This medical procedure uses a long, flexible, tubular instrument called the colonoscope to view the entire inner lining of the colon (large intestine) and the rectum.
When is a colonoscopy performed?
This is generally recommended when the patient complains of rectal bleeding or has a change in bowel habits and other unexplained abdominal symptoms. The test also enables the physician to check for bowel diseases such as ulcerative colitis and Crohn’s disease, and even colorectal cancer.
How does the procedure work?
A thin, well-lubricated colonoscope will be inserted into the anus and it will be gently advanced through the colon to examine the entire length of the large intestine tissue samples can be obtained and small polyps also can be removed through the colonoscope.
After the procedure, the colonoscope is slowly withdrawn and the instilled air is allowed to escape. The anal area is then cleansed with tissues.
Does it hurt?
The patient is generally given a sedative and a pain-killer through an Intravenous (IV) line. Most patients complain of minor discomfort and pressure from the colonoscope moving inside. However, the procedure is not painful.
How long does it take?
The procedure may take anywhere from 30 minutes to two hours depending on how easy it is to advance the scope through the colon.
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Dr. Zafar Quader
Consultant in Gastroenterology
Dr. Zafar Quader is a consultant Gastroenterologist, with more than 20 years of experience. He completed his medical training and gastroenterology fellowship in Chicago, Illinois. Dr. Zafar has been in clinical practice and involved in clinical research in St. Louis, Missouri since 1995 and moved to Dubai in 2015. Dr. Quader provides individualized care to all adult patients with gastrointestinal disorders.Read more