Medical Disclaimer

Educational use only

All content on Apex Respiratory — including calculators, guides, references, charts, and practice questions — is provided for education and examination review. It is not medical advice, diagnosis, or treatment, and it does not establish a provider–patient relationship.

Not a substitute for clinical judgment

Nothing on this site replaces clinical judgment, institutional protocols, facility policies, or physician orders. Clinical decisions must always be made by qualified professionals using current, patient-specific information and the governing protocols of their institution.

Verify every calculation

Calculators display their formulas and are tested against published reference values, but software can contain errors and clinical contexts vary. Verify all calculations independently before any clinical application. Reported device gauges, laboratory values, and patient measurements must be confirmed at the bedside.

Currency of information

Respiratory care evolves. Pages list their sources and, when clinical review has occurred, a named reviewer and review date. Despite this, no guarantee is made that any page reflects the most current guidelines at the moment you read it.

Independence

Apex Respiratory is an independent educational resource operated by Apex Ascend Group, LLC. It is not affiliated with, sponsored by, or endorsed by the National Board for Respiratory Care (NBRC), the American Association for Respiratory Care (AARC), or any credentialing body. Credential names (TMC®, CSE®, CRT®, RRT®, ACCS®, NPS®, AE-C®, CPFT®, RPFT®, SDS®) are trademarks of their respective owners, referenced only to describe exam-preparation content.

Emergencies

This website is not for emergencies. In an emergency, follow your institution’s emergency procedures or call your local emergency number.