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Test Code LAB765 Viscosity, Serum

Additional Codes

SVISC


Specimen Required


Collection Container/Tube: Red top (serum gel/SST are not acceptable)

Submission Container/Tube: Plastic vial

Specimen Volume: 3 mL

Collection Instructions:

1. Keep specimen at 37° C (eg, 37° C Thermopak, heat block) until after centrifugation.

2. Centrifuge and aliquot serum into plastic vial.


Medical University of South Carolina Note:

After collection, Specimen needs to be sent on a warm pack

Secondary ID

610406

Useful For

Detection of increased viscosity

 

Monitoring patients with hyperviscosity syndrome

 

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

Medical University of South Carolina Note:

After collection, Specimen needs to be sent on a warm pack

Method Name

Capillary Measurement

Specimen Type

Serum Red

Specimen Minimum Volume

0.75 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  14 days
Medical University of South Carolina Note:

On-campus collections: Tube to 99 or deliver to University Extension Hospital Room EH318 
 
Off-campus collections: 
Centrifuge and aliquot within 2 hours.
Specimen to be stored/transported Refrigerated

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Reference Values

≤1.5 centipoises

Interpretation

Although viscosities greater than 1.5 centipoises (cP) are abnormal, hyperviscosity is rarely present unless the viscosity is greater than 3 cP.

Method Description

The Benson BV200 automated viscometer employs vacuum pressure through a capillary to measure the dynamic viscosity of serum samples. Samples at ambient temperature are aspirated by the sample probe, which is heated to 37° C. Viscosity results are calculated by the instrument at both 25° C and 37° C temperature points. Viscosity units on board the instrument are mPa.s (milli-pascal seconds), which is the International Standard (SI) unit for viscosity. Centipoise (cP) units are named after French physicist Jean Leonard Marie Poiseuille and are used in the centimeter-gram-second (CGS) system of units. 1 mPa.s is equal to 1 cP.(Instruction manual: BV200 Automated Clinical Viscometer User Manual. Benson Viscometers; Ver. 1.5, 02/2020)

Day(s) Performed

Monday through Friday

Report Available

1 to 3 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

85810

LOINC Code Information

Test ID Test Order Name Order LOINC Value
SVISC Viscosity, S 3128-6

 

Result ID Test Result Name Result LOINC Value
SVISC Viscosity, S 3128-6

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-Benign Hematology Test Request Form (T755)

-Hematopathology/Cytogenetics Test Request (T726)