Gastrointestinal Endoscopy


Colorectal cancer is the second leading cause of cancer deaths, and is more common among elders. However, the trend of incidence age has gradually become younger in recent years. If you notice any symptoms of colorectal cancer, i.e. persistent blood in stool, chronic diarrhea or constipation, you should consult your doctor immediately. As colorectal cancer at an early stage may have no obvious symptoms, and colonoscopy is an accurate method to screen asymptomatic patients for colorectal cancer.

Some general gastrointestinal problems such as chronic enteritis, polyps, diverticulosis, and vascular abnormalities can also be diagnosed by colonoscopy. Apart from diagnosis, colonoscopy can also serves as treatment during examination, colon polyps can be removed immediately for further pathological examinations.

Colonoscopy Procedure

Colonoscopy takes about 15 to 30 minutes to perform. You will have to follow the instructions about diet starting from the fourth day before the procedure, and iron supplements and blood-thinning medicines should be avoided.

Before the examination you will take a laxative that will completely empty your large intestine. At the beginning, you will receive a sedative through an intravenous line.

During the procedure, the doctor will insert a lighted fibre tube from the anus to the rectum to examine the inside walls of the colon. If you haven’t experienced any discomfort after procedure, you can start eating and drinking as instructed.

Colonoscopy is considered to be an accurate and safe method for diagnosis of colorectal cancer. There may be complications such as bleeding or the colon to be perforated during the procedure, but these cases are rare. The DVD recording that records the process of the procedure will be provided to clients.


  • Stop taking iron supplements at least 3 to 4 days before examination.
  • Clients with cardiac pacemaker, diabetes, heart diseases, high blood pressure or any kinds of medication, especially anticoagulants or antiplatelet medicines, should inform the doctor in advance.
  • High-fibre foods should be avoided 3 days before examination.
  • The probability of perforation of the colon walls is 1 in 10000, whereas the chance of haemorrhage is 1 in 1000. Therefore, it is important to find a experienced doctor to perform the examination for you.