KOH Prep (KOH)
Department: Microbiology
Test Synonym(s): LAB251, Potassium hydroxide prep, KOH
CPT Codes: 87210
Methodology: KOH prep
Reference Range: Negative for yeast and fungal elements
Tube Type: Sterile container
Specimen: Cornea, Hair, Skin, Nail
Temperature: Room temperature
Stability: Send to lab immediately
Reasons for Rejection: Non sterile or leaking container. Excessive delay in transport.
Days Performed: Daily
Times Performed: Continuous
TAT: 2-4 hours
Significance: KOH prep is not sensitive enough to rule out yeast and fungal organisms. Culture should be requested in addition to prep.
Special Instructions: For yeast and fungal elements.
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