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Recommendations when to order or not order the test. May include related or preferred tests.
Detect antibodies for P/Q type and N-type voltage-gated calcium channels. Aid in the evaluation of muscle weakness in the context neuromuscular junction disorder with or without cancer, or the diagnosis of paraneoplastic neurological syndromes.
New York DOH Approval Status
Indicates test has been approved by the New York State Department of Health.
This test is New York state approved.
Specimen Required
Patient PreparationInstructions patient must follow before/during specimen collection.
CollectSpecimen type to collect. May include collection media, tubes, kits, etc.
Plain Red or Serum Separator Tube (SST).
Specimen PreparationInstructions for specimen prep before/after collection and prior to transport.
Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL to an ARUP Standard Transport Tube. (Min.: 0.2 mL)
Storage/Transport TemperaturePreferred temperatures for storage prior to and during shipping to ARUP. See Stability for additional info.
Refrigerated.
Unacceptable ConditionsCommon conditions under which a specimen will be rejected.
RemarksAdditional specimen collection, transport, or test submission information.
StabilityAcceptable times/temperatures for specimens. Times include storage and transport time to ARUP.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 month
Methodology
Process(es) used to perform the test.
Quantitative Radioimmunoassay (RIA)
Performed
Days of the week the test is performed.
Tue
Reported
Expected turnaround time for a result, beginning when ARUP has received the specimen.
2-9 days
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Test Number
Components
Reference Interval
N-Type Calcium Channel Antibody
69.9 pmol/L or less
P/Q-Type Calcium Channel Antibody
24.5 pmol/L or less
Interpretive Data
May include disease information, patient result explanation, recommendations, or details of testing.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Component
Interpretive Data
N-Type Calcium Channel Antibody
0.0 to 69.9 pmol/L: Negative 70.0 to 110.0 pmol/L: Indeterminate 100.1 pmol/L or greater: Positive
Voltage-Gated Calcium Channel (VGCC) Ab
0.0 to 24.5 pmol/L: Negative 24.6 to 45.6 pmol/L: Indeterminate 45.7 pmol/L or greater: Positive
Compliance Category
Laboratory Developed Test (LDT)
Note
Additional information related to the test.
Hotline History
N/A
CPT Codes
The American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
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