80 - 100 mmHg

P(A-a)O2

or

A-a gradient

> 300

(<200 ~ ARDS)

RAW

(airway resistance)

NIF/MIP

(normal)

NIF/MIP

(weaning limit)

RSBI

(wean success)

Glucose

(fasting)

Potassium

(K+)

Urea Nitrogen

(BUN)

Hemoglobin

(male)

Hemoglobin

(female)

Prothrombin time

(PT)

Cardiac Output

(CO or QT?)

Cardiac Index

(CI)

(P_B – P_H2O)FiO₂ - PaCO₂/ RQ       

 (RQ is typically 0.8, or multiply by 1.25)

P_B ~ 760,  P_H2O = 47 (unless other values given)

 CO2 Production

O2 Consumption

(?)

(Hb * 1.34)SO2 + PO2 * .003

(plug in appropriate values to get CA and CV)

(Normal CA = 20, Normal CV = 15)

  CC – CA   

  CC – CV

(for CC, calculate content w/ SO2 of 100% and calc P_AO2)

(shortcut - use CC as 100% and CA as SaO2 and CV as SvO2) ???

    Cardiac Output     

 Body Surface Area 

 (BSA from Dubois chart of Ht/Wt)

Deadspace fraction

VD/VT

(PaCO₂ – P_ECO₂ ) / PaCO₂  

 (P_ECO₂ is mixed, exhaled CO2, NOT end tidal CO2)

"(Paco - Peco) ÷ Paco"

106 + [ 6 x (height in inches – 60)]

(106 + 6 x inches over 5 ft)

105 + [ 5 x (height in inches – 60)]

(105 + 5 x inches over 5 ft)

PA mean - PCWP

         CO

BP mean - CVP

        CO

(2 x diastolic) + systolic

               3

CO =   O2 consumption   

          [ C(a-v)O2 x 10 ]

 Corrected Vt

  Plat - PEEP

 Corrected Vt

  PIP - PEEP

  PIP - Plat 

  Peak flow   x 60  = cm/L/sec

???