CHT Hyperbaric Medicine and Indications 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 CHT Hyperbaric Medicine and Indications flashcards as text
Which gas law explains the mechanical reduction in bubble volume that occurs during hyperbaric oxygen therapy for arterial gas embolism?
Answer: Boyle's law
Boyle's law states that gas volume is inversely proportional to pressure, so increasing chamber pressure shrinks intravascular bubbles.
Carbon monoxide poisoning is an approved HBO indication primarily because increased pressure does what?
Answer: Dissolves more oxygen in plasma and speeds COHb dissociation
HBO raises dissolved plasma oxygen and accelerates the displacement of carbon monoxide from hemoglobin.
Which of the following is an UHMS-approved indication for hyperbaric oxygen therapy?
Answer: Crush injury and acute traumatic ischemia
Crush injury and acute traumatic ischemia is an established UHMS-approved indication for adjunctive HBO.
In treating decompression sickness, the U.S. Navy Treatment Table 6 is most commonly initiated at what pressure?
Answer: 2.8 ATA (60 fsw)
Treatment Table 6 begins at 2.8 ATA, equivalent to 60 feet of seawater, on 100% oxygen.
Why is hyperbaric oxygen beneficial in clostridial myonecrosis (gas gangrene)?
Answer: High oxygen tension inhibits alpha-toxin and anaerobic bacterial growth
Elevated tissue oxygen tension halts alpha-toxin production and suppresses growth of the anaerobic Clostridium organisms.
HBO promotes healing of chronic diabetic foot wounds largely by stimulating which process?
Answer: Angiogenesis and fibroblast collagen synthesis
Elevated oxygen tension drives angiogenesis and supports fibroblast collagen production needed for wound repair.
Delayed radiation tissue injury such as osteoradionecrosis responds to HBO mainly because the therapy does what?
Answer: Induces neovascularization in hypoxic irradiated tissue
HBO stimulates neovascularization in the hypocellular, hypovascular, hypoxic tissue characteristic of radiation injury.
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