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Efficacy of Gyrus diego microdissector at varying oscillation speeds
R J Sim1, S McDonald, S Gillett
1Southmead Hospital, Bristol, UK. ricsim@otol.freeserve.co.uk
Objective:
To determine the efficacy of the Gyrus diego microdissector at increasing oscillation speeds, using an in vitro tissue model.
Background:
It had not previously been established whether microdissectors were more efficient at higher or lower speeds.
Methods:
We investigated the effect of varying microdissector oscillation speeds on the weight of material aspirated in a given time. A 4 mm straight blade was used with constant suction strength. Jelly and liver were used to simulate polyps and muscle plus connective tissue, respectively. Water was used as a control. Repeat readings were taken at speeds of 1000, 2000, 3000, 4000 and 5000 rpm. Data were analysed using linear bivariate regression.
Results:
The results showed significant linear trends in the cases of liver and jelly, with faster cutter speeds being associated with higher aspiration rates.
Conclusion:
These results suggest that microdissector efficacy increases with speed, up to 5000 rpm.
