Journal article
Performance of an active inspired hypoxic guard
IE Ghijselings, S De Cooman, R Carette, PJ Peyton, AM De Wolf, JFA Hendrickx
Journal of Clinical Monitoring and Computing | SPRINGER HEIDELBERG | Published : 2016
Abstract
Current hypoxic guards systems fail to maintain the inspired O2 concentration (FIO2) ≥ 21 % across the entire fresh gas flow (FGF) range when a second carrier gas is used (N2O or air). We examined the performance of the Maquet O2 Guard®, a smart hypoxic guard that increases O2 delivery if an inspired hypoxic mixture is formed. After obtaining IRB approval and informed consent, 12 ASA I-II patients were enrolled. During anesthesia with sevoflurane in O2/air, the O2 Guard® was tested by administering O2/air at the following delivered hypoxic guard limits [expressed as (total FGF in L min−1; FDO2 in %)] for 4 min each: [0.3;67], [0.4;50], [0.6;34], [0.8;25], [1.0;21], [1.2;21], [1.5;21], [2;21]..
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Funding Acknowledgements
The authors declare that they have no conflict of interest, but Jan Hendrickx received lecture support, travel reimbursements, equipment loans, consulting fees and/or meeting organizational support from a number of companies involved with inhaled agent delivery (alphabetically): AbbVie, Acertys, Air Liquide, Allied healthcare, Armstrong Medical, Baxter, Draeger, GE, Hospithera, Heinen und Lowensein, Intersurgical, Maquet, MDMS, MEDEC, Micropore. Molecular, NWS, Philips, Quantum Medical. The FLOW-i tested in this study has been provided by Maquet on a temporary basis.