Zinc Protoporphyrin (ZPP), Whole Blood Industrial
Ordering Recommendation
Use as an OSHA-mandated indicator to assess lead exposure in the industrial setting. For a complete assessment of industrial lead exposure in adults and exposure guidance in accordance with OSHA regulations, Lead, Industrial Exposure Panel, Adults (0025016) can be ordered.
Methodology
Quantitative Hematofluorometry
Performed
Mon-Fri
Reported
1-4 days
New York DOH Approval Status
Specimen Required
Lavender (EDTA), royal blue (EDTA), or tan (EDTA). Use royal blue (EDTA) tube when also testing for lead.
Transport 1 mL whole blood. (Min: 0.2 mL)
Refrigerated.
Specimens not collected in EDTA. Clotted, frozen, or hemolyzed specimens.
Ambient: 30 hours; Refrigerated: 5 weeks; Frozen: Unacceptable
Reference Interval
Test Number |
Components |
Reference Interval |
---|---|---|
Zinc Protoporphyrin, Blood | 0-40 µg/dL | |
Zinc Protoporphyrin (ZPP) WholeBld Ratio | 0-69 µmol ZPP/mol heme |
Interpretive Data
For occupational exposure to lead, OSHA requires ZPP whole blood concentration to be reported in units of µg/dL. For adults, conversion of ZPP to units of µg/dL assumes a hematocrit of 45%. This test was performed on the ProtoFluor Z system manufactured by Helena Laboratories. The result is not comparable to results obtained from extraction-based methods or from the AVIV ZPP system.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the U.S. Food and Drug Administration. This test was performed in a CLIA-certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
Note
Elevated ZPP results are seen in early and late iron deficiency, the anemia of chronic disease, chronic lead poisoning, and erythropoietic protoporphyria. Elevated bilirubin or riboflavin and hemolyzed, clotted, or improperly aliquoted specimens may falsely increase the ZPP concentration.
Hotline History
CPT Codes
84202
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0020606 | Zinc Protoporphyrin (ZPP) WholeBld Ratio | 29763-0 |
0020613 | Zinc Protoporphyrin, Blood | 2895-1 |
Aliases
- ZP
- Porphyrins
- ZPP
- ZPP/Heme Ratio