Which of the following tests has the highest diagnostic value for lactose intolerance given the symptoms: intermittent abdominal distention, abdominal colic and excessive flatulenc... Which of the following tests has the highest diagnostic value for lactose intolerance given the symptoms: intermittent abdominal distention, abdominal colic and excessive flatulence?
Understand the Problem
The question describes a 12-year-old boy experiencing gastrointestinal issues (abdominal distention, colic, flatulence) after starting to drink milk regularly. The question is asking which diagnostic test would be most useful in determining the cause of these symptoms, given the likely possibility of lactose intolerance.
Answer
Hydrogen breath test.
Given the symptoms of intermittent abdominal distention, abdominal colic, and excessive flatulence, the hydrogen breath test has the highest diagnostic value for lactose intolerance.
Answer for screen readers
Given the symptoms of intermittent abdominal distention, abdominal colic, and excessive flatulence, the hydrogen breath test has the highest diagnostic value for lactose intolerance.
More Information
The hydrogen breath test is favored for diagnosing lactose intolerance because it directly measures the amount of hydrogen produced by bacteria in the large intestine after lactose is ingested. Undigested lactose leads to increased hydrogen production, which is then exhaled and measured.
Tips
A common misconception is that lactose intolerance can be diagnosed solely based on symptoms. While symptoms are indicative, a hydrogen breath test offers a more accurate diagnosis.
Sources
- Lactose tolerance tests: MedlinePlus Medical Encyclopedia - medlineplus.gov
- Lactose Intolerance: Signs, Symptoms, Test, Diet & Pills - emedicinehealth.com
- Lactose intolerance - Diagnosis & treatment - Mayo Clinic - mayoclinic.org
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