<s>
Lifepak	B-Algorithm
(	O
stylized	O
LIFEPAK	B-Algorithm
)	O
is	O
a	O
series	O
of	O
vital	O
signs	O
monitors	O
and	O
external	O
cardiac	O
defibrillators	O
produced	O
by	O
medical	O
technology	O
company	O
Physio-Control	O
.	O
</s>
<s>
Physio-Control	O
publicly	O
demonstrated	O
its	O
first	O
Lifepak	B-Algorithm
branded	O
defibrillator	O
,	O
Lifepak	B-Algorithm
33	O
,	O
in	O
November	O
1968	O
and	O
began	O
commercial	O
sale	O
of	O
the	O
unit	O
the	O
next	O
year	O
in	O
1969	O
.	O
</s>
<s>
Semi-automatic	O
units	O
include	O
the	O
Lifepak	B-Algorithm
12	O
,	O
Lifepak	B-Algorithm
15	O
,	O
and	O
Lifepak	B-Algorithm
20	O
for	O
use	O
by	O
healthcare	O
professionals	O
such	O
as	O
emergency	O
medical	O
technicians	O
and	O
paramedics	O
.	O
</s>
<s>
Automatic	B-Algorithm
units	O
include	O
the	O
Lifepak	B-Algorithm
500	O
,	O
Lifepak	B-Algorithm
1000	O
,	O
Lifepak	B-Algorithm
CR	O
Plus	O
and	O
the	O
Lifepak	B-Algorithm
CR2	O
for	O
use	O
by	O
members	O
of	O
the	O
public	O
who	O
have	O
been	O
trained	O
to	O
operate	O
them	O
.	O
</s>
<s>
Lifepak	B-Algorithm
defibrillators	O
are	O
more	O
than	O
just	O
defibrillators	O
.	O
</s>
<s>
Many	O
models	O
allow	O
for	O
cardiac	O
monitoring	O
(	O
including	O
heart	O
rate	O
monitoring	O
and	O
12-Lead	O
EKG	B-Application
acquisition	O
and	O
interpretation	O
)	O
and	O
alert	O
the	O
users	O
to	O
sudden	O
changes	O
.	O
</s>
<s>
The	O
Lifepak	B-Algorithm
15	O
and	O
20e	O
(	O
when	O
equipped	O
with	O
CodeManagement	O
Module	O
)	O
models	O
include	O
a	O
CPR	O
metronome	O
that	O
verbally	O
tells	O
the	O
rescuers	O
when	O
to	O
ventilate	O
the	O
patient	O
.	O
</s>
<s>
Some	O
Lifepak	B-Algorithm
defibrillators	O
also	O
include	O
options	O
for	O
synchronized	O
cardioversion	O
(	O
for	O
treating	O
unstable	O
fast	O
rhythms	O
like	O
supraventricular	B-Algorithm
tachycardia	I-Algorithm
or	O
atrial	B-Application
fibrillation	I-Application
)	O
,	O
external	B-Algorithm
pacing	I-Algorithm
(	O
for	O
post-cardiac	O
arrest	O
,	O
bradycardia	B-Algorithm
,	O
and/or	O
heart-block	B-Algorithm
patients	O
)	O
,	O
and	O
also	O
monitor	O
oxygen	O
saturation	O
,	O
CO2	O
output	O
for	O
intubation	O
,	O
and	O
blood	O
pressure	O
.	O
</s>
<s>
The	O
Lifepak	B-Algorithm
CR2	O
includes	O
CPRInsight	O
analysis	O
technology	O
which	O
allows	O
for	O
chest	O
compression	O
during	O
analysis	O
of	O
the	O
patient	O
's	O
ECG	B-Application
.	O
</s>
