A manual of obstetrics . true conjugate diameter of the pelvis. Hardies measure-ment is also made externally, but is not practical on accountof its inaccuracy and the limited period of gestation (the first GENERATIVE ORGANS AND PARTURIENT CANAL. 33 trimester only) during which it can be employed; it can onlybe taken in women who are not obese. The patient restingin the lithotomy position, the fingers are placed about 2]/^cm. (.98425 in.) below the umbilicus, and pressure backwardis made until the sacral promontory may be felt; the dis-tance from the promontory to the top of the symphysis ismea
A manual of obstetrics . true conjugate diameter of the pelvis. Hardies measure-ment is also made externally, but is not practical on accountof its inaccuracy and the limited period of gestation (the first GENERATIVE ORGANS AND PARTURIENT CANAL. 33 trimester only) during which it can be employed; it can onlybe taken in women who are not obese. The patient restingin the lithotomy position, the fingers are placed about 2]/^cm. (.98425 in.) below the umbilicus, and pressure backwardis made until the sacral promontory may be felt; the dis-tance from the promontory to the top of the symphysis ismeasured, and an approximate idea of the size of the pelvicinlet is obtained. The internal vieasiircincnts are the sacrocotyloid diameter,extending from a point immediately above the center of theacetabulum to the promontory of the sacrum (9^ cm. in.), and the internal ox indirect conjugate latter measurement is taken by the hand in the vagina(Fig. 13), the tip of the middle finger resting against the. PromontonjFig. 13.—Manual method of measuring the diagonal conjugate. promontory of the sacrum ; the distance between the tip ofthis finger and the point on the radial border of the hand in3 34 A MANUAL OF OBSTETRICS. contact with the under surface of the symphysis, the sub-pubic Hgament, is the conjugate diagonal (i2%! cm. in.); it is i^ cm. ( in.) greater than thetrue conjugate. To avoid the errors in this measurementconsequent upon the variations in the length of the sym-physis and the size of the conjugatosymphyseal angle (thatbetween the top of the symphysis and the true conjugate ofthe superior strait), a better and more direct method is thatrecently suggested by Professor Barton Cooke Hirst of theUniversity of Pennsylvania. This consists in measuring fromthe promontory of the sacrum to the upper outer edge of thesymphysis pubis (Fig. 14); the thickness of the symphysis
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectobstetrics, bookyear1
