A 72-year-old male with long history of chronic obstructive…

A 72-year-old male with long history of chronic obstructive pulmonary disease enters the emergency department with bibasilar pneumonia.  The following data are rapidly accumulated:            FIO2        0.21                         RR 25    pH           7.24                         HR 108 PaCO2    80 mm Hg               BP 130/90 PaO2      42 mm Hg                Temp 101.2° F HCO3‾   34 BE         +5 What is the clinical assessment of this patient?  acute alveolar hyperventilation superimposed on chronic ventilatory failure  acute ventilatory failure superimposed on chronic ventilatory failure   chronic ventilatory failure  acute ventilatory failure 

Which of the following best describes the difference between…

Which of the following best describes the difference between V/Q mismatch and shunt when supplemental oxygen is administered?  Both will respond equally well.  V/Q mismatch will respond well but shunt will not.   V/Q mismatch will not respond but shunt will respond well.  Neither will respond to the administration of supplemental oxygen.