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Bowel preparation before colonoscopy in adults

Authors
Yousif I A-Rahim, MD, PhD
Myron Falchuk, MD
Section Editor
John R Saltzman, MD, FACP, FACG, FASGE, AGAF
Deputy Editor
Kristen M Robson, MD, MBA, FACG

INTRODUCTION

A successful colonoscopy requires an adequate preparation of the large bowel that facilitates clear visualization of the mucosal surface. The effectiveness of the bowel preparation is a critical factor related to the safety, diagnostic accuracy, quality, difficulty, and speed of the examination.

This topic will discuss the methods for bowel preparation for outpatient colonoscopy and will provide recommendations for addressing commonly encountered problems. An overview of colonoscopy in adults is discussed separately. (See "Overview of colonoscopy in adults".)

The approach to bowel preparation for colonoscopy in the setting of acute gastrointestinal bleeding is discussed separately. (See "Approach to acute lower gastrointestinal bleeding in adults", section on 'Colonoscopy'.)

The recommendations that follow are generally consistent with a 2014 guideline from the US Multi-Society Task Force on Colorectal Cancer and a 2015 guideline from the American Society of Gastrointestinal Endoscopy [1,2].

IMPORTANCE OF ADEQUATE BOWEL PREPARATION

The adequacy of the bowel preparation has a significant impact on the quality of the colonoscopy, but the prep is inadequate in up to 25 percent of examinations [3,4]. Inadequate bowel preparation may [5,6]:

                                                              
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Literature review current through: Nov 2017. | This topic last updated: Jun 01, 2017.
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