Certified Hyperbaric Technologist Test Hyperbaric Chamber Operations 3

Question 1

Which of the following is an absolute contraindication to hyperbaric oxygen therapy?

Accepted Answer

Untreated pneumothorax

Answer

An untreated (tension) pneumothorax can expand dangerously with pressure changes and must be resolved first.

Question 2

What is the purpose of an 'air break' during a hyperbaric treatment?

Accepted Answer

To reduce the risk of oxygen toxicity

Answer

Periodic breathing of air lowers cumulative oxygen exposure, reducing CNS oxygen toxicity risk.

Question 3

Early signs of central nervous system oxygen toxicity may include:

Accepted Answer

Twitching, visual changes, or nausea

Answer

CNS oxygen toxicity can present with facial twitching, tunnel vision, nausea, and may progress to seizures.

Question 4

If a patient begins seizing inside the chamber on oxygen, the immediate action is to:

Accepted Answer

Switch the patient to breathing air and maintain depth until tonic-clonic activity stops

Answer

Removing the oxygen source by switching to air stops the toxicity, and rapid ascent during a seizure risks pulmonary barotrauma.

Question 5

Why are patients with claustrophobia a special consideration in monoplace chambers?

Accepted Answer

The enclosed acrylic tube can trigger anxiety requiring reassurance or sedation

Answer

The confined transparent chamber can provoke anxiety, managed with communication, distraction, or mild sedation.

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