Pressures sores result from the death (necrosis) of tissues due to local deprivation of blood supply, and thus of oxygen.
Critical analysis of these forces indicates that pressure necrosis from sutures is the primary factor in wound dehiscence. Other factors play a secondary role, either in delaying the healing of a wound or in increasing the stress on it. PressureUlcer.net. Necrosis occurs when there is not enough blood flowing to the tissue, ultimately resulting in death of body tissue. It is often necessary to surgically remove the tissue that looks black, as it impairs the pressure ulcer from healing and hinders the assessment of the pressure ulcer size and depth. pressure necrosis. necrosis of tissue caused by exclusion of circulation by external compression, e.g. in prolonged recumbency, or due to too-tight bandage, collar, harness. negative pressure. pressure less than that of the atmosphere. oncotic pressure. the osmotic pressure of a colloid in solution. How helpful was this article? Modified on December 09, 2009 What is Pressure Necrosis? Pressure necrosis develops when too much pressure is placed on the skin of a dog's neck by the receiver collar's contact points for a prolonged period of time. Pressures sores result from the death (necrosis) of tissues due to local deprivation of blood supply, and thus of oxygen (ischemic necrosis). This is why tissue compression is the first clinical sign of pressure sores; it blocks the small blood vessels supplying tissues. In this article. Avascular necrosis (AVN), also called osteonecrosis, aseptic necrosis, or ischemic bone necrosis, is a condition that occurs when there is loss of blood to the bone. Because bone is living tissue that requires blood, an interruption to the blood supply causes bone to die.
http://www.ncbi.nlm.nih.gov/pubmed/3882201 http://www.pressureulcer.net/pressure-ulcer-necrosis/ http://medical-dictionary.thefreedictionary.com/pressure+necrosis http://www.guardianpet.net/Knowledge-Base/Remote-Trainer-(1)/Frequently-Asked-Questions/What-is-Pressure-Necrosis- http://cirrie.buffalo.edu/encyclopedia/en/article/347/ http://www.webmd.com/arthritis/avascular-necrosis-osteonecrosis-symptoms-treatments
what is pressure necrosis