Specimen Age

LOINC codes: 49546-5
Tests that measure Specimen Age: Quest Diagnostics 1

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, Neutrophil Function, Oxidative Burst 37523

Population	Interval
%Oxidation Pos Neutrophils, 24 Hours	≥93%
%Oxidation Pos Neutrophils, 48 Hours	≥83%
%Oxidation Pos Neutrophils, 72 Hours	≥82%

Quest Diagnostics test catalog, 37523

Tests

Check the catalog code, specimen, method and preparation for every test that measures Specimen Age. Select up to five tests to compare them side by side.

Quest Diagnostics 1 test

Panels that include this biomarker

Neutrophil Function, Oxidative Burst 37523
2 analytes · Blood · Fasting not stated · Turnaround Set up: Daily (a.m.); Report available: 2-3 days
Method and collection
Method
Flow Cytometry (FC)
Collection
Specimen must arrive at the referral laboratory within 72 hours of collection in order to meet sample stability requirements. Specimens are accepted <72 hours post collection. No other preservatives are acceptable. Specify time of day specimen was collected. Clients may send 4 mL whole blood in sodium heparin from a healthy donor unrelated to the patient, drawn at the same time as the patient sample to run in parallel with the patient's specimen. The outermost label of the tube must be clearly labeled as "Transport Control". If the draw date is not indicated on the specimen, the client must be called and this information obtained. Clients: Contact the lab prior to ordering for special logistics arrangements. PSC: Follow short stability Protocol. Test available by prior arrangement only. Special sample collection and transportation arrangements must be made prior to ordering the test. Contact your local Customer Service Department for specific instructions. Submit Monday-Thursday only. Do not draw the day before a holiday. Draw the specimens prior to the last FedEx pick up. Make arrangements with FedEx in advance for same day pick up. Collect and label the specimen(s) according to test requirements. Place the specimen(s) and paperwork into the short stability specimen kit. Use one kit per patient. Use the pre-printed FedEx shipping airbill (provided with the kit) for FedEx Express overnight shipment to Quest Diagnostics Nichols Institute in San Juan Capistrano, CA. Request Item #170903 Samples received >72 hours after collection will be rejected. Date and time of draw are required and must be provided.
Quest Diagnostics catalog page

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Sources

Quest Diagnostics test catalog
1 test: codes, specimens, methods, preparation and reference intervals.
LOINC 49546-5
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for Specimen Age
Registered studies that measure Specimen Age, on the U.S. National Library of Medicine registry.

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

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