Certified Hyperbaric Technologist Test CHT Hyperbaric Medicine and Indications 4

Question 1

Dalton's law of partial pressures is most relevant to hyperbaric medicine because it explains:

Accepted Answer

How each gas in a mixture contributes its own partial pressure

Answer

Dalton's law states the total pressure of a gas mixture equals the sum of each gas's partial pressure, key to dosing oxygen.

Question 2

Henry's law is the principle behind which therapeutic effect of HBO?

Accepted Answer

Increased oxygen dissolved directly into the blood plasma

Answer

Henry's law states gas dissolved in a liquid is proportional to its partial pressure, allowing far more oxygen to dissolve in plasma under HBO.

Question 3

At 3 ATA breathing 100% oxygen, dissolved plasma oxygen rises enough to meet resting tissue needs even without hemoglobin. This principle supports treating:

Accepted Answer

Severe anemia where blood transfusion is not possible

Answer

HBO can supply tissue oxygen demands via dissolved plasma oxygen, a recognized indication for exceptional blood-loss anemia.

Question 4

The standard HBO treatment pressure for most chronic wound and radiation injury protocols is approximately:

Accepted Answer

2.0 to 2.5 ATA

Answer

Most routine wound-healing and radiation-injury protocols use 2.0 to 2.5 ATA for 90 to 120 minutes.

Question 5

Air breaks (periods of breathing room air) are scheduled during HBO sessions primarily to:

Accepted Answer

Reduce the risk of oxygen toxicity

Answer

Intermittent air breaks lower cumulative oxygen exposure, reducing the risk of CNS and pulmonary oxygen toxicity.

Certified Hyperbaric Technologist Test Practice Test

Certified Hyperbaric Technologist Test Practice Test

Certified Hyperbaric Technologist Test CHT Hyperbaric Medicine and Indications 4