Certified Hyperbaric Technologist Test Hyperbaric Wound Healing 3

Question 1

Delayed radiation injury (soft tissue radionecrosis) responds to HBO2 primarily because the therapy:

Accepted Answer

Induces neovascularization in irradiated, hypovascular tissue

Answer

Destroys residual tumor cells

Answer

Reverses the original radiation dose

Answer

Eliminates the need for surgical debridement

Question 2

The Marx protocol for osteoradionecrosis classically combines HBO2 with:

Accepted Answer

Staged surgical management based on treatment response

Answer

Lifelong oral oxygen tablets

Answer

A single dive only

Answer

Avoidance of all surgery

Question 3

Compromised skin grafts and flaps benefit from HBO2 because oxygen:

Accepted Answer

Supports marginally perfused tissue and reduces ischemia-reperfusion injury

Answer

Glues the graft to the wound bed

Answer

Replaces the need for vascular supply entirely

Answer

Prevents all infection without antibiotics

Question 4

Which laboratory or bedside finding suggests a chronic wound is hypoxic and may need HBO2 evaluation?

Accepted Answer

Persistently low periwound TcPO2 that rises with oxygen challenge

Answer

Elevated serum sodium

Answer

Normal capillary refill

Answer

High platelet count alone

Question 5

For a patient on the chemotherapy drug doxorubicin, the technologist should be aware that HBO2 may:

Accepted Answer

Potentiate the drug's cytotoxic and cardiotoxic effects

Answer

Completely neutralize the drug

Answer

Have no documented interaction concern

Answer

Convert it into a wound dressing

Question 6

In a chronic refractory wound, HBO2 is best described as:

Accepted Answer

Adjunctive therapy combined with standard wound care

Answer

A standalone cure replacing debridement and offloading

Answer

A purely diagnostic procedure

Answer

Effective only for acute trauma

Question 7

Repeated daily HBO2 sessions improve wound bed quality largely by establishing:

Accepted Answer

A durable oxygen gradient that drives fibroblast and capillary growth over weeks

Answer

Instant complete closure after one dive

Answer

Permanent saturation that never declines

Answer

A bacterial biofilm protective layer