佐久間文先生の症例報告が、DEN open誌（Journal Citation Reports Impact Factor 2025 = 1.5）にpublishされました。

DEN Open. 2026 Aug 11;7(1):e70399. doi: 10.1002/deo2.70399. eCollection 2027 Apr.

A Novel Biliary Plastic Stent With a Centrally Located Flap: Initial Clinical Experience in Three Cases

Fumi Sakuma, Atsushi Irisawa, Takumi Maki, Ken Kashima, Yasuhito Kunogi, Koh Fukushi, Shogo Yamamoto, Yasunori Inaba, Ryuichi Maki, Akira Yamamiya

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PMID: 42582640 PMCID: PMC13458461 DOI: 10.1002/deo2.70399

Abstract
Endoscopic biliary plastic stent (PS) insertion is standard for maintaining bile flow, but migration and dislodgement persist as important challenges. We developed the cross range flap stent (CRF stent), a 7 Fr, 7 cm straight-type PS. Unlike conventional stents with flaps at both ends, the CRF stent features flaps and flap holes at the intestinal end and the center to improve stability and to prevent migration. This report describes three consecutive early cases for which the CRF stent was used for distal malignant biliary stricture caused by pancreatic cancer, acute cholangitis caused by common bile duct stones, and prevention of cholangitis after endoscopic papillectomy. In all cases, the CRF stent was placed easily using its integrated delivery system. No migration or occlusion was observed during the observation periods. The unique centrally located flap appears to be particularly effective for short obstructions and for various clinical conditions. Further largescale comparative studies must be conducted, but the CRF stent has shown potential to minimize stentrelated adverse events.

Keywords: biliary obstruction; biliary stricture; common bile duct stone; migration; plastic stent.

https://pubmed.ncbi.nlm.nih.gov/42582640/