Safety Notes

Using the Arthroscopy Indication
59
en
Actual pressure > nominal pressure
+30 mmHg
If the actual pressure exceeds the nominal pressure by more than 30 mmHg (ex-
ample: nominal pressure = 45 mmHg, actual pressure = 76 mmHg), the following
safety mechanisms are automatically triggered by the device:
• After a few second: a pressure relief function is activated consisting of turning
the roller wheel backwards. A low acoustic alarm (beep) is emitted 4x.
• If the actual pressure falls below the nominal pressure, the roller wheel starts
turning forward again and irrigation is continued.
Actual pressure > 200 mmHgIf the actual pressure exceeds a value of 200 mmHg, the following safety mech-
anisms are automatically triggered by the device:
• Immediately: The color of the actual pressure display bar changes from blue to
red. The center of the bar depicts the actual pressure.
• A loud warning beep is emitted 1 time after a few seconds have passed.
Actual pressure > 250 mmHgIf the actual pressure exceeds a value of 250 mmHg, the following safety mech-
anisms are automatically triggered by the device:
• After a few seconds: The status line depicts Critical overpressure! in red letters.
• A pressure relief function is activated that consist of turning the roller wheel
backwards.
• After a few seconds: A continuous acoustic signal (beep) is emitted and the roll-
er wheel stops.
• If the actual pressure falls below the nominal pressure, the roller wheel starts
turning forward again and irrigation is continued. The warning message in the
status line is no longer displayed.
CAUTION!
The message "Critical Overpressure!" overwrites all other possible messages.
Overpressure warnings serve as information for the attending physician to re-
spond appropriately to the existing excess pressure. The intra-articular joint
pressure can be reduced by opening the outflow cannula, for example. If possi-
ble, the attending physician should perform this task.
9.10.3 Exceeding the Nominal Pressure When Using a Day Patient Tube
Set
Overpressures may occur during device operation. The device features corre-
sponding safety mechanisms that support the physician performing the surgery
in deciding on appropriate responses.
Actual pressure > nominal pressure
+30 mmHg
If the actual pressure exceeds the nominal pressure by more than 30 mmHg (ex-
ample: nominal pressure = 45 mmHg, actual pressure = 76 mmHg), the following
safety mechanisms are automatically triggered by the device:
• The roller wheel stops.
• After a few seconds: A low acoustic alarm (beep) is emitted max. 4x.
• If the actual pressure falls below the nominal pressure, the roller wheel starts
turning forward again and irrigation continues.
Actual pressure > 200 mmHgIf the actual pressure exceeds a value of 200 mmHg, the following safety mech-
anisms are automatically triggered by the device:
• Immediately: The color of the actual pressure display bar changes from blue to
red. The center of the bar depicts the actual pressure.
Actual pressure > 250 mmHgIf the actual pressure exceeds a value of 250 mmHg, the following safety mech-
anisms are automatically triggered by the device:
• Immediately: The roller wheel stops.
The status line depicts Critical overpressure! in red letters if the overpressure
actually occurs inside of the joint.
• A continuous acoustic signal is emitted if the overpressure actually occurs in-
ARTHRO
SET
PRESSURE
45 mmHg
SET
FLOW
1.5 l/min
ACTUAL PRESSURE
0 50 100 150 200
STOP WASH
Critical overpressure!
Knee
285 mmHg
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