Difference between revisions of "Crystals in body fluids"

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Images:
Images:
*[http://www.stpetes.org/html/pointofcare/Procedures/Blue%20(Addition).jpg Crystals - schematic (stpetes.org)] from [http://www.stpetes.org/html/pointofcare/Procedures/crystals.html Microscopic examination for crystals in synovial fluid (stpetes.org)].</ref>
*[http://www.stpetes.org/html/pointofcare/Procedures/Blue%20(Addition).jpg Crystals - schematic (stpetes.org)] from ''[http://www.stpetes.org/html/pointofcare/Procedures/crystals.html Microscopic Examination for Crystals in Synovial Fluid (stpetes.org)]''.
*[http://library.med.utah.edu/WebPath/COW/COW197.html Blue rhomboid CPPD crystals (med.utah.edu)].
*[http://library.med.utah.edu/WebPath/COW/COW197.html Blue rhomboid CPPD crystals (med.utah.edu)].



Revision as of 03:18, 24 September 2010

This article deals with crystals in body fluids.

Joint crystals

Types:[1]

  • Gout = needle-shaped, negatively birefringent, yellow when aligned.
  • Pseudogout = rhomboid-shaped, positively birefringent, blue when aligned.

Notes:

  • Pseudogout also known as CPPD = calcium pyrophosphate dehydrogenase.
  • Memory device: ABC+ = aligned blue is calcium & cuboid - positively birefringent.

Images:

Urine crystals

Types:

  • Envelope shape (calcium oxalate).
  • Diamond shape (uric acid).
  • Coffin-lid shape (struvite).
  • Hexagonal shape (cysteine).

Notes:

  • Memory device: Diamonds are see-through; ergo, uric acid stones not seen on KUB.
  • Uric acid crystals: usually dissolve in formulin... but do not dissolve in alcohol.[2]

See also

References

  1. TN05 RH6
  2. WG. 8 January 2010.