| 摘要 |
A surgical scalpel (60) capable of making a controlled depth and width incision for inserting a trocar during endoscopic surgery. The scalpel (60) includes a handle (61) and a shield (62) slidably mounted on the handle between an extended position and a retracted position. When the shield is in the retracted position, a predetermined portion of a blade (80) mounted on the handle extends beyond the distal end (73) of the shield. The portion of blade extending beyond the distal end (73) of the shield is correlated to the position of the shank (63) in the shield so that a controlled depth and width incision can be made using the portion of the blade extending beyond the distal end of the shield. The distal end of the shield, therefore, provides a means for stopping the further insertion of the blade into a cavity wall and causes a predetermined depth and width starter incision to be made. |
