Overview
2-2 CUSA Excel Ultrasonic Surgical Aspirator System User’s Guide
Overview
The CUSA EXcel system is an ultrasonic surgical aspirator that allows a
surgeon to remove tissue – selectively and with precise control. It
performs three functions:
•Fragmentation
• Irrigation
• Aspiration (Suction).
All three functions may occur at the same time.
The CUSA EXcel system includes the following components:
• The Console:
! The Console Body houses electronics, pumps, and mechanical
parts.
! The Control Panel allows the user to control the system.
• The Handpiece is the handheld surgical device with a tip that actually
touches the patient.
• Accessories include manifold tubing, tips, a tip torquing base and
torque wrench, and a sterilizer case.
Fragmentation
Electromechanical Operation
The CUSA EXcel console provides alternating current at 23 or 36 thousand
cycles per second (kHz) to the handpiece (the frequency depends on
which handpiece you connect to the console). In the handpiece, the
current passes through a coil, which induces a magnetic field. The
magnetic field excites a transducer of nickel alloy laminations, resulting in
an oscillating motion in the transducer laminated structure – vibration –
along its long axis (refer to the figure at left). The transducer vibrates at
23 or 36 kHz.
The transducer transmits vibrations through a metal connecting body to
an attached surgical tip. The frequency of vibration remains the same at
the tip (23 or 36 kHz), but the amount of motion (amplitude) at the tip
varies: Lower frequency, greater amplitude; higher frequency, smaller
amplitude.
Amplitude also varies with the transducer/connecting body/tip
configuration: Handpiece angles reduce tip amplitude.
When the vibrating tip contacts tissue, it breaks cells apart (fragments
them).
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