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Determining Properties of Wound Dressings for Negative Pressure Wound Therapy

Determining Properties of Wound Dressings for Negative Pressure Wound Therapy. Lora Aboulmouna, Lisa Lewicki, Ryan Frye. What is NPWT?.

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Determining Properties of Wound Dressings for Negative Pressure Wound Therapy

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  1. Determining Properties of Wound Dressings for Negative Pressure Wound Therapy Lora Aboulmouna, Lisa Lewicki, Ryan Frye

  2. What is NPWT? The application of sub-atmospheric pressure to a sealed wound for the purpose of removing fluid and stimulating a cellular response through the mechanical stretching of wound tissue. • Process: • Material inserted into wound bed • Sealant drape • Fluid drain tube • Vacuum Applied • -50 to -120 mmHg

  3. Pioneer Technology • They aim to discover and create solutions in the healthcare community beginning with advancements in wound care while bridging the gap between healthcare technology and nature. • Green healthcare • Combined therapy of hyperbaric oxygen and negative pressure wound therapy • Discover the benefits of Sorbact and likelihood of commercial success • Mentor: Josh Smith, Vice President • Advisor: Dr. Jack Fisher, Associate Clinical Professor of Plastic Surgery

  4. Wound Dressings KCI Foam Sorbact Gauze

  5. Project Goals • To determine • Material resistance • Flow rate • Pressure gradient • Saturation points of the three materials in a negative pressure environment. • Build a model that provides a controlled environment

  6. Proposed Design Setup Clinical Pressure Ranges: • -50 to -120 mm Hg Bernoulli’s Principle: • Height of water • Fluid velocity • Vacuum Pressure • Density • Head losses • Pipe • Mesh • Membrane Vacuum Pressure sensors Flow meters Fluid

  7. Design Obstacles • Model orientation • Mesh barrier • Fistula vs. wound • Pressure intensity • Fluid analog • Water • Mimic Plasma (saline)

  8. Future Directions • Determine dimensions of pipe • Determine ideal fluid • Obtain materials to build model • Trial and Error • Orientation • Mesh barrier

  9. References • Borgquist O, Ingemansson R, Malmsjö M. Wound edge microvascular blood flow during negative pressure wound therapy: examining the effects of pressuresfrom -10 to -175 mmHg. PlastReconstrSurg In press. • Ljungh, A, N Yanagisawa, and T Wadström. "Using the principle of hydrophobic interaction to bind and remove wound bacteria." Journal of Wound Care 15.4 (2006): n. pag. Web. 6 Nov 2010. • Smith, Jan, and Peter Robertsson. Method for Dressing a Wound. , 2010. Web. 27 Oct 2010. <http://www.google.com/patents/about?id=ApHVAAAAEBAJ&dq=sorbact> • "Science Behind the Therapy — KCI." Science Behind The Therapy. Web. <http://www.kci1.com/KCI1/sciencebehindthetherapy>.

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