CCP CCP Temperature Management & Hypothermia

Question 1

What is the target nasopharyngeal temperature for deep hypothermic circulatory arrest (DHCA) in adults?

Accepted Answer

15-18°C

Answer

DHCA typically targets nasopharyngeal temperatures of 15-18°C to provide adequate cerebral protection during circulatory arrest.

Question 2

Which temperature monitoring site most accurately reflects brain temperature during CPB cooling?

Accepted Answer

Nasopharyngeal

Answer

Nasopharyngeal temperature closely approximates brain temperature during CPB due to its proximity to the internal carotid artery.

Question 3

What is the maximum safe rate of rewarming on CPB to avoid cerebral hyperthermia?

Accepted Answer

0.5°C per minute

Answer

Rewarming should not exceed 0.5°C per minute to prevent cerebral hyperthermia and associated neurological injury.

Question 4

During hypothermic CPB, what happens to whole-body oxygen consumption (VO2)?

Accepted Answer

Decreases approximately 50% for every 10°C drop

Answer

VO2 decreases roughly 50% for every 10°C reduction in temperature, following the Q10 metabolic effect.

Question 5

Moderate hypothermia during CPB is defined as which core temperature range?

Accepted Answer

28-32°C

Answer

Moderate hypothermia is defined as core temperatures between 28-32°C during cardiopulmonary bypass.

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