A New Peroral Cholecystoscopy Method Utilizing a Shape Memory Alloy Bending Catheter‐Report of Two Cases

Kenji YAMAO, Saburo NAKAZAWA, Jyunji YOSHINO, Kazuo EVUI, Hitoshi YAMACHIKA, Naoto KANEMAKI, Masao FUJDIOTO, Hironao MIYOSHI, Teruhiko IWASE, Norihito TAKI

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

For the purpose of improving the ease and reliability of catheter insertion into the cystic duct and gallbladder, we developed a new combination method utilizing an ultrathin fiberscope (miniscope, 0.8 mm), a guidewire (0.25 inches) and a shape memory alloy, bendable, catheter (SMA catheter, 2.6 mm). The main feature of the SMA catheter, which incorporates a micro‐actuator, is that its tip can be bent by remote control as desired. The SMA catheter could be inserted successfully into the cystic duct using a guide‐wire under direct miniscope vision in two patients with gallbladder lesions. Moreover, after the miniscope had been inserted through the SMA catheter into the gallbladder, its maneuverability enhanced observation of the mucosa. This combination method should afford new diagnostic and therapeutic approaches to gallbladder disease.

Original languageEnglish
Pages (from-to)301-305
Number of pages5
JournalDigestive Endoscopy
Volume7
Issue number3
DOIs
Publication statusPublished - 07-1995

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Gastroenterology

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