Effectiveness of Morphine, Fentanyl, and Methoxyflurane in the Prehospital Setting

AbstractObjective. To compare the effectiveness of intravenous (IV) morphine, intranasal (IN) fentanyl, and inhaled methoxyflurane when administered by paramedics to patients with moderate to severe pain. Methods. We conducted a retrospective comparative study of adult patients with moderate to severe pain treated by paramedics from the Ambulance Service of New South Wales who received IV morphine, IN fentanyl, or inhaled methoxyflurane either alone or in combination between January 1, 2004, and November 30, 2006. We used multivariate logistic regression to analyze data extracted from a clinical database containing routinely entered information from patient health care records. The primary outcome measure was effective analgesia, defined as a reduction in pain severity of ≥30% of initial pain score using an 11-point verbal numeric rating scale (VNRS-11). Results. The study population comprised 52,046 patients aged between 16 and 100 years with VNRS-11 scores of ≥5. All analgesic agents were effective in t...