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Patient Positioning Aid

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

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  1. Patient Positioning Aid E. Vargas, M. Britan, E. Kordieh Department of Biomedical Engineering Stony Brook University

  2. Outline • Background / Design Criteria • Engineering Analysis • Design Solution • Answer question: why? • Acknowledgements

  3. 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

  4. Current Methods • Extremely basic; crude • Not patient specific. • System fails = movement of patient = re-administering the imaging technology

  5. Engineering Analysis • Design Criteria Material Selection

  6. Engineering Analysis: Air • Star ROHO Cushion Major problem: not fixed positioning

  7. 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

  8. Engineering Analysis (cont’d) • Foam Selection

  9. 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.

  10. 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.

  11. 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.

  12. 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

  13. 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?

  14. Thank You. Any questions?

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