1mL of hyaluronic acid (20 mg/2 mL; Hyalgan, Fidia, Abano Terme, Italy) infiltration at A1-Pulley under ultrasound guidance after subcutaneous 2% lidocaine without epinephrine infiltration of the skin overlying the A1-pulley.

1 mL of Triamcinolone acetonide 10mg/ml infiltration at A1-Pulley under ultrasound guidance after subcutaneous 2% lidocaine without epinephrine infiltration of the skin overlying the A1 pulley.

A1-Pulley infiltration for trigger finger

Change in Quinnell grading overtime within 3 months after injection. Trigger fingers are rated as follows: Grade 0: normal finger movements, Grade 1: uneven finger movements, Grade 2: actively correctable triggering, Grade 3: passively correctable triggering, and Grade 4: locked digit.

Change in pain Visual analogue scale will be recorded. The patient marks on the 100 mm in length line the point that he/she feels to represent his/her perception of pain at the current state. The VAS score is determined by measuring in millimetres from the left hand end of the line to the point that the patient marks ( a higher score indicates greater pain intensity). Categorization of none, mild, moderate and severe pain will be also used (none = 0, mild = 1-4, moderate = 5-6, and severe = 7-10).