An ergonomics program designed to reduce the incidence of upper extremity work related musculoskeletal disorders

A New Zealand regional work-related sprains and strains surveillance, management and prevention programme: study protocol

BACKGROUND

The impact and costs associated with work-related sprains and strains in New Zealand and globally are substantial and a major occupational and public health burden. In New Zealand around one-third of all sprains and strains workers compensation (ACC) claims (2019) are for back injuries, but shoulder and arm injuries are increasing at a faster rate than other sprain and strain injuries (ACC, 2020). A need exists for a change to current approaches to sprains and strains prevention, to more effectively manage this significant and persistent problem in workplaces. Designing out hazards is one of the most effective means of preventing occupational injuries and illnesses. This paper outlines the study protocol of the surveillance, management and prevention programme and describes the utilisation of prevention through design principles in the prevention of work-related sprains and strains in agriculture/horticulture/food production in the Hawkes Bay region of New Zealand.

METHODS

This is a prospective mixed methods study incorporating the collection of quantitative data to describe the epidemiology of work related sprains and strains injuries presenting to the regional health centre (Hastings Health Centre) over a period of 24 months and qualitative data from participants presenting at the health centre to identify high risk industry sectors/ occupations/ workplaces and tasks and design, develop and apply prevention through design principles/ solutions/interventions to critical features of the work and work environment and undertake an outcome evaluation during the last 6 months of the project.

DISCUSSION

The purpose of this project is to establish an epidemiological surveillance programme to assess the incidence and prevalence of work-related sprains and strains according to age, sex, industry sector and occupation to target efforts to prevent work-related sprains and strains, by applying prevention through design (PtD) principles in selected workplaces in agriculture. The collection of more detailed case, occupational and work history data from a sample of patients presenting at the HHC clinic will identify high risk industry sectors/occupations/workplaces and tasks. Assessment techniques will include comprehensive design, design thinking and human factors/ergonomics methodologies through co-design and participatory ergonomics techniques. The PtD solutions/ interventions implemented will be evaluated using a quasi-experimental design consisting of a pre-test/ post-test with-in subjects design with control groups that do not receive the intervention.

Comparative analysis of preclinical dental students' working postures using dental loupes and dental operating microscope

BACKGROUND

Dentists are susceptible to musculoskeletal disorders due to prolonged static postures during dental treatments. Using a magnification tool like dental operating microscope (DOM) or the dental loupes may correct the operator's posture. Up until now, few studies have focused on preclinical dental students' posture when working with the DOM, while most of them have focused on the loupes. The aim of this study was to comparatively analyse the working posture of preclinical students during a dental restoration procedure, working with two different magnification methods.

MATERIALS AND METHODS

This study used a randomised cross-over design in which seventeen third year students were randomly divided into three groups. The exclusion criteria were previous contact with magnification systems and previous clinical working experience. Each student prepared 3 Black class 1 cavities on artificial lower molars: first with no magnification, following dental loupes and DOM. They were video-recorded throughout the preparation. Trunk, neck and upper-arm position were evaluated using the Posture Assessment Instrument. Students completed a questionnaire on their subjective perception of the two magnification systems.

RESULTS

The statistical analysis showed significant improvement of the working posture using magnification systems compared to direct vision. The biggest improvement was obtained through the use of DOM, followed by the dental loupes. Students perceived dental loupes as being the most comfortable and easy to adapt to. They reported being more focused when using DOM.

CONCLUSIONS

Both magnification systems had a positive impact on the working posture, DOM having the best results. Loupes showed better adaptability while DOM showed better concentration.

Effectiveness of Workplace Interventions in Return-to-Work for Musculoskeletal, Pain-Related and Mental Health Conditions: An Update of the Evidence and Messages for Practitioners

Purpose The objective of this systematic review was to synthesize evidence on the effectiveness of workplace-based return-to-work (RTW) interventions and work disability management (DM) interventions that assist workers with musculoskeletal (MSK) and pain-related conditions and mental health (MH) conditions with RTW. Methods We followed a systematic review process developed by the Institute for Work & Health and an adapted best evidence synthesis that ranked evidence as strong, moderate, limited, or insufficient. Results Seven electronic databases were searched from January 1990 until April 2015, yielding 8898 non-duplicate references. Evidence from 36 medium and high quality studies were synthesized on 12 different intervention categories across three broad domains: health-focused, service coordination, and work modification interventions. There was strong evidence that duration away from work from both MSK or pain-related conditions and MH conditions were significantly reduced by multi-domain interventions encompassing at least two of the three domains. There was moderate evidence that these multi-domain interventions had a positive impact on cost outcomes. There was strong evidence that cognitive behavioural therapy interventions that do not also include workplace modifications or service coordination components are not effective in helping workers with MH conditions in RTW. Evidence for the effectiveness of other single-domain interventions was mixed, with some studies reporting positive effects and others reporting no effects on lost time and work functioning. Conclusions While there is substantial research literature focused on RTW, there are only a small number of quality workplace-based RTW intervention studies that involve workers with MSK or pain-related conditions and MH conditions. We recommend implementing multi-domain interventions (i.e. with healthcare provision, service coordination, and work accommodation components) to help reduce lost time for MSK or pain-related conditions and MH conditions. Practitioners should also consider implementing these programs to help improve work functioning and reduce costs associated with work disability.

Ergonomic Evaluation: Part of a Treatment Protocol for Musculoskeletal Injuries

Ergonomic analyses and interventions are used as primary prevention methods to reduce physical stressors in the workplace and to prevent work-related musculoskeletal disorders (WMSDs). These methods can also be used for the treatment of injured employees. In this study, 103 employees with WMSDs resulting in more than 5 days away from usual work received an ergonomic evaluation which consisted of observation of usual work tasks, recommendations to minimize identified stressors, and case coordination. The goal of the intervention was to make simple job changes that would assist employees to return safely to usual job duties. The process for implementing this protocol for health care, airline, and university employees is described. The results show that after ergonomic evaluations were performed, the majority of recommendations were fully or partially (89%) implemented. Behavior changes were more likely to occur than administrative and equipment changes (p < .001). Occupational health nurses can use a similar program to enhance treatment plans for clients with WMSDs.

Prevalence of and risk factors for low back pain among dentists

[Purpose] The purpose of this study was to determine the prevalence, symptoms of, and risk factors for low back pain among dentists as well as to discover the possible correlation of these factors with working posture and how to reduce their prevalence. [Subjects and Methods] The study was conducted among 60 dentists (28 male and 32 female) with a mean age of 25.7 years. Dentists were evaluated with the self-administered Nordic musculoskeletal evaluation chart, postural discomfort chart, and a self-prepared questionnaire. [Results] The data showed a 70% incidence of back pain among dentists, with low back pain predominating in 47.6% of cases. Most of the subjects (90.5%) had a mild-to-moderate level of severity, and only 9.5% had a severe level of low back pain. The majority of the dentists (57%) treated 1-3 patients per day. Only a few dentists (17%) exercised during their rest period even though 57% of them reported taking a break during their working hours. Although 63% of the dentists were aware of the advantages of assistive tools, only 40% of them used any kind of assistive devices. [Conclusion] Dental professionals demonstrate a high prevalence of low back pain.

Occupational health and safety surveillance and research using workers' compensation data

OBJECTIVE

Examine uses of US workers' compensation (WC) data for occupational safety and health purposes.

METHODS

This article is a summary of the proceedings from an invitational workshop held in September 2009 to discuss the use of WC data for occupational safety and health prevention purposes.

RESULTS

Workers' compensation data systems, although limited in many ways, contain information such as medical treatments, their costs and outcomes, and disability causes that are unavailable from national occupational surveillance sources.

CONCLUSIONS

Despite their limitations, WC records are collected in a manner consistent with many occupational health and safety surveillance needs. Reports are available on the use of WC data for surveillance and research purposes such as estimating the frequency, magnitude, severity, and cost of compensated injuries. Inconsistencies in WC data can limit generalization of research results.

Ergonomics and occupational safety and health: an ILO perspective

The ILO has a mandate to protect workers against sickness, diseases and injuries due to workplace hazards and risks including ergonomic and work organization risk factors. One of the main functions for the ILO is to develop international standards related to labour and work. ILO standards have exerted considerable influence on the laws and regulations of member States. The ILO standards take the form of international Conventions and Recommendations. ILO Conventions and Recommendations relevant to protection of workers against ergonomic risk factors at the workplace include Convention No. 127 and Recommendation No.128 which specify the international requirements concerning the manual transport of a load. To help member States in applying the ILO standards, the ILO produces practical guides and training manuals on ergonomics at work and collects and analyses national practices and laws on ergonomics at the workplace. The ILO also conducts technical cooperation activities in many countries on ergonomics to support and strengthen the capacities of its tripartite constituents in dealing with workplace ergonomic and work organization risks. The ILO's technical cooperation activities give priorities on the promotion of voluntary, participatory and action-oriented actions to improve working conditions and work organizations of the small and medium sized enterprises. This paper reviews ILO's policies and activities on ergonomics in relation to occupational safety and health and prescribes ILO's considerations for its future work on ergonomics.

Systematic review of the role of occupational health and safety interventions in the prevention of upper extremity musculoskeletal symptoms, signs, disorders, injuries, claims and lost time

BACKGROUND

Little is known about the most effective occupational health and safety (OHS) interventions to reduce upper extremity musculoskeletal disorders (MSDs) and injuries.

METHODS

A systematic review used a best evidence synthesis approach to address the question: "do occupational health and safety interventions have an effect on upper extremity musculoskeletal symptoms, signs, disorders, injuries, claims and lost time?"

RESULTS

The search identified 36 studies of sufficient methodological quality to be included in data extraction and evidence synthesis. Overall, a mixed level of evidence was found for OHS interventions. Levels of evidence for interventions associated with positive effects were: Moderate evidence for arm supports; and Limited evidence for ergonomics training plus workstation adjustments, new chair and rest breaks. Levels of evidence for interventions associated with "no effect" were: Strong evidence for workstation adjustment alone; Moderate evidence for biofeedback training and job stress management training; and Limited evidence for cognitive behavioral training. No interventions were associated with "negative effects".

CONCLUSION

It is difficult to make strong evidenced-based recommendations about what practitioners should do to prevent or manage upper extremity MSDs. There is a paucity of high quality OHS interventions evaluating upper extremity MSDs and none focused on traumatic injury outcomes or workplace mandated pre-placement screening exams. We recommend that worksites not engage in OHS activities that include only workstation adjustments. However, when combined with ergonomics training, there is limited evidence that workstation adjustments are beneficial. A practice to consider is using arm supports to reduce upper extremity MSDs.

A literature review describing the role of return-to-work coordinators in trial programs and interventions designed to prevent workplace disability

OBJECTIVE

Return-to-work (RTW) coordination has been suggested as an effective strategy for preventing workplace disability, but the scope of these services is not well described. The objective of this study was to describe the activities of RTW coordinators in published trials to provide a basis for establishing necessary competencies.

METHODS

A keyword search of MEDLINE and CINAHL databases was conducted to identify intervention studies with a RTW coordinator providing direct, on-site workplace liaison to reduce work absences associated with physical health ailments. This search yielded 2,383 titles that were inspected by two examiners. Using a stepwise process that allowed for assessment of inter-observer agreement, 90 full articles were selected and reviewed, and 40 articles (22 studies) met criteria for inclusion.

RESULTS

All but two studies (of traumatic brain injury) focused on musculoskeletal conditions or work injuries. Twenty-nine RTW coordinator activities were identified, but there was variation in the training background, workplace activities, and contextual setting of RTW coordinators. Based on reported RTW coordinator activities, six preliminary competency domains were identified: (1) ergonomic and workplace assessment; (2) clinical interviewing; (3) social problem solving; (4) workplace mediation; (5) knowledge of business and legal aspects; and (6) knowledge of medical conditions.

DISCUSSION

Principal activities of RTW coordination involve workplace assessment, planning for transitional duty, and facilitating communication and agreement among stakeholders. Successful RTW coordination may depend more on competencies in ergonomic job accommodation, communication, and conflict resolution than on medical training.

Evaluation of two preventive interventions for reducing musculoskeletal complaints in operators of video display terminals

BACKGROUND AND PURPOSE

The purpose of this study was to evaluate the efficacy of a preventive ergonomic intervention, which was provided by physical therapists, on spinal and upper-extremity work-related posture and symptom complaints of workers who use video display terminals (VDT).

SUBJECTS

Two hundred employees who spent at least 20 hours per week at a VDT were randomly divided into 2 groups. Group E received the ergonomic intervention and an informative brochure, and group I received only the brochure.

METHODS

Both groups were evaluated at the beginning of the study and at a follow-up 5 months later. The following tools were used: a pain drawing and the Rapid Entire Body Assessment (REBA) method to assess spinal and upper-extremity work-related posture.

RESULTS

Group E had a lower REBA score and reduced lower back, neck, and shoulder symptoms compared with group I.

DISCUSSION AND CONCLUSION

The results suggest that a personalized preventive ergonomic intervention can improve spinal and upper-extremity work-related posture and musculoskeletal symptoms for workers who use VDTs.

Workplace-based return-to-work interventions: a systematic review of the quantitative literature

INTRODUCTION

A systematic review was conducted to review the effectiveness of workplace-based return-to-work (RTW) interventions.

METHOD

Seven databases were searched, in English and French, between January 1990 and December 2003 for peer-reviewed studies of RTW interventions provided at the workplace to workers with work disability associated with musculoskeletal or other pain-related conditions. Methodological quality appraisal and data extraction were conducted by pairs of reviewers.

RESULTS

Of a total of 4124 papers identified by the search, 10 studies were of sufficient quality to be included in the review. There was strong evidence that work disability duration is significantly reduced by work accommodation offers and contact between healthcare provider and workplace; and moderate evidence that it is reduced by interventions which include early contact with worker by workplace, ergonomic work site visits, and presence of a RTW coordinator. For these five intervention components, there was moderate evidence that they reduce costs associated with work disability duration. Evidence for sustainability of these effects was insufficient or limited. Evidence regarding the impact of supernumerary replacements was insufficient. Evidence levels regarding the impact of the intervention components on quality-of-life was insufficient or mixed.

CONCLUSIONS

Our systematic review provides the evidence base supporting that workplace-based RTW interventions can reduce work disability duration and associated costs, however the evidence regarding their impact on quality-of-life outcomes was much weaker.

How we prevent prevention of musculoskeletal disorders in the workplace

American businesses face huge costs for work-related musculoskeletal pain. Work-related musculoskeletal pain is not new or unique to the population of the United States. Many historic manifestations of workplace pain have been related to innovation and technology changes. Incidence rates and severity of symptoms have had an interesting relationship to the public concern and governmental decisions. In 1999, a National Academy of Sciences study found total costs to be more than US dollar 1 trillion per year and concluded that effective prevention of workplace pain through active intervention is not only possible, but results in a significant cost savings for the employer while reducing the disability experienced by the employee. Employers have been reluctant to embrace the benefits of workplace prevention for work-related musculoskeletal pain. The purpose of this review is to examine (1). what is know about prevention of work-related musculoskeletal pain and workplace musculoskeletal disorders, (2). a brief description of several prevention preventing behaviors, (3). an analysis of how these preventing behaviors are maintained, and (4). suggestions on how to reverse these prevention preventing behaviors.

Participatory ergonomics as a return-to-work intervention: a future challenge?

BACKGROUND

Participatory ergonomics (PE) are often applied for prevention of low back pain (LBP). In this pilot-study, a PE-program is applied to the disability management of workers sick listed due to LBP.

METHODS

The process, implementation, satisfaction, and barriers for implementation concerning the PE-program were analyzed quantitatively and qualitatively for 35 workers sick listed 2-6 weeks due to LBP and their ergonomists.

RESULTS

Two-hundred-and-seventy ergonomic solutions were proposed to the employer. They were targeted more at work design and organization of work (58.9%) than at workplace and equipment design (38.9%). They were planned mostly on a short-term basis (74.8%). Almost half (48.9%) of the solutions for work adjustment were completely or partially implemented within 3 months after the first day of absenteeism. Most workers were satisfied about the PE-program (median score 7.8 on a 10-point scale) and reported a stimulating effect on return-to-work (66.7%). Main obstacles to implementation were technical or organizational difficulties (50.0%) and physical disabilities of the worker (44.8%).

CONCLUSIONS

This study suggests that compliance, acceptance, and satisfaction related to the PE-program were good for all participants. Almost half of the proposed solutions were implemented.

Workplace prevention and musculoskeletal injuries in nurses

OBJECTIVE

The purpose of this study was to describe the availability of preventive devices and training in relation to neck, shoulder, and back musculoskeletal injuries/disorders (MSD) in registered nurses.

SUMMARY BACKGROUND DATA

Nurses have one of the highest rates of MSD of any occupation. Studies have shown that mechanical lifting devices and lifting teams can reduce MSD rates and associated costs.

METHODS

Data from 1163 randomly selected currently working nurses (1+ years on the current job) were collected in anonymous mailed surveys (74% response rate). MSD cases had neck, shoulder, and/or back symptoms for at least 1 week, or at least monthly, and moderate or more pain, in the past year.

RESULTS

Nurses with mechanical lifting devices available were significantly less likely to have neck or back MSDs. Back injury was less likely when lifting teams were available. However, adjustable beds and transfer sheets were associated with greater odds of back MSD. Training in workstation adjustment was associated with significantly lower MSD prevalence, though postural training was not.

CONCLUSIONS

Though use of mechanical devices and lifting teams was limited in nursing workplaces, these prevention strategies were related to reduced odds of MSD. Nursing administrators can use these findings to consider workplace changes.

Impact of case manager training on worksite accommodations in workers' compensation claimants with upper extremity disorders

Management of the return-to-work process in claimants with work-related upper extremity disorders often poses challenges to the health care provider, claimant, and employer. Modifying workplace ergonomic risk factors as a component of the workplace accommodation process may improve return-to-work outcomes by reducing recurrent pain and discomfort. The present study is a case-control evaluation of the effects of a 2-day training program for nurse case managers that was designed to facilitate the implementation of workplace accommodations within a workers' compensation health care delivery system. After the training, 101 claimants with compensable upper extremity disorders were randomly assigned to case managers with and without training. Overall, 208 accommodations were recommended and 155 of these were implemented (75%). Claimants of trained nurses received 1.5 times as many recommendations for accommodations as claimants managed by nurses not trained in the process, and 1.4 times as many accommodations were implemented, although no differences were found between the two groups in implementation rates. Trained nurses were more likely to recommend accommodations addressing workstation layout, computer-related improvements, furnishings, accessories, and lifting/carrying aids, whereas the untrained nurses were more likely to suggest light duty and lifting restrictions. This study indicates that the training was associated with a change in the practice behavior of case managers regarding the workplace accommodation process. More research is needed to identify barriers to implementation and develop more effective approaches to facilitate worksite accommodations in disabled workers with carpal tunnel syndrome and other persistent upper extremity disorders.

Organizing the approach to musculoskeletal misuse syndrome

Musculoskeletal misuse syndromes are secondary to misuse of specific tendons, ligaments, or other soft tissues. Despite patient education interventions to prevent acute musculoskeletal injury, these injuries still occur. A well-organized approach to musculoskeletal complaints can reduce the risk of missed diagnoses and ensure appropriate care. This article reviews history and physical examination findings indicative of a misuse etiology and provides clinicians with a discussion of available diagnostic tests and therapies.

Health care workers

More people are employed in the health care sector than in any other industry in the United States. Health care workers are exposed to a wide variety of hazards, including biological, chemical, physical and psychological stressors. Concerns about exposure to contagious diseases such as HIV, Hepatitis B and C, and tuberculosis have influenced the career choices of many health professionals. Physical hazards, especially ergonomic ones, account for the majority of the disability faced by health care workers. Chemical exposure and psychosocial stresses are also present in health care institutions. The exposure encountered in health care facilities is potentially dangerous to health care workers as well as to their family members and unborn children.