Cardiac Output کا حساب کیسے لگائیں
Cardiac Output کیا ہے؟
Cardiac output is the volume of blood pumped per minute. It's calculated from heart rate and stroke volume, crucial for shock assessment.
فارمولا
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
مرحلہ وار گائیڈ
- 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
حل شدہ مثالیں
ان پٹ
HR 100, SV 50 mL
نتیجہ
CO = 5 L/min (normal)
Normal cardiac output
عام غلطیاں جن سے بچنا ہے
- ✕Confusing cardiac output with blood pressure
- ✕Using SV values from different populations without BSA normalization
اکثر پوچھے جانے والے سوالات
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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