Infection and Urobilinogen Quiz

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Questions and Answers

What is typically associated with excess urobilinogen in urine and absent bilirubin?

Hemolysis (correct)
Cholecystitis
Cholangitis related to obstruction
Acute liver failure

Increased levels of urobilinogen can be observed in which of the following conditions?

Hypertension
Megaloblastic anemias (correct)
Liver cirrhosis
Chronic kidney disease

What causes dark-colored stools in jaundiced patients?

Presence of urobilinogen in urine
Excess bilirubin in urine
Excretion of excess urobilinogen in feces (correct)
Increased fat absorption

What can lead to increased urinary urobilinogen levels in a patient?

<p>Fever associated with dehydration (D)</p> Signup and view all the answers

Which condition is NOT typically associated with increased urinary urobilinogen?

<p>Biliary obstruction (C)</p> Signup and view all the answers

Flashcards

Urobilinogen and bilirubin in urine

Increased levels of urobilinogen in urine, along with the presence of bilirubin, may indicate an infection like cholangitis associated with an obstruction.

Urobilinogen without bilirubin

Excess urobilinogen in urine without bilirubin is usually a sign of hemolysis, where red blood cells are being broken down.

Causes of Hemolysis

Hemolysis can occur due to rapid destruction of red blood cells (acute lysis) or the breakdown of red blood cell precursors in the bone marrow (megaloblastic anemias).

Urobilinogen and Bleeding

Bleeding into tissues can also increase urobilinogen levels, as the body breaks down the excess bilirubin produced.

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Dark Stools and Urobilinogen

The presence of high amounts of urobilinogen in urine and stool can lead to dark-colored stools due to the excess breakdown products.

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Study Notes

Infection and Urobilinogen in Urine

Cholangitis with obstruction leads to high urine urobilinogen and bilirubin excretion.
High urine urobilinogen with absent bilirubin suggests hemolysis.
Hemolysis, including acute erythrocyte lysis or bone marrow erythrocyte precursor destruction (megaloblastic anemias), increases urine urobilinogen.
Bleeding into tissues and subsequent bilirubin excess also increases urinary urobilinogen.