: The COVID-19 outbreak has necessitated the prolonged use of N95 facemasks in addition to traditional surgical facemasks by healthcare workers. The aim of this study was to investigate the effect of wearing N95 facemasks in addition to surgical facemasks on peripheral oxygen saturation (SpO) and heart rate (HR) among dental professionals during routine care. : This prospective study compared SpO and HR between dental providers wearing N95 + surgical facemasks vs. wearing a surgical facemask only. SpO and HR were recorded using a portable pulse oximeter before wearing the facemask (T0); at 30 min (T1); at 1 h (T2); and at the end of clinical activity (T3). Inter-group and intra-group differences were assessed with independent tests and repeated measures ANOVA, respectively. : A total of 88 participants (57 wearing N95 + surgical facemasks, and 31 wearing a surgical facemask only) completed the study. The two groups did not statistically differ in SpO at different timepoints nor showed any intra-group differences. The participants wearing N95 + surgical facemasks exhibited a statistically higher HR at T0 ( = 0.007), T2 ( = 0.010), and T3 ( = 0.014) compared to those wearing a surgical facemask only. A statistically significant decrease was observed in HR between T0 and T3 in those wearing N95 + surgical facemasks ( = 0.012). No intra-group differences were seen in HR over time in those wearing a surgical facemask only. The continuous use of an N95 in addition to a surgical facemask did not show any significant effects in SpO during routine care; however, the concurrent use of an N95 and a surgical facemask seemed to be accompanied by a decrease in HR, although the values remained within the normal range.
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| http://dx.doi.org/10.3390/medicina60020276 | DOI Listing |
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- It involved a survey and measurements of carbon dioxide and oxygen levels before and after shifts, with 39 subjects participating.
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