CHT Hyperbaric Medicine Fundamentals

Question 1

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

Accepted Answer

Enhance tissue oxygenation and healing

Answer

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?

Accepted Answer

Henry’s Law

Answer

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?

Accepted Answer

Carbon monoxide poisoning

Answer

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?

Accepted Answer

2.5 ATA

Answer

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?

Accepted Answer

Middle ear barotrauma

Answer

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.

(CHT) Certified Hyperbaric Technician Practice Test

(CHT) Certified Hyperbaric Technician Practice Test

CHT Hyperbaric Medicine Fundamentals