Effective 10/1/2025, 5 mL Pearl top tubes will no longer be utilized for high sensitivity troponin testing at Corewell Health East Laboratories. In lieu of pearl top tubes, 4 mL lavender top tubes will be the preferred tube type for High sensitivity troponin testing. Should a Pearl top tube be sent for high sensitivity Troponin testing, it will still be accepted and testing performed.
Testing effected:
High sensitivity Troponin I – LAB1231847
High sensitivity Troponin I Baseline – LAB1231498
High sensitivity Troponin I 2 Hour – LAB1231499
Current preferred tube:
5 mL Pearl Top-PPT EDTA Workday ITM-1128903 PPT Plasma Preparation K2
New preferred tube:
4 mL Lavender Top EDTA Workday ITM-1067701
NOTE: If other tests needing specimen collection in a 4 mL lavender top tube are ordered simultaneously with high sensitivity troponin, then a separate lavender top tube(s) will be required for those additional tests.
Any other testing will be cancelled, and the patient would need to be redrawn should only one lavender top tube be sent.
If you have questions, please contact your Corewell Health East Laboratory Customer Service Department:
Corewell Health Reference Lab Customer Service: 800.551.0488 or 248.551.1155, Option 5