. The science and art of midwifery . Kkj. ins. Embryotome of P. Thomas. after imparting to the instrument the proper curve, it should he passedaround the childs ueck, and, as it is withdrawn, the string should be used to drag a strong cord or the chain 6cra8eur into place. Still more ingenious is the embryotome of Pierre Thomas, consist-ing of two blades modeled after a somewhat expensive instrument de-vised by M. Tarnier. The curved blade should be passed posteriorlyopposite the sacrum. The Btraight bladeshould he introduced in frontdirectly beneath the pubic hones. When adjusted, the extremi
. The science and art of midwifery . Kkj. ins. Embryotome of P. Thomas. after imparting to the instrument the proper curve, it should he passedaround the childs ueck, and, as it is withdrawn, the string should be used to drag a strong cord or the chain 6cra8eur into place. Still more ingenious is the embryotome of Pierre Thomas, consist-ing of two blades modeled after a somewhat expensive instrument de-vised by M. Tarnier. The curved blade should be passed posteriorlyopposite the sacrum. The Btraight bladeshould he introduced in frontdirectly beneath the pubic hones. When adjusted, the extremities of CRANIOTOMY AND EMBRYOTOMY 435 the blades are in apposition. Both blades contain a grooved canal. A piece of whalebone armed with an ivory knot) is then introduced intothe canal of the Btraighl blade, while a Long, flexible piece of whale-bone provided with an ivory ring is passed into the canal of theposterior curved blade. The descent of the posterior whalebone fur-. Fig. 199.— Embryotome adjusted around the neck of the child. nishes the evidence that the canals of the two blades are in apposition,and that the Longer piece has entered the posterior canal. When thecircuit is completed, a loop of cord is passed through an eyelet in the end of the whalebone, and Berves as an attachment to a chain-saw,which, as it is drawn upward, leaves the groove and encircles the childsneck. In decapitating the child by a to-and-fro movement, the soft parts are protected by the blades of the embryotome. .}:;.; OBSTETRIC SURGERY. CHAPTEE XXIII. CESAREAN SECTION.—OPERATIONS OF THOMAS AND PORRO. Caesarean section. — History. — Indications.—Operation.—After-1 reatment.—Prog-nosis.—Operation of Porro.—Operation of Thomas. The ;ai;i:an Section. The term Cesarean section is applied to cases in which the foetusis removed from the mother by an incision made through the abdomi-nal and uterine walls. Although the operation pretends to great antiquity,
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