The practice of obstetrics, designed for the use of students and practitioners of medicine . gles. Some authorities* The Rontgen Rays in Medicine and Surgery, 1901, p. 378. THE EXAMINATION OF PREGNANCY. 179 have seen in cliseometry a valuable prospective resource in the differential diag-nosis of pelvic deformities, while others believe that the subject of forceps-tractionshould benefit most from increased study of the inclination. Cliseometers havebeen devised by Naegele, Rit-gen, Prochownik, and others, but no one apparatushas ever attained any considerable degree of recognition. Sources of
The practice of obstetrics, designed for the use of students and practitioners of medicine . gles. Some authorities* The Rontgen Rays in Medicine and Surgery, 1901, p. 378. THE EXAMINATION OF PREGNANCY. 179 have seen in cliseometry a valuable prospective resource in the differential diag-nosis of pelvic deformities, while others believe that the subject of forceps-tractionshould benefit most from increased study of the inclination. Cliseometers havebeen devised by Naegele, Rit-gen, Prochownik, and others, but no one apparatushas ever attained any considerable degree of recognition. Sources of error, cum-brousness, and general impracticability have thus far attended all attempts tosystematize and popularize cliseometry. Neumann and Ehrenfest * have intro-duced a device for measuring the pelvic inclination, which they term a cliseometer(Fig. 222). It consists of a rigid curve (A), which carries at one end a hollowcylinder rod (B), so disposed that it lies directly in the axis of the free extremity ofthe curve, which is armed with a knob (C); the hollow cylinder contains a solid. Fig. 222.—Method of Measuring the Degree of Pelvic Inclination.(Instrument of Neumann and Ehrenfest.) Cliseometry. rod (D), which sUdes up and down, and is armed with a second knob (F). Thetwo knobs are naturally in the same axis. The upper extremity of the movingrod contains a disc (G), which rotates in the direction of the length of the periphery of the disc is divided into degrees. Above and below are zeromarks, and the numbering is so arranged that there are four quadrants^ of 90degrees each. The disc is also provided with a water-level and an index. Whenthe cliseometer is so placed that the axis in which the knobs lie is horizontal,the index points to o. If the knobs are apphed to the points used in measuringthe external conjugate with a pelvimeter, and the disc is then rotated untilthe water-level is horizontal, the zero points are also horizontal. The angle * Monatsschrift f.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
