Lambert-Eaton syndrome

Alphabetical Test listing

Lambert-Eaton syndrome-994

Test name:

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

P/Q-Type Calcium Channel Ab

Tests included:

ACh Receptor (Muscle) Binding Ab,
P/Q-Type Calcium Channel Ab.

Reflex:

AChR Modulating Flow Cytometry, MuSK Autoantibody

Patient preparation information:

Patient should have no general anesthetic or muscle-relaxant drugs in the previous 24 hours.

Specimen type:

Serum

Collection container:

Gold serum separator (SST) tube

Volume:

3.0 mL

Minimum volume:

2.0 mL

Processing instructions:

Spin and separate

Transport container:

Screw cap transfer vial/tube (Mayo T914)

Alternate collection container:

Red serum vial/tube - 10 mL

Alternate processing instructions:

Spin and separate

Alternate transport container:

Screw cap transfer vial/tube (Mayo T914)

Transport and stability:

Refrigerated (preferred) - 28 days

Frozen - 28 days

Ambient - 72 hours

Specimen retention time:

28 days

Performing lab:

Mayo Clinic Laboratories (MGLE): R-NX

Days set up:

Mo - Fr

TAT:

3 - 11 days

Method:

Radioimmunoassay (RIA); Enzyme Immunoassay (EIA)

Reference ranges:

ACh Receptor (muscle) binding antibody: ≤0.02 nmol/L

ACh Receptor (muscle) modulating antibodies: 0-20% (reported as % loss of AChR)

N-type calcium channel antibody: ≤0.03 nmol/L

P/Q-type calcium channel antibody: ≤0.02 nmol/L

Striational (striated muscle) antibodies: <1:120

CPT codes:

83519 x 2

Additional CPT codes (if appropriate):
83519
86255

Date created:

07/17/2020

Revised date:

06/04/2021

Review date:

06/04/2021