A member asked:

Doing a 24 hour urine for pheo and 5-hiaa. i mistakingly urinated a little in the toilet once while having a bm. i have a large urine volune. does this ruin the test ? it was only a little?

3 doctors weighed in across 2 answers
Dr. Hiep Le answered

Specializes in Nephrology and Dialysis

Your doctor can extrapolate the result if you tell him (her) the approximate volume which was missed, especially when the results are borderline. However, because your total volume is large so I doubt the small amount of uncollected volume would skew the results. Good luck!

Answered 2/23/2023

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Best to repeat test with the full collection

Answered 2/23/2023

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