LP200585-0
a-wave amplitude
Active
Description
The a-wave is an electroretinographic measurement of the initial corneal-negative deflection, derived from the cones and rods of the outer photoreceptor layers. This wave reflects the hyperpolarization of the photoreceptors due to closure of sodium ion channels in the outer-segment membrane. Absorption of light triggers the rhodopsin to activate transducin, a G-protein, which leads to the activation of cyclic guanosine monophosphate phosphodiesterase (cGMP PDE) and eventually to a reduction in the level of cGMP within the photoreceptor. Reduction in cGMP leads to closure of the sodium ion channels, which results in a decrease of inwardly directed sodium ions, or hyperpolarization of the cell. The a-wave amplitude is measured from baseline to the trough of the a-wave. Source: Regenstrief LOINC
Basic Part Properties
- Part Display Name
- a-wave amplitude
- Part Type
- Component (Describes the core component or analyte measured)
- Created On
- 2015-10-07
- Construct for LOINC Short Name
- a-wave amp
LOINC Terminology Service (API) using HL7® FHIR® Get Info
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- CodeSystem lookup
- https:
//fhir.loinc.org/CodeSystem/$lookup?system=http: //loinc.org&code=LP200585-0
Language Variants Get Info
| Tag | Language | Translation |
|---|---|---|
| zh-CN | Chinese (China) | a-波振幅 Synonyms: a-波振幅（波幅、 |
| it-IT | Italian (Italy) | onda A ampiezza Synonyms: ampiezza dell''Onda A |
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