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Preoperative highly selective catheter localization of occult small-intestinal hemorrhage with methylene blue dye
M L McDonald1, M B Farnell, A W Stanson
1Department of Surgery, Mayo Clinic, Rochester, Minn.
Insights
Locating the source of obscure small intestine bleeding is challenging. A combined technique using angiography and methylene blue dye injection precisely identified bleeding sites, enabling conservative surgical resection in three patients.
Area of Science:
- Gastroenterology
- Interventional Radiology
- Surgical Oncology
Background:
- Occult lower gastrointestinal bleeding, particularly from the small intestine, presents diagnostic challenges.
- Precise localization of the bleeding source is crucial for effective, conservative surgical intervention.
- Existing diagnostic methods may confirm small bowel bleeding but often lack precision for targeted resection.
Observation:
- Three patients with small intestinal hemorrhage were studied.
- Preoperative highly selective angiographic catheter placement was utilized.
- Intraoperative methylene blue dye injection was employed to pinpoint the bleeding source.
Findings:
- The combined preoperative angiography and intraoperative methylene blue dye injection technique successfully and precisely located the source of small intestinal hemorrhage.
- This method facilitated a conservative surgical resection of the affected small intestine segment.
- The technique proved effective in all three presented cases.
Implications:
- This combined diagnostic and localization technique offers a valuable approach for managing obscure small bowel bleeding.
- It enables more precise surgical targeting, potentially reducing the extent of resection and improving patient outcomes.
- The authors recommend incorporating this technique into the surgical armamentarium for managing small intestinal hemorrhage.
Abstract:
In patients with occult lower gastrointestinal bleeding, locating of the source of the hemorrhage can be quite difficult. While multiple diagnostic tests may confirm a small bowel source of bleeding, precise localization allowing a directed, conservative surgical resection may be problematic. We describe three patients each of whom presented with hemorrhage from the small intestine. The preoperative use of highly selective angiographic catheter placement combined with intraoperative methylene blue dye injection allowed us to precisely locate the source of hemorrhage and to resect a conservative length of small intestine. This technique has been successful in the three patients herein, and we believe that it should be included in the options available to the surgeon.