PubMed · 13996521
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P C VEDAST, J H JACOBS. 1963. Screening an electromyography room.. https://doi.org/10.1093/rheumatology%2F7.2.65
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BACKGROUND: Postpolio syndrome is characterised by new muscular weakness, pain, and fatigue several decades after the acute polio, and affects approximately 1/4 of patients with previous paralytic polio. MATERIAL AND METHODS: A 47-year-old woman with a previous history of acute poliomyelitis developed progressive muscular weakness in her left arm and right leg with muscular pain and fatigue. Clinical examination, MRI, and electromyography gave no other explanation to her progressive muscular weakness and fatigue than postpolio syndrome. She was treated with 400 mg/kg immunoglobulin intravenously for five consecutive days. RESULTS: At follow-up two and three months later, she had a considerable increase in isokinetic muscle strength in knee extension and flexion on the right side, and experienced less fatigue. INTERPRETATION: This case suggests that stabilisation of an autoimmune dysfunction may be a therapeutic option in postpolio syndrome.
BACKGROUND: The ergonomic deficiencies of various minimally invasive surgery (MIS) instrument handles are well-known. In the past, many studies have been performed to gain a better understanding of ergonomics in MIS. The current study investigates muscle strain during various dynamic tasks with different instrument handles. METHODS: Five different handle designs were tested: the axial handle (Aesculap), the vario handle (own model), multifunctional and ring handles (both Karl Storz), and the shank handle (Wilo). Ten subjects without any surgical training tested the following instrument functions: precise dynamic movement, rotation of the closed instrument, and simultaneous opening and closing of the effector. During these three trials, task performance (errors/duration) and the electromyographic activity of the hand and lower arm muscles were measured. RESULTS: Regarding the errors and the time required to carry out the tasks, the five handles showed similar results. The muscle activity was lowest for the precise dynamic movement task and highest during the rotation task. The axial handle required significantly more muscle activity than all other handles. CONCLUSION: On the basis of these data, it was possible to construct characteristic muscle activation patterns for each handle. However, these patterns were not task specific. Accordingly, they may form a basis to improve the ergonomics of MIS handles with regard to muscle strain.
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