Acheron I/M notes

Question 1

VP of Sevo

Answer 1

170

Question 2

VP of Iso

Answer 2

240

Question 3

VP of Halo

Answer 3

244

Question 4

VP of Enflu

Answer 4

172

Question 5

VP of Des

Answer 5

669

Question 6

Laminar flow is affected most by

Answer 6

viscosity

Question 7

Turbulent flow is affected most by

Answer 7

density

Question 8

Fick’s law of Diffusion is directly proportional to

Answer 8

partial pressure gradient
membrane area
solubility of gas

Question 9

Fick’s law of Diffusion is inversely proportional to

Answer 9

membrane thickness

Question 10

Flow through vaporizing chamber or splitting ratio equation

Answer 10

Flow through vaporizer= TFGF x [(Dial setting/100)]/(Sat VP/Atmp)]

Question 11

How many minutes left in a tank calculation

Answer 11

time remaining = remaining pressure/ 200 x flow rate

remember it’s expressed as “hour” so convert to mins

Question 12

Fluid maintenance rate equation

Answer 12

40 + kg (if pt > 20 kg)

Question 13

O2 flush valve pressure & flow

Answer 13

50 psig at 35-75 L/min

Question 14

Required dial setting equation for change in atmospheric pressure

Answer 14

Req. dial setting=
Normal x (atm/ambient)

Question 15

DISS & PISS mnemonic

Answer 15

DISS on the wall PISS on the floor

Question 16

CaO2

Answer 16

CaO2= (1.31xHbxSaO2) + (PaO2 x 0.003)

Question 17

Estimate PaO2 when not given

Answer 17

FiO2 x 5

Question 18

Full air tank volume and pressure

Answer 18

660L & 2200 psi

Question 19

Full N2O tank volume and pressure

Answer 19

1590L & 745 psi

Question 20

Full Oxygen volume and pressure

Answer 20

660L & 220 psi

Question 21

A TOF of 4/4 w/ no fade can still have _% blocked receptors

Answer 21

70%

Question 22

How much nitrous left in a tank

Answer 22

(psi/745) x 400

remember the pressure gauge of nitrous doesn’t drop until there is 1/4 nitrous left in the tank

Question 23

What percent of receptors can still be blocked with a 5 second head lift and ability to grip hand

Answer 23

50%

Question 24

The pressure regulator on the 02 cylinder reduces cylinder pressure to what before it enters anesthesia machine?

Answer 24

45-47

Question 25

Desiccated CO2 absorbers can produce what toxic gas

Answer 25

Carbon monoxide

Question 26

Allowable current leakage in the operating room

Answer 26

less than 10 microamps

Question 27

What nerve is best to assess intubating conditions when using a non-depolarizing MR

Answer 27

Orbicularis Oris

Question 28

What nerve is best to assess intubating conditions when using a depolarizing MR

Answer 28

adductor pollicis

Question 29

Frequency of TOF stimulation

Answer 29

2 Hz

Question 30

Ascending bellows add how much peep?

Answer 30

3 cmH2O

Question 31

Average adult VO2

Answer 31

250 mL/min

Question 32

What nerve is best to assess sufficient recovery of airway reflexes after non-depolarizer MR

Answer 32

adductor pollicis