Nursemaid's elbow and common upper-limb injury — branching viva

Branching framework

Open with the one-sentence problem representation. This is a well child under five with a classic traction history and an arm held flexed and pronated, and this is a radial head subluxation until proven otherwise — a diagnosis made at the bedside, reduced at the bedside, and cured without a radiograph in the classic case. State the recognition aloud — the well child, the pulling history, the flexed and pronated posture, the absence of swelling and tenderness — before you discuss anything else. The examiner is listening for whether you reach for the reduction before you reach for the imaging. ^{[1] [2]}

Reduce by hyperpronation and name the evidence. The hyperpronation is the preferred first technique: the elbow is held, the forearm is fully pronated in one smooth, firm motion. The Macias 1998 randomised trial showed the first-attempt success of ninety-five per cent for the hyperpronation versus seventy-seven per cent for the supination-flexion, and the Aksel 2025 randomised trial of one hundred and nineteen children confirmed the lower first-attempt failure rate, a risk ratio of zero point four one favouring the hyperpronation. Be ready for the probe on the alternative: the supination-flexion, with the forearm supinated and the elbow flexed and a thumb over the radial head, is the cross-over when the hyperpronation fails. ^{[1] [6]}

Branch to the radiograph question. No radiograph is needed in the classic case — the diagnosis is clinical, and the reduction precedes the imaging. The radiograph is reserved for the atypical history, the point tenderness, the swelling, the deformity, or the failed reduction after both techniques. The Macias 2000 study showed that the non-classic history raises the relative risk of an underlying fracture, because the missed lateral condyle and the undisplaced supracondylar hide among the atypical, unreduced arms. The return of the normal arm use within fifteen to thirty minutes is the proof of success, whether or not a click was felt. ^[2]