(CHS) Certified Hyperbaric Specialist Practice Test

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CHS Practice Test

Updated for October 2026
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The CHS (Certified Hyperbaric Specialist) credential is a critical qualification for those working with hyperbaric oxygen therapy (HBOT), which is widely used in medical settings to treat various conditions. As a certified professional, you’ll have the knowledge and skills necessary to safely administer hyperbaric treatments, a field that’s growing as more healthcare facilities incorporate hyperbaric chambers into their services. This guide will walk you through the CHS certification process, including job opportunities, training, and the certification test.

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CHS Practice Test Questions

Prepare for the CHS - Certified Hyperbaric Specialist exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.

CHS Decompression Sickness & Diving Medicine
CHS Exam Questions covering CHS Decompression Sickness & Diving Medicine. Master CHS Test concepts for certification prep.
CHS Wound Care & Tissue Healing
Free CHS Practice Test featuring CHS Wound Care & Tissue Healing. Improve your CHS Exam score with mock test prep.
CHS Clinical Documentation & Records
CHS Mock Exam on Clinical Documentation & Records. CHS Study Guide questions to pass on your first try.
CHS Emergency Procedures & Regulatory Comp...
CHS Test Prep for Emergency Procedures & Regulatory Compliance Questions and Answe. Practice CHS Quiz questions and boost your score.
CHS Emergency Procedures & Response
CHS Questions and Answers on Emergency Procedures & Response. Free CHS practice for exam readiness.
CHS Ethics & Professional Standards
CHS Mock Test covering Ethics & Professional Standards. Online CHS Test practice with instant feedback.
CHS Hyperbaric Equipment Operation & Safety
Free CHS Quiz on Hyperbaric Equipment Operation & Safety. CHS Exam prep questions with detailed explanations.
CHS Hyperbaric Medicine Principles & Physi...
CHS Practice Questions for Hyperbaric Medicine Principles & Physiology. Build confidence for your CHS certification exam.
CHS Infection Control & Prevention
CHS Test Online for Infection Control & Prevention. Free practice with instant results and feedback.
CHS Oxygen Toxicity & Barotrauma Management
CHS Study Material on Oxygen Toxicity & Barotrauma Management. Prepare effectively with real exam-style questions.
CHS Patient Assessment & Evaluation
Free CHS Test covering Patient Assessment & Evaluation. Practice and track your CHS exam readiness.
CHS Patient Evaluation & Treatment Protocols
CHS Exam Questions covering Patient Evaluation & Treatment Protocols. Master CHS Test concepts for certification prep.
CHS Patient Safety & Risk Management
Free CHS Practice Test featuring Patient Safety & Risk Management. Improve your CHS Exam score with mock test prep.
CHS Pharmacology & Medication Management
CHS Mock Exam on Pharmacology & Medication Management. CHS Study Guide questions to pass on your first try.
CHS Treatment Planning & Protocols
CHS Test Prep for Treatment Planning & Protocols. Practice CHS Quiz questions and boost your score.

Key Takeaways

Free Hyperbaric Specialist Practice Test Online

What is a Certified Hyperbaric Specialist?

A CHS (Certified Hyperbaric Specialist) is a trained healthcare professional with expertise in operating hyperbaric chambers and managing hyperbaric oxygen treatments. Specialists in this field are skilled in:

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What is CHS Certification?

CHS Certification is a credential that verifies an individual’s training and expertise in hyperbaric medicine. Offered by accredited organizations, this certification emphasizes the following core competencies:

Certified Hyperbaric Specialist Salary

The salary for a Certified Hyperbaric Specialist varies based on factors such as experience, location, and the healthcare facility. According to industry standards, CHS professionals can expect competitive salaries in the medical field, with averages ranging as follows:

Hyperbaric Certification Course Online

Several reputable institutions offer online Hyperbaric Certification Courses, providing a flexible learning option for aspiring CHS professionals. Here’s what you need to know:

CHS Certification

The CHS (Certified Hyperbaric Specialist) Certification is a recognized credential for healthcare professionals working in hyperbaric medicine. Here’s a step-by-step guide to earning your CHS certification:

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Conclusion

Earning a CHS (Certified Hyperbaric Specialist) designation opens doors to a specialized healthcare career, combining patient care with advanced medical treatments. This credential not only boosts professional credibility but also aligns with the growing demand for skilled specialists in hyperbaric oxygen therapy. Whether you’re already in the healthcare industry or looking to transition into a niche field, becoming a CHS can provide job stability, a competitive salary, and the opportunity to make a meaningful impact on patient health.

Pros

  • Validates your knowledge and skills objectively
  • Increases job market competitiveness
  • Provides structured learning goals
  • Networking opportunities with other certified professionals

Cons

  • Study materials can be expensive
  • Exam anxiety can affect performance
  • Requires dedicated preparation time
  • Retake fees apply if you don't pass

Pros and Cons at a Glance

ProsCons
Validates your knowledge and skills objectivelyStudy materials can be expensive
Increases job market competitivenessExam anxiety can affect performance
Provides structured learning goalsRequires dedicated preparation time
Networking opportunities with other certified professionalsRetake fees apply if you don't pass

Sample Certified Hyperbaric Specialist Practice Questions

Try these questions from our free Certified Hyperbaric Specialist practice tests. The correct answer and an explanation follow each question.

  1. What is the principle behind oxygen toxicity in hyperbaric therapy?

    • A. Improved tissue oxygenation
    • B. Damage to tissues from high oxygen levels
    • C. Enhanced cell regeneration
    • D. Increased blood pressure

    Answer: B. Damage to tissues from high oxygen levels

    Oxygen toxicity occurs when tissues are exposed to excessively high partial pressures of oxygen for prolonged periods. This leads to the formation of reactive oxygen species, which can damage cells, proteins, and DNA. In hyperbaric therapy, careful monitoring of oxygen levels and exposure duration is crucial to prevent this adverse effect.

  2. Oxygen breathing breaks during USN Treatment Tables are provided to prevent what complication?

    • A. Nitrogen narcosis
    • B. Central nervous system (CNS) oxygen toxicity seizures
    • C. Decompression sickness from the treatment itself
    • D. Ear barotrauma

    Answer: B. Central nervous system (CNS) oxygen toxicity seizures

    Air breaks during treatment tables reduce cumulative CNS oxygen exposure, lowering the risk of oxygen toxicity seizures without significantly compromising the treatment's therapeutic effectiveness.

  3. What is a common protocol for hyperbaric therapy treatment duration?

    • A. 15 minutes
    • B. 30 minutes
    • C. 60 to 120 minutes
    • D. 4 hours

    Answer: C. 60 to 120 minutes

    The typical duration for a single hyperbaric oxygen therapy session generally ranges from 60 to 120 minutes. This timeframe is established to allow sufficient exposure to hyperbaric oxygen for therapeutic effects to occur, while also balancing the risk of oxygen toxicity and patient comfort. Specific durations can vary based on the treated condition and physician's protocol.

  4. What is a key safety measure when operating a hyperbaric chamber?

    • A. To monitor pressure and oxygen concentration
    • B. To monitor patient heart rate
    • C. To ensure room temperature stability
    • D. To limit oxygen intake

    Answer: A. To monitor pressure and oxygen concentration

    Monitoring pressure and oxygen concentration is paramount in a hyperbaric chamber to ensure patient safety and treatment efficacy. Incorrect pressure can lead to barotrauma, while improper oxygen levels can result in either insufficient therapeutic effect or dangerous oxygen toxicity. Continuous monitoring allows operators to maintain the precise therapeutic environment required for safe and effective treatment.

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CHS Questions and Answers

What is the CHS certification exam?

The CHS (Certified Hyperbaric Specialist) exam is administered by the National Board of Diving and Hyperbaric Medical Technology (NBDHMT). It validates the knowledge and competency of technicians who operate hyperbaric chambers and assist with hyperbaric oxygen therapy treatments. Passing this exam demonstrates proficiency in safe chamber operations, patient care, and emergency procedures.

How many questions are on the CHS exam?

The CHS certification exam consists of 150 multiple-choice questions. Candidates are given three hours to complete the test. The questions cover core hyperbaric medicine topics including physics, physiology, chamber operations, safety protocols, and patient management. Not all questions are scored, as some serve as unscored pilot items for future exams.

What is the passing score for the CHS exam?

The NBDHMT requires a scaled score of 75% or higher to pass the CHS exam. The passing standard is determined through a criterion-referenced scoring method, meaning it reflects a minimum competency level rather than a curve. Candidates receive their preliminary results immediately after completing the computer-based test, with official results mailed within several weeks.

What topics are covered on the CHS exam?

The CHS exam covers hyperbaric physics (gas laws, pressure relationships), physiology and pathophysiology, clinical hyperbaric medicine indications, chamber operations and maintenance, safety procedures and fire prevention, emergency protocols, infection control, and patient assessment. Candidates should also study decompression theory, wound care basics, and the regulatory standards set by UHMS, NFPA 99, and PVHO guidelines.

What are the eligibility requirements for the CHS exam?

To sit for the CHS exam, candidates must hold current certification in Basic Life Support (BLS) and have completed a minimum of 480 hours of documented clinical experience in a hyperbaric medicine facility. Candidates must also complete an NBDHMT-approved introductory course in hyperbaric medicine. A supervisory reference confirming clinical competency is required as part of the application.

How do I register for the CHS certification exam?

Registration is handled through the National Board of Diving and Hyperbaric Medical Technology website. Candidates submit an online application with documentation of clinical hours, BLS certification, and course completion. After the application is approved, candidates receive authorization to schedule their exam at a PSI testing center. The exam fee is approximately $250, and testing windows are available year-round.

How often must CHS certification be renewed?

CHS certification must be renewed every five years. Renewal requires completion of continuing education credits in hyperbaric medicine, maintenance of current BLS certification, and documentation of ongoing clinical practice. The NBDHMT requires a minimum number of continuing education hours specific to hyperbaric topics. Failure to renew on time may require retaking the full certification exam.

What are the best ways to prepare for the CHS exam?

Effective preparation includes studying the UHMS Hyperbaric Oxygen Therapy Indications manual, reviewing gas law calculations, and taking practice tests that mirror the exam format. Focus on chamber safety protocols, NFPA 99 standards, and clinical indications for hyperbaric oxygen therapy. Hands-on clinical experience is essential, and many candidates benefit from study groups with other hyperbaric technicians at their facility.
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