Anesthesia Equipment and Physics

Question 1

What condition must be satisfied to calculate PPV?

Answer 1

Must be mechanically Ventilated, in NSR and have an Aline.

Question 2

When does a N2O tank drop below 750 psi?

How much volume is left?

Answer 2

When 3/4 has been used.

~400L

Question 3

How much desfluorane is in vapor form when using desfluorane vaporizer at 1500 psi?

Answer 3

44%

664/1500 = 44%

Question 4

How much N2O liquid is in a full tank?

Answer 4

1590L

Question 5

What does a fail safe or pressure sensor shutoff valve do and what PSI is required to keep it open?

Answer 5

Prevents hypoxic mixture when O2 < 30 psi.

Question 6

What pressure does the second Stage O2 pressure regulator deliver to the rotameters?

Answer 6

16 PSI

Question 7

If RA is found in the waste disposal system, in paralyzed intubated patient, what caused it to get there?

Answer 7

Negative-pressure relief valve.

Entrains room air if pressure in system becomes negative.