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Cholinesterase Tests

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Also known as: CHS; AChE; RBC Cholinesterase; Red Cell Cholinesterase; BChE; Plasma Cholinesterase; Pseudocholinesterase; PCHE
Formal name: Erythrocyte Acetylcholinesterase; Butyrylcholinesterase
Related tests: Dibucaine Inhibition; Liver Panel

Were you looking instead for acetylcholinesterase testing of amniotic fluid for neural tube defects?

At a Glance

Why Get Tested?

  • To determine if you have been exposed to and/or poisoned by certain organophosphate chemicals found in pesticides; to monitor cholinesterase levels if you work with pesticides
  • Sometimes to identify individuals with inherited pseudocholinesterase deficiency before they are given anesthesia with the muscle relaxant succinylcholine or to help determine the cause of prolonged apnea after surgical anesthesia

When to Get Tested?

  • When you have symptoms of pesticide poisoning or on a regular basis when you are at risk of exposure to organophosphates, such as through work in the agriculture industry and/or frequent use of organophosphate insecticides
  • When you or a close relative have experienced prolonged apnea and muscle paralysis after use of the drug succinylcholine for a surgical operation

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?

None