<prompt> Calculate the Alveolar ventillation per minute of a patient with respiratory rate 14min, tidal vol. 500 ml with a vital capacity 7000 ml, :4900 ml2000 ml7700 ml7000 ml  <response>: A i.e. 4900 mlAlveolar ventilation rest4.2Lmin.QTotal lung capacity4 - 6 lit.4Respiratory minute volume rest6 Lmin.QMaximum voluntary ventilation125- 170 1min.QTimed vital capacity - In 1 sec FeVi- In 3 sec83Q97 QWork of quiet breathing0.5 kg - mminQMaximum work of breathing1D kg- ml breath Alveolar ventilation TV - dead space volume x RR 500 -150 ml x 14 4900 mlNormally we consider dead space to be 150 ml. But also know that Dead space volume of a person is equal to twice his body weight i.e. a person weighing 70 kg has a dead space volume of 140 ml. 