This document provides information on postural drainage techniques used in physiotherapy to clear secretions from the lungs. It defines postural drainage as positioning patients using gravity to drain secretions from smaller to larger airways to be cleared. The goals are to prevent accumulation and remove secretions from the lungs in patients with pulmonary diseases or on prolonged bed rest. Various manual techniques including percussion, vibration, and positions are described to drain each lung segment. Contraindications are also outlined.