If one has too much sugar or glucose in his blood, then it can cause diabetes. So to make sure that the blood glucose levels in the blood are normal, regular checkups are needed. Blood glucose meters are useful for this purpose. These meters are manufactured keeping in mind the need for precision and accuracy. Since the early inception of these meters when it used to take up to two minutes to calculate the blood sugar level, the meters have evolved significantly, becoming smaller and faster, taking only 5 seconds to give the result. The research work on these meters has been done by medial institutes and monitored, regulated and tested by institutes like a Japanese CRO.

There has been a change in the technology used in the devices of today. The modern blood sugar meters follow an electrolytic method. There are some test strips incorporated which suck the blood up from the patient’s body. Then the sugar in the blood starts reacting with the glucose oxidase that is present in the enzyme electrode. Some oxidants acting as mediator reagents help to oxidize the enzyme again. These oxidants are generally complex ions like ferricyanide and osmium bipyridyl. A reaction occurs at the electrode which helps in the re-oxidation of the mediator. Ultimately, this concept is used to measure the amount of sugar present in the blood – the quantity of charge that is generated at the electrode is taken as proportional to the amount of blood sugar that reacted with the enzyme to create that charge.

Institutes like a Japanese CRO will make sure that the accuracy of the equipment is very high, which is usually recommended to be kept at no lower than 20% and ideally at around 85%. There are plenty of other electronic parts in modern blood sugar meters, irrespective of whether they follow the coulometric method or the amperometric method. These parts include operational amplifiers, digital to analog converters and vice versa, modulators and delay chips.

Once again, statistical analyses and testing of these instruments are carried out by organizations like the Japanese CRO.