Certified Hyperbaric Technologist Test Hyperbaric Physics Fundamentals 3

Question 1

Henry's Law describes which physical phenomenon relevant to hyperbaric therapy?

Accepted Answer

Amount of gas dissolved in a liquid is proportional to its partial pressure

Answer

Henry's Law states the quantity of gas dissolving in a liquid is proportional to its partial pressure.

Question 2

Increased dissolved oxygen in plasma during HBOT is best explained by which law?

Accepted Answer

Henry's Law

Answer

Henry's Law explains greater oxygen partial pressure dissolves more oxygen directly into plasma.

Question 3

Dalton's Law of partial pressures states that the total pressure of a gas mixture equals what?

Accepted Answer

The sum of the partial pressures of each gas

Answer

Dalton's Law states total pressure equals the sum of each component gas's partial pressure.

Question 4

In air (21% oxygen) at 3 ATA, what is the approximate partial pressure of oxygen?

Accepted Answer

0.63 ATA

Answer

Partial pressure equals fraction times total pressure: 0.21 multiplied by 3 ATA equals 0.63 ATA.

Question 5

Why does the risk of oxygen toxicity increase as treatment pressure rises?

Accepted Answer

The partial pressure of oxygen increases per Dalton's Law

Answer

Higher total pressure raises oxygen's partial pressure, increasing toxicity risk.

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