CHS Cheat Sheet 2026

The 30 highest-yield CHS facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is a common protocol for hyperbaric therapy treatment duration? → 60 to 120 minutes
2. What is evidence-based practice in CHS Pharmacology & Medication Management? → Integrating research evidence with expertise and client needs
3. What is evidence-based practice in CHS Patient Assessment & Evaluation? → Integrating research evidence with expertise and client needs
4. What is the critical path in CHS project scheduling? → The longest sequence of dependent tasks determining minimum duration
5. What is peer review in CHS Infection Control & Prevention? → Quality evaluation by qualified colleagues for improvement
6. What does residual risk mean in CHS practice? → Risk remaining after all controls are implemented
7. Which physiological condition is a known predisposing factor that significantly increases the risk of CNS oxygen toxicity? → Hypercapnia (elevated CO2)
8. What is a risk matrix used for in CHS practice? → Evaluating risks by plotting likelihood against impact severity
9. How is patient progress typically monitored during hyperbaric therapy? → By observing symptoms and progress
10. What are the five process groups in CHS project management? → Initiating, Planning, Executing, Monitoring & Controlling, Closing
11. Why is hyperbaric oxygen therapy used in treating diabetic foot ulcers? → To improve tissue oxygenation and wound healing
12. What is the primary principle of hyperbaric medicine? → High-pressure oxygen therapy to enhance tissue oxygenation
13. The Unit Pulmonary Toxicity Dose (UPTD) is used in HBO therapy to track: → Cumulative pulmonary oxygen exposure to prevent pulmonary toxicity
14. When assessing a wound for HBOT candidacy using TCOM, a reading that increases to above 200 mmHg in 100% O2 at 1 ATA indicates what? → Adequate vascular supply exists and HBOT is likely to be beneficial
15. What is the role of fire safety procedures in hyperbaric therapy? → To prevent fire hazards in high-oxygen environments
16. What are record retention policies in CHS practice? → Rules defining how long records must be kept and when destroyed
17. What is a risk matrix used for in CHS practice? → Evaluating risks by plotting likelihood against impact severity
18. What is the first step in CHS risk assessment? → Identifying potential hazards and threats
19. Which symptom represents the 'V' in the VENTIDC mnemonic for early CNS oxygen toxicity warning signs? → Visual changes such as tunnel vision
20. Which statement best describes the role of HBOT in treating compromised skin grafts and flaps? → HBOT reduces edema and supports angiogenesis to improve graft survival in at-risk tissue
21. Why is it important to ensure proper ventilation in a hyperbaric chamber? → To prevent fire hazards and maintain oxygen levels
22. What is the primary purpose of a code of ethics in CHS practice? → To establish professional conduct standards and guide ethical decision-making
23. What are principles of good documentation in CHS? → Accuracy, completeness, timeliness, objectivity, and legibility
24. Why is training essential for hyperbaric chamber operators? → To ensure patient safety and equipment efficiency
25. Which of the following conditions is commonly treated with hyperbaric oxygen therapy? → Decompression sickness and chronic wounds
26. The US Navy Treatment Table 6 (TT6) is the standard HBOT protocol for serious DCS. At what pressure is the majority of the treatment conducted? → 3.0 ATA (66 fsw)
27. What is a work breakdown structure in CHS practice? → Hierarchical decomposition of deliverables into manageable work packages
28. Pulmonary (Lorrain Smith) oxygen toxicity is associated with prolonged exposure to a PO2 greater than: → 0.5 ATA
29. How does professional liability insurance protect CHS practitioners? → Covering financial losses from claims of negligence or errors
30. A CHS technologist notes that a patient's transcutaneous oxygen measurement (TCOM) at the wound site is 8 mmHg on room air. What does this finding indicate? → Severely compromised tissue perfusion unlikely to heal without intervention