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Knitted nitinol stent insertion for various intestinal stenoses with a modified delivery system
1Third Department of Internal Medicine and Division of Digestive Endoscopy, Toho University School of Medicine, Ohashi Hospital, Tokyo, Japan.
Gastrointestinal Endoscopy
|August 28, 2001
Summary
A modified delivery system allows successful placement of blunt-ended metallic stents in the gastrointestinal tract, relieving malignant obstructions. This technique avoids major complications, enabling patients to eat again.
Area of Science:
- Gastroenterology
- Medical Devices
- Interventional Endoscopy
Background:
- Esophageal stent placement is established, but challenging in other GI tract locations.
- Sharp-ended metal stents pose risks in the GI tract.
- Current blunt-ended stents are limited to esophageal use due to short delivery systems.
Purpose of the Study:
- To evaluate a modified delivery system for blunt-ended metallic stents in malignant intestinal obstructions.
- To assess the safety and efficacy of intestinal stent placement.
Main Methods:
- The Ultraflex delivery system was extended to over 150 cm.
- Knitted nitinol stents (18-23 mm diameter, 10-15 cm length) were used.
- The modified system was used in 10 patients with gastric outlet, jejunal, or colonic obstruction.
Main Results:
- Successful stent insertion in all patients, relieving symptoms and restoring oral intake.
- One patient required a second stent due to initial stent bending.
- No major complications such as migration or perforation were observed.
Conclusions:
- The modified technique facilitates blunt-ended metallic stent placement in the duodenum, small intestine, and proximal colon.
- Longer delivery devices for blunt-ended stents are recommended for manufacturers.