Boston Bowel Preparation Scale (BBPS)
Scores bowel preparation in 3 segments (0–3 each, total 0–9). Assign during withdrawal after washing and suction.
Right colon
Cecum and ascending colon
Solid stool; mucosa not seen
Only part of the mucosa seen; residue or opaque fluid hides the rest
Minor residue, fragments, or opaque fluid; mucosa seen well
No residue. Entire segment mucosa seen
Transverse colon
Includes hepatic and splenic flexures
Solid stool; mucosa not seen
Only part of the mucosa seen; residue or opaque fluid hides the rest
Minor residue, fragments, or opaque fluid; mucosa seen well
No residue. Entire segment mucosa seen
Left colon
Descending colon, sigmoid, and rectum
Solid stool; mucosa not seen
Only part of the mucosa seen; residue or opaque fluid hides the rest
Minor residue, fragments, or opaque fluid; mucosa seen well
No residue. Entire segment mucosa seen
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Decision support only. Follow current guidelines and local protocols. Classification definitions and terminology follow the original publication language.