The decision as to
whether to get one of these monitors
depends on the value to the wearer of knowing his or her readings on a minute-by-minute basis. For people
early in the course of diabetes,
on oral medications, and in
good control, they are probably not necessary. For peo- ple on insulin, with a history of low and high readings,
especially if they are hard to predict or explain, the
information provided by
continuous glucose sensing may be very valuable.
However, approval for insurance coverage is often limited to specific circumstances, such as the frequent occurrence of very high or low blood sugars that cannot otherwise be prevented.
Thursday, June 7, 2012
Should I get one of the new continuous glucose monitors?
There are now three types of continuous glucose mon- itors available. They all transmit glucose results wire- lessly from a small sensor placed just beneath the skin via a transmitter
whose signal is received by
the mon- itor placed anywhere from 5 to 10 feet away. Results are sent from every minute to every 5
minutes and the trend of the readings
can be shown on graphs.
One, the Medtronic Realtime System®, can transmit the results into
the same unit that is used as the insulin pump. However, even though the same unit acts as both mon- itor and pump, it is still necessary for the wearer to
pro- gram and set the amount of insulin to be delivered. Studies have shown that the additional information provided by the frequently delivered
values and the graphed trends reduces high and low glucose events in the wearer by about half. It is important to note that all
the
current continuous glucose monitors are approved only for use with and alongside
conventional glucose meters.
This means that before acting on the informa- tion the continuous
monitor provides, you should verify it by obtaining a reading with your regular monitor. Also, the two technologies provide similar but slightly different information. The conventional monitor
mea- sures blood glucose from the blood droplet resulting
from the finger prick. The continuous meter does not use blood.
Instead, it measures the glucose level in the fluid bathing the tissue under the skin. This is in fact derived from the blood plasma
itself, but it takes several minutes to adjust to reflect the blood level. The avail- able continuous
meters need to be calibrated
twice daily (Medtronic
Guardian®,
Dexcom 7®) with a conven- tional fingerstick reading, although the newer Abbott Freestyle Navigator® needs only four calibration readings.
features are important
to different
individuals, depending on their needs. Probably the best way to answer this question is to discuss some of the
available
features. Size is
one of
the first
that springs to
mind. Monitors
have been getting
ever
Labels:
Diabetes
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