Expiratory Rib Cage Compressions to Improve Secretion Clearance During Mechanical Ventilation: Not Only a Matter of Squeezing the Chest

To the Editor: We read with interest the manuscript by Guimaraes et al,[1][1] who assessed in humans the pulmonary effects of manual rib cage compressions (MRCCs). The authors found a mild increase in the amount of cleared airway secretions with the use of MRCCs and no effects on respiratory