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RSPT MV Formulas

TermDefinition
VD Dead Space (VD) VD = PaCO2 - PECO2 PaCO2
P(A-a)02 Gradient P(A-a)02 = (760 - 47 x Fi02) – (PaC02 x 1.25) Second Step:P(A-a)02 – Pa02
Ca02 Carrying Capacity Ca02 = (1.34 x Hgb x Sa02) + (PaC02 x 0.003)
Cst Static Compliance Cst = VT/ Ppl-PEEP
Cdyn Dynamic Compliance Cdyn= VT/Ppk-PEEP
RAW Airway Resistance: AirFlow Obstruction RAW=PIP-Ppl/PF
VA: Alveolar Ventilation VA=100-VD
VA Alveolar Minute Ventilation (VA) VA = VA% x Ve
Ve Minute Ventilation (Ve) Ve=VT X RR
Ve: Estimated Minute Ventilation Ve = BSA x Factor
QS/QT Classic Shunt Equation QS/QT = P(A-a)02 x 0.003/P(A-a)02 x 0.003 + C(a-v)02
mPAW Mean Airway Pressure: mPAW = (Ppk x IT) + (PEEP x ET)/ TCT
TCT Total Cycle Time TCT=60/RR
I Time IT = TCT/ (I + E ratio)
RR Respiratory Rate RR = Ve x VT
PF Peak Flow PF = Ve x (I + E ratio)
Peak Flow Peak Flow PF = VT / IT (60)
Square Wave to Decelerating Wave Multiply x 2
Decelerating Wave to Square Wave Divide by 2
PaCO2: Ventilation Stabilize PaC02 PaC02 = Actual PaCO2/Desired PaCO2 (RR,Ve,VT)
PaO2: Oxygenation Stabilize Pa02 Pa02 = Desired Pa02/Actual Pa02 (FI02)
Cv02: Venous Level Carrying Capacity : Venous Level Cv02= (1.34 x Hgb x Sv02) + (Pv02 x 0.003)
C(a-v)02 C(a-v)02 C(a-v)02 = Ca02 – Cv02
D02 02 Delivery D02 = CO x Ca02 x 10
V02 02 Consumption V02 = C0 x C(a-v)02 x 10
02ER 02 Extraction 02ER = V02/D02 OR Ca02 – V02/Ca02
R/L R/L Gradient: R/L = (PAdia – PCWP)
P/F Ratio P/F Ratio = Pa02/Fi02
MAP Mean Arterial Pressure MAP = Sys + Dia (2)/3
PB Pulse Pressure PB = Systolic – Diastolic
SVR Systemic Vascular Resistance SVR = (MAP – CVP)/ C0 X 80
PVR Pulmonary Vascular Resistance PVR = (mPAP – PCWP)/ C0(80)
SV Stroke Volume SV = CO/HR
CI Cardiac Index CI = CO/BSA
Fick Equation V02 / C(a-v)02(100)
C0 Cardiac Output C0 = HR/SV
RSBI Rapid Shallow Breathing Index RSBI = f/VT
Anion Gap Anion Gap (NA + K) – (Cl - HCO3)
Created by: 5549593105051512
 

 



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