エキシマレーザーによる冠動脈内手術装置: 冠動脈レーザー内視鏡の開発

抄録

We have been developing coronary laser angioplasty system with excimer laser. And the coronary laser endoscopic system has been developed to realize visual coronary laser angioplasty.
In order to design the coronary laser endoscopic system, various kinds of endoscope were developed experimentally and evaluated with animal experiment using goat to establish the requirement for the coronary laser endoscope.
The requirement for coronary laser endoscope was clarified to be as follows:
1, Diameter: 1.5-1.8mm max (goat, 50kg)
2, Flexibility of the tip: flexibility is required and the combination of guide wire is useful for the successful coronary approach with endoscope.
3, Stiffness of the body: stiffness is required for the better handling.
4, Image fiber: 2000 pixel is possible. Light guide: good
5, Bending function of the tip: 4 direction (at least 1 direction)
6, Cannel: 1 channel for the guide wire and laser fiber passage.
In present time, the bending function of the tip to 4 direction is not developed yet, and the technique of bending mechanism is being studied.