NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.
Direct Radioimmunoassay (RIA)
Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name
Somatotropin Release-Inhibiting Factor FORWARD
Somatotropin Release-Inhibiting Factor FORWARD
Specimen Type Describes the specimen type needed for testing
Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.
Collect 10 mL of blood in special tube containing G.I. Preservative (MML supply number T125). Specimen should be separated and 3 mL plasma frozen as soon as possible.
1) Patient should be fasting 10-12 hours prior to collection.
2) Patient should not be on any antacid medication or medications that affect insulin secretion or intestinal motility, if possible, for at least 48 hours prior to collection.
Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.
Specimens other than
Anticoagulants other than
Special GI preservative (MML supply T125)
Warm reject; Cold reject
Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.
|GI Plasma||Frozen||180 days|
Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Somatostatin is a cyclic peptide originally isolated from sheep hypothalami
and shown to inhibit the release of Growth Hormone. Somatostatin is present
primarily in three main forms: a 14 amino acid peptide, a 28 amino acid peptide
(Big Somatostatin), and a 12,000 molecular weight Pro-Somatostatin. This
assay measures only the 14 amino acid form of Somatostatin. All three forms
of Somatostatin have similar biological properties and overall potencies.
Somatostatin is a physiological regulator of islet cell and gastrointestinal functions,
and is a suppressor of many pituitary hormones including Growth Hormone, Prolactin,
and Thyrotropin (TSH). Somatostatin levels are often elevated in diabetics, but the
levels return to normal upon correction of the hormonal and metabolic deficiencies
present. In many cases of APUDomas including VIPoma, Insulinoma, Glucagonoma,
and Gastrinoma, elevated levels of Somatostatin are found.
Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Up to 25 pg/ml
This test was developed and its performance characteristics
determined by Inter Science Institute. It has not been cleared or
approved by the US Food and Drug Administration. The FDA
has determined that such clearance or approval is not necessary.
Test Performed by: Inter Science Institute
944 West Hyde Park
Inglewood, CA 90302
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 through Friday
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
Performing Laboratory Location The location of the laboratory that performs the test
Inter Science Institute
Test Classification Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer's instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR), Investigation Use Only (IUO) product, or a Research Use Only (RUO) product.
This test was developed and its performance characteristics determined by Inter Science Institute. It has not been cleared or approved by the US Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary.
CPT Code Information Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Medical Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
LOINC® Code Information Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the result codes returned for this test or profile.
|Result ID||Reporting Name||LOINC Code|
|Z0933||Somatostatin, (Plasma)||In Process|