Hyperbaric Physics Fundamentals Flashcards
7 cards from real Certified Hyperbaric Technologist Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Hyperbaric Physics Fundamentals flashcards as text
Henry's Law describes which physical phenomenon relevant to hyperbaric therapy?
Answer: Amount of gas dissolved in a liquid is proportional to its partial pressure
Henry's Law states the quantity of gas dissolving in a liquid is proportional to its partial pressure.
Increased dissolved oxygen in plasma during HBOT is best explained by which law?
Answer: Henry's Law
Henry's Law explains greater oxygen partial pressure dissolves more oxygen directly into plasma.
Dalton's Law of partial pressures states that the total pressure of a gas mixture equals what?
Answer: The sum of the partial pressures of each gas
Dalton's Law states total pressure equals the sum of each component gas's partial pressure.
In air (21% oxygen) at 3 ATA, what is the approximate partial pressure of oxygen?
Answer: 0.63 ATA
Partial pressure equals fraction times total pressure: 0.21 multiplied by 3 ATA equals 0.63 ATA.
Why does the risk of oxygen toxicity increase as treatment pressure rises?
Answer: The partial pressure of oxygen increases per Dalton's Law
Higher total pressure raises oxygen's partial pressure, increasing toxicity risk.
When a diver breathes compressed air at depth, which gas primarily dissolves into body tissues and causes decompression sickness risk?
Answer: Nitrogen
Inert nitrogen dissolves into tissues under pressure and forms bubbles if ascent is too rapid.
What is the partial pressure of oxygen when breathing 100% oxygen at 2.4 ATA?
Answer: 2.4 ATA
With 100% oxygen the partial pressure equals the total pressure, so it is 2.4 ATA.
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