7Fanelli G, Casati A, Garancini P, et al. Nerve stimulator and multiple injection technique for upper and lower limb blockade: failure rate, patient acceptance, and neurologie complications. Study Group on Regional Anesthesia. Anesth Analg, 1999,88:847 852.
8Marhofer P, Greher M, Kapral S. Ultrasound guidance in regional anaesthesia. Br J Anaesth, 2005,94:7-17.
9Williams SR,Chouinard P, Arcand G, et al. Ultrasound guidance speeds execution and improves the quality of supraelavieular block. Anesth Analg, 2003,97 : 1518-1523.
10Liu FC.Liou JT,Tsai YF,et al. Efficacy of ultrasound-guided axillary brachial plexus block: a comparative study with nerve stimulator-guided method. Chang Gung Med J, 2005,28 : 396-402.
