Cell Count, Synovial Fluid With Crystals

CPT: 89051; 89060
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Test Details

Test Includes

Microscopic examination for RBCs and WBCs, differential, and crystals; macroscopic examination for appearance and viscosity

Use

Evaluate synovial fluid for the presence of RBCs, WBCs, crystals, and for physical appearance

Methodology

Microscopic and macroscopic examination

Specimen Requirements

Specimen

Synovial fluid

Volume

1 mL

Container

Green-top (heparin) tube (preferred) or lavender-top (EDTA) tube. The lavender-top (EDTA) tube is not preferred for crystal exam.

Storage Instructions

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

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 Polys, 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 % 35477-9
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 © 1994-2017, 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