90 System Processing Description
●
Oscillometric
Response
(Pressure
Pulses)
●
Cuff
Pressure
Systole
Systole
MAP
Distole
MAP
Distole
Distole
MA
P
S
ysto
le
TIME
TIME
Overall
Accuracy
Discussion
Overall
system
accuracy
shall
be
determined
by
considering
various
influences
of
the
pressure
sensor
accuracy,
motion
artifacts,
other
artifact
created
by
pressure
valve,
technical
errors
of
electrical
components,
and
the
origin
error
of
oscillometric
method.
The
origin
error
of
oscillometric
comes
from
the
basic
theory
of
that
the
MAP
is
determined
by
the
pulse.
Therefore,
there
might
be
an
error
of
the
time
between
two
pulses.
In
another
words,
the
greatest
amplitude
point
of
pulses
could
not
represent
the
MAP
point
exactly.
On
clinical
trial
perspective,
overall
system
accuracy
is
not
easy
to
be
determined.
The
clinical
trial
test
protocols
have
been
tried
and
have
been
described
in
many
treatises,
and
international
standards.
So,
there
are
many
methods
to
determine
the
overall
system
accuracy
of
Automated
Sphygmomanometer
using
the
oscillometric
method.
But,
there
are
no
absolute
test
protocols
to
determine
the
overall
system
accuracy
of
the
Automated
Sphygmomanometer
using
oscillometric
method.
Normally,
the
Gold
standards
of
Blood
pressure
for
the
reference
are
the
intra
‐
arterial
pressure
and
the
auscultatory
method.
The
popular
standard
for
the
overall
system
accuracy
is
AAMI,
SP
‐
10
2002+A1;2003
(Electronic
or
automated
sphygmomanometers).
The
main
test
conditions
are
as
follow:
A.
Data
comparing
the
Intra
‐
arterial
or
the
auscultatory
by
the
clinical
experts
with
the
automated
sphygmomanometer.
B.
For
data
collection
and
the
data
analysis,
Bland
‐
Altman
Plot
is
used.
C.
On
the
systolic,
diastolic,
and
MAP,
the
Deltas
of
all
measurements
shall
be
met
under
+/
‐
5mmHg
of
mean
difference
(MD),
and
+/
‐
8mmHg
of
standard
deviation
(SD).
(Delta
=
Intra
‐
arterial
or
Auscultatory
–
Automated
sphygmomanometer)
Содержание YM6000
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