As part of a routine infant assessment, the advanced practice registered nurse (APRN) regularly assesses bilateral hips for signs of dislocation until the child is walking. What special physical exam maneuvers are used to detect hip instability in the newborn? Select All That Apply.

Assessment of hip stability in newborns is an essential component of early musculoskeletal screening to detect developmental dysplasia of the hip (DDH). Early identification is critical because untreated hip instability can lead to gait abnormalities, joint deformity, and long-term disability. Specific orthopedic maneuvers are used during infancy to assess whether the femoral head is dislocatable or reducible within the acetabulum. These tests are routinely performed until the infant begins walking, after which other signs become more apparent. Rationale: A. The Barlow test is used to assess whether the infant’s hip is dislocatable. It involves gently adducting the hip and applying posterior pressure to determine if the femoral head can be pushed out of the acetabulum. A positive Barlow test indicates hip instability and suggests developmental dysplasia of the hip requiring further evaluation and monitoring. B. The Trendelenburg test assesses hip abductor muscle strength in older children and adults, not newborns. It evaluates pelvic stability during single-leg stance and is used in conditions such as hip dysplasia, muscular weakness, or nerve injury. It is not appropriate for detecting neonatal hip instability. C. The Ortolani test is used to assess whether a dislocated hip can be reduced back into the acetabulum. It involves abducting the infant’s hips while applying gentle anterior pressure to feel or hear a “clunk” as the femoral head relocates. A positive Ortolani sign indicates a reducible dislocation consistent with developmental dysplasia of the hip. D. The Leopold maneuver is an obstetric assessment technique used during pregnancy to determine fetal position, presentation, and lie within the uterus. It is not related to neonatal orthopedic examination or detection of hip instability. Therefore, it is not used in assessing developmental dysplasia of the hip.