One 5 mL gold (SST) top tube.

1 mL serum refrigerated (Min: 0.5 mL).

* Collection Instructions *

• Centrifuge serum specimens within 1 hour of collection.
• Transfer serum to sterile transport tube.
• Delayed separation of the serum can result in spuriously high levels of lysozyme, presumably because of the breakdown of leukocytes.

Ambient: 24 hours

Refrigerated: 15 days

Frozen: 18 days

• Moderate to gross hemolysis
• Grossly lipemic
• Room temperature samples older than 24 hours
• Plasma collected in citrate or heparin