The principles and practice of obstetrics . rtions of bone beingseized can be fractured and twisted off in succession,care being taken not to wound the tissues by the ser-rated edges of the fragments during their extraction. By these measures the whole vault of the craniummay be removed so as to reduce the head to compara-tively a very small size, including simply the base ofthe cranium and the face; the measurements of whichwould be the bi-temporal diameter, two and a halfinches, and the naso-mental diameter, one and a halfinches, or, if the lower jaw be broken or removed,this perpendicular d
The principles and practice of obstetrics . rtions of bone beingseized can be fractured and twisted off in succession,care being taken not to wound the tissues by the ser-rated edges of the fragments during their extraction. By these measures the whole vault of the craniummay be removed so as to reduce the head to compara-tively a very small size, including simply the base ofthe cranium and the face; the measurements of whichwould be the bi-temporal diameter, two and a halfinches, and the naso-mental diameter, one and a halfinches, or, if the lower jaw be broken or removed,this perpendicular diameter of the face will measurebut one inch. The head thus reduced could be drawnthrough comparatively a small opening, especially ifthe face be made to present; the remains of theocciput would then be applied to the posterior part ofthe neck. Other measures have been proposed to diminish thesize of the head in these unfortunate cases of extreme EM BRYOTOMY. ty. Dr. Davis, of London, has proposed annippers, the short blades being Fig. Davis Osteotouiist. arranged in the form of a punch, of an ellipticalshape. One blade is to be introduced within the cra-nium, and the other blade exterior, but underneath thescalp. A portion of the bone one inch by half an inchin extent can thus be removed, and so on, in succes-sion, until the head be sufficiently diminished in , however, do not appear to have sanc-tioned the osteotomist, as it is now seldom, if ever,employed. Cranioelast.—Professor Simpson, of Edinburgh, hasemployed an instrument, somewhat analogous to the Fig. 59.
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Keywords: ., boo, bookcentury1800, booksubjectobstetrics, booksubjectpregnancy
