| 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. |
