Basic Hemodynamic Formulas
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each of the black spaces below before clicking
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| O2 Capacity Formula | Hemoglobin X 1.36
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| Oxygen Content | O2 Capacity X O2 Saturation
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| Hemoglobin x 1.36 | O2 Capacity
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| O2 Capacity x O2 Saturation | Oxygen Content
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| AVO2 Difference | (AO sat X 1.36 X hemoglobin) - (PA sat X 1.36 X hemoglobin)
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| (AO sat X 1.36 X Hemoglobin) - (PA sat X 1.36 X hemoglobin) | AVO2 Difference
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| Fick Cardiac Output (L/min) | O2 consumption (ml/min) DIVIDED BY AVO2 difference X 10
O2 consumption ml/min DIVIDED BY AVO2 Content difference MULTIPLIED BY 10
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| For the Fick CO what do you need to multiply the AVO2 by to convert from ml/min to L/min? | 10
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| O2 consumption range | 220-290. 250 is considered the average.
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| Cardiac Index Formula | CO/BSA
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| Cardiac Output DIVIDED BY the Body Surface Area equals .... | Cardiac Index. The lower the # the sicker the patient.
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| Body Surface Area Formula | Height X Weight X Hemoglobin
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| Stroke Volume is what? | Amount of blood pumped by the left ventricle of the heart in one contraction
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| Stroke Volume (SV) Formula | Cardiac Output X 1000 DIVIDED BY Heart Rate
SV=CO X 1000 / HR
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| CO X 1000 / HR | Stroke Volume
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| Pulse Pressure | The difference between the systolic # and the diastolic #
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| MAP (Mean Arterial Pressure) | Aortic Systole MINUS Aortic Diastole multiplied by 1/3 PLUS the Aortic DIASTOLE
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| Aortic Pulse Pressure X .33 + Diastole= | MAP (Mean Arterial Pressure)
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| MPA (Mean Pulmonary Artery Pressure) | Pulmonic Systole MINUS Pulmonic Diastole MULTIPLIED BY 1/3 PLUS Pulmonic Diastole
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| Pulmonic Pulse Pressure X .33 + pulmonic Diastole = | MPA (Mean Pulmonary Artery Pressure)
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| Why is the Hakkai Formula used | For quick approximation only of the valve area
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| Hakkai Formula | Valve Area = CO / Square Root of the mean gradient (aortic or mitral)
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| Cardiac Output DIVIDED by the Square Root of the mean gradient (aortic or mitral) | Hakkai Formula for Valve Area
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Created by:
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