Pathology Handbook

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Cholinesterase (Sendaway Test)

Alternative Names:

Pseudocholinesterase
Dibucaine Number
Fluoride Number

Laboratory:

Clinical Biochemistry

Test Code:

CRS

Specimen Types:

Serum
Plasma

Container Types:

SST
Lithium Heparin (with Gel)

Adults Volume or Mass:

5 mL

Collection & Request Instructions:

In cases where prolonged apnoea follows suxamethonium administration an assessment of atypical cholinesterase can be made using the Dibucaine and Fluoride Numbers. Such assessment should not be made until 24 hours after suxamethonium administration.

Avoid haemolysis.

Note Additional Collection Instructions:

Pathology Queensland prefer to receive BOTH a SST or Lithium Heparin Plasma specimen PLUS a 4 mL EDTA whole blood sample.(EDTA specimen must be sent unspun).

Transport Instructions:

Room Temperature

Assay Frequency:

Weekly

External Laboratory:

Pathology Queensland- RBWH Campus

External Transport Instructions:

Send at 4'C with Ice Pack