Effective February 7, 2024, at 7:30 AM, Corewell Health West Laboratories will go live with a new reference range for the calculated Anion Gap (AG). The AG reference range will be adjusted to align with recent reference range studies.
The following will be the new normal reference ranges for AG:
Anion Gap: 5 – 14 mmol/L
Effective December 20, 2023, Rheumatoid Factor, IgM, Quantitative will be replaced with Rheumatoid Factor.
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 September 13, 2022, in line with current trends, the lab will be adopting the new estimated glomerular filtration rate (eGFR) equations developed by Inker et al.
After consultation with our clinical partners, Spectrum Health West Michigan Laboratory will be adjusting the pediatric reference ranges for our new ALT and AST reagents in an effort to better serve our population. Numerous academic studies were reviewed, and the values listed below were adopted on August 3, 2022:
Effective August 2, 2022, reference ranges for the below tests will be updated to better align with the vendor’s recommendation and with Spectrum Health Lakeland Laboratory. Please click on the links below and scroll to the Reference Range field to see the updated ranges.
• Lithium Level [LAB29]
• PTH Intact [LAB108]
• IgM Level [LAB72]
• IgA Level [LAB73]
• CA 125 Level [LAB155]
• C4 Complement Level [LAB151]
• C3 Complement Level [LAB152]
• Albumin Level [LAB45]
• Transferrin Level [LAB133]
Questions or inquiries may be directed to the “Contact Us” link above.
In order to prevent Biotin interferences several endocrine oriented tests have been updated, see test information below.
Folate (aka Folic Acid) is a test that requires the patient to be fasting in order for the results be accurate. Results are falsely elevated if the patient is not fasting. Spectrum Health Laboratories recently updated our system to hard stop a test from being collected if the patient is not fasting. Please remind your patients to fast 8 hours prior to having their blood drawn.
Spectrum Health Laboratories recommends:
• No caloric or caffeine intake for 8-12 hours prior to testing. Do not eat or drink anything except normal amounts of plain water. This also includes no smoking, chewing gum, candy, cough drops, etc.
• Take normal dosages of medications unless the provider has instructed otherwise.
Click here for a list of tests the require or recommend fasting.
Go Live Date delayed to 3/3/2022
Go-Live Date: 3/2/2022
Due to new instrumentation at Spectrum Health Blodgett Hospital Laboratory (BIRL) and to standardize across the Spectrum Health system, we will be adopting new tests for AST and ALT. The difference between our current test and this new test is the addition of the co-factor pyridoxal phosphate (Vitamin B6). The new test is the recommended test of the International Federation of Clinical Chemistry and ultimately will provide our patient population more accurate AST and ALT results. We did not adopt the new test in the past because it came with logistical and stability issues that made its use in the lab difficult. The new instrumentation we obtained has solved some of these concerns.
Historically, if patients had a Vitamin B6 deficiency, their AST and ALT levels may have been falsely lower than the true values. This decrease was due to the lack of endogenous co-factor causing a slower reaction rate when we tested the patient sample. After we implement the new test across the system, you may notice an increase in your patient’s AST and ALT results. This increase may be evidence that your patient had some degree of Vitamin B6 deficiency. If you were trending results, we recommend you establish a new baseline with the new test versions. The lab has been changed slightly in EPIC to prevent trending between the two test versions, since the results may not be able to be correlated if your patient had a Vitamin B6 deficiency.
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.