CHS Patient Evaluation & Treatment Protocols 3

Question 1

When performing a pre-dive assessment, a patient reveals they took a sulfonylurea medication this morning without eating. What risk does this present during HBO therapy?

Accepted Answer

Hypoglycemia exacerbated by the metabolic effects of HBOT

Answer

Sulfonylureas lower blood glucose, and HBOT can further affect glucose metabolism, making hypoglycemia during treatment a significant safety concern.

Question 2

A patient with chronic carbon monoxide poisoning presents 36 hours after exposure. Which statement best describes the rationale for still offering HBOT?

Accepted Answer

Delayed HBO may still reduce the risk of delayed neurological sequelae

Answer

Even with delayed presentation, HBOT may reduce the incidence of delayed neurological syndrome by addressing CO bound to cytochrome oxidase and lipid peroxidation.

Question 3

During evaluation for radiation tissue injury, a patient reports the irradiated tissue TcPO2 is 8 mmHg on room air but rises to 95 mmHg during an HBO challenge. How should this be interpreted?

Accepted Answer

The tissue is hypoxic but has patent vasculature — HBO is likely to be beneficial

Answer

A dramatic rise to 95 mmHg during the HBO challenge confirms that the vasculature can respond to increased oxygen pressure, predicting a favorable treatment outcome.

Question 4

Which of the following contraindications to HBOT is considered ABSOLUTE rather than relative?

Accepted Answer

Untreated pneumothorax

Answer

An untreated pneumothorax is the only absolute contraindication to HBOT because pressurization can convert it into a life-threatening tension pneumothorax.

Question 5

A patient receiving HBOT for osteomyelitis has a serum glucose of 380 mg/dL prior to a scheduled session. What is the correct course of action?

Accepted Answer

Delay treatment until glucose is below 250 mg/dL and optimize glycemic control

Answer

Severe hyperglycemia impairs leukocyte function and wound healing; delaying treatment until glucose is better controlled maximizes therapeutic benefit and patient safety.

(CHS) Certified Hyperbaric Specialist Practice Test

(CHS) Certified Hyperbaric Specialist Practice Test

CHS Patient Evaluation & Treatment Protocols 3