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Test Code 4010226 Crystal Exam, Polarized

Important Note

Because the anticoagulants found in other tubes can contribute to the formation of crystals, crystal exams should only be performed on samples from a plain red top tube.

Specimen Requirements

2.0 – 5.0 mL synovial fluid

Container

Plain red top tube

Minimum Volume

0.5 mL

Stability

Specimen should be analyzed as soon as possible after collection.

Reject Due To

Improperly labeled sample

Tube other than plain red top

Analytical Time

1 - 2 days
Preliminary result available same day

Sample Retention Time

7 days

CPT Code

89060

Method

Polarized Light Microscopy

Performing Laboratory

Springfield Hospital Laboratory