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SMOOTH MUSCLE AB
Test CodeLAB8037
Alias/See Also
- F-ACTIN
- f actin
CPT Codes
86256
Includes
Test includes titer
Preferred Specimen
Gold Tube (SST)

Patient Preparation
None
Minimum Volume
1 mL
Instructions
Centrifuge for complete separation of serum from red cells. Refrigerate until tested.
Transport Container
Gold Tube
Transport Temperature
Refrigerate
Specimen Stability
- 15-30°C up to 8 hours
- 2-8°C up to 2 days; otherwise freeze
Methodology
IFA
Setup Schedule
M, W, F
Batched; once per day run
Batched; once per day run
Report Available
Same day tested unless repeat testing is needed.
Reference Range
<1:20
Clinical Significance
Smooth muscle antibodies are detected in 85% of chronic active hepatitis cases and in < 50% of primary biliary cirrhosis cases. They are usually negative in extrahepatic biliary obstruction, drug induced liver disease, viral hepatitis and hepatoma.
Performing Laboratory
Alverno Central Lab