Which observation indicates successful reduction of a nursemaid's elbow?

The observation that indicates successful reduction of a nursemaid's elbow is the child's ability to move the affected arm at the elbow. Nursemaid's elbow, or radial head subluxation, often occurs when a child's arm is pulled or yanked, leading to a dislocation of the radius from its normal position. When a healthcare provider successfully reduces a nursemaid’s elbow, the immediate ability of the child to freely move the elbow signifies that normal joint mechanics have been restored.

Movement is a clear indicator that the joint is functioning properly again, as children typically will not use an arm that is still dislocated due to pain or discomfort. Thus, the presence of active movement in the affected arm serves as the most direct evidence that the reduction was successful.

While hearing a click, the resolution of any deformity, and obtaining radiographic confirmation can also be part of the overall assessment, they are less definitive indicators of successful reduction compared to immediate improvement in range of motion. In clinical practice, the ability to move the joint is often prioritized to confirm that the treatment has been effective.