Ultrasound imaging and guidance for repeat injections of flexor pollicis longus triggering

Data sharing is not applicable to this article as no new datasets were generated or analyzed during the current study. Video S1. Dynamic ultrasound imaging (longitudinal view) of the right thumb shows twisting and mild deformation of the FPL under the swollen A1 pulley (white arrowhead). FPL, flexor pollicis longus tendon; MH, metacarpal head; PP, proximal phalanx. Video S2. Dynamic ultrasound imaging (longitudinal view) of the left thumb shows twisting and deformation of the FPL below the thickened A1 pulley (white arrowhead). FPL, flexor pollicis longus tendon; PP, proximal phalanx; S, sesamoid bone. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.