Phosphorus, Inorganic
| Order Code: | PO4 |
| Epic Lab Code: | LAB113 |
| Order Form: | A-1a General Lab or Epic Req |
Chemistry
6240 RCP
356-3527
6240 RCP
356-3527
Specimen:
Plasma
Collection Medium:
 |
| Plasma Separator Tube |
Alternate
Collection Media:
Call laboratory for additional acceptable specimen collection containers.
Minimum:
3 mL whole blood from light green tope tube or ONE microtainer for
pediatric patients.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Analytic Time:
1 hour (upon receipt in laboratory)
Reference Range:
Newborn to 11 months: 4.2 - 9.0 mg/dL
12 months to 15 years: 3.2 - 6.3 mg/dL
16+ years: 2.7 - 4.5 mg/dL
Significant value < 1.0 mg/dL
Reference ranges updated 6/30/2011.
Test
Limitations:
Criterion: Recovery within plus or minus 10% of initial value.
Plasma
Icterus: No significant interference up to an I index of 62.
Hemolysis: Significant positive interference at an H index greater than
300 (approximate hemoglobin concentration: 300 mg/dL). NOTE: This
interference results from inorganic phosphates produced by the action
of phosphatases on organic phosphates, both of which are released from
the red cell upon hemolysis (2).
Lipemia (Intralipid): No significant interference up to an L index of
1250. There is poor correlation between turbidity and triglycerides
concentration.
Thirty-five commonly used pharmaceuticals were tested in vitro. No
interference with the assay was found.
References:
(1) Glick MR, Ryder KW, Jackson SA. Graphical Comparisons of
Interferences in Clinical Chemistry Instrumentation. Clin Chem
1986;32:470-474.
(2) Tietz NW, ed, Clinical Guide to Laboraotry Tests, 3rd ed.
Philadelphia, Pa: WB Saunders Company, 1995:486, 487.
Methodology:
End Point Testing
CPT Code:
84100
See also:
Phosphorus-Other, Body Fluid (e.g., surgical drain, pericardial, peritoneal, peritoneal dialysis, pleural, or synovial)
Phosphorus-Other, Body Fluid (e.g., surgical drain, pericardial, peritoneal, peritoneal dialysis, pleural, or synovial)