Sample NBCRNA Equations Questions
and Answers.
Serum Osmolarity -
\Serum Osmolarity = 2[Na+] + (glucose/18) + (BUN/2.8)
Minute Ventilation -
\VE = Vt x RR
Alveolar Ventilation -
\VA = (Vt - Vd) x RR
Bohr Equation -
\EtCO2 can be used instead of PeCO2
Ohm's Law -
\Flow = Pressure Gradient / Resistance
or
CO = (MAP - CVP) / SVR
Poiseuille's Law -
\
MAP Equation -
\
Cardiac Output Equation -
\CO = HR x SV
5-6 L/min
Cardiac Index -
\CI = CO/BSA
[2.8-4.2 L/min/m^2]
Stroke Volume Equations -
\SV = EDV - ESV
SV = CO x 1000 / HR
50-110 ml/beat
