Respiratory therapy exists because breathing is the one body function you cannot live without for more than a few minutes, and a surprising number of conditions can compromise it. Respiratory therapists (RTs) are the specialists hospitals rely on to manage ventilators, respond to breathing emergencies, help premature infants survive their first hours, and keep people with chronic lung disease out of the hospital. Whether you’re exploring this as a career or trying to understand why the field matters, the short answer is that modern medicine simply doesn’t function without it.
What Respiratory Therapists Actually Do
The scope of respiratory therapy is much broader than most people realize. At its core, the profession centers on evaluating and treating anyone who has trouble breathing, from a 24-week premature infant to an 80-year-old with emphysema. But the day-to-day work varies dramatically depending on the setting.
In intensive care units, RTs work alongside physicians to manage mechanical ventilators. This means interpreting pressure and airflow waveforms in real time, adjusting settings to match a patient’s changing needs, and recognizing problems like a mismatch between the machine’s rhythm and the patient’s own breathing effort. Catching those mismatches early can prevent serious lung injury. RTs also manage the process of weaning patients off ventilators, a gradual, high-stakes transition that requires constant reassessment.
During emergencies, RTs are core members of rapid response teams. When a patient on a general hospital floor starts deteriorating, the team that arrives typically includes a critical care nurse, a respiratory therapist, and a physician. The RT’s job is airway management: making sure the patient can breathe, delivering oxygen, and providing manual ventilation if needed. In cardiac arrest situations, they perform the same role on code blue teams.
RTs also run key diagnostic tests. An arterial blood gas test, one of the most common procedures they perform, measures how much oxygen and carbon dioxide is dissolved in your blood, along with your blood’s acid-base balance. These numbers tell clinicians how well your lungs are moving gases in and out, and they guide treatment decisions in real time. Pulmonary function tests, which measure lung capacity and airflow, are another routine part of the job.
Why It Matters in Critical Care
Ventilator management is one of the clearest examples of why respiratory therapy is a standalone profession rather than a task shared among nurses or doctors. Modern ventilators generate complex data, and reading that data correctly requires specialized training. An RT who can identify auto-triggering (when the machine delivers a breath the patient didn’t ask for) or flow starvation (when the machine isn’t delivering air fast enough to meet a patient’s demand) is actively preventing harm.
The consequences of getting this wrong are significant. Ventilator-induced lung injury is a well-documented complication in ICUs, and it can worsen outcomes for patients who are already critically ill. Having trained specialists at the bedside, analyzing waveforms and adjusting settings throughout the day, is one of the primary safeguards against it.
Keeping Premature Infants Alive
Neonatal care is where respiratory therapy becomes lifesaving in the most literal sense. Premature babies often have underdeveloped lungs that cannot inflate properly on their own. Among infants born at 22 to 26 weeks of gestation, over 96% require a lung-coating substance called surfactant to help their tiny air sacs stay open. Even at 27 to 31 weeks, nearly 59% need it.
Respiratory therapists in neonatal ICUs manage the full spectrum of breathing support for these infants, from gentle nasal airflow devices to high-frequency ventilators that deliver hundreds of tiny breaths per minute. The field has evolved toward less invasive approaches over time, and RTs are central to that shift, using techniques that support a newborn’s breathing with the least possible damage to fragile lung tissue.
Managing Chronic Lung Disease
Outside the hospital, respiratory therapy plays a major role in keeping people with COPD and asthma healthier and out of emergency rooms. Programs led by respiratory therapists focus on teaching patients how to manage their conditions day to day: recognizing early warning signs of a flare-up, using inhalers correctly, following action plans, and knowing when to start treatment on their own before things escalate.
The evidence behind this work is strong. A study of asthma education delivered by respiratory therapists found substantial improvements across the board, including fewer unscheduled doctor visits, fewer ER trips, fewer hospitalizations, and fewer missed days of work and school. Quality of life improved significantly. A large review confirmed that these self-management strategies reduce the need for emergency care without increasing overall healthcare costs.
For chronic cough, a common and often undertreated problem, respiratory therapists in one program achieved outcomes comparable to those of lung specialists, with more patient contacts per case (4.9 versus 2.7) and a higher rate of cough resolution.
Reducing Hospital Readmissions
One of the strongest arguments for respiratory therapy’s value comes from readmission data. COPD is one of the leading causes of preventable hospital readmissions, and each readmission is costly, disruptive, and dangerous for the patient.
A program that sent respiratory therapists to visit COPD patients at home after discharge cut 30-day readmission rates nearly in half, from 22.3% to 12.2%. The effect held up after adjusting for age, sex, race, and smoking status, and it extended to 60-day and 90-day readmissions as well. At the 90-day mark, patients in the program were 80% less likely to be readmitted than those who received standard post-discharge care.
Pulmonary Rehabilitation
For people living with chronic lung conditions, pulmonary rehabilitation is a structured program that respiratory therapists help design and deliver. According to the National Heart, Lung, and Blood Institute, these programs typically include three pillars: exercise training to strengthen the arms, legs, back, and breathing muscles; nutritional counseling to ensure patients are eating in ways that support their condition; and education, including smoking cessation support. The goal is to build enough stamina and flexibility that everyday activities become manageable again.
Advanced and Expanding Roles
Respiratory therapists increasingly work with some of the most advanced technology in medicine. In ECMO, a life-support system that takes over the work of the heart and lungs, RTs serve as specialists responsible for maintaining normal blood oxygen and carbon dioxide levels, managing blood products, delivering medications through the circuit, and monitoring anticoagulation to prevent clotting. This role requires additional training beyond standard credentialing, and it places RTs at the center of care for the sickest patients in the hospital.
Career Path and Credentials
Becoming a respiratory therapist requires completing an accredited program and passing a national board examination. The credentialing system has two levels. Scoring above the lower threshold on the board exam earns you the Certified Respiratory Therapist (CRT) credential. Scoring above the higher threshold makes you eligible for an additional clinical simulation exam, and passing both earns you the Registered Respiratory Therapist (RRT) credential. All 49 states that regulate the profession use one of these credentials as the basis for licensure.
The educational foundation includes coursework in anatomy and physiology, chemistry, microbiology, and mathematics, with a minimum of 62 semester hours of college credit. Most RTs complete an associate’s or bachelor’s degree program, though the field is trending toward bachelor’s-level entry.
Salary and Job Outlook
Respiratory therapists earn an average of $97,576 per year in the United States, or roughly $47 per hour. The range is wide: those at the 25th percentile earn around $80,360, while those at the 75th percentile bring in about $105,300. The top 10% earn close to $138,000 annually. Demand for the profession continues to grow, driven by an aging population, rising rates of chronic lung disease, and the expanding roles RTs fill in critical care, neonatal units, and home health settings.