Version 2.80

Term Description

The term repersents The PrecivityAD2™ test. This test is an analytically and clinically validated blood test designed to assist healthcare providers in diagnosing Alzheimer's disease (AD) in patients with mild cognitive impairment or dementia. It quantifies specific plasma amyloid beta and tau peptides using liquid chromatography-tandem mass spectrometry (LC-MS/MS) to calculate the Aβ42/40 and p-tau217/np-tau217 ratios. These ratios are combined in a proprietary algorithm to produce the Amyloid Probability Score 2 (APS2), a numerical value from 0-100 that indicates the likelihood of brain amyloid plaques. By providing a non-invasive alternative to PET scans, the PrecivityAD2™ test enhances diagnostic accuracy while mitigating the effects of confounding factors.

Fully-Specified Name

Component
Amyloid plaques probability score
Property
Score
Time
Pt
System
Plas
Scale
Nom
Method
Calculation

Additional Names

Long Common Name
Amyloid probability score in Plasma by Calculation
Short Name
Amyloid prob score Plas Calc
Display Name
Amyloid plaques probability score Calc Nom (P)
Consumer Name Alpha Get Info
Amyloid plaques probability score, Blood

Example Answer List: LL6975-8

Answer Code Score Answer ID
PositiveCopyright http://snomed.info/sct ID:10828004 Positive (qualifier value) 48-100 LA6576-8
NegativeCopyright http://snomed.info/sct ID:260385009 Negative (qualifier value) 0-47 LA6577-6
Unable to perform testing LA34664-5

Basic Attributes

Class
SERO
Type
Laboratory
First Released
Version 2.79
Last Updated
Version 2.79 (ADD)
Order vs. Observation
Both

Formula (Readable)

The APS2 result is a composite score ranging from 0-100 that demonstrates the strongest correlation with brain amyloid pathology compared to the individual biomarkers (Aβ42/40 Ratio or p-tau217 Ratio) considered separately.

Language Variants Get Info

Tag Language Translation
el-GR Greek (Greece) Βαθμολογία πιθανότητας αμυλοειδών πλακών:Βαθμολογία:Pt:Πλάσμα:Nom:Υπολογισμός
Synonyms: Βαθμολογία
it-IT Italian (Italy) Punteggio di probabilità di placche amiloidi:Punteggio:Pt:Plasma:Nom:Calcolo
Synonyms: Plasma Punteggio di probabilità di placche senili Punto nel tempo (episodio) Sierologia (anticorpi e la maggior parte degli ant
zh-CN Chinese (China) 淀粉样蛋白斑块概率评分:评分:时间点:血浆:名义型:计算型肺部检查方法与测量手段
Synonyms: 分值;分数;得分 分值;得分;分数 分类型应答;分类型结果;名义性;名称型;名词型;名词性;标称性;没有自然次序的名义型或分类型应答 时刻;随机;随意;瞬间 淀粉样蛋白 淀粉样蛋白（淀粉状蛋白）斑块概率（可能性、几率、或然率）评分（分值、得分、分数、打分） 淀粉状朊 硫酸胶化纤维素 类淀粉物 胶化纤维素 血清;血清学;血清学检验项目;血清学检验项目 (非微生物学);血清学检验项目（非微生物学）;血清学检验项目类;血清学检验项目类 (非微生物学);血清学类;血清学类检验项目;血清学类检验项目 (非微生物学);血清学类试验;血清学类试验 (非微生物学);血清学试验;血清学试验 (非微生物学);血清学试验（非微生物学）;血清学试验类 (非微生物学);血清类 计算;计算型

Example Units

Unit Source
{score} 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=106939-2