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Using the values provided in the table below, CALCULATE the average vital capacity, tidal volume and expiratory reserve volume, by adding the values and dividing by 3. MEASURE your respiratory rate one time and record in the table below. Then using these values, CALCULATE: minute ventilation, alveolar ventilation, inspiratory reserve volume, inspiratory capacity and residual volume. The units for all volumes and capacities should be in mL or L. Volume or Capacity Reading 1 Reading 2 Reading 3 Average Value Forced) Vital Capacity (VC4600 ml. 4800ml. 4800 ml. ml.) Tidal Volume (V. mL) 600 ml 500 ml ml. Expiratory Reserve Volume (ERV, ml.) 1200 ml. 1100 ml. 1100 mL Respiratory Rate (breaths/min) -NA- -NA- -NA- Minute ventilation or minute volume (MV) represents the volume of air moved into and out of the lungs per minute. Minute ventilation is calculated using the following equation: MV (mL/min or L/min) =V, (mL) x respiratory rate (breaths/minute) However….. Some of the air moved into the lungs never makes it all the way to the alveoli, but instead gets trapped” in the anatomical dead space (the conducting zone of the respiratory tract). Therefore, a more accurate measure of the volume of air available for gas exchange at the alveoli is the alveolar ventilation. Alveolar ventilation is calculated using the following equation: V. (mL/min or L/min) = (V, – dead space volume) x respiratory rate … where dead space volume generally approximates 150mL. Now: given the data and the equations above, please calculate the following lung volumes and capacities. Minute Ventilation (calculate mL/min or L/min) Alveolar Ventilation (calculate: mL/min or L/min; assume a dead space volume of 150mL) Inspiratory Reserve Volume (calculate; mL) Inspiratory Capacity (calculate; ml.) The following equation is used to predict Vital Capacity (VC; in Liters): Males: VC=0.052H -0.022A – 3.60 Females: VC=0.041H -0.018A – 2.69 …where H = height in centimeters (1 inch = 2.54 cm) and A= age in years. Measured vital capacity in an individual with normal pulmonary function should be at least 80% of the predicted value. In general, individuals who smoke or have a pulmonary disease such as emphysema will have a reduced vital capacity. Please calculate your predicted vital capacity using the appropriate equation listed above and record it in the table below. Predicted Vital Capacity
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