. Obstetrics for nurses. ted withrickets, so that both simple flat and flatrachitic pelves are seen. In general, flatpelves have approximately normal transversediameters, but are shortened in the antero-posterior diameter, the diagnoal conjugatemeasuring centimeters or less. Simpleflat pelves occur most frequently in white^\•omen, in whom they represent about one-sixth of all pelvic contractions, and fre-quently give rise to serious pelvic flat rachitic type is, as the name implies,associated with general rickets, and, conse-quently, is more commonly observed amongcolored wom
. Obstetrics for nurses. ted withrickets, so that both simple flat and flatrachitic pelves are seen. In general, flatpelves have approximately normal transversediameters, but are shortened in the antero-posterior diameter, the diagnoal conjugatemeasuring centimeters or less. Simpleflat pelves occur most frequently in white^\•omen, in whom they represent about one-sixth of all pelvic contractions, and fre-quently give rise to serious pelvic flat rachitic type is, as the name implies,associated with general rickets, and, conse-quently, is more commonly observed amongcolored pelves usually occur in women whose pelvic measure-ments are otherwise normal, but they may occur in association with anyother type of contraction. In funnel pelves, the pubic arch has lost itsnormal feminine width and approaches the male type, with closely ap-proximated ischial bones, so that lliey are sometimes designated as mas-culine pelves. They represent the type most frequently observed in white. Fig. 120.—Rachitic dwarfshowing pronounced de-formity. 288 TEXTBOOK OF OBSTETRICS FOR NURSES women, but only rarely is the contraction sufficiently pronounced to giverise to serious dystocia. To summarize briefly, the following chart gives at a glance the essen-tial features of the varieties of contracted pelves most frequently en-countered. Chart Showing Measurements in Different Types of Contracted Pelves Inter- Inter- Bi- troch-anteric Ext. Diag. Tubera spinous cristal Conj. Conj. Ischii cm. cm. cm. cm. cm. cm. Normal 26 28 31 21 Generally contracted—typical less less less 18 less than than than or or than 26 28 31 less less Generally contracted—rachitic. .. less less less 18 less than than than or or than 26 28 31 less less Sinple flat 26 28 31 18 or or less less Flat rachitic 26 28 31 18or less less Funnel-shaped 26 28 31 21 or less Other types of contracted pelves occasionally
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectobstetrics, bookyear1
