High-energy Shock Waves
High-energy Shock Waves - Related Videos
01:16
Shock Waves
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2023
While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs. When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high pressures...
05:39
Shock Wave Application to Cell Cultures
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Cited by 22 •
2014
Shock waves nowadays are well known for their regenerative effects. Therefore in vitro experiments are of increasing interest. We therefore developed a model for in vitro shock wave trials (IVSWT) that enables us to mimic in vivo conditions thereby avoiding distracting physical effects.
00:58
Energy and Power of a Wave
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2023
The total energy associated with a wavelength is the sum of the potential energy and the kinetic energy. The average rate of energy transfer associated with a wave is called its power, which is total energy divided by the time it takes to transfer the energy. For a sinusoidal wave, energy and power are proportional to the square of both the amplitude and the angular frequency. Waves can also be concentrated or spread out, as characterized by the intensity of the wave. Intensity is directly...
01:10
Kinetic and Potential Energy of a Wave
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2023
All forms of waves carry energy; this is directly visualized in nature. For instance, the waves of earthquakes are so intense that they can shake huge concrete buildings, causing them to fall. Loud sounds can damage nerve cells in the inner ear, causing permanent hearing loss. The waves of the oceans can erode beaches. In mechanical waves, the amount of energy is related to their amplitude and frequency. In the context of the above examples, large-amplitude earthquakes produce large ground...
01:22
Energy Carried By Electromagnetic Waves
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2023
Anyone who has used a microwave oven knows there is energy in electromagnetic waves. Sometimes, this energy is obvious, such as in the summer sun's warmth. At other times, it is subtle, such as the unfelt energy of gamma rays, which can destroy living cells. Electromagnetic waves bring energy into a system through their electric and magnetic fields. These fields can exert forces and move charges in the system and, thus, do work on them. However, there is energy in an electromagnetic wave,...
FAQs
The pressure waveform controls how the pulse interacts with its target. A rapid pressure rise supplies an intense mechanical impulse, followed by a lower-pressure phase. This sequence is important because the response is not simply continuous sound exposure: the changing pressure creates conditions in which focused stress and cavitation can produce either fragmentation or cellular stimulation, depending on the target.
Focusing places the most consequential mechanical effects at a selected target rather than across the entire exposed area. This concentration allows the same externally generated pulse to serve different purposes: it can act on mineralized material to cause fragmentation or act on tissue to stimulate cellular responses. Targeting is therefore central to treatment precision and the possibility of noninvasive medical use.
Cavitation adds to the mechanical environment created by the pressure pulse. At a focused target, its contribution combines with stress from the rapid pressure change. This combined effect can help fragment mineralized material, such as a kidney stone, or stimulate cellular responses in tissue. Its importance is that it links the physical pulse to distinct medical outcomes.
The pulses are generated outside the body and directed toward the kidney stone. At the focused target, rapid pressure changes and cavitation create mechanical stress that breaks the mineralized material into smaller fragments. Those fragments are intended to become passable, making the treatment a noninvasive approach to stone management.
The overview identifies selected musculoskeletal conditions as a clinical setting for therapeutic shock waves. In this use, the goal is not to fragment a mineralized object, but to influence pain and tissue repair through cellular responses. The approach is therefore relevant when a focused, externally generated intervention is being used for therapeutic rather than stone-fragmentation purposes.
Because the source of the pulses remains outside the body while the strongest effects are directed at a selected internal target. For kidney stones, this can fragment mineralized material into passable pieces; in selected musculoskeletal conditions, it can influence pain and tissue repair. The focused action offers a noninvasive alternative to some surgical intervention.