Ottawa Bowel Preparation Scale

The Ottawa Bowel Preparation Scale is used to assess a patient's bowel preparation for colonoscopies.^[1]

Scoring bowel preparation

The scale assesses three components of the large intestine: (1) the rectosigmoid colon, (2) the mid colon and (3) the right colon. A maximum score of 4 is used for each section of the large intestine. A score of 0 is given if the bowel preparation is excellent, meaning the mucosal detail is visible, there is no fluid and almost no stool. A score of 1 is given if the bowel preparation is good, meaning there is turbid fluid/stool but the mucosa is visible and wash/suction is not needed. A score of 2 is given if the bowel preparation is fair, meaning there is fluid/stool obscuring the mucosa, suction is needed but wash is not needed. A score of 3 is given if the bowel preparation is poor, meaning that stool obscures the mucosa and suctioning/washing only provides an OK mucosa view. A score of 4 is given if the bowel preparation is inadequate, meaning that stool obscures the mucosa despite major washing/suctioning. The total score is calculated by adding up all 3 scores. The scale has a range from 0 (perfect) to 14 (solid stool in each section and lots of fluid, i.e., a completely unprepared colon).^[2]

Other validated preparation scales are the Aronchick Scale and the Boston Bowel Preparation Scale.^[3]

References

^ Rostom A, Jolicoeur E (April 2004). "Validation of a new scale for the assessment of bowel preparation quality". Gastrointest Endosc. 59 (4): 482–6. doi:10.1016/s0016-5107(03)02875-x. PMID 15044882.
^ Lawrance, I. C.; Willert, R. P.; Murray, K. (2013-04-01). "A Validated Bowel-Preparation Tolerability Questionnaire and Assessment of Three Commonly Used Bowel-Cleansing Agents". Digestive Diseases and Sciences. 58 (4): 926–935. doi:10.1007/s10620-012-2449-0. ISSN 1573-2568.
^ Kastenberg D, Bertiger G, Brogadir S (July 2018). "Bowel preparation quality scales for colonoscopy". World J Gastroenterol. 24 (26): 2833–2843. doi:10.3748/wjg.v24.i26.2833. PMC 6048432. PMID 30018478.

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[1] Rostom A, Jolicoeur E (April 2004). "Validation of a new scale for the assessment of bowel preparation quality". Gastrointest Endosc. 59 (4): 482–6. doi:10.1016/s0016-5107(03)02875-x. PMID 15044882.

[2] Lawrance, I. C.; Willert, R. P.; Murray, K. (2013-04-01). "A Validated Bowel-Preparation Tolerability Questionnaire and Assessment of Three Commonly Used Bowel-Cleansing Agents". Digestive Diseases and Sciences. 58 (4): 926–935. doi:10.1007/s10620-012-2449-0. ISSN 1573-2568.

[3] Kastenberg D, Bertiger G, Brogadir S (July 2018). "Bowel preparation quality scales for colonoscopy". World J Gastroenterol. 24 (26): 2833–2843. doi:10.3748/wjg.v24.i26.2833. PMC 6048432. PMID 30018478.

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