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Akashi Fujita 2 Articles
22-gauge Co-Cr versus stainless-steel Franseen needles for endoscopic ultrasound-guided tissue acquisition in patients with solid pancreatic lesions
Yuki Tanisaka, Masafumi Mizuide, Akashi Fujita, Ryuhei Jinushi, Rie Shiomi, Takahiro Shin, Kei Sugimoto, Tomoaki Tashima, Yumi Mashimo, Shomei Ryozawa
Clin Endosc 2024;57(2):237-245.   Published online January 26, 2024
Graphical AbstractGraphical Abstract AbstractAbstract PDFPubReaderePub
/Aims: Endoscopic ultrasound-guided tissue acquisition (EUS-TA) using Franseen needles is reportedly useful for its high diagnostic yield. This study compared the diagnostic yield and puncturing ability of EUS-TA using 22-gauge cobalt-chromium (CO-Cr) needles with those of stainless-steel Franseen needles in patients with solid pancreatic lesions.
Outcomes were compared between the 22-gauge Co-Cr Franseen needle (December 2019 to November 2020; group C) and stainless-steel needle (November 2020 to May 2022; group S).
A total of 155 patients (group C, 75; group S, 80) were eligible. The diagnostic accuracy was 92.0% in group C and 96.3% in group S with no significant intergroup differences (p=0.32). The rate of change in the operator (from training fellows to experts) was 20.0% (15/75) in group C and 7.5% (6/80) in group S. Stainless-steel Franseen needles showed less inter-operator difference than Co-Cr needles (p=0.03).
Both Co-Cr and stainless-steel Franseen needles showed high diagnostic ability. Stainless-steel Franseen needles are soft and flexible; therefore, the range of puncture angles can be widely adjusted, making them suitable for training fellows to complete the procedure.
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Single-balloon enteroscopy-assisted endoscopic retrograde cholangiopancreatography in patients with surgically altered anatomy: a technical review
Yuki Tanisaka, Masafumi Mizuide, Akashi Fujita, Rie Shiomi, Takahiro Shin, Kei Sugimoto, Shomei Ryozawa
Clin Endosc 2023;56(6):716-725.   Published online April 17, 2023
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Endoscopic retrograde cholangiopancreatography (ERCP) in patients with surgically altered anatomy is technically challenging. For example, scope insertion, selective cannulation, and intended procedures, such as stone extraction or stent placement, can be difficult. Single-balloon enteroscopy (SBE)-assisted ERCP has been used to effectively and safely address these technical issues in clinical practice. However, the small working channel limits its therapeutic potential. To address this shortcoming, a short-type SBE (short SBE) with a working length of 152 cm and a channel of 3.2 mm diameter has recently been introduced. Short SBE facilitates the use of larger accessories to complete certain procedures, such as stone extraction or self-expandable metallic stent placement. Despite the development in the SBE endoscope, various steps have to be overcome to successfully perform such procedure. To improve success, the challenging factors of each procedure must be identified. At the same time, endoscopists need to be mindful of adverse events, such as perforation, which can arise due to adhesions specific to the surgically altered anatomy. This review discussed technical tips regarding SBE-assisted ERCP in patients with surgically altered anatomy to increase success and reduce the risk of adverse events associated with ERCP.


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  • Advanced technical tips and recent insights in ERCP using balloon‐assisted endoscopy
    Masaaki Shimatani, Toshiyuki Mitsuyama, Takeshi Yamashina, Masahiro Takeo, Shunsuke Horitani, Natsuko Saito, Hironao Matsumoto, Masahiro Orino, Masataka Kano, Takafumi Yuba, Takuya Takayama, Tatsuya Nakagawa, Shoji Takayama
    DEN Open.2024;[Epub]     CrossRef
  • Efficacy of texture and color enhancement imaging for short‐type single‐balloon enteroscopy‐assisted biliary cannulation in patients with Roux‐en‐Y gastrectomy: Multicenter study (with video)
    Yuki Tanisaka, Mamoru Takenaka, Masafumi Mizuide, Akashi Fujita, Ryuhei Jinushi, Takahiro Shin, Kei Sugimoto, Ken Kamata, Kosuke Minaga, Shunsuke Omoto, Tomohiro Yamazaki, Shomei Ryozawa
    Digestive Endoscopy.2024;[Epub]     CrossRef
  • Development and evaluation of artificial organ models for ERCP training in patients with surgically altered anatomies
    Kai Koch, Benedikt Duckworth-Mothes, Ulrich Schweizer, Karl-Ernst Grund, Tom G. Moreels, Alfred Königsrainer, Dörte Wichmann
    Scientific Reports.2023;[Epub]     CrossRef
  • Simplified single-session EUS-guided transhepatic antegrade stone removal for management of choledocholithiasis in patients with surgically altered anatomy
    Tingting Yu, Suning Hou, Haiming Du, Wei Zhang, Jiao Tian, Yankun Hou, Jun Yao, Senlin Hou, Lichao Zhang
    Gastroenterology Report.2023;[Epub]     CrossRef
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