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Patient Positioning Aid. E. Vargas, M. Britan, E. Kordieh Department of Biomedical Engineering Stony Brook University. Outline. Background / Design Criteria Engineering Analysis Design Solution Answer question: why? Acknowledgements. Background.

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patient positioning aid

Patient Positioning Aid

E. Vargas, M. Britan, E. Kordieh

Department of Biomedical Engineering

Stony Brook University

outline
Outline
  • Background / Design Criteria
  • Engineering Analysis
  • Design Solution
  • Answer question: why?
  • Acknowledgements
background
Background
  • National Science Foundation RERC 2005-2006

Aim:Versatile, low-cost, easy-to-adjust patient positioning aid that works with a range of examination tables…and meets the customer needs below.

  • Fictional Patients
current methods
Current Methods
  • Extremely basic; crude
  • Not patient specific.
  • System fails = movement of patient = re-administering the imaging technology
engineering analysis
Engineering Analysis
  • Design Criteria

Material Selection

engineering analysis air
Engineering Analysis: Air
  • Star ROHO Cushion

Major problem: not fixed positioning

engineering analysis foam
Engineering Analysis: Foam

Foam Selection: Types of Foams

  • Open cellular
      • interconnected pores or cells and are suitable for filtration applications
  • Closed cellular
      • Closed cellular foams do not have interconnected pores or cells, but are useful for buoyancy or flotation applications
  • Flexible
      • Flexible foams can bend, flex or absorb impacts without cracking or delaminating
  • Rigid
      • Rigid foams feature a matrix with very little or no flexibility
  • Reticular
      • Reticular foams have a very open structure with a matrix consisting of an interconnecting network of thin material strands
  • Syntactic
      • Syntactic foams consist of rigid microspheres or glass micro-balloons held together by a plastic or resin matrix
engineering analysis coverings
Engineering Analysis: Coverings
  • Naugahyde
    • A vinyl-coated, waterproof and durable fabric.
  • Nylon / Sailcloth
    • Also known as para-pak. A smooth, silky nylon material.
  • Knit
    • A stretchy woven materialóused.
  • Lycra / Neoprene / Rubatex
    • Similar to double-knit material; however, it has a laminated rubber backing; similar to wetsuit material.
  • Shelterite
    • A vinyl-coated fabric, waterproof and durable; similar to naugahyde except that it has a ridge texture.
  • Cordura
    • A woven-like nylon material with breathability.
  • Darlex / Dartex / Darflex
    • A four way stretch fabric that is water resistant and breathable.
design solution
Design Solution
  • Final Solution:
    • A patient specific positioning aid that incorporates the engineering principles of encapsulating laminar foam in a controlled air inflow/outflow environment.
  • Four major components:
    • Laminar foam, polyurethane encapsulation, air inflow/outflow mechanism, and rubatex covering.
design solution11
Design Solution
  • How does it work?
    • Air valves are open (allowing air in the system)
    • Patient positions oneself on top; causing air to escape.
    • Open cell foam contours; close air valves when no additional air is escaping.
    • Foam maintains contour; patient specific.
    • Patient is done; patient gets up; open air valves.
    • Air enters the system; open cell foam goes back to original shape.
    • Ready for next patient.
reasoning
Reasoning
  • But…why?
    • NSF RERC 2005-2006
    • Fictional Patients
  • Is there marketability ?
    • The prototype is small…the concept is broad.
      • Material is environmentally friendly for all imaging technologies
      • High level of flexibility in the dimensions
      • High level of flexibility in the material selection
is there marketability
Is theremarketability?
  • Think about it…
    • Have you ever felt pain, or discomfort from sitting down in a certain position for an extended period of time?
    • Have you ever woken up in the morning with pain because you didn’t sleep “right”?
  • Which one is more comfortable?
thank you
Thank You.

Any questions?