Certified Hyperbaric Technologist Test Hyperbaric Wound Healing 2

Question 1

Which physiologic mechanism most directly explains how HBO2 therapy improves healing in a hypoxic wound?

Accepted Answer

Increased dissolved oxygen in plasma driving diffusion into ischemic tissue

Answer

HBO2 dramatically raises plasma-dissolved oxygen, steepening the diffusion gradient into hypoxic tissue.

Question 2

A diabetic foot ulcer classified as Wagner grade 3 with osteomyelitis is generally considered:

Accepted Answer

An approved indication for adjunctive HBO2 therapy

Answer

Wagner grade 3 or higher diabetic foot ulcers are recognized indications for adjunctive HBO2.

Question 3

Hyperoxia during HBO2 promotes wound healing partly by stimulating which process essential for new tissue?

Accepted Answer

Angiogenesis and fibroblast collagen synthesis

Answer

Elevated oxygen tension drives angiogenesis and supports collagen production by fibroblasts.

Question 4

Which assessment best predicts whether a wound is likely to respond to HBO2 therapy?

Accepted Answer

Transcutaneous oximetry (TcPO2) measurements

Answer

TcPO2 measurements, especially in-chamber, help predict tissue oxygenation response.

Question 5

Why does HBO2 enhance leukocyte killing of bacteria in an infected wound?

Accepted Answer

Oxygen-dependent respiratory burst requires adequate tissue O2

Answer

Neutrophil oxidative (respiratory) burst killing is oxygen-dependent and restored by raising tissue O2.

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