Beginning May 31st, 2023, the following Toxicology blood test’s reference range will be updated to reflect current best practices. Please refer to the Corewell Health Lab Test Directory for new reference ranges.
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Katherine Turner
Monoclonal gammopathies are characterized by the secretion of a monoclonal protein or M-protein. A wide variety of conditions can produce an M-protein, and the initial screening and monitoring of these patients require an array of tests. Herein we described best practices for protein electrophoresis ordering at Corewell Health.
Chemistry, General Information, Test Spotlight
Microalbumin/Creatinine, Random Urine Result Comment Update
Effective January 4, 2023, the process for reporting the Microalbumin/Creatinine ratio was changed for situations where one of the results, microalbumin and/or creatinine, is below or above the assay’s analytical measuring range (AMR).
Effective February 28th, 2023, Vitamin D 25-Hydroxy Level (25-OH Vitamin D) [LAB535] will be replaced by 25-Hydroxyvitamin Level D2 and D3 [LAB1230925]. Send out testing for 25-Hydroxyvitamin D2 and D3, Serum [LAB1230428] to Mayo will be discontinued. The testing methodology will change from an immunoassay to liquid chromatography-mass spectrometry.
The new test will include concentrations for
- 25-hydroxyvitamin D2
- 25-hydroxyvitamin D3
- 25-hydroxyvitamin D Total
As of July 19, 2022, in alignment with recommendations from the Center for Disease Control and Prevention (CDC) the reference range for blood lead testing has been updated from 5 mcg/dL to 3.5 mcg/dL.
This applies to both: Lead, Blood Level [LAB98] and Lead Screen Filter Paper [LAB2111119].
In addition, at this time the low end of reporting for Lead Screen Filter Paper [LAB2111119] has increased from 1 mcg/dL to 2 mcg/dL.
On January 24th, 2022 Rubella Antibody, IgG, Serum (LAB496) and Rubella IgG Antibody Quantitative (LAB3544) will be combined as LAB496 and moved to the Immunochemistry laboratory due to reagent constrains with the current vendor.
Testing will be available Monday-Friday with a turn-around-time of 1-3 days. Results will be reported qualitatively as Immune or Not Immune. If quantitative results are needed, please fax Immunochemistry at 616-267-2771 or call 616-267-2770.
Effective Wednesday, August 18, 2021, to align with Clinical and Laboratory Standards Institute (CLSI) guidelines, the Salicylate lower limit of reporting will increase from 0.3 mg/dL to 2.0 mg/dL.
Note: The therapeutic range for Salicylate is 2.0 – 10.0 mg/dL and this test is best utilized for assessment of Salicylate toxicity.
TEST INFORMATION
Salicylate Level – Test Codes: Epic #LAB34, Interface #10245, CPT #80329