Photoplethysmography as an Indicator of Onset of Epidural Block
Kamil Mustafa, Ralph A. Milliken, Dante V. Bizzarri, Pravin Shah
Regional Anesthesia: The Journal of Neural Blockade in Obstetrics, Surgery, & Pain Control Jul 1983, 8 (3) 114-116; DOI: 10.1136/rapm-00115550-198308030-00007