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Abstract: Joint
replacement surgery, particularly of the knee is a commonly performed procedure in the
U.S. The sagittal bone saws used during orthopedic surgery utilize a form factor derived
from a drill that has remained largely unchanged since inception. Observation reveals
that surgeons frequently adopt awkward, extreme or compensatory postures while using the
saw. With the goal of reducing ... read moreoperator strain, localized pressures and deviated wrist
postures as well as improving control and subjective satisfaction, alternative form
factors were developed and prototyped on a 3D printer. To compare models, test fixtures
simulate the cutting guides used during knee replacements. Subjects are instrumented
with motion tracking sensors to capture wrist posture while completing simulated sawing
tasks and complete subjective usability questionnaires for each prototype. Quantitative
data for wrist deviation and accurate task performance as well as a range of subjective
and anthropometric data was collected and analyzed to determine if form factor or hand
size had a significant impact on wrist posture, accuracy or subjective ratings. Results
showed statistically significant differences in subjective usability ratings but form
factor did not have a significant effect on wrist posture or accuracy. The results of
this study add to the body of literature on surgical ergonomics and tool design and may
help to improve usability of surgical
instruments.
Thesis (M.S.)--Tufts University,
2015.
Submitted to the Dept. of Mechanical
Engineering.
Advisor: Thomas
James.
Committee: Dan Hannon, Eric Smith, and Anil
Saigal.
Keywords: Design, Biomechanics, and
Occupational safety.read less
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