C4snvmcnc
Key facts at a glance
- LOINC
- 15165-4
- Short code
- C4SF
- Synonyms
- C4 Snv-mCnc
- Category
- chemistry
- Sample
- fluid
- Container
- Sterile, plain (red-top) tube or synovial fluid collection container without anticoagulants. Heparinized tubes may be used if specified by the laboratory. Transfer to appropriate aliquot tubes for transport.
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Immunonephelometry or Immunoturbidimetry
- CPT
- 86161
- SNOMED
- 39529009
- Specimen volume
- 0.5-1.0 mL of synovial fluid. Minimum 0.3 mL required for analysis. Larger volumes preferred when additional joint fluid studies (cell count, crystals, culture) are ordered simultaneously.
- Stability
- Room temperature: 2 hours. Refrigerated (2-8°C): 7 days. Frozen (-20°C or below): 30 days. Avoid repeated freeze-thaw cycles. Centrifuge specimen prior to analysis if turbid.
- Hemolysis max
- 300
- TAT
- 24–72 hours
- Order
- routine
Reference range
No established reference range for synovial fluid. Serum reference range typically 10-40 mg/dL may be used as general guidance, but synovial fluid values vary significantly and should be interpreted alongside clinical context.N/A
No special patient preparation required. Joint aspiration should be performed under sterile conditions by qualified healthcare personnel. Inform the clinician of any anticoagulant therapy or bleeding disorders prior to arthrocentesis.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy