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Porphyrins, Fecal

Item Value
Clinical Questions Does my patient have acute porphyria?
Approval req'd? No
Available Stat? No
Test code MOLT (Order in Apex as 'Miscellaneous Outside Lab Test' using the complete test name above)
Test group Porphyrins
Performed by ARUP
Sendout? Yes
Method HPLC
Patient Preparation The patient should be off medications, if possible, for at least 1 wk prior to sample collection.
Collection Instructions Protect from light during collection, storage, and shipment. Freeze specimen and wrap in foil immediately after collection.
Container type Urine cup wrapped in foil
Amount to Collect 5 g stool
Sample type Random stool
Preferred volume 5 g stool
Min. Volume 1 g stool
UCSF Rejection Criteria Container not refrigerated or protected from light during collection.
Processing notes Freeze the entire specimen in the collection container at -20C.
Units nmol/g dry weight stool
Normal range
Coproporphyrin 0-45 nmol/g dry weight
Protoporphyrin 0-100 nmol/g dry weight
Stability Frozen 3 weeks
Turn around times Test performed Wednesday. Turnaround: 3-10 days.
Additional information To convert mg/d to µmol/d (SI units) multiply DiCP by 0.00178, TetraCP by 0.00153, HeptaCP by 0.00128, OctaCP by 0.00120.
CPT coding 84126-90
Last Updated 11/19/2015 3:32:16 PM
Entry Number 760
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