Irrigation
Introduction to the Console
CUSA Excel Ultrasonic Surgical Aspirator System User’s Guide 2-3
Cooling
The high frequency vibration generates heat. To reduce the heat, the
CUSA EXcel system includes a closed, recirculating cooling water system.
This system pumps water from a cooling water reservoir, through a tube
in the handpiece cable, through the handpiece, and through a return tube
in the handpiece cable to the cooling water reservoir. Cooling water flows
at 35 to 50 cc/min.
As it passes through the handpiece, the water removes heat. Normal
handpiece temperature, in sustained heavy use, remains at about
40° C (104° F).
Use distilled water for the cooling water system because it does not
contain natural minerals, chemical additives, or organic materials that are
present in tap water. Any of these impurities in tap water can cause
problems within the cooling water system.
Irrigation
Sterile irrigation fluid flows from an I.V. set (bottle or bag and I.V.
administration tubing) to a variable speed peristaltic pump:
• The pump moves fluid at 1 to 10 cc/min; default flow is 3 cc/min.
Adjustment buttons (blue up/down arrows on black buttons at the
bottom of the irrigation display column on the control panel) allow
you to increase or decrease the irrigation flow.
• The pump can also accelerate to a Fast Flush speed, pumping at
25 to 30 cc/min. The Fast Flush pedal on the CUSA EXcel system
footswitch activates the Fast Flush feature.
The pump pushes the fluid through the manifold irrigation tubing to a
flue, a sleeve surrounding the vibrating tip. As the irrigation fluid passes
through the flue, it cools the tip.
When the fluid reaches the distal end of the tip, as much as 99% of it
passes through two pre-aspiration holes in the tip, eliminating fluid
pooling on the sterile field and continually clearing the suction system.
The fluid that does not pass through the pre-aspiration holes irrigates the
surgical site and suspends fragmented tissue.
Threads
Pre-aspiration Hole (2)
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