Using accessory muscles implies that the forced expiratory volume in 1 second (FEV1) is decreased to 30% of normal, which is usually between 1.0 and 1.5 liters per second. In such cases, a sitting ...
Chest wall injury is common as a result of major blunt trauma (for example, motor vehicle accidents). It varies in severity from minor bruising or an isolated rib fracture, to severe crush injuries ...