Reference Nickol AH, Hart N, Hopkinson NS, Moxham J, Simonds A, Polkey MI. (2005) Mechanisms of improvement of respiratory failure in patients with restrictive thoracic disease treated with non-invasive ventilation. Thorax Sep; 60(9):754-60 More RLD What is restrictive lung disease? Restrictive lung disease refers to conditions in which breathing is restricted, and can lead to long-term respiratory failure. Why is it important to treat restrictive lung disease? Treating the breathing and sleeping issues caused by restrictive lung disease disorders can make a huge difference in your quality of life. Treatment options for restrictive lung disease (RLD) ResMed has developed therapy devices and ventilators that can help you feel better during the day and sleep better at night, so you can get the most out of life.