<qa>  What was the time elapsed from the injection of the study drug?After the injection, the sensorial block was assessed every 30 s until the initiation of surgery by pinprick test using 22 gauge needle on the radial, ulnar and median nerve stimulation areas of the hand and of the anterior surface of the arm. Motor function was checked by asking the patient to bring the wrist and finger to extension and flexion and the time of complete motor block was recorded when spontaneous movement was impossible. The time elapsed from the injection of the study drug until the sensorial block was provided in all stimulation areas was recorded as the onset time of sensorial block. Likewise, the time elapsed from the injection of the study drug until achieving the complete motor block was recorded as the onset time of motor block. After achieving complete motor block and sensorial block, the distal tourniquet was inflated to 250 mmHg, the proximal tourniquet was deflated, and the surgical procedure was initiated. Mean arterial pressure MAP, oxygen saturation SpO2, and heart rate HR were monitored during the surgery, before and after tourniquet application, and until disappearance of anesthesia after deflating the tourniquet. 