The practice of obstetrics, designed for the use of students and practitioners of medicine . uboccipito-frontal circumference of the MATERNAL DYSTOCIA IN THE PARTURIENT TRACT. 599 head is always a menace to the integrity of the perineum in cranial and breechpositions, as is the occipito-mental in face presentation. The perineum is alsomenaced by the abrupt expulsion of the posterior shoulder in head presen-tations. The mechanism of traumatisms of the pelvic floor, I believe, is asfollows: (i) When the remains of the hymen give way to the presenting partthe laceration may extend to the fourchet
The practice of obstetrics, designed for the use of students and practitioners of medicine . uboccipito-frontal circumference of the MATERNAL DYSTOCIA IN THE PARTURIENT TRACT. 599 head is always a menace to the integrity of the perineum in cranial and breechpositions, as is the occipito-mental in face presentation. The perineum is alsomenaced by the abrupt expulsion of the posterior shoulder in head presen-tations. The mechanism of traumatisms of the pelvic floor, I believe, is asfollows: (i) When the remains of the hymen give way to the presenting partthe laceration may extend to the fourchette, or, in a multipara, may begin inthe latter. According to the circumstances in each case, the injury may stopat the fourchette or extend to a variable degree into the pelvic floor. (2)The rupture of the floor is simply a continuation of the vaginal laceration. (3)The mucous membrane is the first to yield, the tear extending into the sub-jacent tissue. Intraperineal or central rupture occurs, according to Budin,in primiparae the residue of whose hymens is extraordinarily unyielding. In.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
