June 2024: Test Update – Vasoactive Intestinal Polypeptide (VIP), Plasma

Immediate Test Change

Test Update – Vasoactive Intestinal Polypeptide, Plasma (VIP)

Effective June 27, 2024.

Beginning June 27, 2024, Vasoactive Intestinal Polypeptide, Plasma (VIP) will be sent to a different reference laboratory due to issues with the current reagent manufacturer.

Refer to the table below for an outline of testing changes.

Please contact Client Services with any questions or for assistance.

Test Change Overview

Vasoactive Intestinal Polypeptide, Plasma (VIP)

Additional patient preparation information for the new test:
Patients must fast for 10-12 hours and avoid antacid medications or medications that affect intestinal motility for at least 48 hours before collection.

New Test

Old Test

Performing Laboratory

Mayo Clinic Laboratories



Enzyme-linked immunosorbent assay (ELISA)

Radioimmunoassay (RIA) 

Specimen Collection

Plasma, 1 mL

Lavender K2EDTA tube

Plasma, 1 mL

PPACK tube

Minimum Volume

0.5 mL

0.5 mL

Transport Temperature

Critical frozen


Reference Interval

0-36 pg/mL

0-60 pg/mL 

Turnaround Time

6-10 days

4-8 days 

Vendor Test Information