| 摘要 |
A surgical knife assembly in which the handle portion tapers down and is truncated obliquely at a selected angle to form a blade guard surface. The blade of this knife has a dull edge and a sharpened edge which meet in a point with an acute included angle. This blade is affixed to the blade guard surface so that the dull edge of the blade intersects the straight edge of the blade guard surface with the side portions of the blade being perpendicular to that same straight edge. In addition, when the blade is affixed to the blade guard surface, the dull edge of the blade is mounted so that it is substantially parallel to the major axis of the handle. To insert the blade in the surface where the incision is to be made, the knife is designed so that the user will hold the surgical knife so that the guard surface is substantially parallel to the surface to be cut. By orienting the knife in this way, the point of entrance of the knife is clearly visible and the blade guard surface will limit the initial depth of cut by preventing the handle of the knife from following the blade into the incision. Once in place, the user continues the incision by drawing the knife toward them by bending the fingers at the same time maintaining the straight edge of the guard surface in contact with the surface in which the incision is being made. By maintaining this contact between the surface being cut and the straight edge the depth of the incision continues to be limited since this straight edge extends to either side of the blade and acts as a pivot point around which the handle of the knife rotates as the knife is drawn toward the user.
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