. The science and art of midwifery. s the only hope of preserving the childslife. V. Spondylolisthetic Pelvis. This rare form of contracted pelvis was first described by Rokitan-sky in 1839. Its principal pathological feature consists in the sepa-ration of the last lumbar from the first sacral vertebra andin thedescentof the body into the pelvis, where the inferior, or in an extreme casethe posterior, surface of the body ofthe last lumbar rests upon the ante-rior surface of the first sacral verte-bra. The anterior surface of the lastlumbar vertebra is directed anterior surfaces of
. The science and art of midwifery. s the only hope of preserving the childslife. V. Spondylolisthetic Pelvis. This rare form of contracted pelvis was first described by Rokitan-sky in 1839. Its principal pathological feature consists in the sepa-ration of the last lumbar from the first sacral vertebra andin thedescentof the body into the pelvis, where the inferior, or in an extreme casethe posterior, surface of the body ofthe last lumbar rests upon the ante-rior surface of the first sacral verte-bra. The anterior surface of the lastlumbar vertebra is directed anterior surfaces of the fourth,third, and second lumbar vertebra?form an arch, the most prominentpart of which, being nearest the sym-physis, replaces the normal promon-tory. The result of this displace-ment is a considerable diminution inthe aiitero-posterior diameter of thepelvic inlet. The descent of the lum-bar portion of the spine, which is gradually accomplished, is attendedby atrophy of the intervertebral cartilages, and frequently by osse- in. Fig. 230.—Spondylolisthetic pelvis.(Kilian.) * Litzmann, op. p. 65. RARE FORMS OF PELVIC DISTORTION7. 521 ous union between the bodies of the lumbar and sacral weight of the superimposed trunk being now transmitted tothe anterior surface of the sacrum, instead of to its base, the pel-vic center of gravity is displaced forward. This is compensatedfor by a diminution in the normal pelvic inclination, the anteriorportion of the pelvis being tilted slightly upward. The pressureupon the anterior surface of the sacrum forces its base posterior superior iliac spines are thus widely separated, and theapex of the sacrum is thrown forward, encroaching upon the antero-posterior diameter of the outlet. In a case cited by Breslau,* thesacro-iliac synchondrosis possessed great mobility. The traction upon the ilio-femoral ligaments, which approximatesthe tubera ischii, and the lateral displacement of the ilia, due to re-cession o
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Keywords: ., bookcentury1800, bookdecade1890, bookidsci, booksubjectobstetrics
