Chemistry Reference
In-Depth Information
6.00E
+
05
R
(ohm)
5.00E
+
05
4.00E
+
05
3.00E
+
05
2.00E
+
05
3
1.00E
+
05
1
2
0.00E
+
00
-4
-2
0
2
4
6
8
Normalised
t
10.7
Resistance measured between two yarn electrodes implemented
in an electrochemical cell positioned at the leg of a human body
as a function of time. Sweat formation rate for (1) a diabetes
patient at the moment of low sugar level, (2) an athlete
exercising and (3) a diabetes patient walking in hot severe
conditions; arrow indicates the point at which the sugar level
becomes low.
sources that promote sweat formation. Results are shown in Fig. 10.7. Curve
1 is an example of the curves obtained from people who are suffering from
diabetes and were allowed (with close monitoring) to come very close to a
low sugar level in the blood. Intense perspiration occurs at a certain
moment, which is very well detected by the sensor system, with a decrease
of the cell resistance. However, analysing curve 2 and comparing it with
curve 1, it seems that in curve 2 the sweat formation is much more pro-
nounced. Curve 2 was obtained from an athlete during exercise and has
nothing to do with diabetes, and it is therefore clear that the sensor system
is not able to detect the difference between a curve obtained from a person
sweating normally and the one obtained for a diabetes patient who is enter-
ing the condition of low sugar level.
In addition, a pleasant walk in the sun during summer (303-308 K) will
result in a rate of sweat formation such that the system detects a large
decrease of the cell resistance. In view of these findings, the accuracy in
detection of a possible occurrence of low sugar level in the diabetes
patient's blood is poor or even undetectable. As an example, a laboratory
test was carried out with a diabetes patient walking under strict conditions
