oa South African Family Practice - Ultrasound and the future of anaesthesia : refresher course
Ultrasound is an oscillating sound pressure wave with a frequency greater than the upper limit of human hearing (20 kilohertz). Medical ultrasound utilizes sound waves with a frequency of 1-18 Megahertz. In the last decade or so, there has been an exponential increase in the use of ultrasound technology in the medical field, outside the realm of radiologists.
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