Determining Properties of Wound Dressings for Negative Pressure Wound Therapy
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Determining Properties of Wound Dressings for Negative
Pressure Wound Therapy
Lora Aboulmouna, Lisa Lewicki, Ryan Frye
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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
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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
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Wound Dressings
Sorbact
Gauze
KCI Foam
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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
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Proposed Design Setup
Clinical Pressure Ranges:
-50 to -120 mm Hg
Fluid
VacuumPressure
sensorsBernoulli’s Principle:
Height of water Fluid velocity Vacuum Pressure Density Head losses
Pipe Mesh Membrane
Flow meters
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Design Obstacles
Model orientation Mesh barrier Fistula vs. wound Pressure intensity Fluid analog
Water Mimic Plasma (saline)
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Future Directions
Determine dimensions of pipe Determine ideal fluid Obtain materials to build model Trial and Error
Orientation Mesh barrier
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References Borgquist O, Ingemansson R, Malmsjö M. Wound edge
microvascular blood flow during negative pressure wound therapy: examining the effects of pressures from -10 to -175 mmHg. Plast Reconstr Surg 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>.