Controller size matters: User proficiency is affected by endoscopic controller size


Endoscope controllers are traditionally a one-size-fits-all design. However, this
design may not fit the modern workforce in endoscopy-related fields. Our study aims
to determine if endoscopic controller size, independent of user dexterity, affects
user proficiency.


54 endoscopically naive participants completed a baseline dexterity test, followed
by large-controller endoscopic and small-controller bronchoscopic simulation exercises.
Participants were stratified by surgical glove size (≥7.5 and < 7.5) and gender.


Endoscopy time was longer in participants with <7.5 size gloves (p = 0.01) and in
females (p < 0.001). However, participants with glove size <7.5 had better dexterity
measures (p = 0.04). There was no difference in bronchoscopy time based on glove size
(p = 0.61).


Participants with larger hands were more proficient with the larger controller despite
being less dexterous than their counterparts. This advantage was less pronounced with
the smaller controller. Our findings suggest that endoscopic controllers should be
modified in design to accommodate all providers.

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