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Test Code 5450 Viscosity, Serum

Additional Codes

Mayo Test ID

Reporting Name

Viscosity, S

Useful For

Detection of increased viscosity


Monitoring patients with hyperviscosity syndrome

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Serum Red

Specimen Required

Container/Tube: Red top

Specimen Volume: 1.5 mL

Collection Instructions: Keep specimen at 37° C (eg, 37° C Thermopak, heat block) until after centrifugation and separation of cells.

Barnes-Jewish Hospital Note:

Specimen Type: Serum

Container/Tube: Plain red top

Specimen Volume: 1 full tube
Collection Instructions: Prewarm tube to 37° C


Collection Procedure:
Hospital Patient:

Obtain prewarmed tube and prewarmed blue, insulated bag from Barnes-Jewish Hospital Chemistry Laboratory or North Campus Laboratory.

1. Draw specimen using 1 prewarmed tube.
2. Immediately place into prewarmed insulated bag and zip closed immediately.
3. Deliver immediately to Chemistry Laboratory.
Additional Information:

1. Temperature of specimen must be between 32° C to 42° C upon receipt. Specimens not received at proper temperature will be rejected.
Non Hospital Patient:
Call Barnes-Jewish Hospital Laboratory Customer Service at 314-362-1470 prior to collection for processing instructions.

Specimen Minimum Volume

0.65 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Refrigerated (preferred) 14 days
  Ambient  14 days
  Frozen  14 days

Reference Values

≥16 years: ≤1.5 centipoises

Reference values have not been established for patients that are <16 years of age.

Day(s) and Time(s) Performed

Monday through Friday; Continuously until 2 p.m.

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

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


Result ID Test Result Name Result LOINC Value
8168 Viscosity, S 3128-6

Method Name

Sonoclot Coagulation Analyzer


If not ordering electronically, complete, print, and send the following form with the specimen:

Hematopathology/Cytogenetics Test Request Form (T726) (

Barnes-Jewish Hospital Additional Information:

For BJH Laboratory Use Only

Laboratory Processing Instructions:
BJH Chemistry will forward to the performing laboratory.