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Risks of Pipetting to Laboratory Workers
Ergonomics of pipetting is important and relates to development of WRULD (Work Related Upper Limb Disorders, CTD (Cumulative Trauma Disorder) or RSI (Repetitive Strain Injury). These include a whole spectrum of diseases, from tendonitis of the hand or wrist to carpal tunnel syndrome. If hands or wrists hurt or go numb or tingle, if your joints ache after repetitive tasks, such as pipetting, it is almost certainly a WRULD. Other symptoms include losing strength or coordination in your hands, perhaps even dropping objects. Not everyone experiences all symptoms, and sometimes your symptoms may not occur until several hours or even days after the activity which causes them. This problem can be caused by a number of elements: Design of the pipette, number of repetitions, seating position, lack of rest intervals or poor bench layout. It can be also accompanied by other ailments such as backaches or headaches. Although this problem is not clearly covered in legislation, cases frequently come to light, employers naturally become very concerned and directives will no doubt follow in due course. Secondly the action of pipetting can form aerosols. Obvious precautions need taking to avoid inhalation or even skin contact. All laboratories should have sound safety practices and these are governed by established bodies world-wide. Protective coats, gloves, laminar airflow cabinets etc. all assist in this prevention.