A manual of practical obstetrics . one of the acetabula at the lowerstrait, the same rules may be applied as for correspondingunrotated anterior positions of the occiput. In face cases,however, the chin is apt to be somewhat behind the ace-tabulum, nearer the centre of the ilium, the face and headmore directly transverse in the pelvis, than occurs in vertexpresentations. In these the blades cannot well be applied to FORCEPS IN FACE PRESENTATIONS. 259 the sides of the pelvis, but should be passed, one along the sacro-iliac junction and the other near the opposite acetabulum, soas to grasp the s
A manual of practical obstetrics . one of the acetabula at the lowerstrait, the same rules may be applied as for correspondingunrotated anterior positions of the occiput. In face cases,however, the chin is apt to be somewhat behind the ace-tabulum, nearer the centre of the ilium, the face and headmore directly transverse in the pelvis, than occurs in vertexpresentations. In these the blades cannot well be applied to FORCEPS IN FACE PRESENTATIONS. 259 the sides of the pelvis, but should be passed, one along the sacro-iliac junction and the other near the opposite acetabulum, soas to grasp the sides of the head, and rotation must occur, eitherspontaneously or by the aid imparted by the blades, beforetraction can do any good. When the chin has rotated to the sacrum, delivery by for-ceps is mechanically impossible (see Mechanism of FaceCases, page 202) if the foetus and pelvis are of normal the face is at the superior strait, or high up in thepelvic cavity, and circumstances require delivery to be has- FlG. Forceps in face presentation at outlet. tened, version must be preferred to forceps. And when ver-sion cannot be accomplished, the only remaining resorts arecraniotomy and Cesarean section. 260 INSTRUMENTS, FORCEPS, ETC. Forceps to the After-coming Head in Breech Cases.—When the several manipulations already described (see page217) for delivery in these cases fail, forceps may be tried. In the more common cases in which occiput has rotated topubes and forehead to sacrum, the body of the child is liftedup toward the mons veneris, and the blades are applied oneon each side of the head, as before described, the handlesbeing first depressed toward the perineum, especially when thehead is high up, but made to follow the body toward the monsveneris, as the chin, face, and forehead successively emergeover the coccyx. When the occiput has rotated to the sacrum, the directionin which the childs body is held during the use of the instru-ment will depend upon
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