Homocysteine

CPT Code(s):

  • 83090

Preferred Specimen:

1 mL serum

Minimum Volume:

0.5 mL

Special Instructions:

Red-top tubes (no gel): Place the specimen in a refrigerator or ice bath for 30 minutes after collection. Centrifuge the specimen as soon as possible after complete clot formation. Transfer the serum to a plastic specimen transport tube. Mark the specimen type as serum on the transport tube.Barrier gel separator tubes: Place the specimen in a refrigerator for 30 minutes after collection. Do not place barrier tubes in an ice bath as freezing may prevent the barrier gel from adequately separating from cells. Centrifuge specimen as soon as possible after complete clot formation, ensuring that the barrier gel completely separates serum from cells. Note: It is very important to centrifuge and separate serum or plasma from red blood cells as soon as possible to avoid falsely elevated results.

Patient Preparation:

Fasting for at least 8 hours is preferred

Transport Container:

Plastic screw-cap vial

Transport Temperature Name:

Room temperature

Specimen Stability Components:

  • Room Temperature: 4 days
  • Refrigerated: 7 days

Testing Schedule:

Daily

Methodology:

CHEMILUMINESCENCE

Reference Range:

3.70 Ð 13.90 umol/L

Reject Criteria:

Gross hemolysis ¥ Unseparated serum or plasma ¥ Whole blood specimens

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Genesis