The testing for insulin level should be performed along with glucose level. Insulin is a hormone that helps transport glucose from blood into the tissue. Glucose is necessary for energy functions of the cells. Decreased glucose within the cells will lead to starvation of the cells.
In type I diabetes, generally the insulin levels are decreased, which results in increased glucose level in blood and decreased transport of glucose into the cells. In type II diabetes, there is an insulin resistance, which leads to decreased transport from the blood into the tissues. Individuals with insulin resistance would have high levels of insulin, in their blood.
The Insulin Blood Test is usually ordered jointly with glucose levels and C-peptide levels tests. They are usually ordered when an individual has hypoglycemic (very low blood sugar) symptoms, such as:
Both the insulin and C-peptide levels (tests) are also performed together to determine, whether the insulin is due to an endogenous source (produced within the body) or from an exogenous source (injected by an external source).
Specimen required: Blood
Process: The blood sample is collected using a syringe inserted into a superficial vein of the arm.
Preparation required: Generally an 8-hour fasting is necessary, before the blood sample is collected.
Significance of an Insulin Blood Test:
The laboratory test results are NOT to be interpreted as results of a "stand-alone" test. The test results have to be interpreted after correlating with suitable clinical findings and additional supplemental tests/information. Your healthcare providers will explain the meaning of your tests results, based on the overall clinical scenario.
Certain medications that you may be currently taking may influence the outcome of the test. Hence, it is important to inform your healthcare provider, the complete list of medications (including any herbal supplements) you are currently taking. This will help the healthcare provider interpret your test results more accurately and avoid unnecessary chances of a misdiagnosis.
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