A 9-month-old infant is being evaluated for developmental dysplasia of the hip (DDH). The nurse is preparing to assist with the Ortolani test. Which safety consideration is most critical during this assessment?

Gentle, controlled movements during the Ortolani test prevent iatrogenic hip dislocation in infants with vulnerable hip joints. Firm pressure or rapid maneuvers can cause harm without providing accurate assessment.

Understanding the Ortolani Test
The Ortolani test is a clinical assessment maneuver used to detect developmental dysplasia of the hip (DDH) in infants. In a dislocated but reducible hip, the femoral head rests posterior to the acetabulum. The test involves flexing the infant's hips and knees, then gently abducting the hips while the examiner's fingers apply a gentle upward force over the greater trochanter. A positive sign is a palpable "clunk" as the femoral head slides back into the acetabulum. This is not a passive range-of-motion exercise but a specific reduction maneuver that requires precise, controlled handling.

Analysis of the Critical Safety Consideration
The most critical safety consideration during the Ortolani test is the use of gentle, controlled movements to avoid causing an iatrogenic injury. The underlying principle is that the anatomical structures of an infant's hip are cartilaginous and vulnerable. Forceful or abrupt manipulation can damage the acetabular labrum, disrupt the blood supply to the femoral head, or, most critically, transform a reducible, stable dislocation into an irreducible one.

This concept is directly supported by the analysis of treatment injuries in DDH. A 34-year review of compensation claims found that adverse events, including those classified as avoidable treatment injuries, were often linked to the technical execution of care ^[1]. While the study broadly examines management, the mechanism of injury from excessive force during reduction maneuvers is a recognized underlying cause of these preventable events. The risk is not merely discomfort, but the creation of a true pathology where the hip becomes permanently dislocated and resistant to future closed reduction attempts.

Why Other Options Are Incorrect
- Option 1 is incorrect because the Ortolani test is performed with the hips and knees flexed, not with legs extended. Extending the legs tightens the hip capsule and adductors, making it impossible to reduce a dislocated hip.
- Option 2 is incorrect because firm pressure to stabilize the pelvis is counterproductive and dangerous. The maneuver requires the pelvis to be free so the examiner can feel the femoral head move relative to the acetabulum. Forcing the pelvis down can mask the "clunk" and increases the risk of a femoral shaft fracture or physeal injury.
- Option 3 is incorrect because speed is not a safety priority. A rapid, jerky movement is exactly what causes iatrogenic harm. The test must be performed slowly and deliberately to feel the subtle reduction and to prevent injury. The goal is precision, not speed.

Clinical Link to Secondary Displacement
The critical nature of gentle handling is further emphasized by the phenomenon of secondary (late) DDH. A hip that initially appears stable or only mildly dysplastic on ultrasound can later dislocate . This demonstrates the dynamic and evolving nature of the infant hip joint. If a clinician applies excessive force during a screening test like the Ortolani maneuver, they can disrupt a tenuous but stable relationship between the femoral head and the acetabulum, directly contributing to a secondary displacement. The maneuver itself can become the insult that destabilizes the joint, underscoring why controlled, gentle technique is the paramount safety consideration to prevent an avoidable, iatrogenic hip dislocation ^[1].