Principles: Exam I Flashcards
Sevoflurane
Vapor Pressure
170mmHg
Enflurane
Vapor Pressure
175mmHg
Isoflurane
Vapor Pressure
239mmHg
Halothane
Vapor Pressure
243mmHg
Desflurane
Vapor Pressure
669mmHg
Estimation of PaO2
Multiply FiO2 x5
(i.e. FiO2 40% x 5 = PaO2 200mmHg
Estimation of PAO2
Multiply FiO2 x6
(i.e. FiO2 40% x 6 = PAO2 240mmHg
PAO2-PaO2 Gradient
PAO2 - PaO2 = Gradient
Should equal the FiO2 - if not V/Q Mismatch
Calculating Dissolved O2 in Blood
Multiply the partial pressure of O2 by 0.003
i.e. PaO2 300mmHg x 0.003 = 0.9mL O2/100mL
Calculating Dissolved CO2 in Blood
Multiply the partial pressure of CO2 by 0.067
i.e. PaCo2 50mmHg x 0.067 = 3.35mL CO2 / 100mL
Reynolds <1,000
Laminar Flow
Reynolds >1,500-2,000
Turbulent Flow
Reynolds 2,100
Turbulent Flow
Reynolds <100
Turbulent Flow
Reynolds 101 to 1,000
Laminar Flow