A manual of practical obstetrics . Veetis. Short forceps (Denmans). of artificial hand, in promoting flexion, rotation, and extension,when necessary in the mechanism of labor. As a tractor, ithas become obsolete since the invention of forceps. The forceps is a sort of pincers whose blades, like a pair of BLUNT INSTRUMENTS. 245 artificial hands, grasp the head and draw it through the pelviccanal. The instrument is composed of the blades proper (whichgrasp the head), the lock (where the two halves of the instru-ment cross each other and are locked together), the shank Fig. 101. Fig. Long f
A manual of practical obstetrics . Veetis. Short forceps (Denmans). of artificial hand, in promoting flexion, rotation, and extension,when necessary in the mechanism of labor. As a tractor, ithas become obsolete since the invention of forceps. The forceps is a sort of pincers whose blades, like a pair of BLUNT INSTRUMENTS. 245 artificial hands, grasp the head and draw it through the pelviccanal. The instrument is composed of the blades proper (whichgrasp the head), the lock (where the two halves of the instru-ment cross each other and are locked together), the shank Fig. 101. Fig. Long forceps (Hodges) Simpsons long forceps. (placed between the lock and blades to give length to thecontrivance), and the handles (which are held bv the operator).The two halves of the instrument are separately known as the 246 right and left blades, called also upper and lower,and male and female blades. Forceps are either short or long. The short forceps,called also straight, have only one curve—the cranial curve,which adapts them to fit the cranium. They are only usedwhen the head is at the inferior strait or low down in thecavity of the pelvis. (See Fig. 100, page 244.) The long forceps, beside the cranial have also a pelvic or sacral curve, by which they conform to the axis of thepelvic canal. (Figs. 101 and 102, page 245.) They may beapplied at almost any part of the pelvis. Action of Forceps.—They_iict_chietly as tractors; slightlyas compressors; scarcely at all as levers. They are aids to, orsubstitutes for, uterine contraction. They occupy but littlespace, owing to proj
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