SURGICAL ULTRASONIC EQUIPMENT
Instrument using high energy source for surgery.
It works through ease of dissection, and aspiration of soft tissue
- Ultrasonic techniques are well established in neurosurgery for rapid and efficient removal of intracranial and spinal cord tumors.
- This instrument is also used in resection, and dissection applications of:
(a) Liver,
(b) Kidney, and
(c) Spleen.
- Their application is also gaining popularity in pancreatic and urologic surgery.
Ultrasonic surgery is carried out with the aid of a special instrument known as the CUSAtm (Cavitron TM Ultrasonic Surgical Aspirator).
- This is an acoustic vibrator which consists of three distinct components.
• Transducer: A device, that converts electromagnetic energy into mechanical vibrations. The transducer is composed of a stack of nickel alloy plates. A magnetic field is produced by a coil placed around the plates and causes mechanical motion of approximately 300 microns.
• Connecting body: Mechanically conveys the motions of the transducer to the surgical tip. It also amplifies the vibration motion of the transducer.
• Surgical tip: Completes the amplifications of the motion and also contacts the tissue. For this reason the tip is relatively long compared to its diameter and this provides adequate motion amplification.
- The electric coil which is permanently fitted in the hand piece surrounds the transducer.
- This coil receives 23,000 cycles per second (hertz) alternating electric current from the console and activates the transducer.
- The hand piece is connected to the console by a cable which includes the tubing for circulating fluid between the cooling water canister in the console and the hand piece.
- Since the electric coil has a current flowing through it heat is generated and absorbed by the water circulating within the hand piece.
- This keeps the hand piece at a comfortable temperature for the surgeon.
Any questions be sent to drmmkapur@gmail.com
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