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Old 09-30-2012
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Vascular The concept of Hyperemia?

Which one of the listed clinical scenarios best illustrates the concept of active hyperemia?
A 69-year-old male who dies secondary to progressive heart failure and at autopsy is found to have a “nutmeg” liver
A 6-year-old boy who develops the sudden onset of intense scrotal pain due to testicular torsion
A 37-year-old male who develops massive swelling of the scrotum due to infection with Wucheria bancrofti
A 22-year-old second-year medical student who develops a red face after being asked a question during a lecture
A 71-year-old female who develops perifollicular hemorrhages due to a deficiency of vitamin
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Old 09-30-2012
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A 6-year-old boy who develops the sudden onset of intense scrotal pain due to testicular torsion
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22-year-old second-year medical student who develops a red face after being asked a question during a lecture


???
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A 22-year-old second-year medical student who develops a red face after being asked a question during a lecture
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Old 09-30-2012
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A 22-year-old second-year medical student who develops a red face after being asked a question during a lecture

I believe the testicular torsion is passive hyperemia - since it is due to obstruction of blood flow.
Active hyperemia has to do with vasodilation and increased blood flow.

Correct me if I am wrong
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Old 10-01-2012
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The Correct Answer is: A 22-year-old second-year medical student who develops a red face after being asked a question during a lecture

Hyperemia refers to excess amounts of blood within an organ. It may be caused by increased arterial supply (active hyperemia) or impaired venous drainage (passive hyperemia). Examples of active hyperemia include increased blood flow during exercise, blushing (such as embarrassment associated with being asked a question during a lecture), or inflammation. Examples of passive hyperemia, or congestion, include the changes produced by chronic heart failure. These changes include chronic passive congestion of the lung or the liver. The lung changes are characterized by intraalveolar, hemosiderinladen macrophages, called “heart failure cells.” Congestion in the liver is characterized by centrilobular congestion, which is seen grossly as a “nutmeg” appearance of the liver. In contrast to hyperemia, hemorrhage refers to the leakage of blood from a blood vessel. Blood may escape into the tissue, producing a hematoma, or it may escape into spaces, producing a hemothorax, hemopericardium, or hemarthrosis. Superficial hemorrhages into the skin or mucosa are classified as petechiae (small, pinpoint capillary hemorrhages), purpura (diffuse, multiple superficial hemorrhages), or ecchymoses (larger, confluent areas of hemorrhages)
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tai you are right and all those you listed active hyperemia are correct
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