Acute Intestinal Obstruction:

Ahmed Salamah Khalil Ebrahim

Acute intestinal obstruction is one of the most common surgical emergencies .acute intestinal obstructionmay be classified into: a mechanical obstruction be neurogenic obstruction c- vascular occlusion obstructionMechanical obstruction : is the blockage of the passase of intestinal contents distally mechanical obstructionStrangulated intestinal obstruction in which beside th eblookage of the intestine there is occlution of the blood supply of the affected part of the bowelNeurogenic intestinal obstruction is due to railure of peristaletic a movement of the intestineVescular occlusion obstruction due to thrombosis or embolism in the superior mesenteric artery vein or the smaller branches of bothAetiology of the mechanical obstruction :1- Causes in the lunen of the intesting which are intussusce ption large gall stone (gall- stone ileus),faeces , meconiun meconium ileus polynoid trnours of the bowol imperforate anus and bezoars.2- Causes in the wall of the intestine are atresia stenosis and duplication congenital causes.رسالة 158 جراحة عامةHealing refers to the body,s replacement of destroyed tissue by living tissueThe ingrowth of granulation tissue in to a haematoma has three phases :1-Traumatic inflammatory phase .2- Demolition phase3-in growth of granulation tissue phaseThe initial inflammatory response is essential for the subsequent proliferation of fibroblasts the presence of platelets results in the release of a factor which stimulate fibroblast proliferation even more important in this respect is the macro phage granulation tissue is formed by the prolife ration and migration of the surrounding connective tissue elements two stages in the formation of granulation tissue are recognized ; firstly a stage of vascularization and subsequently a stage.