Crystal ID, body fluid

Alphabetical Test listing

Crystal ID, body fluid-425

  
Crystal ID, body fluid
  
425
  
89060.0
  
XTL
  

To differentiate gout (sodium urate crystals) from pseudogout (calcium pyrophosphate crystals). These crystals are detected by polarized light microscopy with the addition of a first order red compensator that alters the passage of light into slow and fast components. The line on the compensator shows the vibration direction of the slower component. Sodium urates can be present in gout. The calcium pyrophosphates can be present in pseudogout.

 

  
Body fluid
  
2.0 mL
  
0.5 mL
  

Submit entire specimen

  
  

Lavender (EDTA), 4mL

A sample with no preservative is preferred for the crystal ID, however, if both a cell count and crystal ID is ordered and there is not enough sample, both tests can be performed off of an EDTA tube. 

  
  • Source
  

Refrigerated (strict) - 48 hrs

  
  • Improper label (unlabeled or mislabeled)
  • Clotted specimen
  • Delay in transport
  • Improper storage/transport temperature
  
AHL - Hematology: H
  
Daily
  
1 day
  

Polarized microscopic examination

  

No crystals seen

  
89060
  
11/30/2001
  
12/14/2020
  
12/14/2020