Islet Cell Dysfunction Test Group
Islet Cell Dysfunction Group 1
The proinsulin:insulin ratio may be useful in managing type 2 diabetic patients. High basal proinsulin:insulin ratio in noninsulin-dependent diabetic patients may predict acute beta-cell dysfunction.
Serum (preferred) or plasma, frozen
Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube
Under various protocols, the patient may be fasting and drawn, or fasting and drawn after a glucose load.
Separate serum or plasma from cells within 45 minute of collection. Send serum or plasma in a plastic transport tube. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Stable for 200 days. Stable at room temperature for six hours or refrigerated for 24 hours.
Quantity not sufficient for analysis