FREE CHT Hyperbaric Physics and Gas Laws Questions and Answers
Which gas law explains why a gas's volume decreases as pressure increases?
Boyle’s Law states that the volume of a gas is inversely proportional to its pressure at constant temperature.
Which law is most directly associated with oxygen toxicity under pressure?
Henry’s Law explains how the amount of gas dissolved in a liquid increases with pressure, which is key in understanding oxygen toxicity at depth.
What happens to gas volume when a patient ascends rapidly from depth?
Rapid ascent reduces external pressure, causing gas volumes to expand, potentially resulting in barotrauma or embolism.
Which gas law supports the need to monitor partial pressures of oxygen during therapy?
Dalton’s Law states that total pressure of a gas mixture equals the sum of the partial pressures, crucial for calculating oxygen exposure.
What is the typical pressure used in hyperbaric oxygen therapy?
Hyperbaric oxygen therapy is commonly administered at 2.0 to 2.5 ATA (atmospheres absolute), enhancing oxygen delivery to tissues.
Why must temperature be controlled in a hyperbaric chamber?
Temperature affects gas behavior; Charles’s Law states that gas volume is directly proportional to temperature at constant pressure.