endoscopy assists the doctor in evaluating symptoms of persistent upper abdominal pain, nausea, vomiting or difficulty swallowing. It's an excellent test for finding the cause of bleeding from the upper gastrointestinal tract. It is more accurate than X-ray films for detecting inflammation, ulcers and tumors of the esophagus, stomach and duodenum.

A biopsy (small tissue samples) is often obtained during an upper endoscopy. A biopsy can distinguish between benign and malignant (cancerous) tissues, can detect the presence of Helicobacter pylori (a bacterium associated with most ulcers) and can detect Barrett’s esophagus (a potential precursor to esophageal cancer).

Upper endoscopy is also used to treat conditions of the upper gastrointestinal tract such as bleeding and to dilate strictures (narrowed areas).

How should I prepare for the procedure?

An empty stomach is essential for an accurate and safe examination, so you should have nothing to eat or drink, including water, for approximately eight hours before the examination.

What can I expect during upper endoscopy?

Our anesthesiologist will administer a short acting intravenous sedative and will be present to monitor your vital signs during the procedure. You will not experience any sensation of gagging or choking. A mouthpiece will be placed between your teeth to keep your mouth open and to prevent your teeth from biting our scope. You will lie on your left side, and the endoscope will be passed through your mouth and into the esophagus, stomach and duodenum. The endoscope doesn't interfere with your breathing. The examination typically lasts 10 minutes.

What happens after upper endoscopy?

You will be monitored until most of the effects of the medication have worn off. Your throat might be a little sore, and you might feel bloated because of air introduced into your stomach during the test. Once you leave the office, you will be able to eat unless you are instructed otherwise.

Your test results will be discussed with you before you leave. The biopsy results will take approximately 5 to 10 business days.

You will not be allowed to drive for 12 hours. You will need to arrange for someone to accompany you home because the sedatives you received.

What are the possible complications of upper endoscopy?

Although complications are rare, bleeding can occur at a biopsy site or where a polyp was removed. If this occurs, it's usually minimal and rarely requires follow-up. Other potential risks include a reaction to the sedative used and a perforation (a tear in the gastrointestinal tract lining). It's important to recognize early signs of possible complications. If you have a fever after the test, trouble swallowing or increasing throat, chest or abdominal pain, call us immediately.



What is a colonoscopy?

Colonoscopy is a procedure which enables the direct visualization of the lining of your colon (large intestine). A flexible tube, as thick as your finger, is inserted into the anus and slowly advanced from the rectum to the cecum (the anatomic beginning of the colon). Lesions such as polyps and colon cancer, and inflammation can be found during a colonoscopy. Biopsies can be obtained, and most polyps can be removed during a colonoscopy.

What preparation is required?

The preparation involves going on a clear liquid diet for 24 hours prior to the procedure. In addition, a laxative preparation is taken the night before and again, approximately 5 hours, prior to the procedure. Recent research has shown that “split dosing” leads to a better visualization of the colon. The colon must be completely clean for the procedure to be accurate and complete, so it is important to follow the instructions carefully.

Can I take my current medications?

Most medications can be continued as usual, but some medications can interfere with the preparation or the examination. Inform us about medications you're taking, particularly aspirin products, arthritis medications, anticoagulants (blood thinners), insulin or iron products. Aspirin is usually held for 7 days.

If you require antibiotics before dental procedures, please let the office know.

What happens during colonoscopy?

Colonoscopy is well-tolerated and pain-free.

You will lie on your side or back during the procedure. The procedure itself usually lasts approximately 20 minutes, although you should plan on one to two hours for waiting, preparation and recovery.

In some cases, the colonoscopy may not be completed due to a variation in the person’s colon anatomy and concern for a higher risk of a perforation. In this case, we may recommend a CT colonography (“virtual colonoscopy”) or a barium enema to visualize the portions of the colon which were not visualized during the colonoscopy.

What if the colonoscopy shows something abnormal?

If an area needs further evaluation, a biopsy may be obtained. If polyps are found during colonoscopy, they will most likely be removed during the examination.

What happens after a colonoscopy?

You will not be allowed to drive for 12 hours. You will need to arrange for someone to escort you home from our office. Even if you feel alert after the procedure, your judgment and reflexes could be impaired for the rest of the day. You might have some cramping or bloating because of air that is introduced into the colon during the examination. This should disappear quickly when you pass gas.

You should be able to eat after the examination.

What are the possible complications of colonoscopy?

Complications are uncommon but may include a perforation, or tear, through the bowel wall that could require surgery. Bleeding might occur at the site of biopsy or polypectomy, but it's usually minor. Bleeding can stop on its own or be controlled through the colonoscope; it rarely requires follow-up treatment. Some patients might have a reaction to the sedative agent.

Please contact the office if you experience severe abdominal pain, fever and chills, or profuse rectal bleeding after the procedure.

  • ASGE
  • Lenox Hill Hospital
  • North Shore LIJ
JAN J. SHIM, M.D. 4 EAST 88TH STREET, SUITE 1A NEW YORK, NY 10128 TEL: (212) 535-5020