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20 Cards in this Set

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Alveolar Minute Ventilation

VA=(VT-VD) x f

VD/VT Ratio



PaCO2 - PECO2


______________ x 100


PaCO2


Norm: 20-40% (up to 60% vent pt)

Paco Peco Paco

Deadspace Ventilation

VD


___ X VT


VT


PAO2

PAO2= (7xFiO2) - (PaCO2+10)

RQ

PaCO2


_______


0.8

P(A-a)O2 or (A-a)DO2


A-a Gradient

PAO2 - PaO2



(A-a) Gradient Table

On 100% FiO2




25-65 Normal


66-300 V/Q mismatch (Give O2)


>300 Shunt (Give O2 & PEEP)

CaO2

(Hgb x 1.34 x SaO2)




Normal: 17-20 vol%

CvO2

(Hgb x 1.34 x SvO2)




Normal: 12-16 vol%

C(a-v)O2

Shortcut: (SaO2-SvO2) x 0.2




Normal: 4-5%

QS/QT

(A-a) (.003)


_______________


(A-a) (.003) + C(a-v)O2


OR


For every 100 of (A-a) X 5 then +5


Normal: 3-5%

SVR

(MAP - CVP)


____________


CO


Normal: <20mm Hg/L/min


(1600 Dynes/sec/cm-5)

How do you convert Hg/L/min to Dynes/sec/cm-5?

Multiply by 80

PVR

(MPAP - PCWP)


________________


CO


Normal: <2.5 mm Hg/L/Min


(200 Dynes/sec/cm-5)

ETT

(Wt in kg)


__________


10


Male: 7.5-8.5


Female: 6.5-8.0

Sx catheter

ID


____ X 3


2

CPP

MAP - ICP

Corrected VT

Set VT - Compressible Volume

Compressible Volume

(PIP - PEEP) X Tubing Compliance

Static Compliance

Exhaled VT


________________


Plateau - PEEP