respiratory math

30 terms by Fweeks

Create a new folder

Advertisement Upgrade to remove ads

LUNG COMPLIANCE

Plat-Peep / Vt

ADJUST CO2

Currant Rate * Currant PaCo2 / Desired PaCo2

DESIRED VE

Currant PaCo2 * VE / Desired PaCo2

DESIRED VENT RATE

Desired Vent Rate * Currant Vent Rate / VE

ALVEOLAR MINUTE VENTILATION

(Vt- VD) RR

MINUTE VENTILATION

Vt * RR / 1000

VENT TUBING CALCULATION

Volume / Pressure

PF RATIO

PaO2 / Fio2

ALVEOLAR AIR EQUATION

Fio2(Bp-47) - (Paco2 * CF)
Bp= 760
CF= 1.25 for and

AA GRADIENT

PAo2-Pa02

V/Q SHUNT

Aa gradient / 20

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

TO CHANGE PH IMMEDIATLY, WHAT LEVEL DP YOU CHANGE PaCO2

Desired PH-Currant PH then divide answer by .008

VENT SETTING FOR VE

Middle of Vt * Vent Rate

CYCLE TIME

Divide Cylce time into 60 to get Rate

E CYLINDER

E Cylinder= 2200psi
Psi * .28 / Liters / Minute
Remember there is the safety of 500psi to subtract from the 2200

DEAD SPACE (VD)

PaCo2-PeCo2 / PaCo2

ARTERIAL OXYGEN CONTENT

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

RAW

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

VT CORRECTION FOR UNCOMPENSATED VENT

VT - ( TF * [pip - peep]
TF= 3

WEIGHT TO KG

wt / 2.2 8 12
8 and 12 are NBRC Guidelines

KG TO POUNDS

multiply by 2.2

POUNDS TO KG

Divide by 2.2

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)

LIQUID O2

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

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

GAS

Done in minutes

Liquid

done in hours

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

EXPIRATORY TIME

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

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set