CHT Hyperbaric Medicine Fundamentals 1 — Questions and Answers

Question 1: What is the primary function of hyperbaric oxygen therapy (HBOT)?

Increase nitrogen absorption.
Enhance tissue oxygenation and healing (Correct answer)
Reduce blood pH.
Stimulate adrenaline production.

Correct answer: Enhance tissue oxygenation and healing

Hyperbaric oxygen therapy (HBOT) works by delivering 100% oxygen at pressures greater than atmospheric pressure. This significantly increases the amount of oxygen dissolved in the blood plasma, allowing it to reach tissues that are hypoxic or poorly perfused. The elevated oxygen levels promote healing, reduce inflammation, and support the body's natural repair processes, making enhanced tissue oxygenation its primary function.

Question 2: Which gas law is most relevant to HBOT?

Boyle’s Law.
Charles’s Law.
Henry’s Law (Correct answer)
Dalton’s Law.

Correct answer: Henry’s Law

Henry's Law states that the amount of gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid. In HBOT, this law explains how increasing the ambient pressure in the chamber and administering 100% oxygen causes a greater amount of oxygen to dissolve into the patient's blood plasma. This increased dissolved oxygen is crucial for the therapeutic effects of HBOT.

Question 3: Which condition is an approved indication for HBOT?

Seasonal allergies.
Carbon monoxide poisoning (Correct answer)
Mild anxiety.
Acne.

Correct answer: Carbon monoxide poisoning

Carbon monoxide poisoning is a critical approved indication for HBOT because carbon monoxide binds to hemoglobin much more readily than oxygen, preventing oxygen transport. HBOT rapidly displaces carbon monoxide from hemoglobin and tissues by significantly increasing the partial pressure of oxygen. This restores oxygen delivery to vital organs and reduces neurological damage, making it a life-saving treatment.

Question 4: What is the usual pressure used in HBOT chambers?

1.0 ATA
2.5 ATA (Correct answer)
4.5 ATA
0.5 ATA

Correct answer: 2.5 ATA

The typical therapeutic pressure used in hyperbaric oxygen therapy (HBOT) chambers for most approved indications ranges from 2.0 to 3.0 atmospheres absolute (ATA). A pressure of 2.5 ATA is a common and effective setting that allows for significant increases in dissolved oxygen in the blood. This pressure optimizes therapeutic benefits while minimizing the risk of oxygen toxicity and barotrauma.

Question 5: Which side effect is most associated with HBOT?

Tooth decay.
Hair loss.
Middle ear barotrauma (Correct answer)
Sunburn.

Correct answer: Middle ear barotrauma

Middle ear barotrauma is the most common side effect associated with HBOT because the pressure changes inside the chamber can cause a pressure differential between the middle ear and the external environment. Patients must equalize the pressure in their ears, often by swallowing or yawning, to prevent discomfort or damage to the eardrum. Failure to equalize can lead to pain, fluid buildup, or even rupture.

Question 6: Why must fire safety be emphasized in HBOT?

To protect against water leaks.
Because oxygen is a fire accelerant (Correct answer)
To improve chamber aesthetics.
To maintain patient privacy.

Correct answer: Because oxygen is a fire accelerant

Fire safety is paramount in HBOT environments because the high concentration of oxygen within the chamber significantly increases the flammability of materials. Oxygen acts as a powerful accelerant, making even normally non-flammable substances combustible and causing fires to spread rapidly and intensely. Strict protocols are necessary to prevent ignition sources and manage potential fire hazards, ensuring patient and staff safety.

Question 7: Which professional is responsible for operating HBOT equipment?

Respiratory therapist.
Radiologic technologist.
Certified Hyperbaric Technician (Correct answer)
Occupational therapist.

Correct answer: Certified Hyperbaric Technician

A Certified Hyperbaric Technician (CHT) is specifically trained and certified to operate hyperbaric oxygen therapy equipment and manage patient care within the hyperbaric environment. Their expertise ensures the safe and effective delivery of HBOT, including monitoring patients, maintaining equipment, and responding to emergencies. While other medical professionals may be involved in patient care, the CHT is the primary operator responsible for the equipment.

Question 8: How does HBOT support wound healing?

By causing inflammation.
By decreasing collagen production.
By reducing oxygen to the tissue.
By increasing tissue oxygenation and supporting angiogenesis (Correct answer)

Correct answer: By increasing tissue oxygenation and supporting angiogenesis

HBOT significantly aids wound healing by dramatically increasing the oxygen supply to compromised tissues, which is vital for cellular metabolism and repair. This elevated oxygen promotes fibroblast activity, collagen synthesis, and the formation of new blood vessels (angiogenesis), all essential processes for closing wounds and restoring tissue integrity. It also enhances the body's ability to fight infection, accelerating the healing process.

Question 9: What precaution should be taken with diabetic patients in HBOT?

Discontinue insulin.
Ignore sugar levels.
Monitor blood glucose regularly (Correct answer)
Limit oxygen intake.

Correct answer: Monitor blood glucose regularly

Diabetic patients undergoing HBOT require careful monitoring of their blood glucose levels because hyperbaric oxygen can sometimes cause a temporary drop in blood sugar. Hypoglycemia can be dangerous, especially in a hyperbaric environment where symptoms might be masked or difficult to manage. Regular monitoring ensures patient safety and allows for prompt intervention if glucose levels become too low.

CHT Hyperbaric Medicine Fundamentals 1

What is the primary function of hyperbaric oxygen therapy (HBOT)?