Tests- Prep Required Blood Collection Distribution Guide: Restrictive Guidelines - Blood (Includes Catecholamine, Chromium, Chromosome Analysis testing, Copper, Heavy Metal Panel, Renin (Plasma Activity), Selenium and Zinc.) Glucose Tolerance Testing Information Protime (INR) - Coumadin® Stool Collection Fecal Fat Quantitative (48-72 Hrs), Stool Occult Blood, Stool Ova and Parasites, Stool (O&P) Urine Collection Restrictive Guidelines - 24 Hr Urine Catecholamine Fractionation 5-HIAA Homovanillic Acid-HVA Metanephrines Oxalate VMA Considerations The tests listed on the left require preparation prior to collection. Please share these information/collection guides with your patient as tests are ordered.