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Cardiac output is the volume of blood pumped per minute. It's calculated from heart rate and stroke volume, crucial for shock assessment.
Formel
Calculate: CO = HR × SV (in mL)
- CO
- CO/BSA — CO/BSA
- HR
- HR value — Variable used in the calculation
- SV
- SV value — Variable used in the calculation
Steg-för-steg-guide
- 1Calculate: CO = HR × SV (in mL)
- 2Normal CO ≈ 5 L/min; normalize to body surface area: CI = CO/BSA
- 3Normal CI ≈ 2.5-3.5 L/min/m²
Lösta exempel
Ingång
HR 100, SV 50 mL
Resultat
CO = 5 L/min (normal)
Normal cardiac output
Vanliga misstag att undvika
- ✕Confusing cardiac output with blood pressure
- ✕Using SV values from different populations without BSA normalization
Vanliga frågor
What decreases cardiac output?
Decreased heart rate, decreased stroke volume (due to reduced preload, afterload, or contractility).
How is stroke volume measured?
Echocardiography, cardiac catheterization, or non-invasive methods. Not directly measured from vital signs.
Redo att beräkna? Prova den kostnadsfria Cardiac Output-kalkylatorn
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