An experience report: C. Moosmann, C. Grabosch, B. Jänigen
Shockwaves are a special form of acoustic waves which can be used to apply physical energy to a body, e.g. the human body. When the energy is generated, there is a very steep short increase in pressure which occurs in the space of just a few nanoseconds followed by a gradual, slower drop in pressure. As the shockwave dies away, a brief negative pressure (suction effect) is created, the so-called pulling phase.
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Treatment of chronic wounds with extracorporeal shockwave therapy