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Methodology: Spectrophotometry (S)
Edit Date: 3/17/2008
Performed: Daily
Released: 24-48 hours after setup at PeaceHealth Laboratories’ reference lab.
CPT Code: 82600-90
Specimen Collection Details
Collection: Draw only on Monday-Thursday. One 10 mL green top tube (sodium heparin). Do not use plasma separator tube (PST) or gel barrier tube. Lavender top tube (EDTA) can be used with disclaimer only.
Handling: Leave as whole blood; do not refrigerate or freeze.
Stability: 48 hours ambient if kept tightly capped. Specimen unstable refrigerated or frozen.
Standard Volume: 7 mL whole blood.
Minimum Volume: 2 mL whole blood.
Transport: Ambient.
Rejection Criteria: Clotted specimen; hemolysis; use of PST, SST, or gel barrier tube.

Normal: Potentially Toxic:
<20 ug/dL >50 ug/dL
Elevated values seldom indicate toxicity for patients on nitroprusside therapy.

PeaceHealth Laboratories