CHT Hyperbaric Medicine Fundamentals 4

Question 1

At sea level (1 ATA), a rigid container holds 10 L of gas. If pressure is increased to 3 ATA, what is the new volume (Boyle's Law)?

Accepted Answer

3.3 L

Answer

30 L

Answer

13 L

Answer

1 L

Question 2

Which wound type has the strongest FDA-cleared and clinical evidence supporting adjunctive HBO therapy?

Accepted Answer

Wagner grade 3-4 diabetic foot ulcers

Answer

Venous stasis ulcers

Answer

Pressure injuries (stage II)

Answer

Acute surgical incisions

Question 3

Which gas law is most directly applied when calculating the total pressure of a gas mixture in a hyperbaric chamber?

Accepted Answer

Dalton's Law of Partial Pressures

Answer

Boyle's Law

Answer

Charles's Law

Answer

Graham's Law

Question 4

A patient reports ear pain and inability to equalize during chamber compression. The correct technician response is to:

Accepted Answer

Halt compression, allow slight decompression, and coach equalization techniques

Answer

Continue compression at a faster rate to push through the discomfort

Answer

Administer supplemental oxygen and proceed

Answer

Abort the treatment immediately and decompress fully

Question 5

Which biochemical mechanism explains HBO's role in enhancing leukocyte killing of bacteria in hypoxic tissues?

Accepted Answer

HBO restores the oxygen-dependent oxidative burst of neutrophils

Answer

HBO increases serum immunoglobulin levels

Answer

HBO raises tissue temperature to denature bacterial proteins

Answer

HBO acidifies the wound environment to inhibit bacterial growth

Question 6

What is the typical treatment pressure (ATA) used for most wound-healing and adjunctive HBO indications?

Accepted Answer

2.0–2.4 ATA

Answer

1.5 ATA

Answer

3.0 ATA

Answer

4.0 ATA

Question 7

Which condition describes gas bubbles forming in venous blood from nitrogen supersaturation after rapid ascent?

Accepted Answer

Type I decompression sickness

Answer

Arterial gas embolism (AGE)

Answer

Pulmonary barotrauma

Answer

Nitrogen narcosis