A patient has the following blood gas data. Calculate the al…

A patient has the following blood gas data. Calculate the alveolar oxygen tension (PAO2.) (in mmHg) ABG:  pH 7.47,  PaCO2  28,  PaO2  85,  HCO3  20, SaO2  95%VBG (mixed):  pH 7.43,  PvCO2  40,  PvO2  35, SvO2  58%FiO2  .60,    Hb  12, PB 740,  RQ 0.9

During a 6-minute Walk Test, you document that the patient’s…

During a 6-minute Walk Test, you document that the patient’s SpO2 decreases from 97% to 89% and the HR increased from 82 to 121 bpm. Use principles of gas diffusion and lung physiology to explain how these results would be indicative of a pulmonary diffusion defect. (ie What happened during exercise to cause a diffusion defect?)