Proprioception Testing Device

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Proprioception Testing Device
Project Design Review

• Thomas A. Farley, EGR
• Lee C. Groeneweg, EGR
• Steve Brodnicki, SPT
• Ryane Eno, SPT
• Mike Terrell, SPT

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Definition of Proprioception

• Joint position sense without visual input
• Measurements help inform physical therapist of
  patients ability to determine limb location in
  space
• Also helpful in determining whether therapy
  interventions are necessary

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Measurement of Proprioception

• Blind fold individual
• Place the limb into a test position
• Hold in test position for a few seconds
• Record angle of test position
• Return to starting position
• Patient places limb into the testing position
• Record angle of repeated attempt

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Project Definition

• Device to isolate and measure internal and
  external rotation of shoulder joint

Internal Shoulder Rotation
External Shoulder Rotation
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Statement of Need

• Device to isolate and measure internal and
  external rotation of shoulder joint
• Must measure degrees similar to physical
  therapists goniometer
• Test position must be self restraining (Locking)

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Design Constraints

• Patient positioned lying on back
• Shoulder blade must be immobilized
• Upper arm positioned 90 to body
• restrained
• allowing longitudinal motion
• in a resting position
• Elbow must be positioned 90 to upper arm

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Project Specifications

• Isolation and measurement of shoulder internal
  and external rotation
• Position of body - lying down on table
• No computer technology
• Easily used in a clinical setting
• Portable and light
• Measurement in degrees
• Inexpensive
• Test position must be self restraining (Locking)

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Conceptual Designs (1 of 3)

• Cross-table plate design

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Conceptual Designs (2 of 3)

• Cart supported device

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Conceptual Designs (3 of 3)

• Tripod supported device

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Decision Matrix
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Design of Choice

• Sketch of chosen design
• Defense of chosen design
• Highest portability
• Easiest to manufacture
• Easy to operate

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Key Component Sketches

• Plate
• Pivot Bracket
• Armature

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Key Component Sketches (continued)

• Laser pen holder (top)
• Laser Pen Holder (bottom)

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Key Component Sketches (continued)

• Tripod
• Keychain Laser Pointer

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Process Plan - Preliminary

• Plate
• Cut to size on saw,
• Holes drilled using drill press
• Armature
• Cut to size on saw
• Hole drilled using drill press
• Pivot Bracket
• Cut to size on saw
• Drill holes
• 90 bend form

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Process Plan - Preliminary (cont.)

• Laser pen holder (top)
• formed on MaxNC mill
• Laser pen holder (bottom)
• formed on MaxNC mill
• Tripod
• purchased part
• Tension adjustment knob
• purchased part
• Key chain Laser pens (2)
• purchased parts

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Proprioception Testing Device
Project Design Review