In a newborn (≤6 months), what do positive Ortolani and Barlow maneuvers indicate?

Positive Ortolani and Barlow Maneuvers in Newborns

A positive Ortolani test indicates a hip that is already dislocated but can be reduced back into the acetabulum with a palpable "clunk," while a positive Barlow test indicates a hip that is unstable and can be dislocated out of the acetabulum but spontaneously reduces. Both tests detect hip instability from ligamentous or capsular laxity, which is the hallmark of developmental dysplasia of the hip (DDH) 1.

Understanding the Distinction

Ortolani Test

• What it detects: A hip that is already dislocated
• Technique: Abduct and gently lift the flexed thigh while pushing the greater trochanter anteriorly
• Positive finding: A palpable or audible "clunk" as the dislocated femoral head relocates into the acetabulum
• Clinical significance: This is a more severe finding indicating frank dislocation that is still reducible 1
• Predictive value: The Ortolani test has a high positive predictive value of 39-61% for confirmed DDH on ultrasound 2

Barlow Test

• What it detects: A hip that is reduced but unstable
• Technique: Gently adduct the thigh with thumb over femoral neck to dislocate the femoral head posteriorly, then lift and abduct to relocate it
• Positive finding: The hip can be dislocated out of the acetabulum and then reduced back in
• Clinical significance: Identifies unstable hips that the Ortolani test may miss 1
• Predictive value: The Barlow test has a lower positive predictive value of only 4-16%, meaning most Barlow-positive hips resolve spontaneously 2

Critical Clinical Context

Both tests fundamentally assess the same pathology—instability between the femoral head and acetabulum—but from opposite directions. The Ortolani test reduces an existing dislocation, while the Barlow test provokes dislocation of an unstable hip 1, 3.

Important Caveats

• Age limitation: These maneuvers become less reliable after 3 months of age as capsular laxity decreases and muscle tightness increases. After 8-12 weeks, the tests may be negative even with hip pathology present 3

• False positives are common: 41-58% of abnormal physical examinations are false-positive when correlated with ultrasound, leading to potential overtreatment 3

• Not all DDH is detectable: These tests only identify hip instability present at birth. DDH can develop later even after normal newborn examination, particularly in breech-positioned infants 4

• Distinguish from benign clicks: A stable "clicking" hip with no laxity is not a positive test and does not indicate DDH 1

Recommended Management Algorithm

For positive Ortolani or Barlow test 3, 5:

1. Do not initiate treatment immediately based on clinical examination alone
2. Obtain hip ultrasound to confirm findings (ideally at 2-6 weeks of age, not before 2 weeks)
3. If ultrasound confirms instability: Initiate Pavlik harness treatment
4. If ultrasound is normal: The clinical finding was likely a false positive; observe without treatment

This approach reduces unnecessary treatment by 41-58% while not increasing rates of abnormal hip development or surgical intervention 3.

Natural History Consideration

60-80% of abnormalities identified on physical examination and >90% identified on ultrasound resolve spontaneously 1. This high spontaneous resolution rate, particularly for Barlow-positive hips, underscores why confirmatory imaging before treatment initiation is essential to avoid overtreatment and potential iatrogenic complications like avascular necrosis.