CCP CCP Temperature Management & Hypothermia 2

Question 1

What is the primary advantage of alpha-stat blood gas management during hypothermic CPB?

Accepted Answer

Preserves cerebrovascular autoregulation and enzyme function

Answer

Maintains pH at 7.40 regardless of temperature

Answer

Increases cerebral blood flow by adding CO2

Answer

Prevents hemodilution

Question 2

pH-stat blood gas management during hypothermia results in which primary cerebral effect?

Accepted Answer

Increased cerebral blood flow due to elevated CO2

Answer

Reduced cerebral blood flow

Answer

Normal cerebrovascular autoregulation

Answer

Decreased cerebral oxygen delivery

Question 3

Which pH management strategy is preferred for neonates and infants undergoing DHCA?

Accepted Answer

pH-stat

Answer

Alpha-stat

Answer

Neither; normothermia is used

Answer

Both are equally effective

Question 4

The 'afterdrop' phenomenon after CPB rewarming refers to:

Accepted Answer

Continued fall in core temperature after rewarming is stopped

Answer

A drop in pump flow after separation from bypass

Answer

Sudden hypotension immediately post-bypass

Answer

Reduction in hemoglobin after transfusion

Question 5

During normothermic CPB, what core temperature range is targeted?

Accepted Answer

35-37°C

Answer

32-34°C

Answer

28-30°C

Answer

38-40°C

Question 6

To prevent neurological injury, the arterial blood outflow temperature during rewarming should not exceed:

Accepted Answer

38°C

Answer

37°C

Answer

39°C

Answer

40°C