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Title: How to calculate tidal volume for case study? Post by: roleevaeja on Oct 29, 2012 A 150 lb., 62-year-old man had a chronic productive cough, exertional dyspnea, mild cyanosis, and marked slowing of forced expiration. His pulmonary function and laboratory tests follow:
Frequency 16 breaths/min Alveolar ventilation 4.2 L/min Vital capacity (VC) 2.2 L Functional residual capacity (FRC) 4.0 L Total lung capacity (TLC) 5.2 L Forced Vital Capacity (FVC) 3.5 L Forced Expiratory Volume (FEV1) 1.5 L PaO2 62 mm Hg PaCO2 39 mm Hg Pulmonary function tests after bronchodilator therapy: Frequency 16 breaths/min Alveolar ventilation 4.35 L/min VC 2.4 L FRC 4.0 L TLC 5.2 L FVC 3.8 L FEV1 2.0 L PaO2 62 mm Hg PaCO2 38 mm Hg 7. Calculate the tidal volume (TV) for this person before and after the bronchodilator therapy. - I've seen the same exact post floating around this forum but it doesn't state how to calculate tidal volume. Please help if you can. Title: Re: How to calculate tidal volume for case study? Post by: doloresnichols on Oct 29, 2012 Before: 412.5 ml. After: 421.875 ml.
Title: Re: How to calculate tidal volume for case study? Post by: bob12345123 on Oct 29, 2012 A normal tidal volume = 500 ml/breath-so each above TV is altered.
Title: Re: How to calculate tidal volume for case study? Post by: roleevaeja on Oct 29, 2012 I don't understanf how you were able to get:
Before: 412.5 ml. After: 421.875 ml. And what does it mean by - each above TV is altered. How is it altered? Thanks so much. |