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Test Code C1INF C1 Esterase Inhibitor, Functional, Serum


Specimen Required


Patient Preparation:

Fasting: 8 hours, 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 Serum

Collection Instructions:

1. Immediately after specimen collection, place the tube on wet ice and allow specimen to clot.

2. Centrifuge at 4° C and aliquot serum into a plastic vial.

3. Within 30 minutes of centrifugation, freeze specimen. Specimen 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.


Specimen Type

Serum Red

Specimen Minimum Volume

Serum: 0.4 mL

Specimen Stability Information

Specimen Type Temperature Time
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 days

Specimen Retention Time

14 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

83520