Elecsys® Phospho-Tau (181P) CSF

Robust and accurate biomarker tests to aid clinical decisions

Elecsys^® β-Amyloid (1-42) CSF II and Elecsys^® Phospho-Tau (181P) CSF are in vitro electrochemiluminescence immunoassays for the measurement of the β-Amyloid (1-42) (Abeta42) and Phospho-Tau (181P) (pTau181) protein concentrations in cerebrospinal fluid (CSF) from adult patients aged 55 years and older being evaluated for Alzheimer's disease (AD) and other causes of cognitive impairment to generate a pTau181/Abeta42 ratio value.¹

The Elecsys^® Phospho-Tau (181P) CSF assay is not intended to be used as a stand-alone test and should only be used with the Elecsys^® β-Amyloid (1-42) CSF II assay to calculate the ratio of phosphorylated Tau (181P) (pTau181) to β-Amyloid (1-42) (Abeta42) in CSF (pTau181/Abeta42 ratio).¹

The use of the Elecsys^® assays in the pTau181/Abeta42 ratio can detect amyloid positivity, enhancing diagnostic accuracy and physician confidence.^2,3

A positive pTau181/Abeta42 ratio result in CSF does not establish a diagnosis of Alzheimer's disease (AD) and should always be interpreted in conjunction with clinical information.¹

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The Power of Elecsys^® in Alzheimer’s disease

Robust, precise and accurate results to help ensure patients get the care they deserve

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References

Elecsys^® Phospho‑Tau (181P) CSF assay method sheet.
Rabinovici G.D. et al. (2019). Association of Amyloid Positron Emission Tomography With Subsequent Change in Clinical Management Among Medicare Beneficiaries With Mild Cognitive Impairment or Dementia. JAMA 321(13), 1286-1294.
Hansson O. et al. (2018). CSF biomarkers of Alzheimer’s disease concord with amyloid-β PET and predict clinical progression: A study of fully automated immunoassays in BioFINDER and ADNI cohorts. Alzheimers Dement 14(11), 1470-1481