As of September 1st, 2023, RBC cholinesterase testing will be discontinued, and serum cholinesterase testing methodology will be changing. Serum cholinesterase, also known as pseudocholinesterase or butyl cholinesterase, will continue to be available for testing. Serum cholinesterase results from the new method will be 60% higher, on average, versus prior results.
Read More - Discontinuation of RBC cholinesterase testing and change in serum cholinesterase testing