Respiratory Volumes

Question

If tidal volume is 500 mL and breathing frequency is 14 breaths/min, what is the minute ventilation? (mL/min)

RankGuru · Accepted Answer

1. **Tidal Volume ($TV$)**: The volume of air inspired or expired during a normal breath (approx. $500 \ ml$).
2. **Minute Ventilation ($V_E$)**: The total volume of gas entering the lungs per minute.
3. **Formula**: 
   - $V_E = Tidal \ Volume 	imes Respiratory \ Rate$
4. **Calculation**:
   - $V_E = 500 \ ml/breath 	imes 14 \ breaths/min$
   - $V_E = \mathbf{7000 \ ml/min}$ (or $7 \ L/min$).

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