Allergic reactions to anaesthesia giving false positive and false negative results. Although complications during anaesthesia are rare, potentially life-threatening consequences may occur if an anaphylactic reaction develops. The severity of the reaction whilst under anaesthesia is because the anaesthetist is only made aware of the allergy when it is severe enough to compromise the cardiovascular system and the respiratory system. At this stage, there is little time to manage the situation and recognise the severity of the condition. The immediate management of the issue consists of three processes: Since the full withdrawal of the offending substance is near impossible, the administration of adrenalin is
Dermatographic urticaria rapidly break down under physical pressure, which then causes an allergic-like reaction. Symptoms can be caused or induced by: The underlying cause of dermographism is not known, and it can last for many years without relief. The condition may subside and be effectively cured; however, it is often a lifelong ailment. It is not a life-threatening disease, and it is not contagious. Dermographism may occur in mastocytosis (systemic mast cell proliferation). Dermographism can be treated by substances which prevent histamine from causing the reaction (i.e. an antihistamine). These may need to be given as a combination of H antagonists, or