E-SOUM-PLUS Rev E
25
Pulse Setting 50-90% [Pulsed]
The Pulse function minimizes exposure to ultrasound over time.
The Pulse setting corresponds to the duration of the active period of the ultrasound output. For example, a Pulse setting of
60% corresponds to an active period of 60% of ¼ second (150ms). The resulting resting period is 40% of ¼ second (100ms).
The ultrasonic energy output over time is reduced by 40% with this setting. Note that the ultrasound timer will only advance
during the active period and not during the resting period.
Figure 6.3.1 Illustration of pulse setting
Irrigation
Proper irrigation with sterile saline ensures:
1.
Cooling of handpiece and vibrating elements
2.
Cooling and lavage of the surgical site
3.
Lubrication of bone/tip interface for hard tissue removal.
The active ultrasonic probe remains cold when not in contact with tissue. However, when a tip contacts tissue heat is gen-
erated. The heat increases with applied tip pressure or amplitude. Irrigant needs to be applied at the tip/tissue interface to
mitigate this temperature rise.
Most ultrasonic tips and probes feature an integrated irrigation channel. The irrigant is expelled through a jet nozzle at the
tip. Active tip surfaces are being cooled directly.
