Thrombus detection in the artificial heart pump based on electrical impedance spectroscopy
IEEE Sensors Journal,
Год журнала:
2024,
Номер
24(11), С. 18372 - 18381
Опубликована: Апрель 18, 2024
Heart
disease
is
one
of
the
major
diseases
threatening
people's
lives
and
health.
The
development
artificial
heart
pumps
has
eased
shortage
transplanted
hearts.
However,
natural
formation
thrombus
in
deeply
limits
its
further
development.
How
to
precisely
detect
been
an
urgent
research.
This
study
focuses
on
high
incidence
VADs,
or
ventricular
assist
devices,
potential
dangers
that
arise
from
thrombus,
including
harm
human
body.
employs
pump
as
a
model
investigate
impact
variables
such
thickness,
area,
blood
concentration,
sedimentation
time
flow
through
pump.
By
analyzing
this
data,
we
aim
prevent
pipeline
blockages
impeller
rotation
obstructions
caused
by
formation.
Results
showed
impedance
increased
11.6379
Ω
14.4971
thickness
0
mm
8
mm.
diameters
annular
were
40.47
mm,
50.38
60.76
respectively,
electrical
values
15.4150
Ω,
15.9288
16.4748
Ω.
concentration
22%
58%,
value
29.3137
90.0740
After
20
minutes
sedimentation,
37.3680
37.6949
with
increase
time.In
case,
contains
area
are
linearly
related
resistance.
Experimental
results
good
agreement
simulation
results.
research
presents
detection
method
based
spectroscopy,
which
holds
significant
importance
practical
application
realm
preventing
for
Язык: Английский
Field‐based adipose tissue quantification in sea turtles using bioelectrical impedance spectroscopy validated with CT scans and deep learning
Ecology and Evolution,
Год журнала:
2022,
Номер
12(12)
Опубликована: Дек. 1, 2022
Loss
of
adipose
tissue
in
vertebrate
wildlife
species
is
indicative
decreased
nutritional
and
health
status
linked
to
environmental
stress
diseases.
Body
condition
indices
(BCI)
are
commonly
used
ecological
studies
estimate
mass
across
populations.
However,
these
have
poor
predictive
power,
which
poses
the
need
for
quantitative
methods
improved
population
assessments.
Here,
we
calibrate
bioelectrical
impedance
spectroscopy
(BIS)
as
an
alternative
approach
assessing
studies.
BIS
a
portable
technology
that
can
body
composition
from
measurements
widely
humans.
technique
requires
calibration
using
reference
method.
Using
sea
turtles
model
organisms,
propose
protocol
computed
tomography
(CT)
scans,
with
prediction
equation
being:
(kg)
=
-
(-0.03
[intercept]
0.29
*
length
Язык: Английский
Towards Tomato Plant Iron Stress Monitoring Through Bioimpedance and Circuit Analysis
Опубликована: Сен. 25, 2023
Insufficient
availability
of
essential
nutrients,
such
as
iron,
can
impede
plant
growth,
decrease
crop
productivity,
and
even
lead
to
mortality.
This
is
why
it
crucial
detect
early
signs
stress
prevent
yield
loss,
via
proximal
monitoring
techniques.
In
this
study,
stem
impedance
8
tomato
plants
was
measured
each
1
hour
monitor
the
impact
iron
stress.
The
normalized
magnitude
at
10
kHz
continuously
over
38
days.
results
reveal
a
noticeable
divergence
in
trend
shortly
after
elimination
from
nutrient
solution,
indicating
effect
on
bioimpedance.
Additionally,
Cole
model
employed
evaluate
electrical
parameters
spectra.
fitting
exhibited
an
average
root
mean
square
error
466.3
Ω.
Statistical
analysis
extracted
circuit
revealed
significant
differences
between
iron-stressed
control
plants,
highlighting
their
potential
relevant
features
for
discriminating
health
conditions.
Our
findings
highlight
usefulness
measurements
provide
insights
into
physiological
responses
deprivation.
Язык: Английский
Adipose tissue estimation of foraging and nesting green turtles Chelonia mydas using bioelectrical impedance analysis
Endangered Species Research,
Год журнала:
2023,
Номер
51, С. 127 - 142
Опубликована: Апрель 21, 2023
Adipose
tissue
is
the
main
energy
store
in
sea
turtles
and
fluctuates
response
to
dietary
conditions
external
stressors.
Monitoring
programmes
commonly
use
body
condition
indices
(BCIs)
infer
nutritional
health
status
of
turtle
populations.
However,
BCIs
have
poor
predictive
power
for
estimating
adipose
tissue.
We
introduce
bioelectrical
impedance
analysis
(BIA)
as
a
portable
technique
estimate
green
Chelonia
mydas
.
The
aims
this
study
were
on
Great
Barrier
Reef
(Australia),
examine
whether
more
sensitive
indicator
than
BCI.
Turtles
(n
=
250)
sampled
at
3
foraging
sites
nesting
beach
with
differing
levels
anthropogenic
impact.
Differences
tissue,
Fulton’s
BCI,
mass
across
life
stages
assessed
by
conducting
linear
mixed
effects
models.
BIA
estimates
mean
revealed
significant
differences
sampling
sites,
that
not
found
using
BCI
data.
Mean
was
estimated
be
4.6
±
0.6%
(%
SD)
correlated
(1.2
0.1).
reduced
high
level
Adult
had
significantly
higher
values
juveniles
subadults.
females
measured
during
shortly
before
season
highest
(%).
practical
method
we
recommend
consideration
monitoring
programmes.
Язык: Английский