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8767M
PSEUDOCHOLINESTERASE, DIBUCAINE INHIBITION, SERUM

Test Code 8767M 
Test PSEUDOCHOLINESTERASE, DIBUCAINE INHIBITION, SERUM 
Methodology Colorimetric, Kinetic 
Description Includes pseudocholinesterase, total.
Useful for identifying patients who are homozygous for the atypical gene and have low levels of pseudocholinesterase (PCHE) which are not inhibited by dibucaine, or for identifying patients who are heterozygous for the atypical gene, have lower than normal levels of PCHE, and varying levels of inhibition with dibucaine. 
Specimen Draw blood in either a plain, red-top tube or serum gel tube. Spin down and send 1.0 mL (minimum: 0.3 mL) of serum refrigerated.

NOTE:
1. For cases of prolonged apnea following surgery, wait 24 hours before obtaining specimen.
2. PATIENT'S AGE AND SEX ARE REQUIRED ON REQUEST FORM FOR PROCESSING. 

Reference Values DIBUCAINE INHIBITION
70 - 90%
Congenital deficiency: 18 - 20%

TOTAL
Males: 3,100 - 6,500 U/L
Females
< 18 years: not established
18 - 49 years: 1,800 - 6,600 U/L
>= 50 years: 2,550 - 6,800 U/L 

Analytic Time 1 Day 
Day(s) Test Set Up Monday through Sunday 
CPT Code(s) 82480  PCHE, total
82638  PCHE, dibucaine inhibition