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Colonoscopy is a diagnostic modality that helps to visualise and examine the colon or the large intestine. The technique involves the use of a long flexible tube with a light source on one of its ends. The tube is inserted transanally and may also be used to examine a portion of the small intestine. Colonoscopy is recommended to patients experiencing any of the following symptoms:

  • Traces of blood in the stool
  • Persistent abdominal pain and discomfort
  • Chronic diarrhoea
  • Unusual change in bowel habits

Colonoscopy is usually done for the diagnosis and assessment of colon malignancies and collection of tissue samples for biopsy.
Other common indications of Colonoscopy include:

  • Colon polyps
  • Inflammatory bowel disease

Colonoscopy may also be performed as a therapeutic intervention for the following:

  • Polypectomy
  • Localisation of lesions
  • Removal of foreign bodies
  • Decompression of sigmoid volvulus and colonic pseudo obstruction
  • Balloon dilation of stictures


  • Before starting the procedure intravenous fluids may be given, and your vitals will be checked. 
  • Sedatives will be given to make sure that you do not feel any pain or discomfort
  • Medication may also be given to reduce cramping and bloating
  • You will be required to lie down on your left side or back. 
  • Once you are in the right position, the tube will be inserted via the anus and advanced slowly
  • The procedure will take about 15 minutes to an hour


  • It can help in detecting the early stages of cancer
  • The procedure does not require any incisions or cuts 
  • It is a safe procedure

Meet Our Team

Dr. Manohar Lal Sharma

Associate Director - Gastroenterology