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Gleneagles Medical Centre, 6 Napier Road, Suite #03-13, Singapore 258499
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There are at least 3 groups of people who should go for colonoscopy:

  • People who have any of the symptoms suggestive of colorectal cancer
    • Bleeding
    • Increasing constipation
    • Diarrhea
    • Decrease in stool caliber
    • Abdominal distension
  • People who have a family history of colorectal cancer
  • People who are 50 years old or more (screening)

Preparation for Colonoscopy

There is minimal preparation for colonoscopy procedure. Patient will be given small amount of laxative to clear the large intestine. Colonoscopy can be performed about 4 hours after taking the laxative. During this period of preparation, patient can continue to take small amount of clear liquid but no food is allowed.

What to expect during Colonoscopy procedure


  • Patients have to check into the Endoscopy Centre 30 minutes before the colonoscopy
  • An injection of sedatives will be given just before the start of the colonoscopy

During the procedure

  • Patient will be in deep sleep before starting the colonoscopy
  • The colonoscopy will take about 10 to 15 minutes
  • Any polyps found during the colonoscopy will be removed immediately


  • Patient will be fully awake about 15 to 30 minutes after the colonoscopy
  • Patients will be discharged from the Endoscopy Centre thereafter
  • The colorectal surgeon will explain about the result of the colonoscopy in the same day

Colonoscopy involves minimal risk

Perforation of the colon occurs in less than 0.05% of all the colonoscopy. The risk is lower if colonoscopy procedure is performed by specialist skilled in colonoscopy.

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