Randomized Controlled Trial
Low volume and high concentration of local anesthetic is more efficacious than high volume and low concentration in Labat's sciatic nerve block: a prospective, randomized comparison.
Anesth. Analg. 2008 Dec 1;107(6):2085-8.
Randomized Controlled Trial
Spinal anaesthesia for elective surgery: a comparison of hyperbaric solutions of racemic bupivacaine, levobupivacaine, and ropivacaine.
Br J Anaesth. 2008 Nov 1;101(5):705-10.
Randomized Controlled Trial
Comparison of 3 intensities of stimulation threshold for brachial plexus blocks at the midhumeral level: a prospective, double-blind, randomized study.
Reg Anesth Pain Med. 2009 Jul 1;34(4):296-300.