Ultrasound; acoustic wave vibrating at frequencies above those that the human ear can listen to, more than 20,000 cycles per second (hertz, Hz).
Healing ultrasound is that which is used for therapeutic (rather than analysis) objectives and also is usually produced at 1 million cycles per 2nd or 1 megacycle (MHz). Usually US frequency is in between 0.7 as well as 3.3 MHz.
Ultrasound was first researched in Europe and was introduced to the USA in the very early 1950′ s, considering that this time, the use of ultrasound has actually grown, and it remains an incredibly popular modality today.
Mechanism of action
US is generated by a high-frequency rotating present being used to a crystal made of quartz or an artificial (i.e. barium titanate or lead zirconate). The resonance power is moved to a steel plate, generally nickel-plated brass, and also then the individual’s tissue.
Physical residential or commercial properties
It is not sent via a vacuum
It is transmitted improperly through gases
It is transferred finest with gas-free liquids and also high-density solids
Similar to a radio transmitter.
Has an oscillator that generates electromagnetic wave at high regularities.
Transforms electromagnetic waves right into sound waves.
Larger transducer surface is better (7-13cm *), however little enough to preserve skin call.
Waves are emitted in a cylindrical beam perpendicular to traducer surface area. Hold the transducer head parallel to tissue surface.
Never enable the beam of light to shoot right into the air without gel or water as this might harm the crystal.
To test crystal: water on the head, transform up the intensity the water should stream.
Air does not perform well, should utilize a combining medium. Make use of a business gels, not mineral oil as well as some gels will certainly contain compounds that can promote healing such as, vit E, aloe.
As US travels with human cells, it slowly lowers in strength as a result of attenuation. Attenuation is the outcome of reflection, refraction and also absorption, with absorption audit for regarding fifty percent of attenuation.
– Healthy proteins are the significant absorbers people
– Rise protein material increase absorption
– Tissues with high water content decrease absorption (waves travel through).
– Uniform tissues decrease absorption (fat).
– Heterogeneous cells, fascia airplanes raise absorption.
e.g. bone periosteum, fat muscle, diff muscular tissue teams.
– Bone reflects waves, which satisfy incoming waves: vibration therefore heat production (periosteal burning).
– Metal artefacts reflects waves yet soak up heat as a result care.
Conversion of the titanium gel Ð‘ÑŠÐ»Ð³Ð°Ñ€Ð¸Ñ mechanical energy people right into heat is expressed as an absorption coefficient and is reliant on cells kind and also frequency. This coefficient is expressed in decibels/cm as well as is greatest for tissues with the Ñ‚Ð¸Ñ‚Ð°Ð½Ð¸ÑƒÐ¼ Ð³ÐµÐ» Ð¼Ð½ÐµÐ½Ð¸Ñ highest collagen material and also boost in percentage to the United States regularity.
US is Ñ‚Ð¸Ñ‚Ð°Ð½Ð¸ÑƒÐ¼ Ð³ÐµÐ» created by a high-frequency rotating existing being applied to a crystal made of quartz or a synthetic (i.e. barium titanate or lead zirconate). The current triggers the crystal to flex, initially in one instructions and then the various other, as the current alternates. This contortion of the crystal produces what is called piezoelectric energy. The vibration power is moved to a steel plate, normally nickel-plated brass, and then the individual’s cells. The crystal and also steel plate are housed in the transducer or sound head of the device.