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RT forumulas!

the dreaded respiratory formulas that you never use except for exams.

QuestionAnswer
Pack years= # of packs/day x # of years smoked.
MAP= (2x diastolic pressure) + Systolic ________________________________ 3
Fic equation: Cardiac output/QT= V02 ___________________________________ C(a-v)o2 (10)
Cardiac output= QT HR x SV
Stroke volume = QT __________________________________ HR
SVR= (MAP-CVP) _____________________ x 80 QT
PVR= MPAP-PWP _____________________ x 80 QT
Ca02 (Hbg x 1.34 x Sa02) + (Pa02 x 0.003) Oxygen in RBC 02 in plasma
Cvo2= (Hbg x 1.34 x Svo2) + (Pvo2 x 0.003)
Vo2= QT x C(a-v)02 x 10
QS/QT cco2-Cao2 _____________________ cco2-cvo2
Desired Pao2 Current Fio2 x Desired Pao2 _______________________________ Current pao2
P/F ratio Pao2/fio2
Pediatric drug dosage ESD= wt (lbs) x normal adult dose _____________________________ 150
Amount of drug in mg. Drug% x 10 x mL= number of mg in 1mL of the drug.
Minute ventilation= Vt x F
Dynamic Compliance= Exhaled volume __________________________ peak insp pressure - peep
Static Compliance= Exhaled volume __________________________ Plateau pressure - peep
Raw= Peak pressure-Plateau pressure
IDBW for Males= 106lbs + 6lbs/inch over 5ft
IDBW for Females= 105 lbs + 5lbs/inch over 5ft
Calculating minimal flow rate= (Vt x rate) x ( I+E)
RSBI= RR/VT=
Duration of flow in tank gauge pressure (psi) x tank factor __________________________________ liter flow
Tank factor for E tank .28/ L psi (0.3)
Tank factor for H tank 3.14 L psi (3.0)
Total flow= factor of tank used x liter flow
Calculating patients max heart rate. 220- HR
calculating volume lost through chest tube Vt-Vte= Lost Vt
Created by: BeckyR73