General Information, Test Utilization

Influenza Testing Recommendation (November 2022)

Influenza cases numbers are currently increasing throughout West Michigan. Influenza prevalence guides the most appropriate testing approach and sufficient prevalence has now been reached for influenza rapid antigen testing (e.g. Sofia instrument) to have improved performance. The use of rapid antigen testing as a screening method during high prevalence reduces both the cost to the patient and turn-around-time as compared to lab-based molecular methods. Rapid antigen tests generally have high analytical specificity, but lack the sensitivity of nucleic acid amplification methods (e.g. PCR). For this reason, PCR testing is still recommended for hospitalized patients and for outpatients with a negative antigen result if influenza is still suspected and if the result will impact clinical decision making.

Low Influenza
prevalence
High influenza
prevalence
Recommended order Influenza PCR (LAB3255) Influenza Rapid Antigen (LAB2111530)
or
Influenza PCR (LAB3255)

TEST INFORMATION

Test name Epic code Interface EMR Code CPT Code
 Influenza PCR  LAB3255 11594 87502
 Influenza Rapid Antigen  LAB2111530 11208 87804 x4
General Information, Hematology

Update: Complete Blood Count (CBC)

Starting November 29th, 2022, Corewell Health West, Hematology Laboratories will begin reporting absolute counts for white blood cell (WBC) manual differentials, in addition to relative (percentage) counts. The WBC differential count determines the number of each type of white blood cell present in the blood. It can be expressed as a percentage or as an absolute value. Of these, the absolute value is much more important than the relative value, given that clinically relevant WBC elevations and declines are defined by their absolute numbers, not by their relative proportions, and there is potential for error if this conversion is performed outside the laboratory. Continue Reading

General Information, Toxicology

Update: Meconium Drug Testing

Effective November 21, 2022, the following changes will be made to Meconium Drug Testing (LAB479).

  1. The cutoff for positivity for the opiate drug class (codeine, morphine, hydrocodone, hydromorphone, oxycodone, and oxymorphone) will increase to 20 ng/g from 10 ng/g.
  2. The format of reporting will be updated to include discrete reporting fields for all tested analytes. Positive results will no longer be denoted via comments.

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General Information

Regionals New Test Communication: “4-Plex”

Effective immediately, the following Regional Hospital Laboratories have the 4-Plex (COVID-19, Influenza A, Influenza B, RSV) test available for ordering and testing:

  • Big Rapids Hospital Laboratory
  • Blodgett Hospital Laboratory
  • Gerber Hospital Laboratory
  • Ludington Hospital Laboratory
  • Pennock Hospital Laboratory
  • Reed City Hospital Laboratory
  • United/Greenville Hospital Laboratory
  • Zeeland Hospital Laboratory

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Advanced Technology Laboratory, General Information, Molecular Diagnostics

Test Update: Chlamydia and Gonococcus Testing (Alinity m)

Effective October 31, 2022, the Advanced Technology Laboratory’s Molecular Diagnostics Department will accept oropharyngeal and rectal swab specimens as testing sources for Chlamydia and Gonococcus testing using the Alinity m multi-Collect Kit. This specimen type is FDA approved on the Alinity m platform.

NOTE: Specimens collected on patients under the age of 14 or collected for Child Protective Services, will still be sent out to a reference laboratory. Continue Reading