Respiratory volume in one minute

2021-05-17 03:12 PM

The average respiratory volume per minute is 6 litres/min. A person can live with the shortest period of respiratory volume per minute as low as 1.5 litres per minute and a respiratory rate of only 2-4 breaths per minute.

The 1-minute expiratory volume is the total amount of new air that moves into the airways per minute and is the tidal volume times the respiratory rate (number of breaths) per minute. Normal tidal volume is about 500ml, normal breathing rate is about 12 breaths/minute. Thus, the average respiratory volume per minute is 6 litres/minute. A person can live with the shortest period of respiratory volume per minute as low as 1.5 litres per minute and a respiratory rate of only 2-4 breaths per minute.

Respiratory rate can be increased 40-50 breaths/min, and tidal volume can be as large as vital capacity, about 4600ml in young adults. It can bring the respiratory volume per minute greater than 200ml/min, or more than 30 times normal. Most people can't get more than ½ or 2/3 of this value for longer than 1 minute.