PSEUDOCHOLINESTERASE

Specimen Required
Draw blood in a SST. Allow sample to clot completely at room temperature. Separate serum from cells within 2 hours of collection. Send 0.5 mL serum (0.1 mL minimum) refrigerated in a screw-capped plastic vial. Sample must be drawn prior to surgery or more than two days following surgery. Do not draw in recovery room. (EDTA plasma acceptable if removed from cells within two hours.) Plasma values slightly lower than serum.

Alternate Specimen
Plasma: EDTA, K2EDTA, heparin (sodium or lithium)

Rejection Criteria
Hemolyzed specimens

Methodology
Enzymatic

Stability
Room Temperature: 4 hours; Refrigerated: 7 days; Frozen: 3 months

Reference Range
2,900-7,100 U/L

Performed
Monday-Friday

Turnaround Time2-5 days
Test CodePSE
CPT-4 Code (s)
82480
LOINC Codes
2098-2

Warde
Medical
Laboratory