Efficacy of Gyrus diego microdissector at varying oscillation speeds.
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.


CONCLUSIONS
These results suggest that microdissector efficacy increases with speed, up to 5000 rpm.
Sim
R J
RJ
Southmead Hospital, Bristol, UK. ricsim@otol.freeserve.co.uk
McDonald
S
S
Gillett
S
S
D006801:Humans; D008099:Liver; D042282:Microdissection / Q000295:instrumentation* / Q000379:methods; D008954:Models, Biological; D009298:Nasal Polyps / Q000601:surgery; D009666:Nose / Q000601:surgery*; D013517:Otorhinolaryngologic Surgical Procedures / Q000295:instrumentation / Q000379:methods