ENT involvement is common in ANCA-associated vasculitis (AAV), particularly in GPA and EGPA. Early recognition and treatment is important for good outcomes, yet evidence suggests that UK ENT surgeons may not consistently recognise the early features of AAV, despite a similar incidence to vestibular schwannoma. AAV is a rapidly advancing field, with significant developments in the understanding of its pathogenesis, classification and treatment over the past decade. Relevant vasculitis mimics are also discussed with a particular focus on the increasing prevalence of vasculitis mimics driven by an increase in recreational cocaine use, as well as the emergence and reclassification of several other vasculitis mimics in the head and neck. This article reviews key recent updates in the vasculitis literature, with a particular focus on those relevant to recognition and diagnosis of AAV for the ENT surgeon. Strengths and limitations of relevant diagnostic testing are discussed, and a method of evaluation of patients with features of AAV presenting to ENT services is outlined. | 317

BackgroundIn November 2017, a working feasibility analysis commenced of a local anaesthetic endonasal procedures out-patient clinic service at Freeman Hospital, Newcastle upon Tyne. Fundamental to introducing an innovative ambulatory out-patient practice is the development of a novel local safety standard for invasive procedures to support this service.ObjectiveThis paper presents the new safety standard developed for this purpose and implemented in our institution.ConclusionIncreasingly, there is a shift toward ambulatory services, directed by patient choice, technological advances and the opportunity for cost savings. It is hoped that this local safety standard for invasive procedures will provide a useful template for those considering implementing ambulatory endonasal services, or other novel procedures, within the specialty of ENT.

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