How to detect possible stuck stone in duct - Tip

I had this problem once and was determined to never let it happen again. Here is what I recommend:

Background:
Stuck stones cause bile to back up in the bloodstream, this causes bile to be excreted by urine. Urine turns dark brown or dark yellow.
If you notice a change in urine color, test the urine. If Bilibrium levels are above zero then do a flush to unstick the stone and take epson salts.
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I use the Chemstick 10 urine strips I bought on the web. They test for 10 different things including bilibrium.
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If you are paranoid, you could test daily. Cause it might take a few days for a stuck stone to cause the levels to change in the urine.
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It has worked for me.

Anyone see a flaw in this method?