A manual of obstetrics . the tip ofthe coccyx, 9^ cm. ( in.), increasing to 11 cm.( in.) in labor, the coccyx being displaced backwardi^ cm. (.5906 in.); the transverse or bisiscJiiac, extendingbetween the inner borders of the tuberosities of the ischia,11 cm. ( in.); and the oblique, measured from thejunction of the descending pubic ramus and ascendingischial ramus of one side to the center of the greater sacro- 28 A MANUAL OF OBSTETRICS. sciatic ligament of the opposite side, 12^ cm. ( in.).The axis of the outlet, if extended, would pass through thepromontory of the s
A manual of obstetrics . the tip ofthe coccyx, 9^ cm. ( in.), increasing to 11 cm.( in.) in labor, the coccyx being displaced backwardi^ cm. (.5906 in.); the transverse or bisiscJiiac, extendingbetween the inner borders of the tuberosities of the ischia,11 cm. ( in.); and the oblique, measured from thejunction of the descending pubic ramus and ascendingischial ramus of one side to the center of the greater sacro- 28 A MANUAL OF OBSTETRICS. sciatic ligament of the opposite side, 12^ cm. ( in.).The axis of the outlet, if extended, would pass through thepromontory of the sacrum above. The Pelvis in Life.—The space within the bony pelvisis considerably diminished by the disposition of the softstructures found therein. These consist of ligaments, fascia,muscles, bowel, bladder, vessels, and nerves, and upon theirpresence depend many of the phenomena of the mechanismof labor. The ligaments of the pelvis (Fig. 9) are as follows: joining the sacrum with the iliac bones, the anterior. Fig. 9.—Front view of the pelvis, with its ligaments : a, anterior sacroiliac ligament; b,iliofemoral ligament; c, obturator membrane; d, symphysis pubis; e, sacrosciatic liga-ment. and posterior sacroiliac ligajuents, two of each; 2. Thoseconnecting the sacrum and the coccyx, the anterior, pos-terior, and lateral sacrococcygeal ligaments; 3. Those join-ing the two pubic bones, the anterior, posterior, and superiorpubic and the subpubic ligaments ; 4. Those connecting thesacrum and the coccyx with the ilia and the ischia, the twogreater and two lesser sacrosciatic ligaments, the greater ex- GENERATIVE ORGANS AND PARTURIENT CANAL. 29 tending from the tubercles of the sacrum to the tuberosityof the ischium, and the ksscr from the lateral margin of thesacrum to the same point. These ligaments are importantas still further modifying the shape of the pelvis and thedirection of its axis, and, in labor, as serving as buffers forthe fetal presentation. The muscles of
Size: 1755px × 1424px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectobstetrics, bookyear1
