Certified Hyperbaric Technologist Test CHT Hyperbaric Contraindications and Complications

Question 1

Which condition is considered an absolute contraindication to hyperbaric oxygen therapy?

Accepted Answer

Untreated pneumothorax

Answer

Untreated pneumothorax is the only absolute contraindication to HBO therapy because pressurization can cause tension pneumothorax.

Question 2

Oxygen toxicity affecting the central nervous system (CNS) in the hyperbaric environment is also known as:

Accepted Answer

Paul Bert effect

Answer

The Paul Bert effect refers to CNS oxygen toxicity, characterized by seizures, while the Lorrain Smith effect refers to pulmonary oxygen toxicity.

Question 3

Which of the following is a sign of middle ear barotrauma in a hyperbaric patient?

Accepted Answer

Ear pain and hearing loss during compression

Answer

Middle ear barotrauma presents as ear pain and possible hearing loss during compression when the Eustachian tube fails to equalize pressure.

Question 4

What is the most common complication of hyperbaric oxygen therapy?

Accepted Answer

Middle ear barotrauma

Answer

Middle ear barotrauma is the most common complication of HBO therapy due to Eustachian tube dysfunction during pressurization.

Question 5

A patient on doxorubicin (Adriamycin) chemotherapy requires HBO. What is the primary concern?

Accepted Answer

Increased pulmonary oxygen toxicity risk

Answer

Doxorubicin combined with HBO significantly increases the risk of pulmonary oxygen toxicity and is a relative contraindication.

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