
2-16 Sensors and Sensor Technology
2.5 Conclusions
Implantable medical devices are widely employed to monitor or to control dierent physiological
pa
rameters
. Se
veral
im
plantable
me
dical
de
vices
ar
e
po
wered
by a ba
ttery,
wh
ich
co
nstitutes
a se
vere
li
mitation
be
cause,
in mo
st
ca
ses,
th
e
ba
ttery
de
nes
th
e
li
fetime
of th
e
en
tire
im
plantable
me
dical
de
vice;
in pa
rticular,
be
cause
of th
e
ba
ttery
di
scharge,
th
e
im
planted
sy
stem
mu
st
be su
rgically
re
placed
.
To ob
viate
th
is
pr
oblem,
th
e
im
plantable
me
dical
de
vice
sh
ould
be po
wered
th
rough
a te
lemetric
te
ch-
nique
or th
rough
an en
ergy-harvesting
sy
stem
im
planted
tog
ether
wi
th
th
e
de
vice
. Se
vera