About CHRN Exam Prep
An independent practice platform for the Certified Hyperbaric Registered Nurse (CHRN) exam - real questions across every exam domain, each with a plain-language explanation.
What's on the CHRN exam
The Certified Hyperbaric Registered Nurse (CHRN) exam is organized into 16 knowledge domains. It has 120 questions and is completed in 2 hours. Here is what it covers:
- History of Undersea and Hyperbaric Medicine
- The Physical Aspects of Undersea and Hyperbaric Medicine
- The Physiological Aspects of Undersea and Hyperbaric Medicine
- Mechanisms and Theory of Decompression
- Therapeutic Mechanisms Associated with Hyperbaric Oxygen Exposure
- Currently Accepted Indications for Hyperbaric Oxygen Exposure
- Oxygen Toxicity
- Other Potential Complications
- The Hyperbaric Medicine Facility
- Hyperbaric Safety I. Protecting the Environment
- Hyperbaric Safety II. Protecting the Patient
- Understanding of the NFPA guidelines for hyperbaric chambers
- Transcutaneous Oxygen Monitoring
- Nursing Management of the Patient Undergoing Hyperbaric Oxygen Therapy
- Nursing Standards of Practice: Ref BNA Hyperbaric Nursing Standards found on BNA website
- Understanding of basic operation of all hyperbaric chambers including Monoplace and Multiplace chambers
Every practice question on this site is organized across these 16 domains, so your study tracks the real exam structure instead of guesswork. As you answer, the per-domain analytics surface the areas still costing you points, so your review goes where it moves your score.
What we believe good exam prep looks like
Realistic practice beats passive reading. Every question is written to mirror the style and difficulty of the real exam, with a clear explanation of why the right answer is right and the others aren't.
Your weak spots should find you. Domain analytics, mistake review, and re-drilling are built in, so study time goes where it moves your score.
Pricing should be simple. One payment for a fixed access window matched to your exam date. No subscription, no auto-renewal, and 10 free questions to try before you spend anything.
Get in touch
Questions, feedback, or something not working? Email support@boardmentor.study - candidate messages are read and answered.