Abstract
We have developed multi-degrees of freedom forceps which has one degree of bending and one degree of tip rotation freedom with small USAD used in laparoscopic surgery. However, the original USAD whose diameter is 12mm and length is 57mm is still large for laparoscopic surgery. In this study, we developed a small USAD with a diameter of 8mm and a length of 35.5mm, which has a vibration speed of 6m/s at the resonant frequency of more than 100 kHz. Ex-vivo experiment is performed and at the vibration velocity of 5m/s in which meat materials can be successfully cut off.
