Machine Calculations

Question 1

Boyles Law

Answer 1

Temp constant

PV=T

Question 2

Charles Law

Answer 2

P is constant

PV=T

Question 3

Gay-Lussacs Law

Answer 3

Volume is constant

PV=T

Question 4

Compliance

Answer 4

change in volume/change in pressure

Question 5

I:E time

Answer 5

Inspiratory time + expiratory time= total time

Question 6

Inspiratory volume when vent doesn’t decouple (X)

Answer 6

I:E x FGF(mL)

Question 7

Volume added to MV d/t FGF (Y)

Answer 7

(I:E x FGF)XRR=Y

Question 8

Total MV when vent doesn’t compensate for FGF

Answer 8

[(I:E x FGF) x RR] + Set MV

Question 9

TV when Vent doesn’t compensate for compliance

Answer 9

TV-(PIPxcompliance)

Question 10

MV when Vent doesn’t compensate for FGF or compliance

Answer 10

MV+{TV+[(I:ExFGF)xRR]} - [TVx (PIPxcompliance)xRR]

Question 11

F to C

Answer 11

1.8C+32

Question 12

FiO2

Answer 12

(Total O2 concentration/total liter flow)-anesthetic gas

Question 13

service pressure O2

Answer 13

2000psi for 660L

Question 14

Service pressure for air

Answer 14

2000 psi for 625L

Question 15

Service pressure for N2O

Answer 15

745 psi for 1590L

Question 16

amount of time left for take to be exhausted (O2)

Answer 16

650/2000=x/current pressure

x/flow=minutes left

Question 17

Male ideal body weight

Answer 17

105lbs+6lbs for each inch >5ft

Question 18

Female ideal body weight

Answer 18

100lbs+5lbs for each inch >5ft

Question 19

SV

Answer 19

EDV-ESV