The aim of wound bed preparation is to create an optimal wound-healing environment by producing a well vascularised, stable wound bed with minimal exudate. Bacterial load has a direct impact on wound healing. The management of the bacterial load by either local or systemic therapy is important in wound management.
Refraction of Sound Waves. Refraction of waves involves a change in the direction of waves as they pass from one medium to another. Refraction, or bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves. So if the media (or its properties) are changed, the speed of the wave is changed.
When a wave moves from one medium into another, its direction of propagation changes; this is termed refraction. In addition to the transmitted wave continuing from one medium into another, there is also a reflected wave back into the original medium. For example, when your radio is playing music in your room, the sound waves pass through the walls as well as reflect from them. Similarly, some of the light from your lamp passes through the glass of the window in your room, and some also is reflected from the glass.