RT Journal Article SR Electronic T1 Confirmation of Epidural Catheter Placement Using Nerve Stimulation in Obstetric Patients: The Tsui Test. JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 35 OP 35 DO 10.1136/rapm-00115550-199823031-00035 VO 23 IS Suppl 1 A1 Ban C.H. Tsui A1 S. Gupta A1 B. Finucane YR 1998 UL http://rapm.bmj.com/content/23/Suppl_1/35.abstract AB