Equations Flashcards
What is the alveolar gas equation?
PAO2 = PIO2 – (PaCO2 * 1.2)
What is the equation for air inspired when breathing at KU?
PIO2 = (PB-47)*0.21 = 147 mm Hg
What is the equation for total blood O2 content?
Hb *1.34 * % saturation + (0.003*PO2)
What is the equation for Dead Space/Tidal volume?
(PaCO2 – PECO2) / PaCO2
What is the equation for compliance?
∆ Lung volume /∆PTP
What is the equation for airway resistance?
(PB - PALV) / airflow
What is the equation for O2 saturation of Hb (%)?
O2 saturation of Hb (%) = [(HbO2,ml/dl / (Hb, g/dl * 1.34 ml/g)] x 100
What is the equation for blood O2 content?
Blood [O2] content, ml/dl = [0.003 ml/(mmHg x dl) x PO2 (mmHg)] + [Hb] g/dl x 1.34 ml/g x % O2 sat]
Calculate and insert the remaining values
What is the equation for VO2?
VO2 = Q * C(a-v) O2
Q, cardiac output
C (a-v) O2, difference in arterial and venous O2 content
What is the equation for oxygen extraction ratio (O2ER)?
O2ER- C (a-v) O2/ CaO2
What is the equation for the pressure produced by a single gas?
Find the partial pressures of gases a and b given that the Ptotal is 100 mm Hg; a, n=6 and b, n=14.
What is the equation for the diffusion of a substance across a membrane?
What is the equation for difussion capacity?
