title: Reply.
authors.affiliation: College of Marine and Environmental Sciences, James Cook University, Townsville, Australia, Emergency Department, The Townsville Hospital, Townsville, Queensland, Australia, E-mail: denise.blake@health.qld.gov.au.
authors.forename: Denise F
authors.initials: DF
authors.lastname: Blake
authors.affiliation: Mount Isa Centre for Rural and Remote Health, James Cook University, Townsville, Australia, University of Texas-Austin Emergency Medicine, Dell Medical School, Austin, Texas, USA.
authors.forename: Lawrence H
authors.initials: LH
authors.lastname: Brown
keywords: First aid; equipment; letters (to the Editor); performance; transcutaneous oximetry