Biomedical Researchers Develop Device to Predict Wound Healing

May 25, 2010

(PhysOrg.com) -- The new device can change the current landscape of chronic wound management.

Complex wounds affect more patients in the United States than heart attack and stroke combined, and five to seven million Americans with complex wounds account for over $20 billion in healthcare expenditures. About 150,000 amputations a year result from complex wounds, while about 80,000 are attributed to diabetes and . There are currently no established methods for early detection of wound healing, or for precise identification of healing progress. Wound size is the only accepted indicator despite its variability and the fact that is reflects only what is happening on the surface.

A new breakthrough device developed by researchers can change the current landscape of chronic wound management. Researchers at Drexel University’s School of Biomedical Engineering, Science and Health Systems developed a prototype device that measures the level of oxygenated and deoxygenated within and under a wound and compares it to a control/non-wound site of the same patient. Based on a human study at the Wound Clinic of the Drexel College of Medicine, the time course of oxygenated hemoglobin change was found to be a strong indicator of wound healing.

Diffuse Near-Infrared Spectroscopy allows tissue to be non-invasively analyzed by measuring its optical absorption and scattering coefficients. A “diagnostic window” exists at near (650 -900 nm) allowing determination of tissue at significant depths, because light is able to penetrate several centimeters into tissue due to low absorption of hemoglobin. The absorption spectra of oxy-hemoglobin and deoxy-hemoglobin are distinct at near-infrared wavelengths and with proper instrumentation the absolute concentrations of each can be determined.

A device prototype has been developed and tested over the course of several years. The device is controlled by software from a laptop computer and can move from patient to patient in a busy clinical setting. Measurements can be taken at any spot within or around the wound and take seconds to complete. Results are displayed on the computer screen almost instantly following the measurement. Improved prototypes are being designed. In its final stages the device will become more portable.

Advantages of the Drexel technology:

• Fast quantitative method for characterizing diabetic and pressure ulcers.
• Quantitative assessment of ischemic tissue in a broad variety of clinical applications.
• Ability to predict due to therapy at least 50 percent earlier (four weeks as opposed to 8 weeks or more) compared to conventional methods.

Funding for the project is supported through a Coulter Foundation Translational Research grant. The Coulter Foundation is a private, nonprofit foundation dedicated to supporting biomedical engineering translational research that addresses unmet health care needs.

Explore further: Clipping proteins that package genes may limit abnormal cell growth in tumors

add to favorites email to friend print save as pdf

Related Stories

Artificial skin system can heal wounds

Dec 20, 2007

A new study in Artificial Organs tested the effects of a wound dressing created with hair follicular cells. The findings reveal that skin substitutes using living hair cells can increase wound healing.

Wound monitor 'sniffs out' infections

Mar 14, 2006

The University of Manchester has received £1m to develop a new device able to 'sniff out' harmful infections. The funding will be used to create a non-invasive wound monitor to treat patients with severe burns, skin ulcers ...

Study uses bone marrow stem cells to regenerate skin

Jan 14, 2009

A new study suggests that adult bone marrow stem cells can be used in the construction of artificial skin. The findings mark an advancement in wound healing and may be used to pioneer a method of organ reconstruction. The ...

Gene Therapy Hastens Healing Process in Chronic Leg Ulcers

Dec 03, 2009

(PhysOrg.com) -- Chronic wounds, including venous leg ulcers which are caused by poor circulation in the veins of the legs, are difficult and expensive to treat. Researchers at the University of Pennsylvania School of Medicine ...

Recommended for you

Organovo has 3D-printed liver tissue for drug testing

Nov 20, 2014

(Medical Xpress)—The commercial release of 3D printed liver tissue was announced earlier this week. Organovo is the company behind the release. The product is intended for use for preclinical drug discovery ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.