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    實證醫學報告PPT課件

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    這是實證醫學報告PPT課件,主要介紹了實證醫學的五大進行步驟;英國Oxford Center證據應用等級;疥瘡的防治,歡迎點擊下載。

    實證醫學報告 藥劑科 黃佳真 藥師 實證醫學的五大進行步驟 Five Steps to Practice EBM Formulate an answerable question. (PICO) 由個案的臨床資料形成可回答的臨床問題 Track down the best evidence. (Search database) 尋找最佳的實證﹝各種文獻及資料庫,包括發表及未發表資料﹞ Critically appraise the evidence for validity, impact, and applicability. (VIP) 評估各種醫學報告的可信度、臨床重要性,以及可應用性 Integrate with our clinical expertise and patient values. 整合並應用於實際患者的治療決策﹝臨床應用﹞ Evaluate our effectiveness and efficacy. 效果評估 Clinical scenario 感控室發現最近有一個問題,即同一病房中爆發 3例疥瘡(Scabies)感染,因醫療人員需長期接觸病人 ,為預防感染擴大,故感控室考慮是否讓護理站工 作人員使用治療疥瘡之藥物 , 該如何處理才最適當? Background knowledge Common causes infestation of human mite Sarcoptes scabiei. close or direct skin-to-skin contact Symptoms/signs Intense nocturnal pruritus within 1-4 weeks after infection. Severely itchy lesions typically present as small papules with noticeable curvy or straight burrows commonly located in skin folds. Secondary signs may include general rash, urticaria, eczema, excoriation, and impetigo. Incubation appears to be 1-4 weeks, most patients are asymptomatic during that time Scabies mites can survive for 48-72h off the human body Images Problem , PICO Patient and/or problem: No symptomatic staff who contact scabies patient Intervention : Mediation for treat scabies Comparison intervention : No intervention Outcomes : Prevent scabies outbreak ,感染率? Search strategy Search strategy-1 Search strategy-2 Search strategy-3 Search terms: scabies and asymptomatic limits: Title/Abstract, published in the last 10 years, only items with links to full text result: 8 papers found Discard irrelevant papers Finally, 1 paper is cited terms: scabies and outbreak → 221 papers limits: Title/Abstract, published in the last 5 years, only items with links to full text, English result: 14 papers found Discard irrelevant papers Finally, 2 paper are cited 英國Oxford Center證據應用等級 Citations-1 Citations-2 Chambliss NL.Treating asymptomatic bodily contacts of patients with scabies. Arch Fam Med. 2000 May;9:473-4. (level 2A) Scheinfeld N. Controlling scabies in institutional settings: a review of medications, treatment models, and implementation. Am J Clin Dermatol. 2004;5:31-7 Vorou R, Remoudaki HD, Maltezou HC. Nosocomial scabies. J Hosp Infect. 2007 Jan;65:9-14. 南部某區域教學醫院加護病房疥瘡感染群突發之調查 此疥瘡群突發發生在南部某區域教學醫院的加護病房,於七月份下旬,至民國90年7月31日為止,有十位護理人員及一位住院病患受到感染及疑似感染,分別於四肢、軀幹、背部及腹部等不同部位有癢及紅疹情形,其中有5位護理人員及1位住院病患共6位經皮膚科診斷確定為感染疥瘡,護理人員感染率為13.2 %,該ICU住院病人感染率為4%。 該單位已感染疥瘡之病患及護理人員予以Scalphen oint治療,疑似感染及接觸者予以Eurax(Crotamiton)治療,照護感染病患時採接觸隔離,並加強洗手、穿隔離衣、戴手套以及隔離防護之再教育等。 追究極可能由於醫護人員認為感染來源之病患已擦藥二星期傳染力減低而未適時採取適當隔離措施所致,後經皮膚科醫師診斷及藥物治療以及嚴格的防護措施,該單位未再發現任何新的疥瘡個案。 疥瘡的防治 臺灣醫學 2000 照顧疥瘡患者之工作人員有40-70%的侵襲率(attack rate) 。國內群突發調查工作人員遭受疥瘡感染之侵襲率也近四成。 根據Degelar處理長期照護機構疥瘡群發之經驗,依其傳染途徑將治療方式分為三類;第一類是高傳染途徑性,例如挪威疥或身上疹子大於50個。第二是一般疹,或疑似疥蟲感染,且身上蟲子小於50個。第三類包括所有無癥狀但曾經接觸第一、二類患者,或覺得皮膚搔癢,但無任何疹子者。使用5% Permethrin全身塗抹8~14hrs即有治療效果, 第二、三類ㄧ次治療即可。 疥瘡的防治 臺灣醫學 2000 在評估接觸者方面,許多文獻調查發現,只有治療感染者會造成控制失敗,因此,對象應包括病患、員工及兩者家屬。 至於是否使用預防性用藥,可根據該醫院過去之疥瘡盛行率來決定。 Controlling scabies in institutional settings: a review of medications, treatment models, and implementation Control of an epidemic can only be achieved by treatment of the entire population at risk. In an outbreak of scabies in a nursing home, residents, staff, and frequent visitors should all be treated even if they are not symptomatic. The standard treatment for scabies is 5% permethrin cream. Ivermectin is useful in treating patients with Norwegian or crusted scabies, or who are debilitated. Only oral treatment, is not approved for scabies in the US. Controlling scabies in institutional settings: a review of medications, treatment models, and implementation Treatment Models to Stop Epidemics Model treatment plans to control scabies epidemics have been developed that involve treatment of staff, patients, and contacts. The plans include disinfection of the premises, clothing, and furniture. Treating asymptomatic bodily contacts of patients with scabies Patients who are first exposed to scabies often do not develop symptoms for several weeks. A well documented case report detailed the spread of scabies in a day care center, in which 21% of the staff and children were eventually infected. Prevention Due to long asymptomatic incubation period and high level of infectivity The standard treatment for scabies is 5% permethrin cream applied from the neck down. Alternatives include 1% lindane, which should be avoided in children and pregnant women. Scabies treatments Scabies Management in special circumstances For outbreaks in nursing homes or other communal living areas, a comprehensive approach becomes necessary. This includes mass screening of patients, staff, and support personnel; infection control measures (e.g. cleaning of linen, bed clothes), and treatment for infected individuals. In cases of hospitalized or institutionalized patients with Norwegian scabies, use contact isolation methods to prevent infection of other patients. Prognosis Scabies is generally treated successfully with one application of medication. Prevention Treat all close contacts Wash clothing and bedding of infectied people with hot water Conclusion 當爆發疥瘡(Scabies)感染時,許多文獻調查發現,只有治療感染者會造成控制失敗,因照護的醫療人員與這些病人為接觸最頻繁者,為預防再度傳染給它人及防止疫情的再度擴大,故建議可讓相關人員使用治療疥瘡之藥物。 Topical therapy-1 Benzyl benzoate 10–25% widely used in adults and also in diluted form for children, babies, and breastfeeding mothers. most common adverse event : initial severe burning sensation from local irritation. Topical therapy-2 Lindane (γ-benzene hexachloride ) widely prescribed topical scabicide because of its efficacy and cost-effectiveness. Appears to be most toxic scabicidal agent, but adverse effects more common in children and patient with extensive skin disease. remove by bathing after 8-12 hours Topical therapy-3 Crotamiton therapy of common scabies is recommended for newborn babies and infants . Apply thinly from neck down and massage nightly for 2 consecutive nights, and wash off 24 hours after second application Less effective than permethrin, similar efficacy to lindane Cost comparison 謝謝大家 !! Cost effectiveness Nosocomial scabies Infection control Prompt recognition of scabies followed by immediate implementation of preventive measures is the mainstay for the containment of a nosocomial outbreak. Treatment In a systemic review of 11 randomized trials comparing the effectiveness of various agents, no differences in clinical cure rates or adverse events were demonstrated. Permethrin may be preferable to lindane or crotamiton based on traditional reviews, professional opinions or on published experience with nosocomial outbreaks. Conclusions The onset of a nosocomial outbreak of scabies is associated with considerable morbidity and economic burden. Prompt recognition of cases, immediate implementation of infection control measures, simultaneous treatment of all contacts, and prolonged monitoring after the outbreak are of principal importance for its control. Evidence Evidence regarding the effectivess of permethrin vs lindane is conflicting. This systematic review found four RCTs comparing these agents. Two small trials found clinical cure at 28 days was greater with permethrin, but the other two RCTs, including the largest of the four trials, failed to show any significant difference in clinical outcome. Permethrin, however, to be more effective in controlling persistent itch (Level A)

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