Navigation Links
Color-changing 'blast badge' detects exposure to explosive shock waves
Date:11/29/2010

PHILADELPHIA - Mimicking the reflective iridescence of a butterfly's wing, investigators at the University of Pennsylvania School of Medicine and School of Engineering and Applied Sciences have developed a color-changing patch that could be worn on soldiers' helmets and uniforms to indicate the strength of exposure to blasts from explosives in the field. Future studies aim to calibrate the color change to the intensity of exposure to provide an immediate read on the potential harm to the brain and the subsequent need for medical intervention. The findings are described in the ahead-of-print online issue of NeuroImage.

"We wanted to create a 'blast badge' that would be lightweight, durable, power-free, and perhaps most important, could be easily interpreted, even on the battlefield", says senior author Douglas H. Smith, MD, director of the Center for Brain Injury and Repair and professor of Neurosurgery at Penn. "Similar to how an opera singer can shatter glass crystal, we chose color-changing crystals that could be designed to break apart when exposed to a blast shockwave, causing a substantial color change."

D. Kacy Cullen, PhD, assistant professor of Neurosurgery, and Shu Yang, PhD, associate professor of Materials Science and Engineering, were co-authors with Smith.

Blast-induced traumatic brain injury is the "signature wound" of the current wars in Iraq and Afghanistan. However, with no objective information of relative blast exposure, soldiers with brain injury may not receive appropriate medical care and are at risk of being returned to the battlefield too soon.

"Diagnosis of mild traumatic brain injury [TBI] is challenging under most circumstances, as subtle or slowly progressive damage to brain tissue occurs in a manner undetectable by conventional imaging techniques," notes Cullen. There is also a debate as to whether mild TBI is confused with post-traumatic stress syndrome. "This emphasizes the need for an objective measure of blast exposure to ensure solders receive proper care," he says.

Sculpted by Lasers

The badges are comprised of nanoscale structures, in this case pores and columns, whose make-up preferentially reflects certain wavelengths. Lasers sculpt these tiny shapes into a plastic sheet.

Yang's group pioneered this microfabrication of three-dimensional photonic structures using holographic lithography. "We came up the idea of using three-dimensional photonic crystals as a blast injury dosimeter because of their unique structure-dependent mechanical response and colorful display," she explains. Her lab made the materials and characterized the structures before and after the blast to understand the color-change mechanism.

"It looks like layers of Swiss cheese with columns in between," explains Smith. Although very stable in the presence of heat, cold or physical impact, the nanostructures are selectively altered by blast exposure. The shockwave causes the columns to collapse and the pores to grow larger, thereby changing the material's reflective properties and outward color. The material is designed so that the extent of the color change corresponds with blast intensity.

The blast-sensitive material is added as a thin film on small round badges the size of fill-in-the-blank circles on a multiple-choice test that could be sewn onto a soldier's uniform.

In addition to use as a blast sensor for brain injury, other applications include testing blast protection of structures, vehicles and equipment for military and civilian use.


'/>"/>

Contact: Karen Kreeger
karen.kreeger@uphs.upenn.edu
215-349-5658
University of Pennsylvania School of Medicine
Source:Eurekalert  

Related medicine news :

1. Black children more likely to die from neuroblastoma, study finds
2. Military experts provide civilian surgeons with guidance on handling bomb blast injuries
3. Professor Zvi Ram presents phase III recurrent glioblastoma survival and quality of life data from the first pivotal study of the NovoTTF-100A at 15th Annual Society for Neuro-Oncology Scientific Meeting
4. Vaccine extends glioblastoma patients survival in phase II trial
5. Addition of immunotherapy boosts pediatric cancer survival in children with neuroblastoma
6. Multidisciplinary treatment of glioblastoma multiforme can extend patients life
7. Huge pelvi-abdominal malignant inflammatory myofibroblastic tumor
8. Internationally known neuroblastoma expert reviews progress versus challenging childhood cancer
9. Experimental targeted therapy shows early promise against medulloblastomas
10. Amazing Grace Charity Golf Tournament to Raise Awareness, Funds for Neuroblastoma
11. Laser Used to Blast Away Cells Causing Irregular Heartbeat
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Color-changing 'blast badge' detects exposure to explosive shock waves
(Date:6/24/2016)... ... June 24, 2016 , ... Comfort Keepers® of San Diego, CA is excited ... To Recovery® program to drive cancer patients to and from their cancer treatments. ... highest quality of life and ongoing independence. Getting to and from medical treatments ...
(Date:6/24/2016)... ... June 24, 2016 , ... People across the U.S. are sharpening ... Talker Award, an essay contest in which patients and their families pay tribute to ... at the 2016 National Society of Genetic Counselors (NSGC) Annual Education Conference (AEC) this ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... proud to recognize Dr. Barry M. Weintraub as a prominent plastic surgeon and ... women in the world, and the most handsome men, look naturally attractive. Plastic ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... ... is actively feeding the Frederick area economy by obtaining investment capital for emerging ... the past 2½ years that have already resulted in more than a million ...
(Date:6/24/2016)... Washington, D.C. (PRWEB) , ... June 24, 2016 , ... ... Pro-Am Heroes Golf Classic Tournament held on June 20th at the Woodmont Country ... local charity, Luke’s Wings, an organization dedicated to helping service members that have been ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... India , June 24, 2016 ... Needles Market by Type (Standard Pen Needles, Safety Pen ... Therapy (Insulin, GLP-1, Growth Hormone), Mode of Purchase (Retail, ... by MarketsandMarkets, This report studies the market for the ... expected to reach USD 2.81 Billion by 2021 from ...
(Date:6/23/2016)... Research and Markets has announced the addition of ... report to their offering. ... kidney failure, it replaces the function of kidneys by removing ... thus the treatment helps to keep the patient body,s electrolytes ... Increasing number of ESRD patients & substantial healthcare expenditure ...
(Date:6/23/2016)... Research and Markets has announced the ... 2016 - Forecast to 2022" report to their offering. ... up to date financial data derived from varied research sources ... with potential impact on the market during the next five ... comprises of sub markets, regional and country level analysis. The ...
Breaking Medicine Technology: