Certified Hyperbaric Technologist Test CHT Hyperbaric Medicine and Indications 2

Question 1

Which gas law explains the mechanical reduction in bubble volume that occurs during hyperbaric oxygen therapy for arterial gas embolism?

Accepted Answer

Boyle's law

Answer

Henry's law

Answer

Dalton's law

Answer

Charles's law

Question 2

Carbon monoxide poisoning is an approved HBO indication primarily because increased pressure does what?

Accepted Answer

Dissolves more oxygen in plasma and speeds COHb dissociation

Answer

Directly binds and neutralizes carbon monoxide

Answer

Lowers the patient's core body temperature

Answer

Increases hemoglobin production in bone marrow

Question 3

Which of the following is an UHMS-approved indication for hyperbaric oxygen therapy?

Accepted Answer

Crush injury and acute traumatic ischemia

Answer

Chronic fatigue syndrome

Answer

Autism spectrum disorder

Answer

Generalized anxiety disorder

Question 4

In treating decompression sickness, the U.S. Navy Treatment Table 6 is most commonly initiated at what pressure?

Accepted Answer

2.8 ATA (60 fsw)

Answer

1.5 ATA (16 fsw)

Answer

6.0 ATA (165 fsw)

Answer

1.0 ATA (surface)

Question 5

Why is hyperbaric oxygen beneficial in clostridial myonecrosis (gas gangrene)?

Accepted Answer

High oxygen tension inhibits alpha-toxin and anaerobic bacterial growth

Answer

It lowers the patient's white blood cell count

Answer

It directly debrides necrotic tissue

Answer

It raises the patient's blood glucose to feed tissue

Question 6

HBO promotes healing of chronic diabetic foot wounds largely by stimulating which process?

Accepted Answer

Angiogenesis and fibroblast collagen synthesis

Answer

Immediate bone regeneration

Answer

Permanent vasoconstriction

Answer

Suppression of all immune activity

Question 7

Delayed radiation tissue injury such as osteoradionecrosis responds to HBO mainly because the therapy does what?

Accepted Answer

Induces neovascularization in hypoxic irradiated tissue

Answer

Reverses the patient's original malignancy

Answer

Removes residual radioactive material

Answer

Eliminates the need for surgical reconstruction