Viscosity, Serum

Message

Sendout, Mayo test code: SVISC

Test Code

LAB765

Alias/See Also

Serum Viscosity

CPT Codes
85810

Preferred Specimen

3 mL serum from a red tube. SERUM GEL TUBE IS UNACCEPTABLE.

Minimum Volume

0.75 mL

Instructions

1. Keep specimen at 37 degrees C (eg, 37 degrees C Thermopak, heat block) until after centrifugation.
2. Centrifuge and aliquot serum into plastic vial.

Transport Container

Plastic vial

Transport Temperature

Refrigerated

Specimen Stability

Refrigerated (preferred): 28 Days
Frozen: 28 Days
Ambient: 14 Days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis: OK
Gross lipemia: OK
Gross icterus: OK

Methodology
Capillary Measurement

FDA Status
Approved

Setup Schedule

Monday through Friday

Report Available

2-4 days

Limitations

Failure to follow specimen handling instructions may cause false-low results.

Hyperviscosity syndrome may not be present even if the viscosity is greater than 3 centipoises.

Reference Range

> or =16 years: < or =1.5 centipoises (Reference values have not been established for patients that are <16 years of age.)

Clinical Significance

Detection of increased viscosity

Monitoring patients with hyperviscosity syndrome

This test is not useful for patients with small concentrations of monoclonal proteins.

Performing Laboratory
Mayo Clinic Laboratories, Rochester, Minnesota

Additional Information
Viscosity, Serum

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.