Matthew Bennett: Lab Tests
NOTE: Remember that unnecessary laboratory testing wastes precious time and increases health costs for all of us!
| Laboratory test results: | |
|---|---|
| Laboratory Test | Results |
Sweat electrolyte test
|
|
| Fecal fat (fat absorption) test, 72 -hour collection. | Fat retention coefficient: 80% (normal: > 95%) |
| Secretin-pancrepzymin test (duodenal aspirate) | Absence of trypsin. |
| Chest x-ray | Presence of bronchiolar obstruction with areas of compensatory hyperaeration. |
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Questions:
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- 1. What do the results of the sweat test indicate?
- 2. What do the results of the fat test indicate?
- 3. What do the results of the pancreatic enzyme test indicate?
- 4. Which two organ systems are primarily affected by Matthew's condition?
- 5. Do the laboratory results support your preliminary assessment? Which disorder is affecting Matthew?
- Cystic fibrosis
- Galactosemia
- Muscular dystrophy
- Phenylketonuria
- 6. Explain the pathophysiology behind Matthew's bulky and foul-smelling stools.
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