Neck Positioner for Fluoroscopy Examination

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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
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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

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Motivation

• Neck extender/flexor for unconscious patient
• Used during fluoroscopic examination
• Must not interfere with imaging
• Minimize radiation exposure to hospital staff

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Fluoroscopic Cervical Spine Imaging

• Several x-ray slides in motion
• Cervical spine injury diagnostics
• Linear actuator design

Fluoroscopy Machine in UW-Hospital
extension
flexion
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e09/text.html
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Mechanical Requirements

• Extend/flex the neck 45 from neutral
• Rotation rate less than 2/sec
• Stabilize patients head during motion
• No interference with lateral imaging

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Design I Vertical Actuator

• Modified version of last semesters design
• Pin connections made to actuator

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Design II Gear and Motor

• Bidirectional motor drives headboard rotation
• Gear ratio controls neck rotation rate

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Design III Sideways Actuator

• Actuator under table saves space
• Pin connections provide stability

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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
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Building the Gear and Motor Design

• Refine design dimensions
• Research materials and manufacturers
• Construct prototype

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Acknowledgements

• Prof. Block
• Dr. Haughton
• Dr. Medow