Mark deteriorated rapidly and lost consciousness by the time the group reached t

Question

Mark deteriorated rapidly and lost consciousness by the time the group reached the lower camp. The urgency of the situation strengthened the tired legs of the climbers, as Tom, John, and Pete carried Mark the final yards towards camp. Emily had run ahead to call for support help, and the group was told an airlift was on its way and would be there within the hour. The camp's medical tent had some basic supplies and a resident paramedic, and he and Emily went to work stabilizing Mark with oxygen. 90 Minutes Later, Denali Valley Hospital "We have a 28-year-old white male, unresponsive, no prior history of pulmonary disease, who became unconscious around 15,000 feet after hiking to 17,000 feet earlier today. His friends say he was having severe breathing difficulty prior to losing consciousness.. The following tables summarize the findings of the Denali Valley Hospital Medical Team: Mark's PULMONARY FUNCTION TESTS Normal Inspired Oxygen Tension Vapor Pressure Alveolar Oxygen RQ Tidal Volume 147 Torr 45 Tom 110 Torr 0.66 0.4L 150 Torr 47 Torr 98-104 Torr 0.78-0.82 Torr 0.5 L

Explanation / Answer

1. The amount of oxygen in alveolar space is high.

2. The amount of arterial oxygen in blood is low.

3. Given alveolar oxygen is 98-104 Torr, and Mark's arterial oxygen is not expected because it is 52 Torr.

4. Generally, alveolar oxygen is causing Mark's observed level of arterial oxygen.Alveolar gradient is a measure of difference between alveolar concentration of oxygen and arterial concentration of oxygen which is used in diagnosing the source of hypoxemia.

5. Mark's blood have lower than normal pH and his low CO2 levels is mainly due to the condition respiratory acidosis.It is due to decreased respiratory rates and low CO2 in blood.

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