A treatise on the science and practice of midwifery . the contracted conjugate, while thebroader bi-parietal lies in the comparativelywide space at the side of the pelvis (Fig. 137).These mechanical considerations are suffici-ently obvious, and fully explain the successwhich has often attended the performance ofthe operation. Limits of the Operation.—It is generallyadmitted that it may be possible, for the rea-sons just mentioned, to deliver a living childby turning, through a pelvis contracted be-yond the point which would permit of a livingchild being extracted by the forceps. Manyobstetrici
A treatise on the science and practice of midwifery . the contracted conjugate, while thebroader bi-parietal lies in the comparativelywide space at the side of the pelvis (Fig. 137).These mechanical considerations are suffici-ently obvious, and fully explain the successwhich has often attended the performance ofthe operation. Limits of the Operation.—It is generallyadmitted that it may be possible, for the rea-sons just mentioned, to deliver a living childby turning, through a pelvis contracted be-yond the point which would permit of a livingchild being extracted by the forceps. Manyobstetricians believe that it is possible to de-liver a living child by turning in a pelviscontracted even to the extent of 2f inches inthe conjugate diameter. Barnes maintainsthat, although an unusually compressiblehead may be drawn through a pelvis con-tracted to 3 inches, the chance of the childbeing born alive under such circumstancesmust necessarily be small, and that from 3J inches to the normal sizemust be taken as the proper limits of the Showing the greater breadth ofthe Bi-parietal Diameter ofthe Foetal Cranium. (AfterSimpson.) Fig. 137.
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Keywords: ., bookcentury1800, bookdecade1870, bookidtre, booksubjectobstetrics
