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Jinsi ya kukokotoa Cardiac Output

Cardiac Output ni nini?

Cardiac output is the volume of blood pumped per minute. It's calculated from heart rate and stroke volume, crucial for shock assessment.

Fomula

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

Mwongozo wa Hatua kwa Hatua

  1. 1Calculate: CO = HR × SV (in mL)
  2. 2Normal CO ≈ 5 L/min; normalize to body surface area: CI = CO/BSA
  3. 3Normal CI ≈ 2.5-3.5 L/min/m²

Mifano Iliyotatuliwa

Ingizo
HR 100, SV 50 mL
Matokeo
CO = 5 L/min (normal)
Normal cardiac output

Makosa ya Kawaida ya Kuepuka

  • Confusing cardiac output with blood pressure
  • Using SV values from different populations without BSA normalization

Maswali yanayoulizwa mara kwa mara

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.

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