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Fig. 1 | BMC Surgery

Fig. 1

From: Ultrasound-guided needle release of A1 pulley combined with corticosteroid injection is more effective than ultrasound-guided needle release alone in the treatment of trigger finger

Fig. 1

A A1 pulley thickening and the measurement method of thickness of A1 pulley (arrowhead). B Ultrasonography-guided needle release of A1 pulley. Thick arrow: needle head; Thin arrow: thickened A1 pulley. C Ultrasonography-guided corticosteroid injection in A1 pulley. Arrow: needle head; Triangle arrow: drug diffused in the tendon sheath. P: proximal end; D: distal end

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