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HelpTest Code FGHTP Ghrelin Total (Plasma)
Shipping Instructions
Ship Frozen
Specimen Required
Patient Preparation:
1. Patient should be fasting 10 to 12 hours prior to collection of specimen.
2. Patient should not be on any medications or supplements that may influence Cholecystokinin (CCK), Glucose, Growth Hormone, Insulin and/or Somatostatin levels, if possible, for at least 48 hours prior to specimen collection.
Supplies: Special ISI GI preservative plasma tube T125
Container/Tube:
Collection: Special ISI GI preservative plasma tube (T125).
Submission Container/Tube: Plastic vial
Specimen Volume: 3 to 5 mL
Collection Instructions:
1. Draw 10 mL of blood in special ISI GI preservative plasma tube (T125).
2. Centrifuge specimen in refrigerated centrifuge as soon as possible.
3. Send 3 to 5 mL plasma frozen.
Secondary ID
75898Method Name
Direct RIA
Reporting Name
Ghrelin TotalSpecimen Type
GI PlasmaSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| GI Plasma | Frozen | 180 days |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
| Specimens other than collected in GI Tube supply (T125) | Reject |
Clinical Information
Ghrelin is a novel 28 amino acid peptide derived by post-translational processes from a preproghrelin consisting of 117 residues, secreted by the stomach with specific receptors in the brain involved in appetite regulation. It conveys information to the brain thereby increasing appetite, food intake and body weight and influences the release of growth hormone. Ghrelin is a growth hormone-releasing peptide which acts as an endogenous ligand of the growth hormone secretagogue receptors (GHS-Rs). Ghrelin levels are inversely correlated with body weight and are higher during weight loss.
Reference Values
Normal weight/control subjects: 520-700 pg/mL
Obese subjects prior to diet: 340-450 pg/mL
8:00 am-12:00 pm: Up to 420 pg/mL
6:00pm: Up to 480 pg/mL
Obese subjects post induced
Weight loss: 450-600 pg/mL
8:00 am-12:00 pm: Up to 575 pg/mL
6:00 pm: Up to 600 pg/mL
Obese subjects post gastric-bypass surgery: Up to 120 pg/mL
Day(s) Performed
Monday through Friday
Report Available
5 to 9 daysPerforming Laboratory
Inter Science InstituteTest Classification
This test was developed and its performance characteristics determined by Inter Science Institute. Values obtained with different methods, laboratories, or kits cannot be used interchangeably with the results on this report. The results cannot be interpreted as absolute evidence of the presences or absence of malignant disease.CPT Code Information
83519
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FGHTP | Ghrelin Total | 76474-6 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| FGHTP | Ghrelin Total | 76474-6 |