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80 Cards in this Set
- Front
- Back
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Formula for Compliance
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Volume/(Pplat - PEEP)
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Formula for Resistance
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(PIP - Pplat) / Flow
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Formula for Time Constant
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R x C
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Formula for PAO2
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(Pbaro - 47) FiO2 - (PaCO2 x 1.25)
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Formula for Minute Ventilation
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M.V. = RR x Vt
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Formula for dead space
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2.2 mL/Kg
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Formula for Alveolar Minute ventilation
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VA = (Vt - Vd) x RR
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P(A-a) Gradient
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PAO2 - PaO2
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PF Ratio and normals.
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PaO2/FiO2 , 350 -450
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Formula For Oxygen Extraction Ratio
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VO2/DO2
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Formula For Dead Space
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PaCO2 - PeCO2 / PaCO2
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Formula For arterial oxygen content
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CaO2 = (Hb x 1.34) SaO2 + (PaO2 x 0.003)
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Formula For venous oxygen content
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CvO2 = (Hb x 1.34) SvO2 + (PvO2 x 0.003)
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End Capillary Content
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CcO2 = (Hb x 1.34) 1.0 + (PAO2 x 0.003)
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Formula For Oxygen uptake
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VO2 = C.O. x C(a-v)O2 x 10
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Formula For delivered oxygen
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DO2 = C.O. x CaO2 x 10
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Formula For Oxygen Extraction Ratio
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C(a-v)O2 / CaO2 or
VO2 / DO2 |
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Normal value PaO2
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80 - 100 mmHg
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Normal Values & Critical Numbers for PaCO2
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N 35 - 40 mmHg
Critical: > 55 mmHg |
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Normal Values & critical Number for pH
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N 7.35 - 7.45
C < 7.35 |
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Normal & critical numbers for Tidal Volume
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N: 5-8 mL/Kg
C: < 5 mL/Kg |
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Normal and criticals for Vital Capacity
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N: 65 - 75 mL/Kg
C: < 10 mL/Kg |
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Normal & critical numbers for RR
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N: 12- 20
C: > 35 |
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Normal & critical numbers for MIP
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N: 80-100 cmH2O
C: < 20 cmH2O |
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Normal and critical values for MEP
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N: > 100 cmH2O
C: < 40 cmH2O |
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Normal and critical numbers for Max Voluntary Ventilation
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N: 120 - 180 LPM
C: < 2x M.V. |
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Normal & critical numbers for Vd/Vt
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N: 0.25 - 0.40
C: > 60% |
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Normal and critical values for P(A-a)O2
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N: on r/a = 2 - 30 mmHg
on 100% O2 = 25-65 mmHg Critical:> 350 |
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Normal and critical values for PF Ratio
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N: 350 - 450
C: < 200 |
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Normal Minute Ventilation
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5-6 Lpm
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Normal Hemoglobin Values
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12-16 g%
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Normal and Critical values for PaO2/PAO2
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N: 0.75 - 0.95
C: < 0.15 |
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Formula for content difference
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C(a-v)O2 = CaO2 - CvO2
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Formula for volume lost to circuit * with insp pause*
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Ccircuit - (Pplat - PEEP)
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Formula for volume lost to circuit * No insp pause)
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Ccircuit - (PIP-PEEP)
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Formula for compliance of the circuit
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Ccircuit = Vt / (Pplat - PEEP)
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Formula for I:E Ratio
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Inspiratory time/ Exp time
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Formula for PIP:
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PEEP + Pr + Pc
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Formula for Ti dynamic
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Tidyn = Vol / Flow
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Formula for effective volume
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Veff = Vdelivered / Vlost
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Formula for cardiac Output
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S.V. x HR
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What is normal stroke volume?
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60 - 130 ml/beat
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Formula for stoke volume:
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EDV - ESV
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Normal EDV value:
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120-180 ml/beat
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Normal ESV
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50-60 ml/beat
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Formula for Blood Pressure
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SVR x C.O.
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Equation for Ejection fraction
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S.V. EDV x 100
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Normal ejection fraction?
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> 50-60%
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Fick's Method for measuring cardiac ouput
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C.O. = VO2 / C(a-v)O2 x 10
* This is a re arrangement of the VO2 equation |
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Normal range for VO2 ?
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???
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Formula for cardiac index?
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C.O. / BSA
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Normal for cardiac index?
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2.5 - 4.0 L/min/m2
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Formula for Stroke Index?
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S.V. / BSA or CI / HR
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Normal value for stroke index?
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30-50 ml/m2
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Formula for systemic vascular resistance:
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SVR = (MAP - CVP /C.O.) x 80 dynes/sec/cm5
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Normal for SVR
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950 - 1300 dynes/sec/cm5
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Formula for PVR?
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( MPAP - PCWP)/ C.O. x 80
dynes/sec/cm5 |
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Normal values for PVR?
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155 - 255 dynes/sec/cm5
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Formula for Pulmonary Vascular Resistance Index? (PVRI)
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(MPAP - PCWP)/ C.I. x 80
dynes/sec/cm5/m2 |
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Normal value for PVRI ?
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200 - 400 dynes/sec/cm5/m2
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Formula for Systemic vascular resistance index? (SVRI)
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(MAP - CVP)/ C.I. x 80 dynes/sec/cm5/m2
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Normal values for SVRI ?
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1600 - 2400 dynes/sec/cm5/m2
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Formula for coronary perfusion pressure?
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CPP = Diastolic Bp - PCWP
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Normal values for CPP ?
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60 - 80 mmHg
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Normal values for CVP?
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2-6 mmHg
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What is considered normal JVD?
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< 3 cm above sternal angle
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Normal PA systolic?
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15 - 25 mmHg
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Normal PA diastolic?
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8-15 mmHg
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Normal pulmonary artery pressure?
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15-25 / 8-15 mmHg
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Normal PCWP?
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5- 12 mmHg
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Normal RAP?
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2-6 mmHg
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Normal Right Ventricular Pressure (RVP)?
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20-30/0-5 mmHg
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Normal MPAP?
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10 - 20 mmHg
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Normal MAP:
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85 - 115 mmHg
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Normal PVR ?
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155 - 255 dynes/sec/cm5
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Normal SVR ?
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900-1300 dynes/sec/cm5
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Normal Ejection Fraction? (EF)
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50 - 60 %
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Normal end diastolic volume?
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120 - 180 mls
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Normal creatinine Levels?
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50 - 110 micro moles/L
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Normal urea levels?
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2.8 - 7.7 mmol/L
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