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LUNG COMPLIANCE

Plat-Peep / Vt

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ADJUST CO2

Currant Rate * Currant PaCo2 / Desired PaCo2

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DESIRED VE

Currant PaCo2 * VE / Desired PaCo2

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DESIRED VENT RATE

Desired Vent Rate * Currant Vent Rate / VE

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ALVEOLAR MINUTE VENTILATION

(Vt- VD) RR

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MINUTE VENTILATION

Vt * RR / 1000

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VENT TUBING CALCULATION

Volume / Pressure

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ALVEOLAR AIR EQUATION

Fio2(Bp-47) - (Paco2 * CF)

Bp= 760

CF= 1.25 for and

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V/Q SHUNT

Aa gradient / 20

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IDEAL BODY WEIGHT

MALE: 50kg for first 60" then add 2.3kg/inch over

BABE: 45kg for first 60" then add 2.3 kg/imch over

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TO CHANGE PH IMMEDIATLY, WHAT LEVEL DP YOU CHANGE PaCO2

Desired PH-Currant PH then divide answer by .008

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VENT SETTING FOR VE

Middle of Vt * Vent Rate

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CYCLE TIME

Divide Cylce time into 60 to get Rate

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E CYLINDER

E Cylinder= 2200psi

Psi * .28 / Liters / Minute

Remember there is the safety of 500psi to subtract from the 2200

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DEAD SPACE (VD)

PaCo2-PeCo2 / PaCo2

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ARTERIAL OXYGEN CONTENT

(Sao2 ** Hb ** 1.34) + (Po2 * 0.003ml)

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RAW

PIP-Plat/ Flow Rate, Then take Flow rate and divide into 60.

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VT CORRECTION FOR UNCOMPENSATED VENT

VT - ( TF * [pip - peep]

TF= 3

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WEIGHT TO KG

wt / 2.2 ** 8 ** 12

8 and 12 are NBRC Guidelines

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KG TO POUNDS

multiply by 2.2

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POUNDS TO KG

Divide by 2.2

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FiO2

Air L/minute

O2L/minute

RA= .21 medical air= .21

(step one) Multiply .21 by Air L/m then add O2 L/m to that. (step 2) Add the original Air and O2 together. Take that anwer and divide it in to the Multiplied answer that was first done (step one)

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LIQUID O2

(cylinder full - cylinder empty)* 860L/KG

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LIQUID WEIGHT OF O2

344 is the constant

Multiply the constant by the weight then divide by the liter flow. Take that answer and divide by 60 to get liters/hours

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INSPIRATORY TIME

60 seconds in one minute = the constant

1. Rate divided by 60

2. Add I:E Ratio together (1:3= 1+3=4)

3. Divide the answers together to get inspiratory time

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EXPIRATORY TIME

Take E time from the I:E Ratio and multiply it by the inspiratory time

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