Carboxyhemoglobin

Analytes Tested

Carboxyhemoglobin

Methodology

Co-oximetry (blood-gas analyzer)

Assay Availability

Mon. – Fri.

Results Reported

Typically, positive, quantitative reports ≤ 5 business days TAT from receipt.

Acceptable Matrices

Whole Blood; 1 x 4 mL Heparin (green top; preferred) tubes.

Storage

Stored at 4oC until testing is completed. Long term storage of samples (1 year) is stored at -20oC.

Causes for Rejection

• Identifiers on the specimen DO NOT match, when compared with the requisition.
• Specimen handling has compromised the integrity of the specimen (e.g., not stored, or prepared according to testing requirements; frozen specimens and specimens fixed/processed in alternative fixatives)
• Specimen quality is compromised at or beyond ability to complete testing and provide accurate results (i.e., quality not sufficient [QNS]).
• Serum-separated or plasma specimens.