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The page below is a sample from the LabCE course The Urine Microscopic: Microscopic Analysis of Urine Sediment. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Identification of Crystals

Identification of crystals found in the urine sediment requires knowledge of the urinary pH.

Large crystals are identifiable under low power. High power magnification is required for smaller crystals.
Most crystals can be identified by morphology alone. Urine pH and reagent strip results can provide supporting information. If further examination is necessary birefringence and solubility characteristics should be examined.