1995 OPEN FORUM Abstracts
A SIMPLE MODEL FOR TEACHING THE VARIABLES EFFECTING FDO2 AND FIO2 WITH COMMON OXYGEN DELIVERY DEVICES
Robert M. Keller, BA, RRT and Jim Fink, MS, RRT Hines VA Hospital and Loyola Univ. Chicago, Stritch School of Medicine, Hines IL.
Effective use of oxygen administration devices requires an understanding of device limitations as well as variables that affect FDO2 and FIO2. In our institution we had noted clinicians with unrealistic expectations of oxygen device performance during clinical use. We built a simple patient analog consisting of a selfinflating resuscitation bag without valve (PMR, Puritan) connected via aerosol tubing to a mannequin head (from a Resusci-Annie, Laerdal) with an oxygen analyzer and spirometer in line.
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The bag was squeezed to simulate patient respiratory rate and tidal volume, while oxygen devices placed on the head were operated at various oxygen flow rates. In a pretest, a group of 30 residents, nurses and RCPs consistently overestimated FIO2 based on references from standard texts. Upon completion of a 30 minute lab session, participants were able to more accurately estimate range of FIO2 based for each device, based on liter flow, respiratory rate and tidal volume (p < 0.001). We conclude that use of this simple laboratory model provides clinicians with a more realistic expectation for O2 delivery device performance in the clinical setting.