![]() ![]() ![]() An X-ray is less useful in younger infants as the hips still contain a large proportion of cartilage, which is not so well seen on X-ray. Those with risk factors such as being born breech often have enhanced screening, such as an ultrasound.Īn X-ray may be used in older children or adults to demonstrate the underdeveloped socket of the hip. Not all cases of laxity mean that the child has dysplasia, and not every case of dysplasia will be detected by this clinical examination as the condition develops with time. from Other signs may include an asymmetry of the buttock creases or leg lengths (due to one hip not being fully located in the joint). This may be felt as a looseness of the joint, or hips which do not stay in the joint (dislocate) when moved.Īn illustration of a dislocated hip. At these examinations, clinicians feel for laxity of the hip joints. Ongoing examinations take place over the first 12 months. Because of the risks of disability if not detected, all babies undergo screening, usually physical examination by a trained midwife or doctor at birth and again at the routine six-week check. There are usually no symptoms of hip dysplasia at birth, as babies are not able to walk or crawl. Girls may be more sensitive to these hormones than boys. This is probably related to hormones the mother produces, which cause ligaments to be more relaxed around the time of birth. Females are four times more likely to be affected than males. Large babies, reduced amniotic fluid or a first pregnancy (with a less “stretchy” uterus) reduce the space a baby has to move around when still in the uterus.īeing breech (bottom instead of head first) at delivery and tight swaddling during early childhood also increase the risk of hip dysplasia.īabies who have someone in their immediate family with hip dysplasia are more likely to be affected. CausesĪnything that reduces or prevents movement of the hip joint increases the risk of hip dysplasia. This can cause serious problems for the blood supply to the hip, and also affect walking. This means that the hip is more prone to dislocation, where the ball slides out of the socket. ![]() In hip dysplasia, the socket component (acetabulum) is underdeveloped, so the ball component is not well fixed in the socket. Various factors may affect the development of the joint, along with the ligaments which support the joint and hold the two bony components together. The development of the joint is dependent on the ball component remaining within the socket. In normal hip development, the ball component grows faster than the socket. ![]()
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