Vasoactive Intestinal Polypeptide (VIP), Plasma
Method Description Describes how the test is performed and provides a method-specific reference
A radioimmunoassay technique is used. Highly purified synthetic human vasoactive intestinal polypeptide (VIP) obtained from Peninsula Laboratories is used as a standard and is also treated with Na-(125)I for use as a labeled antigen. Anti-VIP antibody is produced in rabbits to an antigen prepared by coupling natural VIP from the Karolinska Institute to bovine serum albumin. The antiserum obtained shows no crossreactivity to secretin, gastric inhibitory polypeptide, peptide histidine methionine, glucagon, and motilin up to and including concentrations of 10 ng/mL. (Yaksh TL, Michener SR, Bailey JE, et al: Survey of distribution of substance P, vasoactive intestinal polypeptide, cholecystokinin, neurotensin, metenkephalin, bombesin and PHI in the spinal cord of cat, dog, sloth, and monkey. Peptides 1988;9:357-372)
Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.
Monday, Wednesday; 1 p.m.
Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Performing Laboratory Location The location of the laboratory that performs the test