PREG
‐
ALERT
PRO
®
INSTRUCTION
MANUAL
Rev.
2
7/1/2007
The
probe
must
make
good
contact
with
the
skin
—air
bubbles
will
block
ultrasound.
A
coupling
fluid
such
as
cooking
oil,
must
be
used
to
enable
good
contact.
Apply
the
coupling
fluid
liberally
to
the
skin,
probe
or
both.
Press
the
probe
to
the
skin,
using
a
rotating
‐
rocking
motion,
such
that
all
air
bubbles
are
removed.
The
number
one
problem
in
using
ultrasound
instruments
is
lack
of
good
skin
contact.
We
repeat,
Ultrasound
will
not
pass
through
air
bubbles!
USING
THE
PREG
‐
ALERT
PRO
In
order
to
use
the
instrument
efficiently
and
with
the
best
results,
it
must
be
understood
that
this
instrument
is
a
tool
and
like
most
tools,
skill
is
best
obtained
by
intelligent
practice.
The
instrument
helps
you
by
providing
a
computer
enhanced
display
where
spurious
information
is
largely
eliminated,
but
the
user
must
be
the
one
to
decide
the
true
meaning
of
the
displayed
information.
Backfat
and
loin
measurement
are
easier
to
learn
than
pregnancy.
As
regards
pregnancy
detection,
both
the
animal
type
and
days
after
conception
at
which
testing
is
done
are
determining
factor
related
to
ease
of
use
and
skill
requirement.
To
illustrate,
on
the
one
hand,
swine
at
30
days
are
perhaps
the
easiest,
while
on
the
other
hand,
cattle
at
very
early
times
are
more
difficult.
Fat
measurement:
Select
the
FAT
screen.
Most
backfat
testing
in
swine
for
example
is
done
over
the
last
rib
and
40
‐
60mm
off
the
center
line
(called
the
“P2”
test
site).
This
test
site
is
also
important
for
making
the
standard
loin
measurement.
Sometimes,
measurements
at
multiple
sites
in
this
region
are
used.
Loin
muscle
measurements
include
skin
and
backfat,
so
to
measure
just
the
loin
thickness,
first
determine
backfat
thickness,
using
the
backfat
screen
and
then
measure
the
loin
and
subtract
the
backfat
reading.
Of
the
two
LOIN
screens,
select
the
one
with
the
range
appropriate
for
the
total
thickness
involved.
Internal
adjustments
are
made
to
the
speed
of
sound
factor
to
minimize
the
effect
of
the
difference
between
fat
and
muscle
tissue.
Pregnancy
indications:
Each
Pregnancy
screen
except
the
OTHER
screen,
has
a
black
bar
at
the
bottom.
The
bar
indicates
the
proximate
distance
to
the
near
and
far
points
of
the
uterus
at
the
number
of
days
indicated.
It
is
important
to
understand
that
although
the
pregnancy
screens
named
Pig,
Sheep
and
Cow
have
been
tailored
for
the
specific
animal,
the
screen
can
be
used
for
any
animal
with
the
proximate
body
dimensions
of
the
named
animal.
A
fourth
pregnancy
screen,
called
OTHER
,
can
be
used
for
all
small
and
medium
mammals,
but
not
for
large
mammals.
In
addition
when
testing
large
mammals
at
very
early
times,
e.g.
cows,
mares,
bison,
etc.,
the
optional
Deep
probe
should
be
used.
©2007
Renco
Corporation
Page
4
of
13
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