Phospho-Tau 217, Plasma (Sendout)

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General Information

Lab Name
Phospho Tau 217, Plasma (Sendout)
Lab Code
RPT217
Epic Name
Phospho-Tau 217, Plasma (Sendout)
External Test Id
PT217
Description

Useful For: Evaluation of individuals, aged 50 years and older, presenting with cognitive impairment who are being assessed for Alzheimer disease and other causes of cognitive decline.

Ordering Guidance:

  • This assay should not be ordered for individuals younger than 50 years or in cognitively unimpaired individuals regardless of age.
  • This test is not intended as a screening test for Alzheimer disease in asymptomatic individuals.

Ordering Requirements: Pre-approved for the UW Medicine Memory & Brain Wellness Center. Orders from other locations require Laboratory Medicine Resident (LMR) approval.

Note: This is the non-orderable sendout battery included in package Phospho-Tau 217, Plasma (Sendout) [RP217G].

Synonyms
Alzheimer disease, PhosphoTau217, PT217, pTau217
Components
Code Name
RP217R Phospho Tau 217, Plasma
RP217I Phospho Tau 217 Interpretation

Interpretation

Method

Chemiluminescent Enzyme Immunoassay

Reference Range
See individual components

Ordering & Collection

Specimen Type
Blood
Collection

Collect 4 mL blood in LAVENDER TOP (EDTA) tube

Quantity
Requested: 0.6 mL EDTA plasma plus 0.5 mL additional plasma for UW443
Minimum: 0.5 mL EDTA plasma

Processing

Receiving Instructions

Centrifuge sample and transfer plasma into two separate aliquots. If sample volume is low, prioritize the sendout test (RPT217).

  • RPT217: Aliquot 0.6 mL plasma into a screw-cap vial and place sample in the Refrigerated Mayo Sendouts Rack.
  • UW443: Aliquot 0.5 mL plasma into a separate plastic vial and place sample in the -70°C UCGEN/Chemistry rack.
    • For samples collected at other locations: freeze samples prior to transport and send to UW-MT with the next Cross Hospital batch.

Sendouts:

  • Order Mayo Test: PT217
  • Interfaced: Yes [Interface: 601; Worksheet: MARF]

Stability: Refrigerated (preferred): 7 days; Frozen: 7 days; Ambient: 72 hours.

Misc Sendout

Performance

Lab Department
Sendouts Mayo Lab (RF)(MARF)
Frequency
Stability: Refrigerated (preferred): 7 days; Frozen: 7 days; Ambient: 72 hours.
Available STAT?
No
Performing Location(s)
Sendout Mayo Clinic Laboratories (Superior Drive)
800-533-1710

3050 Superior Drive NW
Rochester, MN 55901

Billing & Coding

CPT Codes
84393
LOINC
19146-0