This document discusses chest physiotherapy techniques for managing critically ill patients from a physiotherapist's perspective. It describes techniques like positioning, chest percussion, vibration and manual hyperinflation which help mobilize secretions in the lungs. The goals of these techniques are to prevent accumulation of secretions, improve drainage and promote better breathing patterns and respiratory function. Specific techniques covered include various positioning methods, chest tapotements like clapping, vibration and rib springing, as well as manual hyperinflation and airway suctioning. Evidence on the benefits of positioning include increased lung volumes and compliance and improved ventilation.