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Payam Morgan, Kristin Hirabayashi, Jeffery Joseph, Jeremiah Tao; A Comparison of Techniques of Reducing Oculofacial Surgical Field Fire Risk Due to Oxygen. Invest. Ophthalmol. Vis. Sci. 2013;54(15):743.
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To compare the efficacy and comfort of a mid-face seal drape, a modified nasal prong, and the on off method in reducing fire risk from nasal cannulated oxygen delivery.
Controlled experiments in human subjects comparing the oxygen concentration with a mid-face seal drape, on-off method and modified prong method with the use of an oxygen detector. Oxygen concentrations were measured at 9 facial surgical locations with nasal cannula flow rates of 2L/min, 4L/min, 6L/min of 100% FiO2 in the above three conditions. The human subjects completed a survey assessing the comfort of each method.
The mean oxygen concentration in the oculofacial surgical field with the mid-face seal drape was 20.4%, 25.1% in the on-off method, and 22.3% in the modified prong method. The mean difference between each group was statistically significant with p <0.05. The mid-face draped condition provided safe oxygen concentration levels at all anatomic landmarks at all three flow rates, while the on-off method was associated with supra-threshold oxygen concentration levels at 6 of 27 measurements. The modified prong level showed supra-threshold levels at higher flow rates only. The mid-face seal drape and the on-off method were significantly more comfortable for the subjects.
A mid-facial seal drape or a modified nasal prong reduced oxygen concentrations from nasal cannula oxygen in the oculofacial surgical field more effectively than the on off method.The seal drape technique may offer the additional advantage of better comfort.
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