Abstract
Although they were not the first to observe it, a seminal paper by Danek et al. (1980) ushered in a decade of concern for oxygen supply dependency in critically ill patients. That concern continues today with some urgency because of the uncertainty of what it means. The observation made by Danek et al. (1980) was that O2 uptake (VO2) varied directly with O2 delivery (DO2) even at very high delivery rates in patients that were critically ill with adult respiratory distress syndrome (ARDS). A similar linear relationship between VO2 and DO2 was not seen in another group of critically ill ventilator patients who had not been diagnosed with ARDS. In this and in the earlier studies, it appeared that O2 demand was higher than expected and was not satisfied in ARDS patients even if DO2 were raised to well above normal resting levels. The authors suggested that this was due to a possible disturbance of normal regulatory control of blood flow in the periphery as well as a possible disruption of cellular structure with mitochondrial dysfunction.
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Cain, S.M. (1992). Oxygen Supply Dependency in the Critically Ill — A Continuing Conundrum. In: Erdmann, W., Bruley, D.F. (eds) Oxygen Transport to Tissue XIV. Advances in Experimental Medicine and Biology, vol 317. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3428-0_4
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DOI: https://doi.org/10.1007/978-1-4615-3428-0_4
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