Phosphorylated Tau 181 pTau181

Synonyms

pTau181

Allscripts (AEHR) Order Name

Phosphorylated Tau 181

Sunrise Clinical Manager (SCM) Order Name

Phosphorylated Tau 181, Plasma

EPIC Order Name

Phosphorylated Tau 181

Clinical Info

This test is used as an aid in the initial assessment for Alzheimer’s disease and other causes of cognitive decline in adult patients aged 55 years and older, presenting with signs, symptoms, or complaints of cognitive decline.

Specimen Type

Blood

Specimen Volume

1 mL  (Min Vol: 0.7 mL) (NOTE: This volume does NOT allow for repeat testing).        

Container

Lavender-top (EDTA) tube     

Collection Instructions

Plasma from EDTA lavender tube

This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample. 

Transport Instructions

Room Temp

Specimen Stability

ROOM TEMPERATURE: 14 days                                                     
REFRIGERATED: 14 days                                                     
FROZEN:  14 days

Methodology

Roche Diagnostics Electrochemiluminescence Immunoassay (ECLIA) 

Days Performed

TAT:3-6 Days

Performing Laboratories

• NWH CL Send Outs-Labcorp

CPT

84393

PDM

265899

Result Interpretation

Forms