It is performed by an examiner first flexing the hips and knees of a supine infant to 90 degrees, then with the examiner's index fingers placing anterior pressure on the greater trochanters, gently and smoothly abducting the infant's legs using the examiner's thumbs. A positive sign is a distinctive 'clunk' which can be heard and felt as the femoral head relocates anteriorly into the acetabulum:
This is part of the standard infant exam performed preferably in early infancy.
- "Screening for developmental dysplasia of the hip: recommendation statement". Pediatrics. 117 (3): 898–902. March 2006. PMID 16510673. doi:10.1542/peds.2005-1995.
- Storer SK, Skaggs DL (October 2006). "Developmental dysplasia of the hip". American Family Physician. 74 (8): 1310–6. PMID 17087424.
- Dwyer NS (June 1987). "Congenital dislocation of the hip: to screen or not to screen". Archives of Disease in Childhood. 62 (6): 635–7. PMC . PMID 3619484. doi:10.1136/adc.62.6.635.
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