Analysis of the relationship between double-balloon enteroscopy docking success rates and lesion detection rates: a single-center retrospective study
This single-center retrospective study of 125 patients demonstrates that successful double-balloon enteroscopy docking is significantly associated with higher overall small intestine lesion detection rates, although this advantage was not statistically significant for specific subgroups such as unexplained gastrointestinal bleeding, ulcers, or tumors.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
The human small intestine is a long, winding tube hidden deep inside the body, making it one of the most difficult places for doctors to examine. Because it is so deep and moves constantly, standard cameras used for the stomach or colon often cannot reach the middle sections where problems might hide. For years, this created a blind spot in digestive medicine. To solve this, doctors developed a specialized tool called a double-balloon enteroscope. This device uses two inflatable balloons to grip the intestine and pull the scope forward, allowing a doctor to navigate deep into the small bowel. The ultimate goal of using two of these scopes at once—one entering through the mouth and one through the lower end of the digestive tract—is to meet in the middle. When the two scopes successfully connect, or "dock," inside the intestine, the doctor can see the entire length of the organ without missing any spots.
A team of researchers at the Affiliated Hospital of Inner Mongolia Medical University in China set out to understand how often this meeting actually happens and whether it truly matters for finding diseases. They looked back at the records of 125 patients who had undergone this procedure between March 2024 and July 2025. The team wanted to know if patients whose doctors managed to connect the two scopes inside their bodies were more likely to have a problem found than those whose doctors had to stop before the scopes met. They focused on three common reasons for the procedure: unexplained bleeding, sores or ulcers in the intestine, and tumors.
The study revealed that the meeting of the two scopes was not guaranteed. Out of the 125 patients, the doctors successfully connected the scopes in only 48 cases, which is about 38 percent of the time. In the remaining 77 cases, the scopes did not meet. When the researchers compared the results, they found a clear difference in how often diseases were discovered. In the group where the scopes successfully met, doctors found a problem in nearly 80 percent of the patients. In the group where the scopes did not meet, problems were found in just over half of the patients. This difference was significant enough to suggest that the ability to see the whole intestine directly improves the chances of finding what is wrong.
The benefit of a successful connection was most obvious in patients suffering from unexplained bleeding. For these patients, the doctors found the source of the bleeding in almost all cases where the scopes met, compared to a lower rate when they did not. This makes sense because bleeding spots can be tiny and located anywhere along the long intestine; seeing the entire tube without blind spots gives the doctor the best chance to spot them. For patients with ulcers or tumors, the doctors also found more problems when the scopes met, but the difference was not as statistically strong as it was for bleeding. This may be because ulcers and tumors are often larger or cause symptoms that lead to other tests before the scope is even used, making them easier to find even without a full view of the entire intestine.
Importantly, the researchers checked whether trying to connect the scopes made the experience harder or more expensive for the patient. They found no difference in how long patients stayed in the hospital, the cost of their care, or the number of complications that occurred. This suggests that aiming for a full connection does not add extra risk or burden. The study concludes that while it is not always possible to connect the two scopes, making that effort is a valuable goal. It significantly increases the likelihood of finding the cause of a patient's illness, especially when the problem is hidden bleeding, without making the procedure more dangerous or costly.
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