Glucagon (Sendout)

Useful For:

• Diagnosis and follow-up of glucagonomas and other glucagon-producing tumors
• Assessing diabetic patients with problematic hyper- or hypoglycemic episodes (extremely limited utility)

Patient Preparation: Patient should be fasting (8 hours) prior to collection.

Enzyme-Linked Immunosorbent Assay (ELISA)

Note: As of 06/02/2025, Mayo Clinic Laboratories has updated the Glucagon methodology. If patient is undergoing serial monitoring of Glucagon levels, rebaselining by requesting that this sample also be run on the previous assay method for comparison purposes is recommended. Rebaseline of this sample at no charge will be available temporarily and the rebaseline result will be added to the report. Contact Mayo Clinic Laboratories at 800−533−1710 to request this service.

Collection Instructions:

1. Pre-chill a LAVENDER TOP (EDTA) tube by placing on wet ice.
2. Draw 5 mL blood into the pre-chilled tube.
3. After drawing, place tube back into wet ice and transport immediately to the laboratory.

Outside Laboratories: Centrifuge sample in a refrigerated centrifuge. Immediately after centrifugation, aliquot plasma to a separate plastic vial and freeze plasma at -20°C. Transport on dry ice.

Stability: Frozen: 90 days; Refrigerated: Unacceptable; Ambient: Unacceptable.

Reject Due To: Gross hemolysis. Gross lipemia and gross icterus: Acceptable.

Centrifuge sample in a refrigerated centrifuge. Immediately after centrifugation, aliquot plasma to a separate plastic vial and freeze plasma at -20°C.

Sendouts:

• Order Mayo Test: GLP
• Interfaced: Yes [Interface: 601; Worksheet: MAFZ]

Stability: Frozen: 90 days; Refrigerated: Unacceptable; Ambient: Unacceptable.

Reject Due To: Gross hemolysis. Gross lipemia and gross icterus: Acceptable.