15 Lung Failure Symptoms You May Already Have (But Don’t Know!) October 24, 2025October 4, 2025 by leonma PrevFinal Thoughts Lung failure symptoms often creep in slowly. Early recognition and testing (especially Pulse Oximetry, ABG, Chest Imaging, and Pulmonary Function Tests) can save lives. PrevPages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16