Sodium-Other
Label Mnemonic: NAO
Epic Lab Code: LAB902
Downtime Form: A-1a Miscellaneous Request
Chemistry
6240 RCP
356-3527
Specimen(s):
Body Fluid
(e.g., surgical drain, pericardial, peritoneal, peritoneal dialysis, pleural, or synovial)
Collection Medium:
Red top tube 5 mL (Clot Activator)
Minimum:
1 mL fluid in red top tube
Rejection Criteria:
Plasma, serum, urine, or cerebrospinal fluid.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
No established reference range (see Test Limitations)
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 sodium in cerebrospinal fluid, drain fluids, pancreatic fluid, pericardial fluid, peritoneal/ascites fluid, pleural fluid, and 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.
Methodology:
Ion selective electrode
CPT Code:
84302
 
See also:
Sodium, Plasma