Anesthesia Machine

Question 1

cutoff for bain vs circle

Answer 1

smaller than 10kg, use bain, more than 10kg, use circle

Question 2

you are doing a dental on a 5kg kitty. When you check how full your oxygen tank is, it reads 1375psi. How many minutes do you have?

Answer 2

we will use bain, so 150-200ml/kg/min.
150 x 5= 750, 200 x 5=1000

750-1000ml/min, or 0.75 to 1L per min

1375/2000=0.68 x 660L = 454L

454L/0.75= 605 minutes
454L/1= 454 minutes

454-605 minutes

Question 3

flow rates for bain vs circle?

Answer 3

bain: 150-200ml/kg/min

circle: first 15 minutes 100ml/kg/min, then reduce to 50ml/kg/min

Question 4

how many litres in a full oxygen tank

Answer 4

660L

Question 5

you are doing a gastropexy on a large mixed breed dog around 30kg. The oxygen pressure is reading 1500psi. How many minutes do you have left?

Answer 5

circle: 100ml/kg/min for first 10 mins, then 50ml/kg/min

100 ml/kg/min x 30 kg= 3000ml or 3 L
50ml/kg/min x 30 kg= 1500ml or 1.5L

1500/2000= 0.75 x 660 L = 495L left

will be on 3L/min for 10 mins 3 x10 is 30L in the first 10 minutes. 495-30L = 465 L left after the first 10 minutes

465 L/ 1.5 L per min = 310 minutes