Respiratory Disease Testing is lung function test is the diffusing capacity test, which measures how well oxygen passes from the lungs into the bloodstream. The test involves breathing a gas mixture containing carbon monoxide and oxygen and then measuring how much carbon monoxide is absorbed from the lungs into the bloodstream. A reduced diffusing capacity may suggest interstitial lun... https://medium.com/@prachicmi1/respiratory-disease-testing-how-advanced-technologies-are-transforming-diagnosis-and-treatment-385b95b9f7a8