TY - JOUR T1 - Editor’s Commentary JF - Respiratory Care SP - i LP - i VL - 67 IS - 8 A2 - , Y1 - 2022/08/01 UR - http://rc.rcjournal.com/content/67/8/i.abstract N2 - This Month’s Editor’s Choice is a bench evaluation of the addition of a filter to reduce exhaled aerosol during methacholine delivery for bronchoprovocation testing. Subat et al propose the addition of a viral filter to reduce environmental contamination as a mitigation for virus spread. They used two different nebulizers and compared the delivered dose with and without the filter in line. They found that the addition of a viral filter to the nebulizer exhalation limb did not affect methacholine dose. They suggest that routine use of a viral filter should be considered to improve pulmonary function test (PFT) safety and infection control measures. Haynes provides an accompanying editorial stating that this type of PFT lab personnel protection is long overdue. Exposure to exhaled pathogens is of course a concern in the midst of SARS-CoV-2, but exposure to aerosolized bronchodilators may also impact caregivers.Gogniat and others describe the use of electrical impedance tomography (EIT) to identify lung strain in an ovine model of ARDS. They evaluated EIT images at a fixed tidal volume and PEEP from 0–15 cm H2O in 5 cm H2O increments. With increasing PEEP, respiratory compliance improved and driving pressure fell. The center of ventilation and end expiratory lung impedance determined by EIT were used to develop maps of dynamic relative regional lung strain. EIT showed high strain in ventral lung zones at low PEEP as the result of overdistension of the … ER -