A text-book of practical obstetrics, comprising pregnancy, labor, and the puerpal state, and obstetric surgery . Fig. 70.—Lusks Cephalotribe. occupies more space in the pelvis, since neither of the blades isapplied within the cranial cavity. For this reason, therefore,the cranioclast is to be preferred whenever the emergencies ofthe given case will allow of its application. Simpson, Hicks, Breisky, Lusk, and others have deviseduseful forms of the instrument. Lusks cephalotribe, in most. Fig. 71.—Tarniers Basiotribe. respects, will answer best where the instrument is indicatedat all. Obviously,
A text-book of practical obstetrics, comprising pregnancy, labor, and the puerpal state, and obstetric surgery . Fig. 70.—Lusks Cephalotribe. occupies more space in the pelvis, since neither of the blades isapplied within the cranial cavity. For this reason, therefore,the cranioclast is to be preferred whenever the emergencies ofthe given case will allow of its application. Simpson, Hicks, Breisky, Lusk, and others have deviseduseful forms of the instrument. Lusks cephalotribe, in most. Fig. 71.—Tarniers Basiotribe. respects, will answer best where the instrument is indicatedat all. Obviously, since the cephalotribe is applied entirelybetween the walls of the pelvis and the fcetal head, and since,further, the instrument, whilst diminishing the diameter of thehead in one direction, increases it in another, is applicable only EMBRYOTOMY. 155 when the operation is indicated in the presence of the minorgrades of pelvic contraction. Exceptionally, even this instrument is not powerful enoughto break up the base of the cranium to permit of delivery with-out subjecting the maternal parts to unnecessary damage. Thenwe must have recourse to the rather complicated, but mostpowerful, instrument devised by Tarnier,—the basiotribe. Thisinstrument is a perforator and a cephalotribe in one. Thescrew-tip perforates the cranium and holds it firmly whilst theaction of the blades is crushing the base of the skull. Notwithstanding its advantages in certain cases, the cepha-lotribe is
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Keywords: ., bookcentury1800, bookdecade1890, bookpubli, booksubjectobstetrics
