Vaporizers

 

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Vaporizers

photo: Richard Struthers, The Anesthesia Machine, http://www.anes.med.umich.edu/machine/

 

Fig. 1: Variable Bypass Vaporizer

 

Fig 2: Measured Flow Vaporizer (e.g. Copper Kettle  (Foregger, Puritan-Bennett), Verni-Trol (Ohmeda))

 

 

Table 1:  30Saturated Vapor Pressures (SVP) 20oC
halothane (Fluothane) 243 mm Hg (volume % at 1 atm) 

32% (243/760)

isoflurane (Forane) 238 mm Hg 31%
enflurane (Ethrane) 172 mm Hg 23%
sevoflurane (Sevorane, Ultane) 160 mm Hg 21%

Gaseous Equation of State Calculator (courtesy of Dr. Fred Senese, General Chemistry OnLine : http://antoine.fsu.umd.edu/chem/senese/101/gases/)

Dependent
Variable
UnitsIdeal Gasvan der
Waals Gas
Dieterici
Gas
Pressure
Volume
Temperature
Moles mol

Gas van der Waals
Parameters
Dieterici
Parameters
PC (atm) a (SI units)
VC (L/mol) b (SI units)
TC (K) TBoyle/TC
ZC (K) ZC (calc)
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Citations