Fig. 2—Scalpels
Knives. The large section- or cartilage-knife is the most important cutting instrument used in autopsy work. It is a strong, heavy knife 20-22 cms. long, with handle and blade of about equal length. The blade has a heavy back, a bluntly rounded rather than a sharp point (more blunt than appears in the illustration), and bellies at its anterior third, narrowing toward the handle. In its widest part the blade should measure about 1¾ cms. The handle is heavy, 1½ cms. broad, and a little over 1 cm. in thickness toward the blade, gradually diminishing to about ¾ cm. at the posterior third, then increasing to 1 cm. toward the end. This variation in thickness gives a gentle curve to the handle that is of great importance in adapting the latter to the form of the closed hand, so that the knife becomes practically a cutting extension of the fore-arm. With this knife all the chief incisions are made, and it is rarely out of the hands of the operator during the autopsy. The handle or blade may be made shorter or longer according to preference, but the other features of the instrument are most important.
Scalpel. (See Fig. [2].) A number of dissecting scalpels of varying sizes are needed for finer dissections. They should have a metal handle, and are preferably of one-piece construction.
Long Section- or Brain-Knife. In place of the broad thin brain-knife usually advised, an amputation-knife can be used to much better advantage in the section of the brain and in making the chief incisions in the large organs. It should have a sharp point rather than a blunt one.
Fig. 3—Long Section Knife
Myelotome. This is used only for the purpose of cutting the spinal cord squarely across in the removal of the brain. It has a slender steel stalk with wooden handle, and a short, thin, narrow blade set obliquely at the end of the stalk. This instrument is not absolutely necessary, as the cord may be satisfactorily cut with the point of the long section knife.
Fig. 4—Myelotome
Scissors. (See Fig. [5].) A number of these are of service: one large and strong pair with long handles and short stout blades, another large pair curved or bent with the longer blade blunt- or probe-pointed, a small pair with a narrow, probe-pointed blade for opening small vessels or ducts.