Ergonomics and Liquid Handling
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As a laboratory technician, pipetting is a routine
laboratory technique that is performed everyday, for a good portion
of the day. Pipetting work demands concentration, accuracy and precision.
Due to the nature of the tests being conducted, only short breaks
can be taken due to time restraints to achieve optimal test results
(Friedriksson 1995).
Cumulative trauma disorders have become a concern of laboratory technicians
since the 1960s when plunger operated mechanical pipettors were first introduced.
The switch from bulb operated glass pipettes to mechanical pipettes introduced
a repetitive movement that was not used for liquid handling in the past.
With the increased numbers of experiments that are required in a normal
laboratory setting today, the reports of cumulative trauma disorders have
also been increasing.
According to a study conducted in Sweden, technicians who were performing
pipetting techniques for more than 300 hours a year had a higher prevalence
of hand ailments (Bjrkstn, 1994). This equates to a daily routine of 12
hours a day of pipetting tasks. The features of the pipette, such as the
design of the plunger, weight and length of the pipette, force needed to
operate the pipette, and how the pipette fits into the hand, (Yltupa 1997)
may also increase the risk of cumulative trauma disorder.
With the increased focus on reducing any types of repetitive stress injuries,
many pipette manufacturers and health organizations have looked at this
field and analyzed causes and possibly preven
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