title: Upgraded software changes the oxygen sensor calibration procedure in Covidien's Puritan Bennett 840 ventilator.
abstract: Users need to be aware that once Covidien's Puritan Bennett 840 ventilators have received upgraded software for the neonatal configuration, a different procedure will usually be required when calibrating the units' oxygen sensor for neonatal use. Since the function of the previous "100% O2/cal 2 min" key--which some users employed for this calibration--has now changed, users should instead perform calibration through the "More Settings" menu.
mesh_terms: D004867:Equipment Design; D004869:Equipment Safety; D006801:Humans; D009359:Neonatology; D012984:Software; D012122:Ventilators, Mechanical