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Is peripheral oxygen saturation a reliable predictor of upper airways air-flow limitation?

from The Journal of Emergency Medicine

Dyspnea secondary to acute upper airways airflow limitation represents a clinical emergency that can be difficult to recognize without a suitable history; even when etiology is known, parameters to assess the severity are unclear and often improperly used. For this study, the authors proposed an experimental model of upper airway obstruction by a progressive increase of UAAFL. Ten healthy volunteers randomly underwent ventilation for 6 min with different degrees of UAAFL. SpO2, heart rate, respiratory rate, tidal volume, accessory respiratory muscle activation and subjective dyspnea indexes were measured. more

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