I believe it is still the case that in the USA they have a dedicated professional called a Respiratory Therapist. The Physio's don't learn the cardiopulmonary treatment in their undergraduate training. Just like they don't learn to apply plasters and the US therefore has Plaster Technicians. These types of structures as the main reasons why USA PT's are unable to work in many other western countries. i.e. The training isn't as broad as they have several professionals doing what in say Australia is taught and later performed by the one professional category.