BD Vacutainer LH (Lithium Heparin) 102 I.U. Plus Blood Collection Tubes, Catalog Number 368886
False elevation of carboxyhemoglobin (COHb) results have been reported when using venous blood gas samples collected with tubes analyzed with the IL GEM 4000 instrument.
Worldwide Distribution, including US Nationwide
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-2310-2019