What is the role of urine microscopy in the diagnosis of ethylene glycol (EG) toxicity?

Updated: Dec 05, 2017
  • Author: Daniel C Keyes, MD, MPH; Chief Editor: Sage W Wiener, MD  more...
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Other tests that may be useful depending on the clinical status of the patient include electrocardiography (ECG). Use of a Wood's (ultraviolet) lamp has been discussed above. Urine microscopy may be useful for identifying calcium oxalate crystals, as noted above. However, calcium oxalate crystals do not develop in the urine for about 4-8 hours following ingestion and if significant renal insufficiency develops, they may not be present for 40 hours following the ingestion. [10]

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