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3.   A surgeon removed three adjacent bronchopulmonary segments from the left lung of a patient with TB. Almost half of the lung was removed, yet there was no severe bleeding and relatively few blood vessels had to be cauterized (closed off). Why was the surgery so easy to perform? (4 points). Answer:


4.   After a week of scuba diving in the Bahamas, Mary Ann boards an airplane. During her flight home, she develops aching joints, nausea, and dyspnea which resolve during landing. During the flight, the cabin pressure was equivalent to an altitude of 8000 feet. Explain her problem. (4 points) Answer:
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3-The vascular supply to each bronchopulmonary segment arrives via a single separate point of entry, the hilus, so it is easy to ligate. The vessels out in the spongy lung tissue itself are few and tiny. Each segment is surrounded by connective tissue.

4-Decompression sickness or the bends. One is not supposed to scuba dive and fly in the same 24 hour period. Another name is the bends and is the name given to a variety of symptoms suffered by a person exposed to a decrease (nearly always after a big increase) in the pressure around the body. The body must adapt to the pressure following a rapid ascent or after diving and flying in a short period of time.

These situations cause excess inert gases, which have dissolved in body liquids and tissues while the gas was being inhaled at higher pressure. As the pressure reduces it form gas bubbles within the body. The main inert gas for those who breathe air is nitrogen. The bubbles result in the symptoms of decompression sickness
Last Edit: 2 years ago by Nelson Muntz
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