Complex sentence: Postural drainage is essential in treating bronchiectasis and patients must receive physiotherapy to learn to tip themselves into a position in which the lobe to be drained is uppermost at least three times daily for up to 30 minutes.
Split into simpler sentences: Postural drainage is essential in treating bronchiectasis and patients must receive physiotherapy to learn to tip themselves into a position in which the lobe to be drained. It is done for at least three times daily for up to 30 minutes.