A textbook of obstetrics . Fig. 256.—Impending ruptureof uterus in a shoulder presentation :oe, External os; oi, internal os;cr, contraction-ring (much modifiedfrom Schroeder).. Fig. 257.—Frozen section of shoulder presentation, [fthe mother had survived, spon-taneous evolution might have occurred fChiara). Spontaneous version. The transverse position is convertedinto a longitudinal position by the uterine contractions. Spontaneous evolution. The breech slips past the shoulder ABNORMALITIES IN MECHANISM. 395 and is delivered first, the rest of the body following as in a breech presentation. Th
A textbook of obstetrics . Fig. 256.—Impending ruptureof uterus in a shoulder presentation :oe, External os; oi, internal os;cr, contraction-ring (much modifiedfrom Schroeder).. Fig. 257.—Frozen section of shoulder presentation, [fthe mother had survived, spon-taneous evolution might have occurred fChiara). Spontaneous version. The transverse position is convertedinto a longitudinal position by the uterine contractions. Spontaneous evolution. The breech slips past the shoulder ABNORMALITIES IN MECHANISM. 395 and is delivered first, the rest of the body following as in a breech presentation. The body doubled up (corpore reduplicato) is expelled inone mass. This termination is possible only in premature birthswith a small child, usually macerated. Treatment.—The treatment of shoulder presentations maybe summed up in a single word—version. If the child is dead ;if the shoulder is tightly impacted and the lower uterine segmentis so distended that the slight additional strain upon its walls ofturning the child will probably determine a rupture of the uterus,the child should be decapitated. MECHANISM OF THE THIRD STAGE OF LABOR. The mechanism of the third sta
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
