Version 2.76

Part Descriptions

LP14752-7   pH
pH is a measure of the acidity or basicity of a solution. It is defined as the cologarithm of dissolved hydrogen ions (H+). Hydrogen ion activity coefficients cannot be measured experimentally, so they are based on theoretical calculations. The pH scale is not an absolute one, it is relative to a set of internationally established standard solutions. pH 7.0 is considered neutral. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See for details. Source: Wikipedia, pH

LP14752-7   pH
Potentia Hydrogenii, commonly known as pH, is a quantitative measurement of the acidity or basicity of a substance. A substance's pH value is based on a relative scale from 1-14 depending on the substance's proton ion concentration (H+). A higher proton ion concentration results in a lower pH value. Therefore, a pH value between 0 and 7 is an acidic substance whereas a pH value between 7 and 14 is an alkaline/basic substance. A pH value of exactly 7 is a neutral substance. [] The specific pH value of the blood is crucial in maintaining bodily functions. When the blood pH value is below normal range it is called acidosis. When the blood pH value is above normal range, it is called alkadosis. Acidosis/alkadosis can be divided into two categories: metabolic and respiratory. [] Source: Regenstrief LOINC

Fully-Specified Name


Additional Names

Short Name
pH BldA
Display Name
pH (BldA)
Consumer Name Alpha Get Info
pH, Blood

Basic Attributes

First Released
Version 1.0
Last Updated
Version 2.75
Order vs. Observation
Common Test Rank Get Info

Member of these Panels

LOINC Long Common Name
52743-2 Continuity Assessment Record and Evaluation (CARE) tool - Acute Care
52748-1 Continuity Assessment Record and Evaluation (CARE) tool - Home Health Admission
52746-5 Continuity Assessment Record and Evaluation (CARE) tool - Interim
52744-0 Continuity Assessment Record and Evaluation (CARE) tool - Post Acute Care (PAC) - Admission
52745-7 Continuity Assessment Record and Evaluation (CARE) tool - Post Acute Care (PAC) - Discharge
100847-3 Gas and ammonia panel - Arterial blood
93685-6 Gas and Carbon monoxide and Electrolytes panel - Arterial blood
24341-0 Gas and Carbon monoxide panel - Arterial blood
99548-0 Gas and electrolytes panel - Arterial blood
24336-0 Gas panel - Arterial blood
75885-4 IEEE 11073 Rosetta panel
62611-9 PhenX domain - Respiratory

Member of these Groups Get Info

LOINC Group Group Name
LG345-5 pH|LsCnc|Pt|ANYBldSerPl

Language Variants Get Info

Tag Language Translation
de-AT German (Austria) Synonyms: pH arteriell
de-DE German (Germany) pH:Logarithmische Stoffmengenkonzentration:Zeitpunkt:Blut arteriell:Semiquantitativ:
Synonyms: pH-Wert
es-AR Spanish (Argentina) pH:concentración de sustancia:punto en el tiempo:sangre arterial:cuantitativo:
es-ES Spanish (Spain) pH:LsCnc:Punto temporal:Sangre arterial:Semicuantitativo:
Synonyms: Semicuantitativo
es-MX Spanish (Mexico) pH:Concentración logarítmica molar:Punto temporal:Sangre arterial:Cuantitativo:
fr-FR French (France) pH:Log de concentration:Ponctuel:Sang artériel:Semi-Quantitatif:
fr-CA French (Canada) pH:LsCnc:Temps ponctuel:Sang artériel:Semi-Quantitatif:
it-IT Italian (Italy) pH:LsCnc:Pt:Sangue art:SemiQn:
Synonyms: Chimica Logaritmo della concentrazione molare Punto nel tempo (episodio) Sangue arterioso
ko-KR Korean (Korea, Republic Of) pH:물질농도:검사시점:동맥혈:정량:
nl-NL Dutch (Netherlands) pH:logaritmische molaire concentratie:moment:arterieel bloed:semikwantitatief:
pl-PL Polish (Poland) PH:stężenie logarytmowo-molowe:punkt w czasie:krew tętnicza:półilościowy:
pt-BR Portuguese (Brazil) pH:LsCnc:Pt:SgArt:Qn:
Synonyms: Log molar concentration; Point in time; Random; Blood; Blood arterial; ART; Bld art; Bld arterial; Blood art; Art blood; Art bld; AcG; Quantitative; QNT; Quant; Quan; Chemistry
zh-CN Chinese (China) pH:对数型物质的量浓度:时间点:动脉全血:半定量型:
Synonyms: 动脉血 化学;化学检验项目;化学检验项目类;化学类;化学试验;非刺激耐受型化学检验项目;非刺激耐受型化学检验项目类;非刺激耐受型化学试验;非刺激耐受型化学试验类 对数型克分子浓度;对数型克分子浓度(单位体积);对数型摩尔浓度;对数型摩尔浓度(单位体积);对数型物质的量浓度(单位体积) 时刻;随机;随意;瞬间 氢指数;氢离子指数;氢离子浓度;氢离子浓度倒数的对数;酸度;酸碱值;酸碱度

Example Units

Unit Source
[pH] Example UCUM Units

LOINC Terminology Service (API) using HL7® FHIR® Get Info

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