Activity-based hand-function profile in preschool children with obstetric brachial plexus palsy.

Obstetric brachial plexus palsy (OBPP) leads to various hand-function disorders. The present study aimed to determine activity-based hand function profiles in preschool children with different OBPP functional levels. 112 children aged 44-77 months were included, and grouped on the Narakas classification: group 1, Narakas type 1; group 2, type 2: and group 3, types 3 + 4. Hand function was evaluated on the Raimondi scale, stereognosis, and the elbow/forearm and wrist/finger/thumb sections of Brachial Plexus Outcome Measure (BPOM). Groups 1 and 2 successfully and comparably completed the BPOM hand activities (p > 0.05), while Group 1 had better results than Group 2 for BPOM elbow/forearm activities (p < 0.001): Group 2 had difficulty in activities involving elbow flexion, supination and pronation, whereas Group 1 had difficulty only in activities involving supination. Comparatively, Group 3 had lower scores for Raimondi scale (p < 0.001), BPOM-hand (p < 0.001), BPOM-elbow/forearm (p < 0.001) and stereognosis (p < 0.001). According to the literature, hand functions are conserved in upper-root brachial plexus injury and there is no need to evaluate them, but our results showed activity restrictions related to hand functions involving forearm rotation. In children with total plexus injury, grasp was absent and thumb function was deficient. The present showed that these restrictions can be identified by population-specific activity-based assessment.