Version 2.74

Term Description

Polysomnography (PSG) is a type of sleep study used to diagnose, rule out, or adjust treatment for sleep disorders such as obstructive sleep apnea (OSA), narcolepsy, periodic limb movements, and REM behavior disorder. A sleep study measures sleep cycles and stages by monitoring biophysiological changes that occur during sleep. These changes are recorded using electrodes attached to the patient. Some of the parameters measured are: air flow in and out of the lungs, blood oxygen levels, body position, brain waves using an electroencephalogram (EEG), breathing effort and rate, electrical activity of the muscles using electromyogram (EMG), eye movement using electrooculogram (EOG), and heart rhythm using an electrocardiogram (ECG). Sleep studies track how often the patient stops breathing for at least 10 seconds (apnea) and how often breathing is partly blocked for 10 seconds (hypopnea). Results reported include the Apnea-Hypopnea Index (AHI). An AHI of less than 5 is considered normal. Normal results would also include normal patterns for brain waves and muscle movement.
Source: Regenstrief LOINC

Fully-Specified Name

Polysomnography study

Additional Names

Short Name
Polysomnography study

Basic Attributes

First Released
Version 2.00
Last Updated
Version 2.72
Change Reason
Release 2.72: COMPONENT: updated to reflect naming convention;
Order vs. Observation
HL7® Attachment Structure
No implementation guide exists

Member of these Panels

LOINC Long Common Name
26443-2 Clinical reports.non lab claims attachment
55168-9 Data Elements for Emergency Department Systems (DEEDS) Release 1.1

Language Variants

Tag Language Translation
es-AR Spanish (Argentina) informe del estudio:hallazgo:punto en el tiempo:^paciente:Documento:polisomnografía
pt-BR Portuguese (Brazil) Relatório:Achado:Pt:^Paciente:Doc:Polissonografia
Synonyms: Finding; Findings; Point in time; Random; PSG; Sleep study; Polysomnogram
nl-NL Dutch (Netherlands) polysomnografisch onderzoek:bevinding:moment:^patiënt:document:polysomnografie
Synonyms: PSG
it-IT Italian (Italy) Polisonnografia, studio:Osservazione:Pt:^Paziente:Doc:Polisonnografia
Synonyms: Clinico Osservazione paziente Punto nel tempo (episodio) Studio di polisonnografia
zh-CN Chinese (China) 多导睡眠脑电图检查:发现:时间点:^患者:文档型:多导睡眠图
Synonyms: Sleep apnea syndrome;多导睡眠图分析;多导睡眠图检查;多导睡眠图监测;多导睡眠监测;睡眠呼吸暂停(SAS);阻塞性睡眠呼吸暂停综合症 临床文档型;临床文档;文档;文书;医疗文书;临床医疗文书 医疗服务对象;客户;病人;病患;病号;超系统 - 病人 发现是一个原子型临床观察指标,并不是作为印象的概括陈述。体格检查、病史、系统检查及其他此类观察指标的属性均为发现。它们的标尺对于编码型发现可能是名义型,而对于叙述型文本之中所报告的发现,则可能是叙述型。;发现物;所见;结果;结论 多导睡眠脑电图(PSG、多导睡眠图、多导睡眠记录)检查 时刻;随机;随意;瞬间 检查分析 研究;检查项目;调查;考察;研究项目;学习 考察 调查
es-MX Spanish (Mexico) Informe de estudio:Tipo:Punto temporal:^ Paciente:Documento:Polysomnography

LOINC Terminology Service (API) using HL7® FHIR®

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