Version 2.78

Part Descriptions

LP97035-7   OCT
Optical coherence tomography (OCT) is a non-invasive imaging technique that provides an in vivo, cross-sectional view of the retina. There are 6 retinal layers viewable with OCT: the nerve fiber layer (NFL), the inner plexiform layer and ganglion cell layer (IPL+GCL), the inner nuclear layer (INL), the outer plexiform layer (OPL), the outer nuclear layer and photoreceptor inner segments (ONL+PIS), and photoreceptor outer segments (POS). OCT uses low-coherence interferometry to provide very accurate cross-sectional images. Two forms of OCT are time domain and spectral domain. Spectral domain has replaced the former because of its speed (20,000+ scans per second to avoid motion artifacts) and high resolution, and it can both visualize and measure the thickness of the retinal pigment epithelium and the nerve fiber layer adjacent to the optic disc. Source: Regenstrief LOINC

LP248912-0   Retinal nerve fiber layer
The RNFL is formed from expansion of the fibers of the optic nerve and extends to the interior surface of the retina. The RNFL is divided into 4 quadrants when measured in each eye - temporal, superior, nasal, and inferior. Each 90 degree quadrant is further divided into three 30 degree sectors ("clock hours"). RNFL measurements include the thickness of each quadrant and the thickness of each sector. The mean thickness of the entire RNFL for each eye is calculated based on the individual measurements. In patients with glaucoma, RNFL changes in the inferior quadrant are most closely associated with glaucoma status. In addition, superior visual field defects, which correspond to the inferior RNFL quadrant, are usually the first to appear. PMID: 10636409 Source: Regenstrief LOINC

Fully-Specified Name

Component
Retinal nerve fiber layer.clock hour 1 thickness
Property
Len
Time
Pt
System
Retina.left
Scale
Qn
Method
OCT

Additional Names

Short Name
L ret RNFL 1 o'clock thickness OCT

Basic Attributes

Class
EYE.OCT
Type
Clinical
First Released
Version 2.61
Last Updated
Version 2.68
Order vs. Observation
Observation

Member of these Panels

LOINC Long Common Name
86291-2 Retina Retinal nerve fiber layer panel by OCT

Language Variants Get Info

Tag Language Translation
es-MX Spanish (Mexico) Capa de fibras nerviosas de la retina Reloj hora 1 espesor:Len:Punto temporal:Retina izquierda:Cuantitativo:OCT
it-IT Italian (Italy) Strato delle fibre nervose della retina.spessore ore 1:Len:Pt:Retina.sinistra:Qn:OCT
Synonyms: Lunghezza Occhio Oftalmologia - Tomografia ottica a coerenza di f Punto nel tempo (episodio) Retina Sinistra Tomografia a coerenza ottica;TCO
zh-CN Chinese (China) 视网膜神经纤维层.1点钟位厚度:长度:时间点:视网膜.左侧:定量型:光学相干断层扫描术
Synonyms: Ⅰ I L LT 光学相干层析成像术;optical coherence tomography;OCT;光学相干断层成像术;光學相干斷層掃瞄;光学相干断层扫描;光学相干断层扫描成像术;光学相干断层扫描分析 厚 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 向左 向左侧 左 左侧（Left，LT，L） 左侧视网膜 左向 左边 时刻;随机;随意;瞬间 瑞叮醛;维生素 A 醛;维生素 A1 醛;视杆视色素;视醛;视黄素 眼;眼睛;眼科;眼科学与验光变量;眼科学与验光指标 眼科学与视力测定变量（眼科、眼）.光学相干断层扫描术（光学相干断层扫描、光学相干断层成像、光学同调断层扫描术、OCT） 视衣 长;长短

Example Units

Unit Source
um Example UCUM Units

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

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=86293-8