Ultrafine Endoscope for Colonoscopy in Diagnosis of Colorectal Diseases

Ultrafine Endoscope for Unsedated Colonoscopy is an Effective Method to Reduce Abdominal Pain:a Prospective Randomized Study.

This study is the evaluation of ultrafine endoscope (with small caliber and turning radius )for colonoscopy in decreasing abdominal pain of patients . 60 patients will be accepted in this trial.

The aim of this study is to investigate the advantages of an endoscope with smaller turning radius and softer insert section in reducing patients' abdominal pain in colonoscopy. Transnasal gastroscope was selected in this study , because of its small caliber (5.9mm) and small turning radius . Visual analogue scale(VAS),cecum intubation time and cecum intubation rate were evaluated.

Inclusion Criteria:

1. Patients diagnostic colonoscopy;
2. Subjects able to provide informed consent

Exclusion Criteria:

1. Patients with poor bowel preparation;
2. Contraindications of the colonoscopy;
3. Prior partial or complete colectomy