illuminate to indicate cuff activation. If the unit cannot
pressurize the cuff to within 15 mm Hg of the set point
in less than 13 seconds, a leak alarm will be sounded.
See Section 2.8 for information about possible alarm
conditions. Once the cuff is inflated, the TIME display
will track elapsed inflation time.
6.
At the end of the procedure, deflate the cuff by pressing
the MAIN CUFF DEFLATE button for minimum of
2 seconds. The MAIN CUFF bar indicator will go out,
the PRESSURE display will show the deflation of the
cuff, and the time limit (inflation) clock will stop.
NOTE:
The elapsed inflation time can be “zeroed” at
any point in the procedure by pressing the TIME and
PRESSURE buttons simultaneously.
7.
Remove the tourniquet cuff and any underlying
bandages or protective sleeve immediately following
final deflation.
The time of tourniquet cuff removal
should be noted, and the circulation of the limb should
be checked.
8.
After the cuff has been removed, disconnect the cuff
from the
A.T.S.
1200 Tourniquet.
9.
During normal use, the
A.T.S.
1200 Tourniquet should
not be set to STANDBY if pressure is present in either
cuff. Once the cuff has been properly deflated, removed
from the patient and disconnected from the
A.T.S.
1200
Tourniquet, the unit can be set to STANDBY.
2.7 DUAL CUFF OPERATION
Operation of the unit is identical to Single Cuff operation
(see Section 2.6) except for the following points:
1.
Both single port cuffs are connected at the bottom of the
unit (Reminder: Main cuff is the
red
port, Second cuff is
the
blue
port).
2.
The MAIN CUFF and SECOND CUFF indicator lights
will illuminate to indicate cuff activation (i.e. if both
cuff indicator lights are illuminated then both cuffs
are inflated).
3.
During a pressure alarm a flashing CUFF indicator light
warns which cuff(s) to check.
4.
Deflation of one cuff will not be permitted while the
other cuff is inflating.
5.
When inflating a second cuff with the other cuff already
inflated, the unit will continuously check the original
cuff to ensure that the pressure is within allowable
limits. The unit will stop its inflation and maintain the
original cuff to within 10 mm Hg of the set point before
returning to the inflating cuff. This ensures that at least
one cuff maintains occlusion at all times. If there is a
significant leak in the original cuff, this feature could
cause the inflation rate of the subsequent cuff to be
longer and perhaps even cause the 30-second inflation
alarm to sound. The display shows the pressure in the
inflated cuff so as to allow the operator to view the
progress of inflation.
6.
When both cuffs are inflated, the display indicates an
average of the pressures sensed in the two cuffs. If one
cuff has a sustained leak or a significant leak (as
described in Section 2.9.1) a pressure alarm may
be sounded.
7.
When deflating a cuff with the other cuff remaining
inflated, the display shows the pressure in the cuff that
remains inflated.
8.
In order to deflate the final cuff, a sequence must be
followed to prevent accidental deflation:
a)
Press and hold the DEFLATE button on the cuff
to be deflated.
b)
When the “CUFF” “DEFL” alarm is active,
release the DEFLATE button.
c)
Within 5 seconds of the alarm discontinuing,
press the DEFLATE button once again.
d)
The cuff will deflate. This safety feature is
particularly useful when using the unit for Bier
Block Cuff Operation (IVRA).
2.8 BIER BLOCK CUFF OPERATION (IVRA)
Review Sections 2.6 and 2.7, SINGLE CUFF OPERATION
and DUAL CUFF OPERATION.
1.
The following are suggested cuff connections:
a)
The proximal cuff connected to the
red
Main cuff
port using the
white/red
cuff tubing;
b)
The distal cuff connected to the
blue
Second cuff
port using the
white/blue
cuff tubing.
2.
Follow the cuff inflation sequence adopted by your
institution or requested by the surgeon.
3.
Deflation of a cuff is not possible while the other
is inflating.
4.
When requested, the first can be deflated simply by
pressing and holding the DEFLATE button for a
minimum of 2 seconds.
5.
In order to deflate the final cuff, a sequence must be
followed to prevent accidental deflation:
a)
Press and hold the DEFLATE button on the cuff
to be deflated.
b)
When the “CUFF” “DEFL” alarm is active,
release the DEFLATE button.
c)
Within 5 seconds of the alarm discontinuing,
press the DEFLATE button once again.
d)
The cuff will deflate.
6.
For Bier Block procedures follow the cuff inflation/
deflation sequence adapted by your institution or
requested by the surgeon.
2.9 ALARM CONDITIONS
There are a number of conditions for which the
A.T.S.
1200
Tourniquet will produce a visual and/or audible alarm. Those
conditions, indications and appropriate actions are shown in
Table 2.1. The appropriate actions indicated are based on the
11
A.T.S. 1200 TOURNIQUET SYSTEM
