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Cheetham S, Ngo HT, Liira J, Liira H. Education and training for preventing sharps injuries and splash exposures in healthcare workers. Cochrane Database Syst Rev 2021; 4:CD012060. [PMID: 33871067 PMCID: PMC8094230 DOI: 10.1002/14651858.cd012060.pub2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND In healthcare settings, health care workers (HCWs) are at risk of acquiring infectious diseases through sharps injuries and splash exposures to blood or bodily fluids. Education and training interventions are widely used to protect workers' health and safety and to prevent sharps injuries. In certain countries, they are part of obligatory professional development for HCWs. OBJECTIVES To assess the effects of education and training interventions compared to no intervention or alternative interventions for preventing sharps injuries and splash exposures in HCWs. SEARCH METHODS We searched CENTRAL, MEDLINE, Embase, NHSEED, Science Citation Index Expanded, CINAHL and OSH-update (from all time until February 2016). In addition, we searched the databases of Global Health, AustHealth and Web of Science (from all time until February 2016). The original search strategy was re-run in November 2019, and again in February 2020. In April 2020, the search strategy was updated and run in CINAHL, MEDLINE, Scopus and Web of Science (from 2016 to current). SELECTION CRITERIA We considered randomized controlled trials (RCTs), cluster-randomized trials (cluster-RCTs), controlled clinical trials (CCTs), interrupted time series (ITS) study designs, and controlled before-and-after studies (CBA), that evaluated the effect of education and training interventions on the incidence of sharps injuries and splash exposures compared to no-intervention. DATA COLLECTION AND ANALYSIS Two authors (SC, HL) independently selected studies, and extracted data for the included studies. Studies were analyzed, risk of bias assessed (HL, JL) , and pooled using random-effect meta-analysis, where applicable, according to their design types. As primary outcome we looked for sharps injuries and splash exposures and calculated them as incidence of injuries per 1000 health care workers per year. For the quality of evidence we applied GRADE for the main outcomes. MAIN RESULTS Seven studies met our inclusion criteria: one cluster-RCT, three CCTs, and three ITS studies. The baseline rates of sharps injuries varied from 43 to 203 injuries per 1000 HCWs per year in studies with hospital registry systems. In questionnaire-based studies, the rates of sharps injuries were higher, from 1800 to 7000 injuries per 1000 HCWs per year. The majority of studies utilised a combination of education and training interventions, including interactive demonstrations, educational presentations, web-based information systems, and marketing tools which we found similar enough to be combined. In the only cluster-RCT (n=796) from a high-income country, the single session educational workshop decreased sharps injuries at 12 months follow-up, but this was not statistically significant either measured as registry-based reporting of injuries (RR 0.46, 95% CI 0.16 to 1.30, low-quality evidence) or as self-reported injuries (RR 0.41, 95% CI 0.14 to 1.21, very low-quality evidence) In three CCTs educational interventions decreased sharps injuries at two months follow-up (RR 0.68, 95% CI 0.48 to 0.95, 330 participants, very low-quality evidence). In the meta-analysis of two ITS studies with a similar injury rate, (N=2104), the injury rate decreased immediately post-intervention by 9.3 injuries per 1000 HCWs per year (95% CI -14.9 to -3.8). There was a small non-significant decrease in trend over time post-intervention of 2.3 injuries per 1000 HCWs per year (95% CI -12.4 to 7.8, low-quality evidence). One ITS study (n=255) had a seven-fold higher injury rate compared to the other two ITS studies and only three data points before and after the intervention. The study reported a change in injury rate of 77 injuries per 1000 HCWs (95% CI -117.2 to -37.1, very low-quality evidence) immediately after the intervention, and a decrease in trend post-intervention of 32.5 injuries per 1000 HCWs per year (95% CI -49.6 to -15.4, very low quality evidence). None of the studies allowed analyses of splash exposures separately from sharps injuries. None of the studies reported rates of blood-borne infections in patients or staff. There was very low-quality evidence of short-term positive changes in process outcomes such as knowledge in sharps injuries and behaviors related to injury prevention. AUTHORS' CONCLUSIONS: We found low- to very low-quality evidence that education and training interventions may cause small decreases in the incidence of sharps injuries two to twelve months after the intervention. There was very low-quality evidence that educational interventions may improve knowledge and behaviors related to sharps injuries in the short term but we are uncertain of this effect. Future studies should focus on developing valid measures of sharps injuries for reliable monitoring. Developing educational interventions in high-risk settings is another priority.
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Affiliation(s)
- Shelley Cheetham
- Medical School, The University of Western Australia, Perth, Australia
| | - Hanh Tt Ngo
- School of Primary, Aboriginal and Rural Health Care, The University of Western Australia, Crawley, Australia
| | - Juha Liira
- Research and Development in Occupational Health Services, Finnish Institute of Occupational Health, Helsinki, Finland
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Fritzsche C, Heine M, Loebermann M, Klammt S, Podbielski A, Mittlmeier T, Reisinger EC. Reducing the underreporting of percutaneous exposure incidents: A single-center experience. Am J Infect Control 2016; 44:941-3. [PMID: 27125915 DOI: 10.1016/j.ajic.2016.02.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Revised: 01/28/2016] [Accepted: 02/01/2016] [Indexed: 10/21/2022]
Abstract
Although risk reduction strategies have been implemented throughout the world, underreporting of percutaneous exposure incidents (PEIs) is common among exposed health care workers. The aim of this study was to determine the incidence rate of reported PEIs before and after implementation of an intensified reporting management policy. The introduction of an intensified reporting system led to significantly increased reporting after a PEI has occurred. However, continuous education needs to be provided to improve awareness.
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Tarigan LH, Cifuentes M, Quinn M, Kriebel D. Prevention of needle-stick injuries in healthcare facilities: a meta-analysis. Infect Control Hosp Epidemiol 2015; 36:823-9. [PMID: 25765502 DOI: 10.1017/ice.2015.50] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To estimate the summary effectiveness of different needle-stick injury (NSI)-prevention interventions. DESIGN We conducted a meta-analysis of English-language articles evaluating methods for reducing needle stick, sharp, or percutaneous injuries published from 2002 to 2012 identified using PubMed and Medline EBSCO databases. Data were extracted using a standardized instrument. Random effects models were used to estimate the summary effectiveness of 3 interventions: training alone, safety-engineered devices (SEDs) alone, and the combination of training and SEDs. SETTING Healthcare facilities, mainly hospitals PARTICIPANTS Healthcare workers including physicians, midwives, and nurses RESULTS From an initial pool of 250 potentially relevant studies, 17 studies met our inclusion criteria. Six eligible studies evaluated the effectiveness of training interventions, and the summary effect of the training intervention was 0.66 (95% CI, 0.50-0.89). The summary effect across the 5 studies that assessed the efficacy of SEDs was 0.51 (95% CI, 0.40-0.64). A total of 8 studies evaluated the effectiveness of training plus SEDs, with a summary effect of 0.38 (95% CI, 0.28-0.50). CONCLUSION Training combined with SEDs can substantially reduce the risk of NSIs.
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Affiliation(s)
- Lukman H Tarigan
- 1Department of Epidemiology,School of Public Health University of Indonesia,Depok,West Java,Indonesia
| | - Manuel Cifuentes
- 2Department of Work Environment,College of Health Sciences University of Massachusetts Lowell,Lowell,Massachusetts,USA
| | - Margaret Quinn
- 2Department of Work Environment,College of Health Sciences University of Massachusetts Lowell,Lowell,Massachusetts,USA
| | - David Kriebel
- 2Department of Work Environment,College of Health Sciences University of Massachusetts Lowell,Lowell,Massachusetts,USA
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Treakle AM, Schultz M, Giannakos GP, Joyce PC, Gordin FM. Evaluating a Decade of Exposures to Blood and Body Fluids in an Inner-City Teaching Hospital. Infect Control Hosp Epidemiol 2015; 32:903-7. [DOI: 10.1086/661281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objective.To analyze a decade of hospital staff and student exposures to blood and body fluids (BBF) and to identify risk factors relevant to prevention strategies.Design.Retrospective review of a 1999–2008 data set of BBF exposures. The data, maintained by occupational health staff, detailed the type of exposure, the setting in which the exposure occurred, and the occupational group of the BBF-exposed personnel.Setting.Washington DC Veterans Affairs Medical Center (VA-DC), an inner-city tertiary care hospital.Participants.All healthcare workers and staff at the VA-DC.Methods.Review of database.Results.A review of 10 years of data revealed 564 occupational exposures to BBF, of which 66% were caused by needlesticks and 20% were caused by sharp objects. Exposures occurred most often in the acute care setting (which accounted for 39% of exposures) and the operating room (which accounted for 22%). There was a mean of 4.9 exposures per 10,000 acute care patient-days, 0.5 exposures per 10,000 long-term care patient-days, and 0.35 exposures per 10,000 outpatient visits. Housestaff accounted for the highest number of all exposures (196 [35%]). There were, on average, 15.2 exposures per 100 housestaff full-time equivalents. An average of only 1 exposure per year occurred in the hemodialysis center.Conclusions.Occupational exposures to BBF remain common, but rates vary widely by setting and occupational group. Overall rates are steady across a decade, despite the use of various antiexposure devices and provider education programs. Targeting occupational groups and hospital settings that have been shown to have the highest risk rates should become foundational to future preventative strategies.
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Cornwall J. The "hands together" method of nonsterile scalpel blade mounting and removal. ANATOMICAL SCIENCES EDUCATION 2014; 7:161-166. [PMID: 24150922 DOI: 10.1002/ase.1414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 07/15/2013] [Accepted: 09/29/2013] [Indexed: 06/02/2023]
Abstract
Scalpels are utilized by many different user groups for such purposes as medical procedures and dissection. Injuries caused by scalpels are a potential risk for scalpel users, and include injuries that may occur while mounting and removing the scalpel blade. Between 10% and 20% of all scalpel injuries in education and healthcare settings are reported to occur while scalpel blades are being mounted or removed. At present there are few published or "best practice" demonstrations of safe technique for scalpel blade mounting and removal. This brief article outlines a variation of the procedure for scalpel blade mounting and removal. It includes strategies developed to minimize risk or injury for the scalpel user, including providing a stable base for the hands and arms so as to prevent unnecessary large amplitude movements that may lead to injury of the scalpel user or a third party. Such a technique may promote scalpel safety, contribute to the development of "best practice" scalpel use, and help decrease injuries that may be caused while mounting or removing scalpel blades.
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Affiliation(s)
- Jon Cornwall
- Faculty of Law, University of Otago, Dunedin, New Zealand; Department of Anatomy, University of Otago, Dunedin, New Zealand
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Affiliation(s)
- Nuala B. Porteous
- Department of Comprehensive Dentistry; University of Texas Health Science Center at San Antonio Dental School
| | - Eamon Bizra
- University of Texas Health Science Center at San Antonio Dental School at the time of this study
| | - Annaliese Cothron
- University of Texas Health Science Center at San Antonio Dental School
| | - Chih-Ko Yeh
- University of Texas Health Science Center at San Antonio Dental School and Senior Research Scientist, Geriatric Research, Education, and Clinical Center at San Antonio; Audie Murphy Division; South Texas Veterans Health Care System
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Menezes JA, Bandeira CS, Quintana M, de Lima E Silva JCA, Calvet GA, Brasil P. Impact of a single safety-engineered device on the occurrence of percutaneous injuries in a general hospital in Brazil. Am J Infect Control 2014; 42:174-7. [PMID: 24360640 DOI: 10.1016/j.ajic.2013.07.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/19/2013] [Accepted: 07/22/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND Health care workers are exposed to bloodborne pathogens through occupational injuries, and the replacement of sharps by safety-engineered devices has been recommended as a key preventive measure. This recommendation has been difficult to implement in Brazil. METHODS We conducted a retrospective study of selected data from a database of blood and body fluid exposures reported from January 2007 through December 2011 in a public general hospital in Rio de Janeiro where, from the end of 2009, a safety lancet for blood glucose testing (BGT) was introduced. A log-binomial model was used to evaluate the effect of the introduction of the safety lancet on the proportion of percutaneous injuries (PIs) during BGT in the nursing staff. RESULTS Nursing staff had a significant reduction in rate of PIs per 100 full-time equivalents from 2007 to 2011 (P < .001), and medical residents had the highest rate throughout the same period. A reduction of PIs by small-gauge needles was observed since 2009, and injuries during BGT fell abruptly in 2010 and 2011 paralleling the number of purchased safety lancets (P < .001). CONCLUSION The adoption of a single safety device, which required no training, significantly reduced PIs among the nursing team.
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Affiliation(s)
- Jacqueline A Menezes
- Department of Infectious Diseases, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil.
| | - Carolina S Bandeira
- Department of Infectious Diseases, Hospital Federal dos Servidores do Estado, Rio de Janeiro, Brazil
| | - Marcel Quintana
- Statisticians, Department of Technical Support for Clinical Research, Instituto de Pesquisa Clínica Evandro Chagas, FIOCRUZ, Rio de Janeiro, Brazil
| | - Julio C A de Lima E Silva
- Statisticians, Department of Technical Support for Clinical Research, Instituto de Pesquisa Clínica Evandro Chagas, FIOCRUZ, Rio de Janeiro, Brazil
| | - Guilherme A Calvet
- Medical Researchers, Instituto de Pesquisa Clínica Evandro Chagas, FIOCRUZ, Rio de Janeiro, Brazil
| | - Patrícia Brasil
- Medical Researchers, Instituto de Pesquisa Clínica Evandro Chagas, FIOCRUZ, Rio de Janeiro, Brazil
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Sedky NA. Occupational bloodborne exposure incident survey & management of exposure incidents in a dental teaching environment. Int J Health Sci (Qassim) 2014; 7:174-90. [PMID: 24421746 DOI: 10.12816/0006041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES The purpose of this study was to investigate the prevalence of occupational exposure incidents among undergraduate dental students and the factors associated with it in the educational dental clinics at Pharos University in Alexandria - Egypt, and to measure the commitment with applying infection control policy in the form of compliance with post-exposure management protocol and reporting exposure incidents. MATERIALS AND METHODS An anonymous self-administered questionnaire consisting of thirteen multiple-choice questions was distributed among 350 undergraduate dental students in mid-senior and senior levels during lectures at the end of the second semester of 2011, with a response rate of 90.00%. RESULTS About 62.00% of the senior students reported that exposures occurred outside the patient's mouth. A high percentage of both the mid-senior and senior students (74.70% and 70.70%, respectively) reported that they were exposed to multiple sources of incidents. The vast majority of studied groups stated that they didn't follow Infection Control Protocol after Incident Exposure. CONCLUSION The findings of this study confirm that dental students experience exposure incidents but are not likely to report them, thus it is important that the principles of infection control training and reporting of all exposure incidents continue to be emphasized throughout undergraduate dental education.
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Affiliation(s)
- Nabila A Sedky
- Assist. Prof. of Community and Preventive Dentistry, Faculty of Dentistry, Qassim University. Saudi Arabia
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Occupational exposure to blood and body fluids in a department of oral sciences: results of a thirteen-year surveillance study. ScientificWorldJournal 2013; 2013:459281. [PMID: 23476136 PMCID: PMC3586493 DOI: 10.1155/2013/459281] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 01/02/2013] [Indexed: 11/17/2022] Open
Abstract
Objectives. Aim of this analysis was to identify trends that will aid in the prevention of injury. Methods. Our data were collected from 1999 to 2011 during a surveillance program of occupational exposures to blood or other potentially infectious materials in a Dental School by using a standard coded protocol. Results. 63 exposures were reported. 56/63 (89%) percutaneous and 7/63 (11%) mucosal, involving a splash to the eye of the dental care workers (DCW). 25/63 (40%) involved students, 23/63 (36%) DCW attending masters and doctorate, 13/63 (21%) DCW attending as tutors and 2/63 (3%) staff. 45/63 (71%) and 18/63 (29%) occurred respectively during and after the use of the device; of last ones, 1/18 (0.05%) were related to instrument clean-up and 1/18 (0.05%) to laboratory activity, 12/18 (67%) occurred when a DCW collided with a sharp object during the setting, and 4/18 (22%) during other activities. The instrument and the body part most likely involved were needle and finger respectively. The overall exposure rate was 4.78 per 10,000 patient visits. Conclusions Our results may serve as benchmark that Dental Schools can employ to assess their frequency of injury.
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The comparison of sharps injuries reported by doctors versus nurses from surgical wards in the context of the prevalence of HBV, HCV and HIV infections. POLISH JOURNAL OF SURGERY 2012; 84:190-5. [PMID: 22698656 DOI: 10.2478/v10035-012-0031-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
UNLABELLED The aim of the study was to evaluate the nature and frequency of sharps injuries among doctors and nurses from the same surgical/gynecological wards and the prevalence of HBV/HCV/HIV infection. MATERIAL AND METHODS An anonymous cross-sectional sero-survey, with ELISA system used to detect anti-HBc, anti-HCV, anti-HIV, was conducted among 89 doctors and 414 nurses from 16 randomly selected hospitals in West Pomerania, Poland, between January-June 2009. RESULTS During the preceding 12 months, 82% doctors and 44.4% nurses (p<0.0001) had sustained at least one sharps injury; 12.3% doctors vs 2.2% nurses (p<0.003) sustained more than 10 injuries. The multivariable regression model revealed that being a doctor was associated with a greater odds (OR 4.2) of being injured with sharps. Sixty nine percent of nurses sustained a hollow-bore needle injury vs 8.9% doctors; p<0.001. Anti-HBc were found in 16.4% of doctors and 11.2% of nurses, p>0.28; anti-HCV - in 1.1% of doctors vs 1.4% of nurses, p>0.79; no anti-HIV positive cases were found. The analysis of potential risk factors for contracting a HBV revealed that for both job categories only length of employment was associated with an increased odds of being infected. CONCLUSIONS Although the prevalence of HBV/HCV infection between doctors and nurses does not differ significantly, modifiable risk factors for contracting a BBI such as frequency and nature of sharps injuries may differ, which call for tailoring preventive measures to specific job categories. Long lasting exposure to injury events should be taken into consideration while assessing the risk for accuiring an occupational infection with HBV, HCV or HIV.
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Zarra T, Lambrianidis T. Percutaneous injuries amongst Greek endodontists: a national questionnaire survey. Int Endod J 2012; 46:264-74. [DOI: 10.1111/j.1365-2591.2012.02126.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Accepted: 08/03/2012] [Indexed: 11/28/2022]
Affiliation(s)
- T. Zarra
- Department of Endodontology; Dental School; Aristotle University of Thessaloniki; Thessaloniki; Greece
| | - T. Lambrianidis
- Department of Endodontology; Dental School; Aristotle University of Thessaloniki; Thessaloniki; Greece
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Gaballah K, Warbuton D, Sihmbly K, Renton T. Needle stick injuries among dental students: risk factors and recommendations for prevention. Libyan J Med 2012; 7:LJM-7-17507. [PMID: 22741025 PMCID: PMC3384083 DOI: 10.3402/ljm.v7i0.17507] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 05/05/2012] [Indexed: 11/28/2022] Open
Abstract
Aim To evaluate the risk factors of needle stick injuries (NSIs) sustained by undergraduate dental students and nurse students at the King's College London (KCL) Dental Institute. Materials and methods A retrospective study evaluated the incident reports relating to NSIs reported over a period of 2 years. Factors including the dental department, study year, and when the injury took place during administration of local anaesthesia (LA) and recapping conventional syringe or clearing work surface or during disposal. Results This report showed that students are at the highest risk of NSIs at the fourth year of their 5-year BDS course. About one-third of injuries were reported among this group of students followed by year 5 students (25%). Oral surgery clinics were the major source of incident reporting when compared with other specialised dental clinics within the institute. The left hands of the students were the most frequently affected by such injuries and then the right hands of student dental nurses. The attempt of needle recapping of conventional syringes was the least reported mechanism of injuries and constituted only 15% of the total injuries and mainly occurred in third year students. The most frequent injuries among student nurses were during disposal of the needle. Conclusion Less NSIs occur when using safety syringes. A non-recapping policy with immediate disposal of either the conventional or safety syringe systems after injection would prevent all clearance-related NSIs sustained by nurses. To avoid NSIs, education plays a vital role particularly with effective implementation of the change to safety syringes with appropriate training.
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Affiliation(s)
- Kamis Gaballah
- Department of Oral Surgery, King's College London Dental Institute, London, UK
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Kumar N, Sharma P, Jain S. Needle stick injuries during fine needle aspiration procedure: Frequency, causes and knowledge, attitude and practices of cytopathologists. J Cytol 2011; 28:49-53. [PMID: 21713146 PMCID: PMC3111707 DOI: 10.4103/0970-9371.80727] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Background: There is no study available on the frequency, predisposing factors and outcome of needle stick injury (NSI) in cytopathologists who perform fine needle aspiration (FNA). Aim: To know the frequency, circumstances and sequlae of NSI sustained by cytopathologists, assess their knowledge about risks of NSI and attitudes and practices towards use of standard precautions and post-injury wound care. Materials and Methods: Study design: cross sectional. Setting: Tertiary care teaching and non-teaching hospitals and private laboratories. Data collection method: Knowledge, attitude and practices survey using a questionnaire. Results: Majority (90.5%) of the respondents have had NSI in their total career. In the previous year, more than half (71.4%) had at least one NSI (mean 3.2). NSI was the most common in index finger of non-dominant hand (59.6%) and occurred during step two of FNA procedure when the needle was being manipulated within the lump. The major predisposing factors were uncooperative patients (88.9%), small children (54%), deep masses (36.5%), hot humid climate (88.9%), heavy workload (76.2%) and poor administrative arrangement (54%). The adherence to standard precautions was not optimal (74.6%). None of them reported NSI to the authorities, nor investigated source patient or themselves. 82.5% of the respondents were not aware of any formal exposure reporting system in their hospital. Conclusion: Cytopathologists frequently experience NSI while performing FNA. Frequency of injury is also related to patient characteristics and work site factors. Education and motivation for adhering to standard precautions and post-exposure prophylaxis are often lacking.
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Affiliation(s)
- Neeta Kumar
- Department of Pathology, Maulana Azad Medical College and Lok Nayak Hospital, New Delhi, India
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Brusaferro S, Calligaris L, Farneti F, Gubian F, Londero C, Baldo V. Educational programmes and sharps injuries in health care workers. Occup Med (Lond) 2009; 59:512-4. [PMID: 19706644 DOI: 10.1093/occmed/kqp112] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Sharps injuries in health care personnel still represent a significant problem worldwide. Many studies show a reduction in sharps injuries following the introduction and use of different protection devices, but few studies focus on the role of training programmes in the prevention of such injuries. AIMS To analyse the influence of training programmes on sharps injuries in health care workers (HCW). METHODS The study was carried out in a 350-bed university hospital in north-eastern Italy with 700 HCW. Training courses on biological risk for physicians, nurses, ancillary operators and laboratory technicians have been in place since 1998. Data on all sharps injuries reported by HCW between 1998 and 2006 were analysed together with information on HCW who attended the training courses. RESULTS Between 1998 and 2006, there was a reduction in the incidence of sharps injuries from 11 to 4% (P < 0.01). During the same period, the number of trained HCW increased from 26 to 69% (P < 0.01). Trained personnel had a statistically significant lower relative risk (RR) for injury with RR = 0.06 (95% CI 0.02-0.18). CONCLUSIONS A continuous educational effort for HCW leads to a reduction of sharps injuries.
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Affiliation(s)
- S Brusaferro
- Department of Experimental and Clinical Pathology and Medicine, University of Udine, Udine, Italy
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Wicker S, Rabenau HF. Occupational exposures to bloodborne viruses among German dental professionals and students in a clinical setting. Int Arch Occup Environ Health 2009; 83:77-83. [PMID: 19626335 DOI: 10.1007/s00420-009-0452-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2008] [Accepted: 07/08/2009] [Indexed: 10/20/2022]
Abstract
PURPOSE Exposures to bloodborne pathogens pose a serious risk to dental healthcare workers (DHCW). Despite improved methods of preventing exposures like needlestick injuries (NSI), occupational exposures still continue to occur. The purpose of this study was to evaluate the incidence of occupational exposures to patient body fluids among German DHCW, to assess the rate of reporting of such incidents, and to evaluate the association of various factors with these exposures. METHODS Data was obtained through an anonymous questionnaire. RESULTS Our study confirms that occupational skills are an important factor concerning NSI. It turned out that dental students (0.74 NSI p. a.) had nearly twice the number of NSI compared with dentists with more or less than 10 years working experience (0.42, 0.49 NSI p. a., respectively, P < 0.0001). Overall, 54.3% (n = 144/265) of respondents had sustained at least one NSI in their professional life. Only 28.5% of injured dental students and DHCW reported all of their NSI, the main reason (19.1%) for not reporting NSI was little or no perception of risk on behalf of the respondent. One-fourth of respondents were not wearing a mask and 55.6% were not wearing protective goggles during their last occupational exposures. CONCLUSIONS Occupational exposure to blood or body fluids is a common problem among DHCW and dental students. Measures must be adopted by official institutions, public health service, occupational health association and universities in order to reverse this situation.
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Affiliation(s)
- Sabine Wicker
- Occupational Health Service, Hospital of the Johann Wolfgang Goethe-University of Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany.
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The national study to prevent blood exposure in paramedics: rates of exposure to blood. Int Arch Occup Environ Health 2009; 83:191-9. [PMID: 19437031 DOI: 10.1007/s00420-009-0421-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Accepted: 04/22/2009] [Indexed: 10/20/2022]
Abstract
OBJECTIVE The purpose of this analysis is to present incidence rates of exposure to blood among paramedics in the United States by selected variables and to compare all percutaneous exposure rates among different types of healthcare workers. METHODS A survey on blood exposure was mailed in 2002-2003 to a national sample of paramedics. Results for California paramedics were analyzed with the national sample and also separately. RESULTS The incidence rate for needlestick/lancet injuries was 100/1,000 employee-years [95% confidence interval (CI), 40-159] among the national sample and 26/1,000 employee-years (95% CI, 15-38) for the California sample. The highest exposure rate was for non-intact skin, 230/1,000 employee-years (95% CI, 130-329). The rate for all exposures was 465/1,000 employee-years (95% CI, 293-637). California needlestick/lancet rates, but not national, were substantially lower than rates in earlier studies of paramedics. Rates for all percutaneous injuries among paramedics were similar to the mid to high range of rates reported for most hospital-based healthcare workers. CONCLUSIONS Paramedics in the United States are experiencing percutaneous injury rates at least as high as, and possibly substantially higher than, most hospital-based healthcare workers, as well as substantially higher rates of exposure to blood on non-intact skin.
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Campins M, Torres M, Varela P, López Clemente V, Gascó A, de la Prada M, Espuga M, Tapias G, Peña P, Hermosilla E, Otero S, Bastida T, Sanz P, María Bayas J, Serra C. Accidentes biológicos percutáneos en el personal sanitario: análisis de factores de riesgo no prevenibles mediante precauciones estándares. Med Clin (Barc) 2009; 132:251-8. [DOI: 10.1016/j.medcli.2008.06.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Accepted: 06/27/2008] [Indexed: 10/20/2022]
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Machado-Carvalhais HP, Ramos-Jorge ML, Auad SM, Martins LH, Paiva SM, Pordeus IA. Occupational Exposure to Potentially Infectious Biological Material in a Dental Teaching Environment. J Dent Educ 2008. [DOI: 10.1002/j.0022-0337.2008.72.10.tb04599.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Maria L. Ramos-Jorge
- Department of Pediatric Dentistry and Orthodontics; Federal University of Minas Gerais; Brazil
| | - Sheyla M. Auad
- Department of Pediatric Dentistry and Orthodontics; Federal University of Minas Gerais; Brazil
| | - Laura H.P.M. Martins
- Department of Pediatric Dentistry and Orthodontics; Federal University of Minas Gerais; Brazil
| | - Saul M. Paiva
- Department of Pediatric Dentistry and Orthodontics; Federal University of Minas Gerais; Brazil
| | - Isabela A. Pordeus
- Department of Pediatric Dentistry and Orthodontics; Federal University of Minas Gerais; Brazil
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Valls V, Lozano MS, Yánez R, Martínez MJ, Pascual F, Lloret J, Ruiz JA. Use of safety devices and the prevention of percutaneous injuries among healthcare workers. Infect Control Hosp Epidemiol 2007; 28:1352-60. [PMID: 17994515 DOI: 10.1086/523275] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Accepted: 07/06/2007] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To study the effectiveness of safety devices intended to prevent percutaneous injuries.Design. Quasi-experimental trial with before-and-after intervention evaluation. SETTING A 350-bed general hospital that has had an ongoing educational program for the prevention of percutaneous injuries since January 2002. METHODS In October 2005, we implemented a program for the use of engineered devices to prevent percutaneous injury in the emergency department and half of the hospital wards during the following procedures: intravascular catheterization, vacuum phlebotomy, blood-gas sampling, finger-stick blood sampling, and intramuscular and subcutaneous injections. The nurses in the wards that participated in the intervention received a 3-hour course on occupationally acquired bloodborne infections, and they had a 2-hour "hands-on" training session with the devices. We studied the percutaneous injury rate and the direct cost during the preintervention period (October 2004 through March 2005) and the intervention period (October 2005 through March 2006). RESULTS We observed a 93% reduction in the relative risk of percutaneous injuries in areas where safety devices were used (14 vs 1 percutaneous injury). Specifically, rates decreased from 18.3 injuries (95% confidence interval [CI], 5.9-43.2 injuries) to 0 injuries per 100,000 patients in the emergency department (P=.002) and from 44.0 injuries (95% CI, 20.1-83.6 injuries) to 5.2 injuries (95% CI, 0.1-28.8 injuries) per 100,000 patient-days in hospital wards (P=.007). In the control wards of the hospital (ie, those where the intervention was not implemented), rates remained stable. The direct cost increase was 0.558 euros (US$0.753) per patient in the emergency department and 0.636 euros (US$0.858) per patient-day in the hospital wards. CONCLUSION Proper use of engineered devices to prevent percutaneous injury is a highly effective measure to prevent these injuries among healthcare workers. However, education and training are the keys to achieving the greatest preventative effect.
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Affiliation(s)
- Victoria Valls
- Servicio de Medicina Preventiva, Hospital Virgen de Salud-Elda, Alicante, Spain.
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Machado-Carvalhais HP, Martins TCP, Ramos-Jorge ML, Magela-Machado D, Paiva SM, Pordeus IA. Management of Occupational Bloodborne Exposure in a Dental Teaching Environment. J Dent Educ 2007. [DOI: 10.1002/j.0022-0337.2007.71.10.tb04399.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Saul M. Paiva
- Department of Pediatric Dentistry and Orthodontic; Federal University of Minas Gerais; Brazil
| | - Isabela A. Pordeus
- Department of Pediatric Dentistry and Orthodontic; Federal University of Minas Gerais; Brazil
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Falagas ME, Karydis I, Kostogiannou I. Percutaneous exposure incidents of the health care personnel in a newly founded tertiary hospital: a prospective study. PLoS One 2007; 2:e194. [PMID: 17332844 PMCID: PMC1805815 DOI: 10.1371/journal.pone.0000194] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2006] [Accepted: 01/17/2007] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Percutaneous exposure incidents (PEIs) and blood splashes on the skin of health care workers are a major concern, since they expose susceptible employees to the risk of infectious diseases. We undertook this study in order to estimate the overall incidence of such injuries in a newly founded tertiary hospital, and to evaluate possible changes in their incidence over time. METHODOLOGY/PRINCIPAL FINDINGS We prospectively studied the PEIs and blood splashes on the skin of employees in a newly founded (October 2000) tertiary hospital in Athens, Greece, while a vaccination program against hepatitis B virus, as well as educational activities for avoidance of injuries, were taking place. The study period ranged from October 1, 2002 to February 28, 2005. Serologic studies for hepatitis B (HBV) and C virus (HCV) as well as human immunodeficiency virus (HIV) were performed in all injured employees and the source patients, when known. High-titer immunoglobulin (250 IU anti-HBs intramuscularly) and HBV vaccination were given to non-vaccinated or previously vaccinated but serologically non-responders after exposure. Statistical analysis of the data was performed using Mc Nemar's and Fisher's tests. 60 needlestick, 11 sharp injuries, and two splashes leading to exposure of the skin or mucosa to blood were reported during the study period in 71 nurses and two members of the cleaning staff. The overall incidence (percutaneous injuries and splashes) per 100 full-time employment-years (100 FTEYs) for high-risk personnel (nursing, medical, and cleaning staff) was 3.48, whereas the incidence of percutaneous injuries (needlestick and sharp injuries) alone per 100 FTEYs was 3.38. A higher incidence of injuries was noted during the first than in the second half of the study period (4.67 versus 2.29 per 100 FTEYs, p = 0.005). No source patient was found positive for HCV or HIV. The use of high-titer immunoglobulin after adjustment for the incidence of injuries was higher in the first than in the second half of the study period, although the difference was not statistically significant [9/49 (18.37%) vs 1/24 (4.17%), p = 0.15]. CONCLUSIONS/SIGNIFICANCE Our data show that nurses are the healthcare worker group that reports most of PEIs. Doctors did not report such injuries during the study period in our setting. However, the possibility of even relatively frequent PEIs in doctors cannot be excluded. This is due to underreporting of such events that has been previously described for physicians and surgeons. A decrease of the incidence of PEIs occurred during the operation of this newly founded hospital.
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MESH Headings
- Accidents, Occupational/prevention & control
- Accidents, Occupational/statistics & numerical data
- Blood
- Blood-Borne Pathogens
- Female
- Greece
- HIV Infections/epidemiology
- HIV Infections/prevention & control
- HIV Infections/transmission
- Hazardous Substances
- Hepatitis B/epidemiology
- Hepatitis B/prevention & control
- Hepatitis B/transmission
- Hepatitis B Vaccines
- Hepatitis C/epidemiology
- Hepatitis C/prevention & control
- Hepatitis C/transmission
- Hospitals, Special/organization & administration
- Hospitals, Special/statistics & numerical data
- Housekeeping, Hospital
- Humans
- Immunization, Passive
- Incidence
- Infectious Disease Transmission, Patient-to-Professional/prevention & control
- Infectious Disease Transmission, Patient-to-Professional/statistics & numerical data
- Male
- Needlestick Injuries/epidemiology
- Needlestick Injuries/prevention & control
- Needlestick Injuries/therapy
- Nursing Staff, Hospital
- Occupational Exposure/prevention & control
- Personnel, Hospital
- Prospective Studies
- Risk Management
- Safety Management
- Vaccination
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Cleveland JL, Barker LK, Cuny EJ, Panlilio AL. Preventing percutaneous injuries among dental health care personnel. J Am Dent Assoc 2007; 138:169-78; quiz 247-8. [PMID: 17272371 DOI: 10.14219/jada.archive.2007.0133] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND The Occupational Safety and Health Administration and the Centers for Disease Control and Prevention (CDC) recommend that health care personnel (HCP) adopt safer work practices and consider using medical devices with safety features. This article describes the circumstances of percutaneous injuries among a sample of hospital-based dental HCP and estimates the preventability of a subset of these injuries: needlesticks. METHODS The authors analyzed percutaneous injuries reported by dental HCP in the CDC's National Surveillance System for Health Care Workers (NaSH) from December 1995 through August 2004 to describe the circumstances. RESULTS Of 360 percutaneous injuries, 36 percent were reported by dentists, 34 percent by oral surgeons, 22 percent by dental assistants, and 4 percent each by hygienists and students. Almost 25 percent involved anesthetic syringe needles. Of 87 needlestick injuries, 53 percent occurred after needle use and during activities in which a safety feature could have been activated (such as during passing and handling) or a safer work practice used. CONCLUSIONS NaSH data show that needlestick injuries still occur and that a majority occur at a point in the workflow at which safety syringes--in addition to safe work practices and recapping systems--could contribute to injury prevention. CLINICAL IMPLICATIONS All dental practices should have a comprehensive written program for preventing needlestick injuries that describes procedures for identifying, screening and, when appropriate, adopting safety devices; mechanisms for reporting and providing medical follow-up for percutaneous injuries; and a system for training staff members in safe work practices and the proper use of safety devices.
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Affiliation(s)
- Jennifer L Cleveland
- Division of Oral Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA.
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Shah SM, Merchant AT, Dosman JA. Percutaneous injuries among dental professionals in Washington State. BMC Public Health 2006; 6:269. [PMID: 17074095 PMCID: PMC1635049 DOI: 10.1186/1471-2458-6-269] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2006] [Accepted: 10/30/2006] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Percutaneous exposure incidents facilitate transmission of bloodborne pathogens such as human immunodeficiency virus (HIV), hepatitis C virus (HCV) and hepatitis B virus (HBV). This study was conducted to identify the circumstances and equipment related to percutaneous injuries among dental professionals. METHODS We used workers' compensation claims submitted to the Department of Labor and Industries State Fund during a 7-year period (1995 through 2001) in Washington State for this study. We used the statement submitted by the injured worker on the workers' compensation claim form to determine the circumstances surrounding the injury including the type of activity and device involved. RESULTS Of a total of 4,695 accepted State Fund percutaneous injury claims by health care workers (HCWs), 924 (20%) were submitted by dental professionals. Out of 924 percutaneous injuries reported by dental professionals 894 (97%) were among dental health care workers in non-hospital settings, including dentists (66, 7%), dental hygienists (61, 18%) and dental assistants (667, 75%). The majority of those reporting were females (638, 71%). Most (781, 87%) of the injuries involved syringes, dental instruments (77, 9%), and suture needles (23%). A large proportion (90%) of injuries occurred in offices and clinics of dentists, while remainder occurred in offices of clinics and of doctors of medicine (9%), and a few in specialty outpatient facilities (1%). Of the 894 dental health care workers with percutaneous injuries, there was evidence of HBV in 6 persons, HCV in 30 persons, HIV in 3 persons and both HBV and HVC (n = 2) exposure. CONCLUSION Out of hospital percutaneous injuries are a substantial risk to dental health professionals in Washington State. Improved work practices and safer devices are needed to address this risk.
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Affiliation(s)
- Syed M Shah
- Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Canada
- Canadian Centre for Health and safety in Agriculture, University of Saskatchewan, Saskatoon, Canada
- Safety & Health Assessment & Research for Prevention, (SHARP) Program, Washington State Department of Labor and Industries, Olympia, USA
| | - Anwar T Merchant
- Department of Community Health and Epidemiology, McMaster University, Hamilton, Canada
| | - James A Dosman
- Canadian Centre for Health and safety in Agriculture, University of Saskatchewan, Saskatoon, Canada
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Affiliation(s)
- Richard S. Callan
- Department of Oral Rehabilitation; Medical College of Georgia, School of Dentistry
| | - Frank Caughman
- Department of Oral Rehabilitation; Medical College of Georgia, School of Dentistry
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Smith WAJ, Al-Bayaty HF, Matthews RW. Percutaneous injuries of dental personnel at the University of the West Indies, School of Dentistry. Int Dent J 2006; 56:209-14. [PMID: 16972395 DOI: 10.1111/j.1875-595x.2006.tb00096.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
AIM To report the results of a survey of all percutaneous injuries occurring in 2003-2004 to staff and students at the dental school in Trinidad. METHOD Data were collected via 163 questionnaires administered to all dental surgery assistants, the current clinical students (years 3, 4 & 5), the interns, part-time and full-time academic staff. RESULTS A 71% response rate was obtained. The number of persons reporting one or more sharps injuries at the dental school was 42 (37%). Of these, 17 (40%) were percutaneous. Needlesticks and periodontal scaler injuries were the most common. There was no significant correlation (p>0.05) between injury and gender, age group, dominant hand or needle recapping technique. 75% of respondents described their concern of contracting a blood-borne disease from a sharps injury as "high" and 59% of the respondents followed the school's recommended protocol following the injury. 50% of the injuries among the students and interns were not reported. CONCLUSIONS A more rigorous programme of risk management with respect to sharps injuries needs to be designed and implemented at the school. There is also a need to improve surveillance of and reduce the underreporting of these injuries.
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Affiliation(s)
- William A J Smith
- The University of the West Indies Faculty of Medical Sciences, School of Dentistry, Champs Fleurs, Trinidad.
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Tuma S, Sepkowitz KA. Efficacy of safety-engineered device implementation in the prevention of percutaneous injuries: a review of published studies. Clin Infect Dis 2006; 42:1159-70. [PMID: 16575737 DOI: 10.1086/501456] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2005] [Accepted: 01/02/2006] [Indexed: 11/03/2022] Open
Abstract
Nearly 6 years have passed since the Needlestick Safety and Prevention Act of 2000 was signed into law. We reviewed studies published since 1995 that evaluated the effect of safety-engineered device implementation on rates of percutaneous injury (PI) among health care workers. Criteria for inclusion of studies in the review were as follows: the intervention used to reduce PIs was a needleless system or a device with engineered sharps-injury protection, the outcome measurements included a PI rate, the intervention was evaluated in a defined population with clear comparison groups in clinical settings, and outcomes and denominators used for rate calculations were objectively measured using consistent methodology. All 17 studies reported substantial decreases in device-associated or overall PI rates after device implementation (range of reduction, 22%-100%). The majority of studies (n=12) were uncontrolled before-after trials with limited ability to control for confounding variables. In addition, implementation of safety-engineered devices was often accompanied by other interventions, and direct measurement of outcomes was not performed. Nevertheless, safety-engineered devices are an important component in PI prevention.
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Affiliation(s)
- SeJean Tuma
- Infectious Disease Service, Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA
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Abstract
PURPOSE OF REVIEW For decades, healthcare workers have been known to be at risk from acquiring a variety of bloodborne pathogen infections as a result of occupational exposure. Primary prevention of exposures, as recommended by universal precautions guidelines, remains the cornerstone of protecting healthcare workers. Nonetheless, a substantial number of parenteral exposures continue to occur. Updated developments are summarized here, and recommendations for the protection of healthcare workers from bloodborne pathogens are provided. RECENT FINDINGS The predominant evidence suggests that total percutaneous injuries have decreased over the last decade. Thoughtful adherence to universal precautions remains the primary means of preventing occupational exposures and thus of reducing occupational risk of infection with bloodborne pathogens. A number of studies have provided additional evidence for the efficacy of safety devices in reducing specific subsets of injuries when combined with education and administrative interventions. Barriers to and positive predictors of universal precautions compliance have been identified. Postexposure prophylaxis remains the second line of defense; several authorities have now recommended three antiretroviral agents in this setting. SUMMARY In summary, almost two decades of experience with universal/standard precautions has resulted in a decrease in parenteral injuries, but much work remains to be done. Vaccines, effective infection control procedures, safer procedures, and safer devices will all be necessary, along with a better understanding of factors that influence healthcare worker behaviors that result in injury. In addition, a number of issues relating to the postexposure management of occupational exposures with bloodborne pathogens need to be better understood.
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Affiliation(s)
- Susan E Beekmann
- Department of Pathology, The University of Iowa College of Medicine, Iowa City, Iowa, USA.
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