Treatment not only increases oxygen levels in the patient's blood, but has the secondary effect of decreasing resistance to blood flow in many types of diseased lungs, easing work load on the heart.
Behandlingen øger ikke blot iltniveauet i patientens blod, men har også den bivirkning at det sænker modstanden mod blodgennemstrømning i mange former for syge lunger, hvilket letter hjertets arbejde.