M.N. Kuzin1, A.M. Subbotin2, A.M. Nechipay3, E.I. Efimova1, O.V. Drobysheva1, A.R. Bogomolov4, I.E. Usyatinskaya5

1Volga District Medical Centre of FMBA of Russia, Nizhny Novgorod

2City Clinical Hospital №13, Nizhny Novgorod

3Russian Medical Academy of Postgraduate Education, Moscow

4City Polyclinic №51, Nizhny Novgorod

5City Clinical Hospital №40, Nizhny Novgorod

Kuzin M.N. ― doctor of the endoscopic department of the City Clinical Hospital №13, chief freelance specialist in endoscopy of the Volga District Medical Centre of FMBA of Russia ul. 20a Marshal Voronov Str., Nizhny Novgorod, Russian Federation, 603074, tel. +7-960-177-71-11, e-mail:


Relevance. Adequate preparation of the colon for colonoscopy is one of the important criteria for the quality of endoscopic research, including the screening of colorectal cancer. At present, there is no generally accepted scale for assessing the quality of bowel preparation for colonoscopy, and the most tested and validated are the Boston Bowel Preparation Scale, Ottawa Bowel Preparation Scale and Aronchick Scale. The proposed version of the estimation scale is an attempt to use the merits of the above scales by integrating them into a single optimized evaluation «tool», as we see Nizhny Novgorod Bowel Preparation Scale (NNBPS).

Objective ― improvement of results of diagnostic/screening colonoscopy through optimization of the conditions of its implementation, achieved through advance of insistence to quality of intestinal preparation for the survey.

Tasks: 1. Perform a critical assessment of the known colon preparation scales for colonoscopy. 2. Identify advantages and disadvantages of the assessed scales, use the result of an analytical evaluation to develop an optimized scale for colon preparation for colonoscopy. 3. Conduct an approbation of the developed scale in real clinical practice by means of a comparative (NNBPS with BBPS) assessment of the quality of bowel preparation for colonoscopy.

Material and methods. Critical analysis of the verified and validated scales of the quality of bowel preparation for colonoscopy made it possible to objectively evaluate the positive and negative aspects of these scales and use the results of such a comparative evaluation in forming the «ideology» of the new scoring scale in which the positive sides of the predecessor scales were integrated. Simultaneously with the development of the optimized scoring scale a clinical approbation of the new project was carried out by a comparative assessment of the quality of bowel preparation for colonoscopy according to the developed and the Boston scale.

Conclusion. The developed scale demonstrates the quality of colon preparation for colonoscopy more fully in contrast with the Boston scale and indirectly weighs on the diagnostic effectiveness of the colonoscopy, providing an opportunity to selectively choice the drugs recommended for such preparation,

Key words: colorectal cancer, colonoscopy, quality of colon preparation, screening colonoscopy, bowel preparation scale.