Q46-15 LACTOSE INTOLERANCE

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Q46-15 LACTOSE INTOLERANCE

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robin082006
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12/12/06 - 03:13 PM

A 45-year old Asian-American female presents to the family physician office for bloating, flatulence, abdominal cramps and explosive watery diarrhea following ingestion of dairy products. She denies any weight loss. She also denies bone pain or easy bruising. Physical examination reveals abdominal distension and borborygmi. You decide to investigate the patient further. Which of the following test result is most likely to be observed?

A. Positive Clinitest of stool for oxidizing substances
B. Decreased stool osmotic gap
C. Positive hydrogen breath test
D. Alkaline stool pH
E. Positive acid steatocrit test

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Aashi
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12/12/06 - 03:36 PM

Its C--> Positive H2 breath test

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ed222
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12/13/06 - 06:00 AM

I think is lactose intolerance. D

anjushree
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12/14/06 - 07:40 AM

C IS RIGHT

robin082006
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12/14/06 - 11:00 AM

ANSWER IS C

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AAAAA
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12/14/06 - 06:13 PM

C

The Hydrogen Breath Test. This test measures the amount of hydrogen in a person’s breath. Very little hydrogen is normally detectable. However, undigested lactose in the colon is fermented by bacteria and produces various gases, including hydrogen. The hydrogen is absorbed from the intestines, carried through the bloodstream to the lungs, and exhaled. In this test, the person drinks a lactose-loaded beverage and the breath is analyzed at regular intervals. Raised levels of hydrogen in the breath indicate improper digestion of lactose. Certain foods, medications, and cigarettes can affect the accuracy of the test and should be avoided before taking the test. People should check with their doctor to make sure they are not taking medications that may interfere with test results.

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AAAAA
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12/14/06 - 06:14 PM

robin082006 wrote:
A 45-year old Asian-American female presents to the family physician office for bloating, flatulence, abdominal cramps and explosive watery diarrhea following ingestion of dairy products. She denies any weight loss. She also denies bone pain or easy bruising. Physical examination reveals abdominal distension and borborygmi. You decide to investigate the patient further. Which of the following test result is most likely to be observed?

A. Positive Clinitest of stool for oxidizing substances
B. Decreased stool osmotic gap
C. Positive hydrogen breath test
D. Alkaline stool pH
E. Positive acid steatocrit test

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