(e.g., surgical drain, pericardial, peritoneal, peritoneal dialysis,
pleural, or synovial)
|Red top tube 5 mL (Clot Activator)
1 mL fluid in red top tube
Plasma, serum, urine, or cerebrospinal fluid.
24 hrs/day, 7 days a week, including holidays.
1 hour (upon receipt in laboratory)
No established reference range (see Test Limitations)
This test is not approved by the FDA for this sample type. Performance
characteristics and reference range have not been verified. A
published study using Roche Diagnostics cobas 8000 analyzers has
demonstrated that analysis of urea nitrogen in vitreous fluid shows no
evidence of systematic matrix interference. Results should be
interpreted in conjunction with clinical findings.
Reference: Owen WE et al. Body fluid matrix evaluation on a Roche
cobas 8000 system. Clinical Biochemistry 2015; 48(13-14):911-914.