A textbook of obstetrics . Fig. JX). Martins pelvimeter. Fig. 207. — Harris Dickinson portable pelvimeter. ANOMALIES IX THE FORCES OF LABOR. 4II the foundations of pelvimetry, and his instrument and methodsare in use at the present time (Figs. 265—268). It is con-venient to describe the measurements of the diameters of thepelvic inlet, pelvic cavity, and pelvic outlet separately. Measurement of the Anteroposterior Diameter of the SuperiorStrait.—This measurement, the most important in the pelvis,can not be taken directly. It must be estimated by several. Fig. 268.—Measuring the external conjug
A textbook of obstetrics . Fig. JX). Martins pelvimeter. Fig. 207. — Harris Dickinson portable pelvimeter. ANOMALIES IX THE FORCES OF LABOR. 4II the foundations of pelvimetry, and his instrument and methodsare in use at the present time (Figs. 265—268). It is con-venient to describe the measurements of the diameters of thepelvic inlet, pelvic cavity, and pelvic outlet separately. Measurement of the Anteroposterior Diameter of the SuperiorStrait.—This measurement, the most important in the pelvis,can not be taken directly. It must be estimated by several. Fig. 268.—Measuring the external conjugate diameter upon the living female (Dickinson). plans. Baudelocque was the first to point out the relation be-tween the measurement from the depression under the lastspinous process of the lumbar vertebra: to the upper edge of thesymphysis pubis, and the true conjugate diameter nt the pelvicinlet. To this external measurement the name external conju-gate was given, but it is often called the diameter of Baude-locque (Fig. 268). Its discoverer believed the relation 41 2 THE PA THOLOG ) OF LABOR. between the external and internal diameters to be constant,—that the one exceeded the other by 8 to 8^ centimeters,—butin this he was mistaken. The line ni the external diameterdoes not usually coincide with the line of the internal, and thethickness of bones and superimposed structures differs, of course,in each individual. In thirty cases in which Litzmann had anopportunity to compare the measurement of the external conju-gate taken during life wi
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
