In performing sharp cervical conization, one is often handicapped by blood obscuring the field, as well as the tendency of the blade to cut at uneven depths. The instrument * here described overcomes these faults. It consists of a hollow cone, open at the base, that attaches to a standard Bard Parker scalpel by a turn of a thumbscrew. The blade lies in a slot that runs the length of the cone, so that the specimen escapes into the cone as it is cut, and is constantly visible through the open base. Thus the surgeon always knows just what he is getting.
The slot spacing of about 2 mm. procures specimens of uniform thickness which appear like a thick graft as they come into view. If greater depth is required, repeated sections are taken, although this is not generally necessary.
Blood is excluded from the cone during the cutting process because