| Laboratory: | Clinical Immunology | 
| Test Name: | 
			 C1 ESTERASE INHIBITOR FUNCTIONAL ASSAY - (S) 
	Test Code:
	CEIF, (MAYO TESTCODE: C1INF)
 
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| Clinical Information: | 
			
	 Complete the pre-approval form by clicking on the following link: 
		http://clients.intelex.com/DSManitobav5/dcDocumentRetrieveExt.asp?sAuth=5e452e805fc5ade05fbae9ab88f227850bb762a71e3575a51efd1362c4724f16&fromDcPublic=1&DocumentID=9467 Useful for diagnosing hereditary angioedema and for monitoring response to therapy.  | 
	
| Collection Devices: | 
			 Preferred Device:  
		
	
	
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| Specimen Required: | 
			
	 
			
				Blood: 5.0 mL
			
		 
		
				Serum: 1.0 mL
			 
			Collection Instructions: 1.  Immediately after specimen collection, place the tube on wet ice. 
			2. Centrifuge at 4°C and separate serum from clot. 3. Freeze specimen within 30 minutes.  | 
	
| Referral: | 
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| Requisition: | |
| Reference Values: | 
				
	 Functional  
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| Availability: | 
			 Within 2 Weeks 
			
				Restricted to Clinical Immunologists or by prior approval. 
			
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| See Also: | |
| More Information: | 
			
	 Mayo test ID:  C1INF 
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