A respiratory therapist (RT) helps people breathe: you run ventilators, give oxygen and inhaled medicines, draw and read arterial blood gases, and respond when someone's airway or breathing fails. In the US you need an associate degree at minimum from a CoARC-accredited program, then the NBRC credentials (TMC exam to earn the CRT, and the Clinical Simulation Exam to earn the RRT) and a state license in nearly every state. Plan on roughly 2 to 3 years of school and clinicals. The roadmap below teaches the science first (why lungs fail), then the equipment (how we support them), then judgment (w
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Stage 1 of 4 · about 12 weeks
Learn the body and the physics behind breathing: anatomy of the airway and lungs, ventilation vs oxygenation, gas laws, acid-base basics, medical terminology, and how to take vital signs and read a pulse oximeter. Finish able to explain, in plain words, why a patient with pneumonia has low oxygen and what oxygen therapy does about it. Check yourself by teaching it to a friend. Also prepare for program admission: prerequisites like anatomy and physiology, college algebra, chemistry, and microbiology, plus CPR/BLS.
Medical terminology and airway-lung anatomy
Every order, chart note, and handoff you will read is written in this language, and every treatment you give acts on a specific place in the airway or lung. If you know the map, the rest makes sense.
Ventilation, oxygenation, and the gas laws
This is the heart of the job. Ventilators control ventilation and oxygenation separately, and you cannot choose the right fix until you know which one is failing. The gas laws explain why oxygen cylinders, altitude, and dissolved gases behave as they do.
Acid-base basics
Arterial blood gases are among the main tools you will use to judge a patient. Before you can read one in the Job-ready stage, you need to understand what pH, CO2, and bicarbonate mean and why the body keeps them in a narrow range.
Vital signs and pulse oximetry
Vital signs are the first data you collect on every patient and the first place a problem shows up. Doing them accurately and recording them clearly is a basic habit that every employer expects.
Prerequisites and program admission
Respiratory therapists need an accredited degree program to sit for the national exam, so getting admitted is your gateway. Programs are competitive and prerequisites matter, so planning early saves time and money.
Then 3 more stages (about 140 weeks in all) with lessons, drills, projects, 10 interview questions with strong answers and free resources.