Ultrasound; sound waves shaking at frequencies over those that the human ear can listen to, more than 20,000 cycles per secondly (hertz, Hz).
Therapeutic ultrasound is that which is made use of for restorative (as opposed to analysis) functions and also is usually created at 1 million cycles per second or 1 megacycle (MHz). Usually US frequency is between 0.7 and 3.3 MHz.
Ultrasound was very first looked into in Europe as well as was presented to the United States in the very early 1950′ s, given that this time around, using ultrasound has grown, and it remains a popular technique today.
Mechanism of action
US is produced by a high-frequency alternating present being applied to a crystal constructed from quartz or a synthetic (i.e. barium titanate or lead zirconate). The present causes the crystal to bend, initially in one instructions and also after that the various other, as the existing alternates. This contortion of the crystal develops what is called piezoelectric energy. The resonance energy is moved to a metal plate, typically nickel-plated brass, and afterwards the person’s cells. The crystal and also metal plate are housed in the transducer or sound head of the system.
It is not transmitted through a vacuum cleaner
It is transferred improperly with gases
It is transmitted finest with gas-free liquids as well as high-density solids
Similar to a radio transmitter.
Has an oscillator that produces electro-magnetic wave at high regularities.
Transforms electromagnetic waves into acoustic waves.
Bigger transducer surface is much better (7-13cm *), but little adequate to maintain skin get in touch with.
Waves are produced in a round beam vertical to traducer surface. Consequently hold the transducer head parallel to cells surface.
Never allow the beam to fire right into the air without gel or water as this may harm the crystal.
To test crystal: water on the head, show up the strength the water should stream.
Air does not carry out well, need to use a coupling tool. Utilize a commercial gels, not mineral oil as well as some gels will certainly contain materials that can promote recovery such as, vit E, aloe.
As US takes a trip through human cells, it slowly lowers in intensity as a result of attenuation. Attenuation is the outcome of representation, absorption as well as refraction, with absorption audit for about fifty percent of depletion.
– Proteins are the major absorbers people
– Boost healthy protein material increase absorption
– Cells with high water web content decline absorption (waves pass via).
– Uniform tissues reduce absorption (fat).
– Heterogeneous tissues, fascia airplanes enhance absorption.
e.g. bone periosteum, fat muscular tissue, diff muscle mass teams.
– Bone shows waves, which satisfy inbound waves: vibration consequently warmth manufacturing (periosteal burning).
– Metal artefacts shows waves but take in warmth therefore care.
Conversion of the titanium gel Ñ†ÐµÐ½Ð° power of US into heat is expressed as an absorption coefficient and also depends on tissue type and also regularity. This coefficient is expressed in decibels/cm and is greatest for cells with the Ð¿Ñ€Ð¾ÑÑ‚Ð¾ ÐºÐ»Ð¸ÐºÐ½ÐµÑ‚Ðµ Ð²ÑŠÑ€Ñ…Ñƒ ÑÐ»ÐµÐ´Ð²Ð°Ñ‰Ð°Ñ‚Ð° ÑÑ‚Ñ€Ð°Ð½Ð¸Ñ†Ð° highest possible collagen content as well as boost in proportion to the United States regularity.
US is ÑÑŠÐ¾Ñ‚Ð²ÐµÑ‚Ð½Ð°Ñ‚Ð° ÑƒÐµÐ± ÑÑ‚Ñ€Ð°Ð½Ð¸Ñ†Ð° created by a high-frequency rotating present being applied to a crystal made of quartz or a synthetic (i.e. barium titanate or lead zirconate). The current triggers the crystal to bend, initially in one instructions and also then the various other, as the current alternates. This deformation of the crystal develops what is called piezoelectric power. The vibration energy is transferred to a metal plate, generally nickel-plated brass, and also after that the patient’s cells. The crystal and also metal plate are housed in the transducer or audio head of the system.