[1] A CRT or RRT is typically expected to adjust, modify or recommend therapeutic techniques within well-defined procedures based on a limited range of patient responses.
In the healthcare setting, usually required supervision by a physician experienced in respiratory care.
From the 1980s through the 2000s, 49 states passed legislation relying on results from the certification examination as a central component in the regulation of respiratory therapists.
However, the RRT credential is preferred in the vast majority of healthcare facilities in the United States.
The RRT is considered an advanced respiratory therapist, a CRT an entry level.