Discuss the respiratory consequences of flying in an airplane. If barometric pressure in the cabin is 580 mmHg, what would be the alveolar oxygen
Added by Stacy R.
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- As an airplane ascends, the barometric pressure decreases. At cruising altitudes, the cabin pressure is typically maintained at a level equivalent to an altitude of about 6,000 to 8,000 feet, which is lower than sea level pressure (760 mmHg). Show more…
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Cruising altitude for a commercial aircraft can range from 36,000 to 42,000 feet. Cabins are pressurized; however, air pressure is equivalent to 6,000-8,000 feet above sea level. The average altitude (around 39,000 feet) and equivalent air pressure (around 7,000 feet above sea level) result in approximately a 15% reduction in the partial pressure of oxygen. Assuming a hemoglobin concentration of 14 g/dL blood and a partial pressure of oxygen (Pao2) of 100 mm Hg at sea level, answer the following. (10 points) a. What is her effective Pao2 while traveling on an international flight? (2 points) b. What is her total oxygen content while traveling on an international flight? (2 points) c. Draw a normal oxyhemoglobin dissociation curve and one that represents expected changes for the patient while she is traveling on an international flight. What are the physiological consequences of the predicted shift? (4 points) d. Would administering oxygen via a rebreather mask or nasal cannula have been beneficial? Why or why not? (2 points)
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