Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Mouse Study: Real-Time Imaging Device May Improve Surgery for Congenital Colon Disease

29.02.2008
Spectral imaging identifies diseased tissue without need for biopsy

Researchers at Cedars-Sinai Medical Center are developing a spectral imaging system that could result in shorter operating times for infants undergoing surgery for Hirschsprung’s disease, according to a mouse study reported in the Journal of Biophotonics.

The study documents that in addition to its diagnostic potential, spectral imaging may provide an “optical biopsy,” allowing precise localization of a needed intervention.

Spectral imaging is based on the fact that light reflected from a target can be captured and measured by highly sensitive equipment to develop a characteristic “signature” based on wavelength. In this study, the colon tissue of six mice with the equivalent of Hirschsprung’s disease was analyzed and compared to that of controls. With repeated measurements and calculations, unique signatures for normal tissue and for diseased tissue emerged.

Spectral imaging does not detect the presence or absence of ganglion cells themselves. Instead, the spectral signature reflects differences in the composition of normal and diseased tissue.

As a result of this study in laboratory mice, human clinical trials will be planned, providing spectral imaging for intraoperative decision-making in Hirschsprung's disease, a congenital condition affecting nerve cells of the large intestine. The technology, developed at Cedars-Sinai’s Minimally Invasive Surgical Technologies Institute (MISTI) is adaptable to other types of surgery.

Hirschsprung’s usually affects specialized nerve (ganglion) cells in the lower portion of the large intestine, although the entire colon can be involved. Ganglion cells normally stimulate smooth muscle of the intestinal wall to push stool through the colon, but in sections where ganglia are missing (aganglionosis) the process comes to a halt, causing severe constipation that can lead to obstruction, massive infection and even death.

Estimated to affect one in 5,000 babies, the disease can be treated in a minimally invasive surgical procedure that removes the diseased portion of the colon and attaches the healthy colon to the anus. One of the critical portions of the operation is the accurate and precise determination of the point at which normal colon ends and disease begins. If too little colon is removed, the patient is likely to continue to develop significant constipation, but if too much is removed, chronic diarrhea may result, which can lead to other major health problems.

“The location and length of the transition zone between healthy and abnormal tissue varies considerably in Hirschsprung’s disease patients and must be precisely identified to properly perform the operation,” said Philip K. Frykman, M.D., Ph.D., Associate Director of Pediatric Surgery at Cedars Sinai and first author of the article. “The determination is routinely done by taking a number of small samples from the colon wall and sending them to the lab where a pathologist looks for the presence or absence of ganglion cells and other features. But this process may take 45 to 60 minutes, during which the operation is essentially on hold and the patient remains under general anesthesia.

“Spectral imaging, on the other hand, could provide immediate results, increasing patient safety and operating room efficiency,” added Frykman, who specializes in minimally invasive surgery for infants and children and holds a research grant from Cedars-Sinai to study Hirschsprung’s disease.

There is a financial factor, too. Reducing time in the operating room could make a difference of several thousand dollars.

“The images showed a clear distinction, and this was confirmed by pathological analysis. Based on our results, it appears that spectral imaging methods could be used during operations, in real time, to help surgeons distinguish normal from abnormal tissue, without requiring traditional biopsy,” said Daniel L. Farkas, Ph.D., vice-chairman for research in the Department of Surgery, director of the Minimally Invasive Surgical Technologies Institute, and senior author of the journal article.

Biophotonics – the interdisciplinary field dealing with interactions between biological entities and photons, basic units of light – is an emerging research area, with translational potential. Although spectral imaging and other photonic technologies have been used in advanced applications such as satellite reconnaissance for many years, only very recently have scientists begun translating these approaches into biological and medical uses.

At Cedars-Sinai and a few biophotonic research centers in the United States and Europe, spectral imaging is being studied for possible use in a variety of surgical situations. For each potential application, newly developed devices, software and criteria are evaluated in animal studies to show "proof of concept" before human clinical trials are launched.

The Journal of Biophotonics is a new, international publication covering the broad range of research on the interaction between light and biological material.

The study was supported in part by the US Navy Bureau of Medicine and Surgery.

Citation: Journal of Biophotonics, “Spectral imaging for precise surgical intervention in Hirschsprung’s Disease,” published online Feb. 25, 2008.

Sandy Van | Cedars-Sinai Medical Center
Further information:
http://www.prpacific.com

More articles from Health and Medicine:

nachricht Researchers release the brakes on the immune system
18.10.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht Norovirus evades immune system by hiding out in rare gut cells
12.10.2017 | University of Pennsylvania School of Medicine

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Physics boosts artificial intelligence methods

19.10.2017 | Physics and Astronomy

NASA team finds noxious ice cloud on saturn's moon titan

19.10.2017 | Physics and Astronomy

New procedure enables cultivation of human brain sections in the petri dish

19.10.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>