CHT Hyperbaric Medicine Fundamentals 3

Question 1

According to Charles's Law, if a gas is heated at constant pressure, its volume will:

Accepted Answer

Increase proportionally

Answer

Charles's Law states volume is directly proportional to absolute temperature at constant pressure (V ∝ T).

Question 2

Which condition is an ABSOLUTE contraindication to hyperbaric oxygen therapy?

Accepted Answer

Untreated pneumothorax

Answer

An untreated pneumothorax can tension under pressure and is the only universally accepted absolute contraindication to HBO.

Question 3

The US Navy Treatment Table 6 is the standard protocol for which condition?

Accepted Answer

Arterial gas embolism

Answer

USN Table 6 reaches 2.8 ATA and is the primary treatment for arterial gas embolism and serious decompression sickness.

Question 4

What is the primary role of a 'air break' during an HBO session?

Accepted Answer

Reduce pulmonary and CNS oxygen toxicity risk

Answer

Air breaks (5 min of air breathing) lower cumulative oxygen dose and reduce the risk of both CNS and pulmonary O2 toxicity.

Question 5

A monoplace hyperbaric chamber is pressurized with which gas?

Accepted Answer

100% oxygen

Answer

Monoplace chambers are pressurized with 100% oxygen, so the patient breathes the ambient chamber gas directly.

(CHT) Certified Hyperbaric Technician Practice Test