MRCP2-4517

MRCP2-4517

A 67-year-old man comes to the respiratory clinic for evaluation. He has been diagnosed with idiopathic pulmonary fibrosis, but his condition did not improve after taking oral corticosteroids. He is struggling to climb stairs more than once a day and has difficulty leaving his home. During the examination, his blood pressure is 138/88 mmHg, his pulse is regular at 80 beats per minute. There are inspiratory crackles on chest auscultation, indicating pulmonary fibrosis, and his O2 saturation is 92% at rest. His FVC is 65% of predicted. What is the most appropriate next step in management?