Sunquest Code:PHOS  
Epic Code:LAB113Epic Name:Phosphorus
Synonyms:PO4; Phosphate
Methodology:Bichromatic end point
Turnaround Time:Performed and reported 24 hours/day.

Collection Instructions

Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Container:Green (lithium heparin, gel) (Red (no gel), Red or gold (gel))
Causes for Rejection:Hemolysis

Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1.25 mL, 0.1 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:Serum/plasma should be separated from the cells within 2 hours to avoid falsely high PO4. Hemolyzed specimens are unacceptable unless analyzed immediately. Stability: Refrigerated - 7 days; frozen - 6 months.
Test Performed at or Referral Lab Chemistry  (University of Minnesota Health Maple Grove Clinics, Fairview Range - FRMC, UMMC-East Bank, Oxboro Bloom, Fairview Lakes - FLMC, Fairview Ridges - FRH, Fairview Northland - FNMC, Fairview Southdale - FSH, UMMC/UMMCH-West Bank, M Health Clinic and Surgery Center, Grand Itasca GICH)


Critical Range:Less than 1.0 mg/dL
GICH: Less than 1.0 or greater than 10.0 mg/dL
Reference Range:
Age mg/dL
0-4 days 4.6-8.0
5 d - 3 y 3.9-6.5
4-11 y 3.7-5.6
12-15 y 2.9-5.4
16-18 y 2.8-4.6
19 y and older 2.5-4.5
GICH: All ages 2.5-5.0 mg/dL  
Use:Evaluate phosphorus metabolism.

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