User's Manual

1.18 8065751772
Occlusion Tones
Two different occlusion tones (intermittent beeping tones during occlusion) indicate
that the vacuum is near or at its preset limit, and aspiration ow is reduced or stopped
to avoid exceeding the limit. The rst type, the I/A occlusion tone, sounds when
occlusion occurs during aspiration only (in the absence of ultrasonic power). The
I/A occlusion tone is a lower, intermittent single beep. The second type of occlusion
tone, the phaco occlusion tone, is a higher, intermittent double beep, and sounds when
occlusion occurs during application of ultrasonic power.
The I/A occlusion and phaco occlusion tones indicate that the vacuum has reached its
maximum allowed preset value. The I/A occlusion tone can be turned off, while the
phaco occlusion tone cannot be turned off.
WARNINGS!
The phaco occlusion bell indicates no aspiration ow. Use of high U/S settings and/or
prolonged use may lead to thermal injury.
Use of the phaco handpiece in the absence of irrigation ow and/or in the presence
of reduced or lost aspiration ow can cause excessive heating and potential thermal
injury to adjacent eye tissues.
In the event of a persistent loss of aspiration during the application of U/S power,
remove U/S power via footswitch control.
Vacuum Tone
A vacuum tone is provided. The pitch will vary relative to the amount of vacuum. A
high vacuum can indicate that little to no ow is occuring. This tone can be reduced
in volume, but not turned off.
WARNINGS!
A moderate to high vacuum tone may indicate little to no ow is occuring. Use of the
phaco handpiece in the absence of irrigation ow and/or in the presence of reduced
or lost aspiration ow can cause excessive heating and potential thermal injury to
adjacent eye tissues.
Do not exceed maximum capacity of drain bag (500 ml). Excessive pressure can result
from exceeding drain bag maximum capacity and potentially result in a hazardous
condition for the patient.
In the event of a persistent loss of aspiration during the application of U/S power,
remove U/S power via footswitch control.
Cautery, Diathermy, Coagulation Denition
The Centurion
®
Vision System uses the word “Coagulation” in place of Cautery or
Diathermy, based on the following denition:
Coagulation - Isolated, bipolar, high frequency current supplied to conductors (e.g.
forceps). Current passes between these electrodes, halting bleeding. (Abbreviated
“Coag” in some of the text of this operator’s manual.)