The peak incidence of radial head subluxation (nursemaids’ elbow) occurs
in children 2 to 3 years of age, with a range from 6 months to 7
years. Girls are seen with the injury more commonly than boys. Left-sided
injury is more common, presumably because most caretakers are right-handed.
The usual mechanism of injury is sudden longitudinal traction on
the arm with the elbow extended, such as occurs when a child is pulled
up by the arm, although up to half of injuries are associated with other