Lab Information Manual

Laboratory:

Clinical Biochemistry (BIOCHEMICAL GENETICS)

Test Name:

Organic Acid Screen - (U)

Test Code: OA

Clinical Information:

Test Indications: Diagnosis of inborn errors of metabolism due to an organic aciduria. These typically present as acute life-threatening illness in early infancy, or later in childhood with unexplained developmental delay with intercurrent episodes of metabolic decompensations. Organic acids should be ordered when there is a severe and persistent metabolic acidosis of unexplained origin, elevated anion gap, and severe neurologic manifestations, such as seizures. The presence of ketonuria, hyperammonemia, hypoglycemia, and lactic acidemia are frequent findings, especially during acute episodes of metabolic decompensations.
Recommendations: Complete Biochemical Genetics Patient Information (T602) and send to HSC Biochemical Genetics Laboratory FAX 204-787-3846. Write PHIN or Hospital ID next to Patient Information on form. This will be sent with the sample to Mayo to aid in the interpretation of test results.

Collection Devices:

Preferred Device:

1 - Urine Collection 12 mL Tube

Urine Collection 12 mL Tube
Manufacturer: Sarstedt Canada Inc. (vendor)

Catalogue #:

(Similar lab approved leak-proof containers acceptable)

Specimen Required:

Urine: 10.0 mL

Pediatric Urine: 4.0 mL

Collection Information: Contact Biochemical Genetics Lab 204-787-4530 if insufficient volume in child under 2.
Specimen Stability:
Refrigerated: 14 days
Frozen: 416 days

Referral:

Shipping & Storage: Store and ship frozen (preferred) to Biochemical Genetics Laboratory (HSC Metabolic Lab). Include the original requisition.
Referred Out Location: Mayo Clinic Laboratories Test ID: OAU

Requisition:

Reference Values:

Reference Intervals: A descriptive report will be sent.

Availability:

Within 2 Weeks