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6 Cards in this Set
- Front
- Back
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As a diver breathing 80% N2 ascends from a dive, the elevated alveolar PN2 falls. TRUE/FALSE
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TRUE. N2 diffuses from the tissues into the lungs along the partial pressure gradient. If return to atmospheric pressure is gradual(physiological decompression), no harmful effects are observed.
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What happens if te ascent is rapid?
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N2 escapes from solution. Bubbles form in te tissues and blood causing the symptoms, decompression sickness,(the bends, caisson disease).
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What is the result of bubbles in the tissues?
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Severe pains, especially around joints, and neurologic symptoms thatinclude paresthesias and itching.
Bubbles in the blood, in more severe cases, obstruct the arteries to the brain and spinal cord. |
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How soon do symptoms appear?
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10-30 minutes after the diver resurfaces, and they progress. Spinal cord pain is most common. Respiratory failure can result.
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What are the Chokes?
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Bubbles in the pulmonary capillaries are responsible for the dyspnea that divers call the chokes.
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What is the treatment?
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Recompression therapy is the most appropriate.
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