#### Equations block 3

pulse pressure=

systolic pressure-diastolic pressure

Mean Arterial Pressure(MAP)

(systolic pressure + 2(diastolic pressure))/3

Stroke volume (SV)

EDV-ESV

Cardiac Output (CO)

SV*HR

Cardiac Output (Fick Technique)

VO2/(CaO2-CvO2)

Ejection Fraction

SV/EDV or (EDV-ESV/EDV)

Flow (Q)

A*v

Resistance

deltaP/Q

Systemic Vascular Resistance

((MAP-RAP)/CO)*80

Pulmonary Vascular Resistance

((PApressure-LAP)/CO)*80

Wall Stress

T/h and (T=P*r)

Pressure of dry respiratory air Pz=

Fz*(Patm)

Transrespiratory Pressure (Ptr)=

P(A)-Patm

Transpulmonary Pressure (Pl)

P(A)-Ppl

Transairway Pressure (Pta)

Paw-Ppl

(P(ACO2)-P(ECO2)/P(ACO2))*V(T)

Alveolar Ventilation (VA L/min)=

(Vco2 (ml/min) * .863)/PAco2 (mmHg)

delta P

Pinside-Poutside

delta P

V(airflow)
R or Q
R

J (Fick's Law of Diffusion)

(D * A)/h

Pressure of wet air trachea (Pz)=

Fz * (Patm-Ph2o)

Delta P (bernouille eq simplified)

4v^2

Minute Ventilation Vt=

V(T) * fr

Alveolar Ventilation V(A)=

(V(T)-V(D)) *fr

V(D)/V(T)=

1-(Peco2-pAco2) paco2 can be substituted for pAco2

Pressure across chest wall (Pw)=

Pip-Pb(atm)

Respiratory Quotient (RQ)

Vco2/Vo2

PAo2=

(Fio2*(Pb-Ph2o))-(PAco2/RQ)

PAo2 clinical form

(150)-(PAco2*1.25)

(A-a)Do2=

PAo2-Pao2

Cao2=

(.003
Pao2) + (1.34
Hgb * (Sa02/100))