Repetition strain injury: the Australian experience--1992 update

Os Sintomas de LER/DORT: um Estudo Comparativo entre Bancários com e sem Diagnóstico

Resumo As Lesões por Esforço Repetitivo/Distúrbios Osteomusculares Relacionados ao Trabalho (LER/DORT) são uma síndrome cujo diagnóstico é complexo. O objetivo deste artigo foi comparar os sintomas osteomusculares entre os bancários que afirmaram já terem sido diagnosticados por LER/DORT com aqueles que afirmaram nunca terem sido diagnosticados por algum médico, analisando as diferenças com relação aos fatores sociodemográficos. Participaram da pesquisa 220 bancários do estado da Bahia, dos quais, 91 apresentaram apenas sintomas osteomusculares e outros 91, além dos sintomas, também relataram o diagnóstico de LER/DORT. Apenas 38 não relataram qualquer distúrbio osteomuscular. Os que possuem diagnóstico de LER/DORT são os que mais sentem sintomas osteomusculares. Com maior média de idade, menor escolaridade e maior predominância do sexo feminino, os diagnosticados apresentaram sintomas de DORT há mais tempo, mais severos e com maior frequência. Este artigo contribui para a descrição da sintomatologia do fenômeno LER/DORT.

Hand pain other than carpal tunnel syndrome (CTS): the role of occupational factors

Some occupational factors have been implicated in the development of disorders manifested as hand pain. The associations seem to be well documented in processes such as hand-arm vibration syndrome (HAVS) or writer's cramp. There are contradictory data in the literature about the relationships of trigger finger, De Quervain's tenosynovitis (DQT) and tenosynovitis of the wrist with occupational factors. In this article, we review current knowledge about clinical manifestations, case definition, implicated occupational factors, diagnosis and treatment of the most relevant hand pain disorders that have been associated with occupational factors, excluding carpal tunnel syndrome (CTS).

Stigmatization of repetitive hand use in newspaper reports of hand illness

Failure to provide a balanced evidence-based consideration of the role of activity in illness can stigmatize individuals and their activities. We assessed the prevalence of language that stigmatized repetitive hand use and those that use their hand repetitively in newspaper coverage of common hand illnesses. The LexisNexis Academic database was used to search five major US newspapers for articles containing keywords about common hand illnesses during a 3-year period. Article language was assessed for stigmatization of activities involving repetitive hand use as well as for stigmatization of patients who use their hand repetitively. One hundred and twenty-four articles on hand illnesses were identified. Of these, 65.3% of articles stigmatized activities involving repetitive hand use, including 96.6% of articles discussing overuse injury of the hand, 90% of articles discussing tendonitis or tenosynovitis, and 51.8% of articles discussing carpal tunnel syndrome. Patient stigmatization was documented in 30.6% of the newspaper articles. Stigmatizing statements were most commonly made by journalists (94.8%), followed by patients (3.1%), and physicians (2.1%). Language that stigmatizes repetitive hand use and patients who use their hand repetitively is prevalent among US newspaper articles. Both health professionals and journalists reporting health-related news should be more sensitive to the use of stigmatizing language and provide a more balanced, measured, and evidenced-based account of hand illnesses.

Arm pain without physical findings: medicine vs. the law?

Arm pain without physical findings occurring in association with light repetitive work has been with us from the time man developed factories but has become controversial since a number of reported cases in Australia in 1983. It remains a highly contentious and medically confused area. Claims for compensation for the condition against employers have been firmly rejected by courts in Australia and the USA, but large awards continue to be made in UK courts. The reason for this difference lies in recent changes in British Law and court procedure and British courts now seem to recognize this nebulous clinical condition as representing a compensable injury. In this situation, therefore, physicians must be meticulous in their examinations and record keeping. In addition, they must only use specific diagnoses when irrefutable clinical signs or confirmatory special investigation results are present and must be guarded in loose talk or discussion about "causation".

Repetitive stress injury: diagnosis or self-fulfilling prophecy?

* The vague definitions of so-called repetitive stress injuries are indicative of the fact that scientific studies have failed to show that repetitive motion causes injury. * Given the uncertainty about causation, work-related musculoskeletal disorders (WRMSDs) is a more readily accepted term to describe these phenomena. * There is little doubt that most ergonomic interventions increase comfort in the work environment, which is of great benefit to the worker. Many proponents of ergonomics assert that the elimination of certain risk factors related to force, repetition, and posture can prevent or even cure work-related musculoskeletal disorders of the upper extremity. However, there is little scientific support for this position. * Undue reliance on ergonomics to treat musculoskeletal disorders, to the exclusion of proper diagnosis and attention to medical and health risk factors, can have adverse consequences for the patient. * Science rather than politics and public policy should determine what causes injury and disease. * The failure of numerous plaintiffs in litigation regarding repetitive stress injury due to use of computer keyboards is important because, when judges and lay jurors were presented with both sides of the issue, they rejected these claims in a forum (the judicial system) that traditionally compensates individuals bringing so-called mass-tort cases.

Neuromuscular and psychological characteristics in subjects with work-related forearm pain

There are scant data available on the neuromuscular and psychological characteristics of patients with cumulative trauma disorders. We compared 16 subjects with work-related forearm and hand pain in the dominant upper limb with 9 age-matched control subjects. Pain subjects were divided into two groups based on nerve conduction studies: eight subjects were in the study group for median neuropathy at the wrist (MN, median transcarpal latency >2.3 ms), and eight were in the study group for electrodiagnostically negative pain (EN). Average pain, forearm muscle tenderness, grip strength, pinch strength, and wrist flexor and extensor strength were measured. The Health Status Questionnaire and the Beck Depression Inventory were used to measure health perception and depressive symptoms, respectively. Work satisfaction was determined by a newly devised scale. Statistical analysis was by analysis of variance and planned comparison analysis. The MN and EN groups did not significantly differ on any of the measures except median transcarpal latency. Both pain groups had significantly (P < 0.05) greater average pain, greater extensor muscle tenderness, higher Beck Depression Inventory scores, higher pain rating, and poorer physical functioning on the Health Status Questionnaire than did the normal control group. Grip strength and wrist extension force were diminished in both cumulative trauma groups compared with control subjects; however, only grip strength in the MN group and wrist extension force in the EN group differed significantly (P < 0.05) from control subjects. Only the EN group had significantly less work satisfaction than did the control group. Overall, both pain groups differed from control subjects and shared similar characteristics, with the exception of median neuropathy.

Psychometric assessment of patients with chronic upper extremity pain attributed to workplace exposure

Upper extremity pain attributed to workplace exposure is a growing concern in medicine today. This study was undertaken to investigate the psychological findings in patients with chronic upper extremity pain attributed to workplace exposure. Sixty-three consecutive patients were evaluated. All patients underwent a history and physical examination by a hand surgeon and a psychological evaluation by a licensed psychologist, including a Minnesota Multiphasic Personality Inventory-2 (MMPI-2). Physical and psychological findings were then compared. Forty-one patients (65%) showed abnormalities on MMPI-2 examination (t score > 70 = 97% confidence). This result is far above what generally would be expected in medical patients. When physical findings were grouped with psychological findings, 5 distinct groups were identified: 1 patient had normal physical and psychological results, 6 patients had normal physical findings but abnormal psychological assessments, 21 patients had abnormal physical findings but normal psychological assessments, 28 patients had both abnormal physical and psychological findings, and 7 patients had abnormal physical results but invalid MMPI-2 evaluations due to purposeful attempts to deny psychological symptoms. Identification of these groups may have diagnostic, prognostic, and treatment value. In addition, identification of these groups may help clarify several aspects of the debate over the role of psychosocial factors in the development and maintenance of chronic upper extremity pain that patients attribute to workplace exposure.

Free innervated latissimus dorsi muscle flap for reconstruction of full-thickness abdominal wall defects

Full-thickness abdominal wall defects continue to be a challenge for the reconstructive surgeon. The most frequently used reconstructive techniques are transfer of a pedicled, local abdominal flap or a distant flap from the thigh region. The purpose of this paper is to present a new approach to full-thickness abdominal wall reconstruction using an innervated free latissimus dorsi musculocutaneous flap. Four patients with large full-thickness abdominal wall defects underwent reconstruction with a free innervated latissimus dorsi muscle flap. In two patients, staged abdominal wall reconstruction was performed. Primary closure was first obtained with a skin graft. During the subsequent definitive reconstruction (with an innervated free latissimus dorsi muscle flap), this skin graft was not excised. Instead, deep dermabrasion of the skin graft was performed, leaving a residual dermal layer. This layer was then covered with a free innervated latissimus dorsi muscle flap. In these two cases, there was no need for the use of a prosthetic mesh. A single stage reconstruction was performed in the other two cases. After abdominal wall sarcoma resection, Prolene mesh was placed and subsequently covered with a free innervated latissimus dorsi muscle flap. There were no free flap failures. The average time of surgery was 4 hours, 50 minutes. The average hospital stay was 14 days. No significant complications occurred except for one donor site seroma. No hernias have occurred postoperatively. The mean follow-up was 21 months. Postoperatively, electromyographic testing was performed regularly in all patients to document reinnervation of the latissimus dorsi muscle flap. With reinnervation and intensive muscle training, the transplanted latissimus dorsi muscle offers enough contractile capacity and strength to adequately replace the function of the missing abdominal wall muscles. In complicated staged reconstructions, dermabrasion of the temporary skin graft allows for the use of a residual dermal layer as a fascia-like substitute to aid in the restoration of structural integrity. The combination of the dermal layer with an innervated free latissimus dorsi muscle provides a strong, vascularized fascial repair as well as an overlying vascularized soft-tissue coverage. In conclusion, adequate functional dynamic reconstruction of full-thickness abdominal wall defects is possible using an innervated free latissimus dorsi muscle flap. The reinnervated latissimus dorsi muscle is suitable for reconstitution of the missing functional and anatomic components of complex abdominal wall defects.

The effect of workers' or third-party compensation on return to work after hand surgery

OBJECTIVES

To investigate the role of compensation in recovery from scaphoid internal fixation.

DESIGN

Retrospective review of patients who had had scaphoid internal fixations performed by one surgeon between 1 September 1981 and 31 December 1994 with a minimum follow-up of six months.

SETTING

Private practice of a specialist hand surgeon.

PATIENTS

202 patients who attended for the minimum of six months' follow-up, and for whom accurate details of return-to-work time were available.

INTERVENTION

Internal fixation of scaphoid fractures using the Herbert bone screw without postoperative immobilisation.

MAIN OUTCOME MEASURES

Return-to-work time and compensation status.

RESULTS

Overall, patients receiving compensation took more than twice as long as privately insured individuals to return to work after scaphoid internal fixation (7.3 v. 3.3 weeks). There was no difference for clerical workers, but for manual workers compensable individuals took significantly longer (P < 0.001) to return to work. Compensation status did not affect bony union, postoperative wrist function, pain or patient satisfaction.

CONCLUSIONS

Compensation encourages a slower return to work after surgery. The current compensation system could save millions of dollars each year by incorporating incentives to return to work without sacrificing good surgical results.