1. Is the amount of oxygen in the alveolar space high, low or normal? __________

Question

1. Is the amount of oxygen in the alveolar space high, low or normal? ____________________

2. Is the amount of arterial oxygen (in the blood) high, low or normal? _____________________

3. Given the alveolar oxygen level, is Mark’s arterial oxygen to be expected? ______________

4. Explain what is causing Mark’s observed level of arterial oxygen.

5.How could Mark’s blood have a lower than normal pH given his low CO2 levels?

Part III- Airlifft 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: PULMONARY FUNCTION TESTS Mark's Normal 147 Torr Inspired Oxygen Tension Vapor Pressure Alveolar Oxygen RQ Tidal Volume 150 Torr 47 Torr 98-104 Torr 0.78-0.82 Torr 0.5 L 45 Torr 110 Torr 0.66 0.4 L

Explanation / Answer

1. the amount of oxygen in the alveolar space is normal. it is just little bit above its normal range which is perhaps due to the effect of high altitude.

2. the amount of arterial oxygen is low. this is because as the altitude increases the atmospheric pressure decreases and we know that the relationship of arterial oxygen with atmospheric pressure is inversely proportional.

3. no because the difference between both of them is far too much.

4. increase in altitude decreases the atmospheric pressure which inturn decreases the capacity of blood to carry oxygen.

5. As according to the description mark probably went into tachypnea( rapid breathing), which is body own way of buffering the increases in the concentration of carbon di oxide. that's why we see low pH and low CO2 levels.

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