Doctor Specializing in Flexible Sigmoidoscopy

Expert Gastroenterologists Dedicated to Providing Comprehensive Care

Suffering from lower intestinal issues can be both distressing and debilitating. At Triborough GI, our team of expert gastroenterologists specializes in flexible sigmoidoscopy procedures to diagnose and treat various conditions affecting your lower digestive tract.

Equipped with cutting-edge technology and a patient-centered approach, we’re devoted to helping you regain control of your digestive health and enhance your overall wellbeing. Trust Triborough GI for exceptional care from the best in the field.

Schedule Your Flexible Sigmoidoscopy Consultation Today!

Embrace a Healthier, More Comfortable Life

  • Accurate Diagnosis: Determine the cause of your lower intestinal issues for targeted treatment.
  • Minimally Invasive: Experience a safe, gentle procedure with minimal discomfort and recovery time.
  • Expert Care: Receive personalized care from our team of experienced gastroenterologists.
  • Advanced Technology: Benefit from our state-of-the-art facilities and cutting-edge equipment.
  • Improved Wellbeing: Alleviate symptoms, regain control of your digestive health, and enhance your quality of life.

Our Flexible Sigmoidoscopy Specialists

At Triborough GI, our skilled team of gastroenterologists is dedicated to providing you with the highest standard of care. Boasting years of experience and a deep understanding of digestive health, our specialists collaborate to develop customized treatment plans tailored to your unique needs.

Igor Grosman, DO, FASG

Igor Grosman, DO, FASG

Gastroenterologist & Obesity Medicine Specialist

Igor Grosman, DO, FASG, is board certified in both gastroenterology and obesity medicine, serving patients at Triborough GI in Brooklyn, the Bronx, and Staten Island, New York.

Alexander Brun, MD

Alexander Brun, MD

Gastroenterologist & Hepatologist

Alexander Brun, MD, is a board-certified specialist in internal medicine and gastroenterology. He serves the communities of Brooklyn, Staten Island, and the Bronx, New York, at Triborough GI.

Prateek Chapalamadugu, MD

Prateek Chapalamadugu, MD

Gastroenterologist & Hepatologist

Prateek Chapalamadugu, MD, is a board-certified gastroenterologist at Triborough GI serving the communities of Brooklyn, the Bronx, and Staten Island, New York.

Nancy Chen, MD

Nancy Chen, MD

Gastroenterologist, Obesity Medicine & Hepatologist

Nancy Chen, MD, is a board-certified gastroenterologist and internist at Triborough GI, a gastroenterology clinic with locations in Brooklyn, the Bronx, and Staten Island, New York.

Ilona Rabinovich

Ilona Rabinovich

ANCC Board Certified Family Nurse Practitioner

Ilona Rabinovich is a ANCC board certified Family Nurse Practitioner (FNP). She is dedicated and compassionate with a strong commitment to providing comprehensive healthcare to all.

Konstantin Peysin, DO

Konstantin Peysin, DO

Gastroenterologist & Hepatologist

A board-certified gastroenterologist, Dr. Konstantin Peysin currently practicing at Triborough GI, located in Brooklyn, Bronx, and Staten Island, NY

Where are we located?

Our Staten Island, Bronx, or Brooklyn based Flexible Sigmoidoscopy specialists can schedule and perform your procedure at one of our Triborough GI clinics.

One of our board-certified GI doctors will guide you through the procedure and provide you with all the information you need prior to having the procedure.


Important information about Flexible Sigmoidoscopy

Here is a short video to talk about Flexible sigmoidoscopy

What Is a Flexible Sigmoidoscopy

A flexible sigmoidoscopy is a safe medical procedure, in which one of our Triborough GI endoscopists will visually examine your colon and large intestine. This procedure is primarily recommended as a screening tool for colon cancer in people over 50 years old.

A flexible sigmoidoscopy is performed by inserting a thin, flexible tube (sigmoidoscope) into the rectum and guiding it through the colon. The sigmoidoscope is fitted with a video camera and provides the doctor with an up-close look inside the rectum, the sigmoid colon, and approximately 2 feet of the large intestine. If necessary, the sigmoidoscope can be used to take biopsies (tissue samples). The procedure generally takes approximately 15 minutes.

While this procedure does not allow your doctor to see the colon in its entirety, it may be preferable over a colonoscopy. This is due to a colonoscopy being a more complicated and risky procedure. Please speak to your doctor about which procedure is right for you.


Why You May Need a Flexible Sigmoidoscopy

A flexible sigmoidoscopy may be recommended by your physician to:

  • Screen for colon cancer or polyps (growths of tissue in the colon) 

Diagnose symptoms such as: rectal bleeding, abdominal pain, persistent diarrhea or constipation, etc.


For your flexible sigmoidoscopy to be successful, your colon will need to be completely cleaned out. An unclean colon will make it difficult for the doctor to get clear images and may cause some abnormalities to be missed.

To make sure your colon is completely cleaned out; you may be asked to:

  • Take laxatives – Taking a laxative in either liquid or pill form, is a common recommendation and will most likely need to be done the night before and the morning of the procedure.
  • Keep to a specific diet – You will not be able to eat solid food the day before your colonoscopy. All consumed liquids will need to be clear (water, tea, etc.). After midnight on the night before the procedure, you will not be able to eat or drink anything.
  • Adjust your medications – Some medications may interfere with your flexible sigmoidoscopy results. Please speak with your doctor about any medication you may be taking. Your dosage may need to be temporarily adjusted.
  • Use an enema – Using an over the counter enema kit right before the procedure will effectively empty your lower colon. An enema is not a commonly recommended tool but may be helpful.


The procedure usually takes approximately 15 minutes. You will be asked to lie down on the exam table on your left side. with your legs bent and your knees drawn towards your stomach.

Your doctor will use a sigmoidoscope to expand your colon with air. This is done to get a better view of the colon. It may also cause you some abdominal pain or give you the urge to void your bowels. The sigmoidoscope will then be inserted into the anus and advanced through the rectum, sigmoid colon, and descending colon. The camera on the tip of the scope will allow your doctor to see the inside of your colon on a screen.

If necessary, the endoscope can also be used to take biopsies (tissue samples). In this case the procedure may take a longer time to complete.

Unlike with a colonoscopy, sedation and pain medication is not usually necessary for a flexible sigmoidoscopy. However, if a polyp is found during the procedure, your doctor will most likely recommend a colonoscopy in order to visualize the colon in its entirety.

Recovery Time

After your procedure you may experience some mild discomfort in your abdomen. For a few hours after the procedure you may pass gas and feel bloated. You will generally be able to return to your daily routine right away.

A small amount of blood in your first post procedure bowel movement is normal. If bleeding or pain persists, or if you develop a fever of 100°F (37.8°C) consult with your doctor right away.

Our team at Triborough GI will let you know when your procedure results are available and if any further treatment is necessary.

Frequently Asked Questions (FAQs)

During a flexible sigmoidoscopy, you can expect to lie on your side while a thin, flexible tube with a camera is inserted into your rectum to examine your colon. The doctor may inflate your colon with air to get a better view. The procedure usually takes 20-30 minutes.

The procedure typically takes 20-30 minutes to complete.

The procedure is usually not painful, but you may feel some discomfort, pressure, or cramping during the insertion of the scope.

Risks associated with a flexible sigmoidoscopy include bleeding, perforation of the colon, and adverse reactions to anesthesia. However, these risks are rare.

Whether or not your insurance covers the cost of the procedure depends on your specific insurance plan. It’s recommended to check with your insurance provider to confirm coverage.

Triborough GI has the top NYC gastroenterologists in Brooklyn, Staten Island and the Bronx. Our doctors provide only the most specialized and extensive care. Our motto is that the patient’s care comes first! Highly reputable and top rated in NYC, our gastroenterologists will thoroughly examine, diagnose and treat you in any way they can. 

Schedule an appointment at (718) 332-0600 today with one of our Triborough GI doctors at our Brooklyn, Staten Island or Bronx locations for any questions or concerns you have regarding your Flexible Sigmoidoscopy procedure.


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