When is blood used as a specimen?
Blood is the specimen of choice for most Clinical Chemistry studies, such as FBG (Fasting Blood Glucose), Bilirubin, BUN (Blood Urea Nitrogen), Uric Acid, and the list goes on and on....
Can blood be used to test Insulin levels?
In testing for Insulin levels, blood is the specimen of choice. The blood sample is drawn from a fasting patient, serum preferred and heparinized blood can be used.
In conjunction with testing for Insulin levels, Fasting Blood Glucose (FBG), Fasting Blood Sugar (FBS), Fasting Plasma Glucose (FPG), and Casual Plasma Glucose (CPG) are also done to determine the sugar level status or if the patient is diabetic or not. This is in relation that Insulin is a regulator of the blood sugar level. These tests make use of vein-drawn blood samples which are then placed in a red or grey-top.
Without any need for professional training, one can monitor his or her glucose level in your own personal home with the use of a portable blood glucose analyzer. The test is called Self- Monitoring of Blood Glucose (SMBG) Testing. Blood is still the specimen of choice for this test, but instead of a 5ml blood sample, only capillary blood is needed because it only needs a minute amount of blood. Capillary blood can be attained by doing a skin puncture on yourself with the use of an automatic lancet. Preferred puncture sites include: fingertips(preferred site), forearm, bicep area, palm of hand, and sometimes calf.
What collection tubes can be used to collect the blood for the Insulin and Glucose tests?
Red-topped tube --this contains no anti-coagulants, it can be used to prepare serum
Gray-topped tube --this tube contains potassium oxalate and sodium fluoride, this is preferred for glucose level testing & glucose tolerance levels
**the above photo shows the AUTHOR and OWNER of this blog, who definetely does NOT LOOK LIKE A SPLOG ;P, performing capillary puncture on a patient.
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