Swaddling Infants Too Tightly May Cause Hip Problems

FRIDAY, May 4 (HealthDay News) — When swaddling an infant, make
sure to leave the blankets loose enough to allow leg and hip movement,
experts say.

They warn that wrapping infants too tightly may cause their hip joints
to develop abnormally, causing the ball of the thighbone to dislocate from
the socket. The condition, called developmental dysplasia of the hip, can
lead to limping, differences in limb length, pain and arthritis, according
to the Pediatric Orthopaedic Society of North America.

“Many cultures, and a growing number of Americans, practice traditional
swaddling — the tight wrapping of infants with their legs together and
fully extended,” said orthopedic surgeon Dr. Peter Waters, president of
the society, in a news release.

“Unfortunately, this practice places infants at a high risk for
dysplasia,” he said. “Instead, the infant’s arms and torso should be
snugly wrapped, while the legs are wrapped loosely, ensuring the legs are
bent up and out. The legs should be free to move, and, most importantly,
the legs should never be wrapped in a straight-down position.”

The society joined the American Academy of Pediatrics and the
International Hip Dysplasia Institute in recommending an updated method of
swaddling that allows more wiggle room for infants.

Animal studies have found that forcing the hip and knee to extend right
after birth increases tension in the hamstring and hip muscles, increasing
the risk of loose ligaments, instability and dislocation of the thigh bone
from the hip socket.

More information

The International Hip Dysplasia Institute provides more information on
infant hip dysplasia.

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