Stiegler Helmar, Hafner Erich, Schuchter Katharina, Engel Alfred, Graf Reinhard
Departments of Orthopaedic Surgery, Danube Hospital, Vienna, Austria.
J Pediatr Orthop B. 2003 Nov;12(6):365-8. doi: 10.1097/01.bpb.0000084466.28647.0e.
A sonographic study of perinatal hip development was performed by consecutive measurement of Graf's alpha and beta angles in fetal and newborn hips. The study group consisted of infants with sonographically normal hip findings at birth. Forty fetuses were examined by fetal hip sonography at 34, 36 and 38 weeks of gestation. Postnatally, hip sonography was performed in the first and sixth week of age. Maturation curves of the bony (alpha-angle) and cartilaginous (beta-angle) acetabular roof from 34 weeks of gestation to 6 weeks of age were established. Prenatally, the mean alpha-angles were above the level that corresponds to a mature hip joint. A significantly higher value of the mean alpha-angles was found after birth. The mean beta-angles of the fetuses did not differ from those of the newborns. Our results revealed that the fetal hip joint is sonographically mature at 34 weeks of gestation. Further progression of hip development occurs around term.
通过连续测量胎儿和新生儿髋关节的格拉夫α角和β角，对围产期髋关节发育进行了超声检查。研究组由出生时超声检查髋关节结果正常的婴儿组成。在妊娠34、36和38周时，对40例胎儿进行了胎儿髋关节超声检查。出生后，在出生后第一周和第六周进行髋关节超声检查。建立了从妊娠34周龄到6周龄的骨性（α角）和软骨性（β角）髋臼顶的成熟曲线。产前，平均α角高于对应成熟髋关节的水平。出生后发现平均α角的值明显更高。胎儿的平均β角与新生儿的平均β角没有差异。我们的结果表明，妊娠34周时胎儿髋关节在超声检查中已成熟。髋关节发育的进一步进展发生在足月左右。
