Licence: Public Domain Mark
Credit: A manual of obstetrics / by W. A. Newman Dorland. Source: Wellcome Collection.
Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.
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![trimester only) during which it can be employed; it can only be taken in women who are not obese. The patient resting in the lithotomy position, the fingers are placed about 2]/^ cm. (.98425 in.) below the umbilicus, and pressure backward is made until the sacral promontory may be felt; the dis- tance from the promontory to the top of the symphysis is measured, and an approximate idea of the size of the pelvic inlet is obtained. The internal vieasiircincnts are the sacrocotyloid diameter, extending from a point immediately above the center of the acetabulum to the promontory of the sacrum (9^ cm. or 3.6417 in.), and the internal ox indirect conjugate diagonal. The latter measurement is taken by the hand in the vagina (Fig. 13), the tip of the middle finger resting against the Promontonj Fig. 13.—Manual method of measuring the diagonal conjugate. promontory of the sacrum ; the distance between the tip of this finger and the point on the radial border of the hand in 3](https://iiif.wellcomecollection.org/image/b21224079_0037.jp2/full/800%2C/0/default.jpg)