TY - JOUR T1 - Editor’s Commentary JF - Respiratory Care SP - i LP - i VL - 67 IS - 12 A2 - , Y1 - 2022/12/01 UR - http://rc.rcjournal.com/content/67/12/i.abstract N2 - This Month’s Editor’s Choice is a retrospective review of the rate of occult hypoxemia in over 7,500 subjects to determine the impact of race on oximetry accuracy. Chesley and colleagues evaluated over 100,000 paired observations of arterial oxygen saturation () and pulse oximetry saturation () in a mixed race population. Occult hypoxemia was defined as an < 88% when was 92–96%. They found occult hypoxemia was 2.5 times more common in subjects who self-identified as Black and two-thirds of all measurements demonstrated a difference of ≥ 4% ( vs ). The authors recommend a pulse oximetry value of >94–98% in all patients to reduce occult hypoxemia. Moore and others provide accompanying commentary reviewing the well-known impact of skin pigment on oximeter accuracy. They point out that self-identification of race is an unreliable substitute for skin pigment and that retrospective reviews of data where the timing of arterial blood sampling and recording of complicate these comparisons. Moore et al suggest mitigation strategies should include not relying on a single : relationship and that care should be taken when using to define cutoffs for therapeutic decisions. Finally, they urge harmonization of data and prospective data collection.Martí and others evaluated mechanical insufflation-exsufflation (MI-E) in a porcine model using 8 combinations of inspiratory and expiratory pressures. They measured mucus displacement, respiratory flows, respiratory mechanics, and hemodynamics. Velocity and direction of mucus … ER -