'PAR' in PAR 20 or PAR 50 is an acronym standing for Parabolic Aluminized Reflector. This name refers to the construction of the PAR bulb. The bulb traditionally features a tungsten filament surrounded by a reflector with an aluminum coating (hence aluminized). The reflector intensifies the beam and makes it more efficient.
Toe necrosis; Toe ischemia; Amputation; Dry gangrene Abstract Toe necrosis may have vast different etiologies. These include ischemia, embolus, and others. (1) The most common etiology is ischemia. It is a reduction in blood supply to a viable tissue that can lead to susceptibility to infection and tissue death. Peripheral ischemia, which is rooted in the
Causes of Avascular Necrosis Avascular necrosis, also known as Freibergâs disease or Freibergâs Infarction or Infraction, is a painful condition that frequently affects young athletes, especially teenaged girls. The causes of a particular case of avascular necrosis are difficult to pin down, but the condition is often caused by overuse and repetitive stress to the area, or what specialists refer to as âchronic microtrauma.â