RT Journal Article SR Electronic T1 Loss of resistance technique for lumbar sympathetic block (audio-visual) JF Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 91 OP 91 DO 10.1136/rapm-00115550-198813011-00091 VO 13 IS Suppl 1 A1 Lorraine M. Arias A1 Robert Woo YR 1988 UL http://rapm.bmj.com/content/13/Suppl_1/91.abstract AB