644-5
LaboratoryMicroscopic observation [Identifier] in Skin by KOH preparation
Definition
A KOH Preparation involves treating a specimen with KOH, a strong base that can make fungi and yeast more visible by partial dissolution of tissue cells, keratin, and other material. Fungal cells are resistant due to the high content of cellular chitin. KOH prep is generally a test for fungi, most often candida yeast, but others too, such as tinea capitis and other skin or nail fungal infections, even blastomycosis, etc. However, the KOH prep is also used to diagnose infections with mites (Demodex folliculorum in rosacea-like lesions and Sarcoptes scabiei in hyperkeratotic or crusted scabies) and sometimes even nematodes (in blue neck syndrome). [PMID:16766846]
LOINC 6-Axis Classification
Component
Observation
Property
Prid
Time Aspect
Pt
System
Skin
Scale Type
Nom
Method Type
KOH preparation
Details
Class
MICRO
Order/Observation
Both
Short Name
KOH Prep Skin
Display Name
Microscopic observation KOH prep Nom (Skin)
Related Names
Frequently Asked Questions
What is LOINC code 644-5?
LOINC code 644-5 identifies "Microscopic observation [Identifier] in Skin by KOH preparation". A KOH Preparation involves treating a specimen with KOH, a strong base that can make fungi and yeast more visible by partial dissolution of tissue cells, keratin, and other material. Fungal cells are resistant due to the high content of cellular chitin. KOH prep is generally a test for fungi, most often candida yeast, but others too, such as tinea capitis and other skin or nail fungal infections, even blastomycosis, etc. However, the KOH prep is also used to diagnose infections with mites (Demodex folliculorum in rosacea-like lesions and Sarcoptes scabiei in hyperkeratotic or crusted scabies) and sometimes even nematodes (in blue neck syndrome). [PMID:16766846]
What does 644-5 measure?
This code measures Observation in Skin. It belongs to the MICRO class in the LOINC classification.
What is LOINC?
LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.