{"id":"p-tau217-abeta42-ratio","name":"Plasma p-tau217 / Abeta42 Ratio (Lumipulse)","shortName":"p-tau217/Aβ42","aliases":["pTau217/AB42","p-tau217/Abeta42 Ratio","pTau217/Aβ42","pTau217/β-Amyloid 1-42 Plasma Ratio","Lumipulse G pTau217/β-Amyloid 1-42 Plasma Ratio","p-tau217/Abeta42","Lumipulse ptau217/Abeta42 Ratio","p-tau217/Aβ42 ratio","Plasma pTau217/Aβ42 ratio","pTau217/Abeta42 Plasma Ratio"],"abbreviations":["p-tau217/Aβ42","pTau217/AB42","pTau217/Abeta42"],"loinc":[{"code":"111517-9","primary":true}],"specimen":"calculated","units":[{"ucum":"{ratio}","display":"ratio"}],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A calculated ratio of two plasma proteins, p-tau217 divided by amyloid beta 42. A higher ratio makes amyloid build-up in the brain more likely.","url":"https://bloodtesttracker.com/markers/p-tau217-abeta42-ratio","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}