Abstract
LigaSureTM is a vessel sealing system with reduced thermal spread based on bipolar electrocoagulator. A new type of LigaSureTM, LigaSureTM Small Jaw Instrument was used in thyroid surgery. The feature of this handpiece is cutting and abration capabilities. These new functions may contribute to shortening of operation time. We could actually seal most vessels without thermal injury of surrounding tissue and separate tissue in thyroid surgery. This new device was thought to be useful and safe one in thyroid surgery.