Aerosol generating procedures (AGPs) may expose health care workers (HCWs) to pathogens causing acute respiratory infections (ARIs), but the risk of transmission of ARIs from AGPs is not fully known. We sought to determine the clinical evidence for the risk of transmission of ARIs to HCWs caring for patients undergoing AGPs compared with the risk of transmission to HCWs caring for patients not undergoing AGPs. We searched PubMed, EMBASE, MEDLINE, CINAHL, the Cochrane Library, University of York CRD databases, EuroScan, LILACS, Indian Medlars, Index Medicus for SE Asia, international health technology agencies and the Internet in all languages for articles from 01/01/1990 to 22/10/2010. Independent reviewers screened abstracts using pre-defined criteria, obtained full-text articles, selected relevant studies, and abstracted data. Disagreements were resolved by consensus. The outcome of interest was risk of ARI transmission. The quality of evidence was rated using the GRADE system. We identified 5 case-control and 5 retrospective cohort studies which evaluated transmission of SARS to HCWs. Procedures reported to present an increased risk of transmission included [n; pooled OR(95%CI)] tracheal intubation [n = 4 cohort; 6.6 (2.3, 18.9), and n = 4 case-control; 6.6 (4.1, 10.6)], non-invasive ventilation [n = 2 cohort; OR 3.1(1.4, 6.8)], tracheotomy [n = 1 case-control; 4.2 (1.5, 11.5)] and manual ventilation before intubation [n = 1 cohort; OR 2.8 (1.3, 6.4)]. Other intubation associated procedures, endotracheal aspiration, suction of body fluids, bronchoscopy, nebulizer treatment, administration of O2, high flow O2, manipulation of O2 mask or BiPAP mask, defibrillation, chest compressions, insertion of nasogastric tube, and collection of sputum were not significant. Our findings suggest that some procedures potentially capable of generating aerosols have been associated with increased risk of SARS transmission to HCWs or were a risk factor for transmission, with the most consistent association across multiple studies identified with tracheal intubation.

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Background: Physician adherence to hand hygiene remains low in most hospitals.Objectives: To identify risk factors for nonadherence and assess beliefs and perceptions associated with hand hygiene among physicians.Design: Cross-sectional survey of physician practices, beliefs, and attitudes toward hand hygiene.Setting: Large university hospital.Participants: 163 physicians.Measurements: Individual observation of physician hand hygiene practices during routine patient care with documentation of relevant risk factors; self-report questionnaire to measure beliefs and perceptions. Logistic regression identified variables independently associated with adherence.Results: Adherence averaged 57% and varied markedly across medical specialties. In multivariate analysis, adherence was associated with the awareness of being observed, the belief of being a role model for other colleagues, a positive attitude toward hand hygiene after patient contact, and easy access to hand-rub solution. Conversely, high workload, activities associated with a high risk for cross-transmission, and certain technical medical specialties (surgery, anesthesiology, emergency medicine, and intensive care medicine) were risk factors for nonadherence.Limitations: Direct observation of physicians may have influenced both adherence to hand hygiene and responses to the self-report questionnaire. Generalizability of study results requires additional testing in other health care settings and physician populations. H and hygiene is recognized as the leading measure to prevent cross-transmission of microorganisms and to reduce the incidence of health care-associated infections (1, 2). Despite the relative simplicity of this procedure, adherence to hand hygiene recommendations is unacceptably low, usually well below 50% (1-4). Risk factors for nonadherence have been extensively studied (1, 4 -7), and physicians have been repeatedly observed as being poor compliers (1,3,4,8,9). ConclusionAt our hospital, physician behavior did not improve substantially despite a hospital-wide hand hygiene promotion campaign that had a positive and marked effect on adherence among all other health care workers (1). That study highlighted the need for improved knowledge of behavior determinants among physicians.Promotion of hand hygiene behavior is a complex issue (7, 10 -12). Adherence to hand hygiene recommendations is influenced by knowledge; awareness of personal and group performance; workload; and type, tolerance, and accessibility of hand hygiene agents (2,4,12). Over the past 50 years in particular, the assumption that an individual's perceptions have a strong effect on his or her behavior gave birth to social cognitive models of human behavior (13). Some of these models have been applied to individual factors (that is, knowledge, attitude, intentions, beliefs, and perceptions) to help build strategies that improve specific health behaviors (14). To date, individual cognitive factors related to hand hygiene have not been adequately studied among physicians. Our study aim...

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Hand hygiene promotion, guided by health care workers' perceptions, identification of the dynamics of bacterial contamination of health care workers' hands, and performance feedback, is effective in sustaining compliance improvement and is independently associated with infection risk reduction among high-risk neonates.