Egar Video #7 Inhaled Anesthetics on Breathing, Airway, Ventilation

Question 1

How would you measure respiratory depression?

Answer 1

• Increasing levels of PCO2
• Increase in ventilation in response to increased PCO2

Question 2

What has very little effect on PaCO2

Answer 2

N2O

Question 3

Which inhaled anesthetics increase PaCO2?
Which has the highest effect?

Answer 3

• All potent inhaled anesthetics increase PaCO2
• Desflurane more than sevoflurane

Question 4

Which MAC = apnea

Answer 4

Apnea at 1.5 – 2 MAC
X intersection with line

Question 5

All inhaled anesthetics have which respiratory effects?

Answer 5

respiratory depression & bronchodilation

Question 6

Reason patients cough & gag in recovery despite no irritant qualities from anesthetic gas

Answer 6

As a response to a foreign body in airway

Question 7

The lower the solubility of a gas, the greater potential for ?

Answer 7

greater the potential for a problem when recovering from anesthesia

Question 8

What is hypoxic pulmonary vasocontraction

Answer 8

Body will shunt blood to the unaffected lung so there isn’t as much of a V/Q mismatch

Question 9

Anesthetics effect on HPV

Answer 9

Anesthetics minimally effect hypoxic pulmonary vasoconstriction

Question 10

Desflurane Respiratory Irritation is present at what MAC?

Answer 10

At 2 MAC of desflurane, you have evidence of respiratory irritation but less with isoflurane and none with sevoflurane

Question 11

Which Anesthetic causes the most coughing during maintenance with LMA

Answer 11

About the same.

Question 12

Risk of high solubility anesthetics and airway reflexes.

Answer 12

Higher solubility will “stick around” making the patient perceive something is in their airway