Determining Properties of Wound Dressings for Negative
Pressure Wound Therapy
Lora Aboulmouna, Lisa Lewicki, Ryan Frye
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.
The way it works… Material inserted into wound bed Fluid drain tube Sealant Vacuum Applied (-50 to -200 mmHg)
Wound Dressings
Sorbact
Gauze
KCI Foam
Project Goal
To determine the fluid dynamic properties
of:
Sorbact
KCI Foam
Surgical Gauze
used as negative pressure wound dressings.
Variables
Pressure Gradient Flow Rate Material Resistance Material Saturation
Proposed Design Setup
C1 C2
P1 P2
Filter
Flow
Alternate Proposed Design
Flow meters
FlowFilter
Vacuum pump
Future Directions
Determine more advantageous design Meet with Dr. Fisher (Pioneer medical
advisor) Establish design specifications Obtain materials
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>.