The practice of obstetrics, designed for the use of students and practitioners of medicine . dicated by acrayon mark. The internal or steel arm is then introduced into the vagina,with the finger as a guide, and its spatula-like tip applied firmly to the pro-montory and there maintained,while with the other hand thelead arm is given such a contourthat its terminal knob is placednear the marked spot upon themons. The external hand thengives the pelvimeter a slighttwist upon its axis, after whichthe knob of the external armmay be pressed accurately uponthe marked spot. The pelvim-eter is then loc
The practice of obstetrics, designed for the use of students and practitioners of medicine . dicated by acrayon mark. The internal or steel arm is then introduced into the vagina,with the finger as a guide, and its spatula-like tip applied firmly to the pro-montory and there maintained,while with the other hand thelead arm is given such a contourthat its terminal knob is placednear the marked spot upon themons. The external hand thengives the pelvimeter a slighttwist upon its axis, after whichthe knob of the external armmay be pressed accurately uponthe marked spot. The pelvim-eter is then locked and with-drawn. The distance is meas-ured by the scale accompanyingthe instrument. The internal arm of the pelvimeter is then applied to theinternal aspect of the symphysis, and its distance from the marked point uponthe mons veneris is determined, in the same manner as was the first measure-ment. Subtraction of the small from the large measurement gives the length Fig, 211.—Measuring the DistanceFROM THE End of the Second Fin-ger TO the Mark Made upon theRadial Bqrder of the Fig. 212.—Steins Pelvimeter for MeasuringDirectly the True Conjugate. 172 PHYSIOLOGICAL PREGNANCY. \ of the true conjugate. The Skutsch pelvimeter is in Hke manner used to measurethe transverse diameter of the pelvic inlet. (See Fig. 216.) True Conjugate with the Farabeuf Pelvimeter.—This resource was intro-duced into pelvimetry by Farabeuf * for the purpose of lengthening the index-finger, in case the accoucheur should be unable to reach the promontory, eitherby reason of the shortness of his finger, or because of unusual dimensions ofthe pelvis. While fingers of average length are sufficient for pelvimetry incontracted pelves, this is by no means necessarily the case in general pelvim-etry, and therefore the device of Farabeuf is excellent in routine obstetricalpractice. The custom of reinforcing the finger with a vesical sound is opento criticism, from the fact that it may be given a wr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
