Find Locations
For hours, walk-ins and appointments.Test Includes
Microscopic examination for RBCs and WBCs, differential, and crystals; macroscopic examination for appearance and viscosity
Expected Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Documents
Specimen Requirements
Specimen
Synovial fluid
Volume
1 mL
Container
Lavender-top (EDTA) tube
Collection
Follow standard collection procedures.
Storage Instructions
Refrigerate. Transport to the laboratory as soon as possible.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | Unstable |
Refrigerated | 2 days (48 hours) |
Frozen | Unstable |
Freeze/thaw cycles | Unstable |
Causes for Rejection
Quantity not sufficient for analysis; improper labeling; specimen frozen; specimen more than 48 hours old; gel-barrier tube
Test Details
Use
This test is used to evaluate synovial fluid for the presence of RBCs, WBCs, crystals and for physical appearance.
Methodology
Microscopic and macroscopic examination
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 005231 | Cell Ct, Synovial w/Crystals | 005232 | Color, Fluid | 6824-7 | ||
| 005231 | Cell Ct, Synovial w/Crystals | 005233 | Clarity, Fluid | 9335-1 | ||
| 005231 | Cell Ct, Synovial w/Crystals | 005736 | Nucleated Cells, Synovial Fld | cells/uL | 55793-4 | |
| 005231 | Cell Ct, Synovial w/Crystals | 005512 | RBC, Fluid | /uL | 23860-0 | |
| 005231 | Cell Ct, Synovial w/Crystals | 019075 | Neut, Fluid | % | 12238-2 | |
| 005231 | Cell Ct, Synovial w/Crystals | 019091 | Lymphocytes, Fluid | % | 13941-0 | |
| 005231 | Cell Ct, Synovial w/Crystals | 019266 | Macrophages | % | 12230-9 | |
| 005231 | Cell Ct, Synovial w/Crystals | 019463 | Eosinophils, Fluid | % | 12209-3 | |
| 005231 | Cell Ct, Synovial w/Crystals | 019267 | Lining Cells, Synovial | % | 35651-9 | |
| 005231 | Cell Ct, Synovial w/Crystals | 005355 | Crystal,Synovial/Joint Fl | 6825-4 | ||
| 005231 | Cell Ct, Synovial w/Crystals | 019489 | Comments: | 20999-9 |
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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf