Study brings standardized bowel prep scoring to canine colonoscopy
Bottom line
Dogs undergoing colonoscopy may now have a more standardized way to judge whether bowel prep was actually good enough for a diagnostic exam. A new retrospective study in the American Journal of Veterinary Research evaluated a prep protocol built around at-home clear broth plus polyethylene glycol 3350, followed by colonic flushing immediately before colonoscopy, and scored cleanliness with the Boston Bowel Preparation Scale, or BBPS, a human endoscopy tool that grades the right, transverse, and left colon separately. The study came from a single referral center and focused on dogs with complete colonoscopy video documentation, adding a more structured framework to an area where veterinary prep quality has often been described less consistently. (pubmed.ncbi.nlm.nih.gov)
Why it matters: For veterinary teams, this is less about a new drug or device and more about quality control. In human gastroenterology, BBPS is a validated, widely used measure, and adequacy thresholds are tied to exam quality and lesion detection. Bringing that kind of segment-by-segment scoring into canine colonoscopy could help practices compare protocols more objectively, document whether visualization was truly adequate, and decide when a limited exam may need to be interpreted more cautiously. That’s especially relevant because prior veterinary literature has shown bowel prep method can materially affect colon cleansing quality, and newer canine work has continued to adapt human-style scoring approaches for endoscopy prep assessment. (pubmed.ncbi.nlm.nih.gov)
What to watch: Whether the BBPS becomes more widely adopted in veterinary endoscopy studies, and whether prospective, multicenter work links canine BBPS scores to biopsy yield, lesion detection, procedure time, or repeat-exam decisions. (pubmed.ncbi.nlm.nih.gov)
Key facts
- Study type
- Retrospective
- Journal
- American Journal of Veterinary Research
- Population
- Dogs undergoing colonoscopy
- Prep protocol
- At-home clear broth and polyethylene glycol 3350, followed by colonic flushing immediately before colonoscopy
- Scoring system
- Boston Bowel Preparation Scale (BBPS)
- BBPS use
- Scores the right, transverse, and left colon separately
- Study setting
- Single referral center
- Study inclusion
- Dogs with complete colonoscopy video documentation
A new American Journal of Veterinary Research study puts a standardized score behind a familiar clinical problem: was a dog’s colon actually clean enough for a reliable colonoscopy? The investigators assessed a bowel preparation protocol using at-home clear broth and polyethylene glycol 3350, followed by colonic flushing immediately before the procedure, and evaluated cleanliness with the Boston Bowel Preparation Scale, or BBPS. The work appears to mark a more formal application of a validated human colonoscopy scoring system to canine practice. (pubmed.ncbi.nlm.nih.gov)
That matters because bowel prep has long been recognized as a limiting factor in veterinary lower GI endoscopy. Older canine research found that oral polyethylene glycol-based lavage produced significantly better cleansing than multiple enemas alone, and later work comparing oral low-volume sodium phosphate with polyethylene glycol controls also favored PEG for colon cleansing quality. More recently, investigators have tested adapted canine prep protocols using agents such as sodium picosulfate and magnesium citrate, again underscoring that prep quality remains an active area of refinement rather than a settled standard. (pubmed.ncbi.nlm.nih.gov)
The BBPS itself brings a useful structure. Developed and validated in human medicine, it scores three colonic segments after cleansing maneuvers are completed, rather than simply judging the bowel before washing and suctioning. Human studies have shown the scale is reliable between observers, and later validation work tied better segment scores to clinically meaningful outcomes, including higher polyp detection. In broader human guidance, a total BBPS score of at least 6, with each segment scoring at least 2, is commonly used as a benchmark for an adequate examination. That threshold isn’t automatically transferable to dogs, but it gives veterinary researchers a shared language and a starting point for defining adequacy. (pubmed.ncbi.nlm.nih.gov)
Based on the journal abstract, this new canine study was retrospective, single-center, and limited to dogs with complete colonoscopy video documentation. That design supports detailed review of mucosal visualization, but it also means the findings should be read as an assessment of protocol performance in a referral setting, not yet as a universal standard. The protocol itself, combining home-administered clear broth and PEG 3350 with immediate pre-procedure colonic flushing, reflects the practical reality that prep success depends on both pet parent compliance before admission and in-hospital technique on procedure day. (pubmed.ncbi.nlm.nih.gov)
I didn’t find published third-party commentary specifically reacting to this AJVR paper, but the surrounding literature points in the same direction: veterinary endoscopy would benefit from more standardized reporting of prep quality. Human GI societies emphasize bowel cleanliness as a core quality metric, and veterinary publications on colonoscopy preparation have repeatedly highlighted how technique affects visualization. Taken together, that suggests this study’s biggest contribution may be methodological as much as clinical, giving future canine colonoscopy studies a reproducible way to compare protocols across centers. (els-jbs-prod-cdn.jbs.elsevierhealth.com)
Why it matters: For veterinary professionals, standardized bowel prep scoring could improve both clinical decision-making and research quality. If a colonoscopy is nondiagnostic because one segment is poorly visualized, a segment-based score is more informative than a general note that prep was “fair” or “good.” Over time, that could help internists and endoscopy teams correlate prep quality with biopsy adequacy, lesion detection, anesthesia time, and the need for repeat procedures. It may also make it easier to counsel pet parents on why strict prep instructions matter, especially when at-home PEG-based protocols are part of the plan. (pubmed.ncbi.nlm.nih.gov)
There’s also a quality assurance angle. Human guidance treats bowel prep adequacy as a measurable performance indicator at the unit level, not just a patient-level inconvenience. Veterinary referral centers may eventually take a similar approach, using standardized scores to audit prep protocols, technician workflows, and client instructions. That could be particularly useful in chronic enteropathy workups or surveillance cases where incomplete visualization can change interpretation and follow-up planning. (els-jbs-prod-cdn.jbs.elsevierhealth.com)
What to watch: The next step is prospective validation in dogs, ideally across multiple centers, to determine what BBPS score truly defines an adequate canine exam and whether higher scores improve diagnostic yield, shorten procedure time, or reduce repeat colonoscopies. Until then, this study looks most important as a push toward common standards in a technically sensitive part of veterinary gastroenterology. (pubmed.ncbi.nlm.nih.gov)