Physics, Monitoring, Anesthesia Delivery Devices

Question 0

How are the gases analyzed?

Answer 0

N2O, CO2, and halogenated use IR.

O2 and N2 use paramagnetic analyzer.

Question 1

PaO2 electrode is called?
PaCO2 ?
pH ?

Answer 1

PaO2 = Clark electrode
PaCO2 = Severinghaus electrode 
pH = Sanz electrode

Question 2

A dampened a line could be from:

Answer 2

Obstruction, air, kink, low pressure bag

Question 3

Resonance in an a line is caused by what? What parameters are changed?

Answer 3

Long tubing will cause.

Overestimates systolic, underestimates diastolic, but MAP is unchanged.

Question 4

Transducer height will alter systolic in what way?

Answer 4

1.36cm = 1 mmHg

So 7 cm will change pressure by 10mmHg

Question 5

How would an air bubble change your ABG values?

Answer 5

Air has about 160mmHg O2 and no CO2. So equilibrium would raise your PaO2 (unless already above 160) and lower your PaCO2

Question 6

Oxygen tank contains when full:

Answer 6

660L at 1900psi

Question 7

Full nitrous tank reads:

Answer 7

Psi of 745 and has 1590L. Psi won’t change until 75% gone.