LOINC
Version 2.67

32109-1Phenytoin Free [Moles/volume] in Serum or PlasmaActive

Part Descriptions

LP14731-1   Phenytoin.free
Phenytoin-free levels detect the level of non-protein-bound phenytoin in the blood. It is used to measure therapeutic and toxic levels of the drug. Source: Regenstrief Institute

LP207910-3   free DRUG/TOX
The measurement of free (unbound) drug concentrations in plasma is important for certain drugs and has two advantages over measurement of total concentration: (1) the free concentration is independent of changes in plasma binding (e.g., due to changes in albumin), and (2) the free concentration is more directly related to both the efficacy and toxicity of the drug [PMID: 6636249] . For most drugs and the majority of patients, measuring the free and total concentrations is not necessary. However, for certain drugs, including some anticonvulsants and antibiotics, and specific patient populations, such as critically ill or immunosuppressed patients, the free concentration is a better indicator of therapeutic effect and potential toxicity. Source: Regenstrief LOINC

Fully-Specified Name

Component
Phenytoin.free
Property
SCnc
Time
Pt
System
Ser/Plas
Scale
Qn
Method

Additional Names

Short Name
Phenytoin Free SerPl-sCnc
Display Name
Phenytoin Free [Moles/Vol]

Basic Attributes

Class
DRUG/TOX
Type
Laboratory
First Released
Version 2.07
Last Updated
Version 2.34
Order vs. Observation
Observation
Common SI Lab Results Rank
1581

Member of these Panels

LOINC Long Common Name
54037-7 HEDIS 2009 panel
57820-3 HEDIS 2010 panel
60442-1 HEDIS 2011 panel
67767-4 HEDIS 2012 panel
72199-3 HEDIS 2013 panel
74234-6 HEDIS 2014 Value Sets

Member of these Groups

LG47569-5 Phenytoin.free|Pt|Ser/Plas

Language Variants Get Info

zh-CNChinese (CHINA)
苯妥英.游离型:物质的量浓度:时间点:血清/血浆:定量型:
nl-NLDutch (NETHERLANDS)
fenytoïne.vrij:mol/volume:moment:serum of plasma:kwantitatief:
et-EEEstonian (ESTONIA)
Fenütoiin.vaba:SCnc:Pt:S/P:Qn:
fr-BEFrench (BELGIUM)
Phénytoïne.libre:Concentration de substance:Temps ponctuel:Sérum/Plasma:Quantitatif:
fr-CAFrench (CANADA)
Phénytoïne.libre:Concentration de substance:Temps ponctuel:Sérum/Plasma:Quantitatif:
fr-FRFrench (FRANCE)
Phenytoin.free:SCnc:Pt:Ser/Plas:Qn:
fr-CHFrench (SWITZERLAND)
S--phénytoïne libre
de-DEGerman (GERMANY)
Phenytoin.frei:SKnz:Pkt:Ser/Plas:Qn:
de-CHGerman (SWITZERLAND)
S--Phenytoin, freie
it-ITItalian (ITALY)
Fenitoina.libera:SCnc:Pt:Siero/Plasma:Qn:
it-CHItalian (SWITZERLAND)
S--fenitoina libera
ko-KRKorean (KOREA, REPUBLIC OF)
유리페니토인:물질농도:검사시점:혈청/혈장:정량:
pt-BRPortuguese (BRAZIL)
Fenitoína.livre:SCnc:Pt:Sor/Plas:Qn:
ru-RURussian (RUSSIAN FEDERATION)
Фенитоин.свободный:МолКонц:ТчкВрм:Сыв/Плаз:Колич:
es-ARSpanish (ARGENTINA)
fenitoína.libre:concentración de sustancia:punto en el tiempo:suero/plasma:cuantitativo:
es-ESSpanish (SPAIN)
Fenitoína libre:Concentración de sustancia:Punto temporal:Suero o Plasma:Qn:
es-CHSpanish (SWITZERLAND)
S--fenitoina libre
tr-TRTurkish (TURKEY)
Fenitoin.serb:SubKons:Zmlı:Ser/Plaz:Kant:

Example Units

Unit Source
umol/L eCHN
umol/L Example UCUM Units
umol/L Original Submission

LOINC FHIR® API Example - CodeSystem Request Get Info

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=32109-1