New and effective non-invasive test to measure blood glucose
New and effective non-invasive test to measure blood glucose
Those who coexist with diabetes need to accurately monitor blood glucose, to prevent complications related to the disease, such as heart attacks, blindness and coma. However, even the most bearable method among the most common to make these measurements continued, the prick in a finger, is painful and ends up representing a great annoyance for people who use it every day.
Researchers at the University of Missouri at Columbia and the Massachusetts Institute of Technology (MIT) at Cambridge, both institutions in the United States, recently evaluated the accuracy of a technology developed at MIT that relies on spectroscopy to monitor glucose levels. in blood without the traditional needles or with the aforementioned puncture in a finger. The first results show that this non-invasive technology measures blood glucose levels as effectively as a puncture test, without drawing blood.
In the study, the blood glucose levels of 20 healthy non-diabetic adults were measured before they drank a glucose-rich beverage. Their blood levels were then measured in successive intervals, over the following 160 minutes, using three methods: the aforementioned spectroscopic technique, blood analysis with classical intravenous extraction and blood analysis with a finger prick.
The tests were designed to determine how much glucose is left in the blood and whether the mechanisms of insulin regulation in a patient function effectively.
Prototype of the new device to non-invasively measure the level of blood glucose. (Photo: MIT)
After comparing the results of the analyzes, the team of Anandhi Upendran (researcher at the University of Missouri) found that the spectroscopic technique determined the glucose values as accurately as a finger puncture test.
Currently, blood glucose levels are measured through that prick on a finger or intravenously. The method studied by Upendran and his colleagues is non-invasive and uses a laser to monitor skin glucose levels. As Upendran warns, with diabetes on the rise, we are facing an urgent clinical need: to develop a precise, efficient and cheap alternative method to measure blood glucose levels.
The new device tested uses a technique called Raman spectroscopy to measure the chemical composition of the skin and determine the amount of glucose. A fiber optic cable attached to a wristband transmits a laser light on the skin to detect the different components of it, such as fatty tissue, proteins, collagen and glucose molecules. The wavelength fluctuations associated with the glucose present in the blood create a kind of molecular trace that can be used to find out their levels.
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