It is mainly used in the department of surgical gastroenterology and neurosurgery. CUSA- Cavitational Ultrasonic Surgical Aspiration. Ultrasound cavitation used in the fragmentation of tissue with the action of resection and aspiration. CUSA in neurosurgery for cerebral tissue to access the tumor or aneurysm
Principle
In the handpiece, current passes through a coil and induces a magnetic field. The magnetic field excites
a transducer of a nickel alloy which expands and contract to produce an oscillating motion in longitudinal
axis with a frequency of 23 or 26khz.
The piezoelectric crystals with the alloy help the handle tip to oscillate.
Ultrasound mechanical vibrations are magnified over the length of the handpiece.
The amount of oscillation varies with low frequency there is a greater amplitude with high
frequency, there is a lower amplitude.
The oscillating brought into contact with tissue causes fragmentation of the tissue by producing
ultrasound cavitation at the cell level with the low pressure outside the cell leading to cellular disruption.
The high-frequency vibration produces heat, which reduces heats via closed, recirculating cooling of the probe’s tip.
This system maintains the temperature of the tip at approximately 40-degree C. The tissue fragmented debris must be carried away, which is another function of the cavitational ultrasound surgical aspirator for irrigation saline
or distilled water.
The Vaccum pump/suction connected using the tube and debris with fluids collected in the sample container. According to surgeon practices may vary onset values. Instruct the technologist to lower the amplitude of the tip oscillation when it reaches near to Vessels or viable tissue.
APPLICATION
In some of the situation, CUSA is indicated in some extents
- Fragmentation
- Emulsification
- Aspiration
Fragmentation of tissue and cartilage parts etc. according to the tissues the value of the Ultrasound and amplitude vary and need to be changed
Emulsification
The process in which the breakdown of bigger particles into smaller particles takes in the CUSA machine. Suctioned material takes away from the surgical site using Aspiration techniques.
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Aspiration of a significant amount of tissue and fluids from the surgical site.
mainly used in
1.Primary liver resection
The Surgical gastroenterologist uses the console during the procedures like a partial liver resection. which resect the liver tissue slowly and in a steady motion. The ergonomic style handle helps the surgeon to handle easily. The removal of debris and tissue parts were taken by the suction connected to the handle.
2.Brain tumor resection.
Brain tumor resection like cerebral tumors like a glial tumor, aneurysm clipping, etc.
cusa in neurosurgery with the extensive manner in resection and aspiration of the tumor