According to several experts who spoke at the American Gastroenterological Association’s Postgraduate Course this spring, which was offered at Digestive Disease Week (DDW), gastroenterologists can take these five steps to improve their performance: Addressing poor bowel prep, improving polyp detection, following the best intervals for polyp surveillance, reducing the environmental impact of gastrointestinal (GI) practice, and implementing artificial intelligence (AI) tools for efficiency and quality.
Addressing Poor Prep
To improve bowel preparation rates, clinicians may consider identifying those at high risk for inadequate prep, which could include known risk factors such as age, body mass index, inpatient status, constipation, tobacco use, and hypertension. However, other variables tend to serve as bigger predictors of inadequate prep, such as the patient’s status regarding cirrhosis, Parkinson’s disease, dementia, diabetes, opioid use, gastroparesis, tricyclics, and colorectal surgery.
Although several prediction models are based on some of these factors — looking at comorbidities, antidepressant use, constipation, and prior abdominal or pelvic surgery — the data don’t indicate whether knowing about or addressing these risks actually leads to better bowel prep, said Brian Jacobson, MD, associate professor of medicine at Harvard Medical School, Boston, and director of program development for gastroenterology at Massachusetts General Hospital in Boston.
Instead, the biggest return-on-investment option is to maximize prep for all patients, he said, especially since every patient has at least some risk of poor prep, either due to the required diet changes, medication considerations, or purgative solution and timing.
Massachusetts General Hospital
Dr. Brian Jacobson
To create a state-of-the-art bowel prep process, Dr. Jacobson recommended numerous tactics for all patients: Verbal and written instructions for all components of prep, patient navigation with phone or virtual messaging to guide patients through the process, a low-fiber or all-liquid diet on the day before colonoscopy, and a split-dose 2-L prep regimen. Patients should begin the second half of the split-dose regimen 4-6 hours before colonoscopy and complete it at least 2 hours before the procedure starts, and clinicians should use an irrigation pump during colonoscopy to improve visibility.
Beyond that, Dr. Jacobson noted, higher risk patients can take a split-dose 4-L prep regimen with bisacodyl, a low-fiber diet 2-3 days before colonoscopy, and a clear liquid diet the day before colonoscopy. Using simethicone as an adjunct solution can also reduce bubbles in the colon.
Future tech developments may help clinicians as well, he said, such as using AI to identify patients at high risk and modifying their prep process, creating a personalized prep on a digital platform with videos that guide patients through the process, and using a phone checklist tool to indicate when they’re ready for colonoscopy.
Improving Polyp Detection
Adenoma detection rates (ADR) can be highly variable due to different techniques, technical skills, pattern recognition, interpretation, and experience. New adjunct and AI-based tools can help improve ADR, especially if clinicians want to improve, receive training, and use best-practice techniques.
“In colonoscopy, it’s tricky because it’s not just a blood test or an x-ray. There’s really a lot of technique involved, both cognitive awareness and pattern recognition, as well as our technical skills,” said Tonya Kaltenbach, MD, professor of clinical medicine at the University of California San Francisco and director of advanced endoscopy at the San Francisco VA Health Care System in San Francisco.
For instance, multiple tools and techniques may be needed in real time to interpret a lesion, such as washing, retroflexing, and using better lighting, while paying attention to alerts and noting areas for further inspection and resection.
San Francisco VA Health Care System
Dr. Tonya Kaltenbach
“This is not innate. It’s a learned skill,” she said. “It’s something we need to intentionally make efforts on and get feedback to improve.”
Improvement starts with using the right mindset for lesion detection, Dr. Kaltenbach said, by having a “reflexive recognition of deconstructed patterns of normal” — following the lines, vessels, and folds and looking for interruptions, abnormal thickness, and mucus caps. On top of that, adjunctive tools such as caps/cuffs and dye chromoendoscopy can help with proper ergonomics, irrigation, and mucosa exposure.
In the past 3 years, real-world studies using AI and computer-assisted detection have shown mixed results, with some demonstrating significant increases in ADR, while others haven’t, she said. However, being willing to try AI and other tools, such as the Endocuff cap, may help improve ADR, standardize interpretation, improve efficiency, and increase reproducibility.
“We’re always better with intentional feedback and deliberate practice,” she said. “Remember that if you improve, you’re protecting the patient from death and reducing interval cancer.”
Following Polyp Surveillance Intervals
The US Multi-Society Task Force on Colorectal Cancer’s recommendations for follow-up after colonoscopy and polypectomy provide valuable information and rationale for how to determine surveillance intervals for patients. However, clinicians still may be unsure what to recommend for some patients — or tell them to come back too soon, leading to unnecessary colonoscopy.
For instance, a 47-year-old woman who presents for her initial screening and has a single 6-mm polyp, which pathology returns as a single adenoma may be considered to be at average risk and suggested to return in 7-10 years. The guidelines seem more obvious for patients with one or two adenomas under 10 mm removed en bloc.
However, once the case details shift into gray areas and include three or four adenomas between 10 and 20 mm, or piecemeal removal, clinicians may differ on their recommendations, said Rajesh N. Keswani, MD, associate professor of medicine at the Northwestern University Feinberg School of Medicine and director of endoscopy for Northwestern Medicine in Chicago. At DDW 2024, Dr. Keswani presented several case examples, often finding various audience opinions.
Dr. Rajesh N. Keswani
In addition, he noted, recent studies have found that clinicians may estimate imprecise polyp measurements, struggle to identify sessile serrated polyposis syndrome, and often don’t follow evidence-based guidelines.
“Why do we ignore the guidelines? There’s this perception that a patient has risk factors that aren’t addressed by the guidelines, with regards to family history or a distant history of a large polyp that we don’t want to leave to the usual intervals,” he said. “We feel uncomfortable, even with our meticulous colonoscopy, telling people to come back in 10 years.”
To improve guideline adherence, Dr. Keswani suggested providing additional education, implementing an automated surveillance calculator, and using guidelines at the point of care. At Northwestern, for instance, clinicians use a hyperlink with an interpreted version of the guidelines with prior colonoscopy considerations. Overall though, practitioners should feel comfortable leaning toward longer surveillance intervals, he noted.
“More effort should be spent on getting unscreened patients in for colonoscopy than bringing back low-risk patients too early,” he said.
