Punch-type surgical instrument for skin incision, set of parts for making such an instrument of selectably variable size, and blade unit for such instrument

摘要

A punch-type surgical instrument for skin incision along a closed line, such as a substantially elliptical line, includes a handle, a blade unit and a means for attaching the handle to the blade unit in a way achieving high stability between the handle and blade unit and which nevertheless allows the two parts to be made as ones easily connectable to and disconnectable from one another. The blade unit may be made and furnished in different sizes to cause the instrument to be one selectably variable in size.