Test Code LAB769 C1 Esterase Inhibitor, Functional, Serum
Specimen Required
Patient Preparation: Fasting, preferred but not required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Immediately after specimen collection, place the tube on wet ice.
2. After sample has clotted on wet ice, centrifuge at 4° C and aliquot serum into a plastic vial.
3. Freeze specimen within 30 minutes of centrifugation. Sample must be placed on dry ice if not frozen immediately.
NOTE: If a refrigerated centrifuge is not available, it is acceptable to use a room temperature centrifuge, provided the specimen is kept on ice before centrifugation and immediately afterward, the serum aliquoted and frozen.
Useful For
Diagnosing hereditary angioedema
Monitoring response to C1 esterase inhibitor replacement therapy
Reporting Name
C1 Esterase Inhib, Functional, SSpecimen Type
Serum RedSpecimen Minimum Volume
0.4 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Serum Red | Frozen | 28 days |
Reject Due To
Gross hemolysis | OK |
Gross lipemia | OK |
Gross icterus | Reject |
Heat-inactivated samples | Reject |
Reference Values
>67% normal (normal)
41-67% normal (equivocal)
<41% normal (abnormal)
Day(s) Performed
Varies
Report Available
3 to 5 daysSpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in RochesterCPT Code Information
83520
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
C1INF | C1 Esterase Inhib, Functional, S | 48494-9 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
C1INF | C1 Esterase Inhib, Functional, S | 48494-9 |