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.
O tratamento non só incrementa os niveis de osíxeno no sangue do paciente, senón que ten o efecto secundario de diminuír a resistencia ao fluxo do sangue en moitos tipos de pulmóns doentes, facilitando o traballo de bombeo do corazón.