< Topic >Directing to the operation region of cartridge head of the barrel section, it supplies the coolant continually, it offers retorakuta for operation which can prevent the temperature which is generated while cutting of the bone.SolutionsWhen using the transverse cooling liquid chamber channel 4 was formed on top of inner circumference edge strip 22 of the barrel section 2 which becomes top and bottom direction over full circuit direction, the connecting hose 5 which is concatenated via the supply hose to coolant resource outside was formed on external side of barrel section 2, the connecting hose and the communication path 51 which communicates with the cooling liquid chamber channel were provided. Because the coolant which is supplied to the cooling liquid chamber channel continually on the inner circumference edge strip paralleling, flowing down, flows facing toward the operation place of the cartridge head, flowing from all of the inner circumference edge strip of the barrel section evenly, it is possible to cool operation place.< Choice figure >Drawing 3【課題】筒体部の底部の手術部位に向けて冷却液を連続的に供給し、骨の切削中に発生する高熱を防ぐことができる手術用レトラクターを提供する。【解決手段】使用時に上下方向となる筒体部2の内周側面22の上部に全周方向にわたって横向きの冷却液溜り溝4を形成し、外部の冷却液供給源に供給ホースを通じて連結される連結管5を筒体部2の外部側に形成し、連結管と冷却液溜り溝とを連絡する連通路51を設けた。冷却液溜り溝に連続的に供給された冷却液は内周側面に沿って流下して、その底部の手術箇所に向かって流れるので、筒体部の内周側面の全域から満遍なく流れて手術箇所を冷却することができる。【選択図】図3
