City Research Online

Abstract

Oxycodone’s respiratory profile (particularly the extent of respiratory depression in comparison to morphine) remains to be fully characterised in the peri-operative period. We randomly assigned ASA 1-2 adults for elective surgery under general anaesthesia to receive saline, morphine 0.1 mg.kg−1, or oxycodone 0.05 mg.kg−1, 0.1 mg.kg−1, or 0.2 mg.kg−1. Results were obtained from six patients in the saline group, 12 patients in the groups receiving morphine 0.1 mg.kg−1, oxycodone 0.05 mg.kg−1 and 0.1 mg.kg−1, and from 10 patients who received oxycodone 0.2 mg.kg−1. Patients were breathing spontaneously and minute ventilation monitored with a wet wedge spirometer for 30 min. All active groups demonstrated significant respiratory depression compared to saline (p < 0.0001 for all groups). The mean (SD) reduction in minute volume from baseline was 22.6% (10.4%) for the morphine 0.1 group and 53.3% (27.2%), 74.4% (12.9%) and 88.6% (13.5%) for the oxycodone 0.05, 0.1 and 0.2 groups, respectively, with significant dose dependent differences between oxycodone groups (p = 0.0007). The extent and speed of onset of oxycodone induced respiratory depression was dose dependent and greater than an equivalent dose of morphine.

Publication Type:	Article
Additional Information:	This is the peer reviewed version of the following article: Chang, S. H., Maney, K., Phillips, J. P., Langford, R. M. & Mehta, V. (2010). A comparison of the respiratory effects of oxycodone versus morphine: a randomised, double-blind, placebo-controlled investigation. Anaesthesia, 65(10), pp. 1007-1012., which has been published in final form at http://dx.doi.org/10.1111/j.1365-2044.2010.06498.x. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Subjects:	R Medicine > RC Internal medicine
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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