Image transcription textThe most reliable and sensitive test of gas exchange is: OA. Pulse Oximetry O B. ABG C. Chest X-ray OD.Respiration rate At higher altitudes, the barometric pressure is lower, resulting in a lower inspired oxygenpressure and a lower PaO 2…. Show more Health Science Science Nursing Share QuestionEmailCopy link This question was created from Upper Respiratory Module.docx Comments (0)