Clinical Chemistry

For each of the following patients with laboratory testing, select the most likely analyte:

1. A 45-year-old man has the acute onset of marked pain with swelling of the first metatarsophalangeal joint of his right foot following consumption of a bottle of red wine. An aspirate of the joint reveals needle-shaped crystals that are negatively birefringent under polarized light. What is elevated in his serum:

2. A 28-year-old woman has diabetes mellitus type 1 that is poorly controlled. She has polyuria and polydipsia. Her breath has a fruity odor. What is elevated in the her serum:

3. A 26-year-old woman has Gilbert's syndrome. She has an important examination next week and is worried about obtaining a good score. What is slightly increased in her serum:

4. A 40-year-old man has an acute hepatitis panel with positive hepatitis B surface antigen and positive hepatitis B core antibody. What is increased in his serum:

5. A 39-year-old man with has the onset of severe abdominal pain over the course of two days. An abdominal CT scan reveals enlargement of the pancreas with fluid density, while the gallbladder appears normal. What is increased in his serum:

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