Transcript Neck Positioner for Fluoroscopy Examination

Neck Positioner for
Fluoroscopy Examination
Clients: Victor Haughton, M.D.
Josh Medow, M.D.
Advisor: Wally Block, Ph.D.
Team Members:
Alison Boumeester
Peter Strohm
Kaitlin Brendel
Allie Finney
Megan Britson
Overview
Motivation
 Cervical spine imaging

◦ fluoroscopy and previous work

Requirements
◦ mechanics, materials, and safety

Proposed designs – actuators vs. gears
◦ pro/con, design matrix

Building the design
Motivation
Neck extender/flexor for unconscious
patient
 Used during fluoroscopic examination
 Must not interfere with imaging
 Minimize radiation exposure to hospital
staff

Fluoroscopic Cervical Spine
Imaging
• Several x-ray slides in motion
• Cervical spine injury diagnostics
• Linear actuator design
Fluoroscopy Machine in UW-Hospital
extension
flexion
http://www.rad.washington.edu/quickcases/cases/Case09/text.html
Mechanical Requirements
Extend/flex the neck ± 45˚ from neutral
 Rotation rate less than 2˚/sec
 Stabilize patient’s head during motion
 No interference with lateral imaging

Design I – Vertical Actuator
Modified version of last semester’s design
 Pin connections made to actuator

Design II – Gear and Motor
Bidirectional motor drives headboard rotation
 Gear ratio controls neck rotation rate

Design III – Sideways Actuator
Actuator under table saves space
 Pin connections provide stability

Design Matrix
Criteria
Vertical
Actuator
Gear and
Motor
Sideways
Actuator
Safety
(30)
25
23
25
Feasibility
(20)
17
14
19
Expense
(10)
8
7
8
Aesthetics
(10)
5
10
7
Mechanics
(30)
20
29
21
TOTALS
75
83
80
Building the Gear and Motor Design

Refine design dimensions

Research materials and manufacturers

Construct prototype
Franklin Institute (2007)
US Plastic Corp (2007)
Acknowledgements
Prof. Block
 Dr. Haughton
 Dr. Medow
