Question

an increase in which of the following can cause yellow foam in a patients urine.
a) bilirubin
b) creatinine
c) bun
d) creatine
e) protein

Explanation:

• Bilirubin: Bilirubin is a yellow - colored pigment. When there is an increase in bilirubin in the urine (bilirubinuria), it can cause the urine to have a yellow color and may contribute to the formation of yellow foam.
• Creatinine: Creatinine is a waste product from muscle metabolism. An increase in creatinine (usually indicates kidney dysfunction) does not directly cause yellow foam in urine due to its chemical nature and role in the body.
• BUN (Blood - Urea Nitrogen): BUN is related to protein metabolism and kidney function. Elevated BUN levels (azotemia) are associated with kidney problems but do not cause yellow foam in urine.
• Creatine: Creatine is involved in energy metabolism in muscles. Changes in creatine levels (unless there is a very rare disorder) do not lead to yellow foam in urine.
• Protein: While proteinuria (excess protein in urine) can cause foamy urine, the foam is usually white or colorless, not yellow.

Answer:

A. Bilirubin