This test requires a dedicated Sarstedt CSF liquor low protein binding tube sent directly to the testing facility.
5 - 8 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Cerebrospinal fluid (CSF)
Sarstedt CSF Tube 62.610.018. Tube provided by Labcorp by request.
Collect cerebral spinal fluid (CSF) in Sarstedt CSF Tube 62.610.018. Tube must be filled 50% to 80% minimum. Specimen must be collected in Sarstedt tube directly and cannot be transferred from a regular collection tube. If first 1 mL is hemolyzed, discard and continue to draw sample.
Refrigerate immediately (preferred), within 8 hours.
Freeze on arrival (at Labcorp).
Wrong tube type; not stored at proper temperature; quantity not sufficient; sample transferred from another tube; gross hemolysis
To indicate the ratio of beta-amyloid 42 proteins to beta-amyloid 40 proteins measured in the CSF to aid in the assessment of disease progression in patients with suspected or probable Alzheimer's disease.
Chemiluminescent enzyme immunoassay (CLEIA)
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|505560||Beta Amyloid 42/40 Ratio, CSF||98584-6||505542||Beta-amyloid 42||pg/mL||33203-1|
|505560||Beta Amyloid 42/40 Ratio, CSF||98584-6||505540||Beta-amyloid 40||pg/mL||70072-4|
|505560||Beta Amyloid 42/40 Ratio, CSF||98584-6||505543||Beta-amyloid 42/40||98485-6|
|505560||Beta Amyloid 42/40 Ratio, CSF||98584-6||505539||Interpretation:||N/A|
|505560||Beta Amyloid 42/40 Ratio, CSF||98584-6||505544||References:||N/A|
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