Test Code KOH Potassium Hydroxide (KOH) Preparation, Other
Performing Location
Specimen Collection Information
| Specimen | Min. Test Volume | Collection Container | Special Handling |
|---|---|---|---|
| Varies; exudates, fluids, hair, nails, skin scrapings, etc. | Sterile, leak-proof container or culturette swab, as applicable |
Reference Ranges & Critical Values
| Assay | Gender | Age Range | Normal Range | Critical Values | Units |
|---|---|---|---|---|---|
| KOH | ALL | 0 Minutes – 150 Years | No fungal elements seen |
Collection Instructions
BODY FLUIDS/TISSUE SPECIMENS:
- Submit specimen in sterile, leak-proof container.
- For suspected fungus in CSF specimens, see procedure for "Cryptococcal Antigen Detection/India Ink Examination".
EXUDATES:
- Aspirate pus from ulcer or lesion with sterile syringe, or absorb exudate into cotton swab.
- Place specimen into a 0.5 mL sterile saline vial.
GENITAL SPECIMENS:
- Aspirate discharge or absorb vaginal/cervical exudate into cotton swab.
- Place specimen into a 0.5 mL sterile saline vial.
HAIR SAMPLES:
- Examine patient's hair or beard for broken hairs, crusted areas, or short hairs with gray, dusty appearance.
- Pluck out 10-12 hairs with forceps or several with scalpel (infected hairs are easily removed). Place in sterile, dry container.
NAIL SAMPLES:
- Look for thickened or discolored areas under edges or at nail borders.
- Wash with alcohol pledget; let dry.
- Scrape debris from infected area with scalpel into sterile, dry container.
ORAL SPECIMENS:
- Split a tongue blade in half longitudinally, or use other suitable sterile scraper.
- Scrape lesion vigorously.
- Place blade in sterile, dry container.
PHARYNGEAL SPECIMENS:
- Obtain a dual swab and remove swab from transport tube.
- Use tongue depressor to hold down patient's tongue so that the throat is well exposed and illuminated.
- Vigorously rub both swabs over the back of the throat, both tonsils, and any areas of inflammation, exudation, or ulceration.
- AVOID touching the tongue, cheeks, or lips with the swabs.
- Replace swabs into Culturette; DO NOT CRUSH AMPULE
SKIN SAMPLES:
- Wash skin with alcohol wipe and let dry.
- Use sterile scalpel blade to obtain scrapings from the margin of an active lesion.
- Place scrapings into a sterile dry container.
SPUTUMS:
- If possible, have patient rinse mouth and gargle with water prior to specimen collection.
- Instruct patient to cough DEEPLY into sterile, leak-proof container.
- Saliva and/or postnasal discharge are NOT suitable.
Day(s) Performed
Monday - Sunday
CPT
87210
LOINC
680-9