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Tuesday, Aug 27, 2013 11:09:05
neurope.eu
app2.jpg 
New app provides support during liver operations
German surgeons operate liver cancer using tablet
by Stanislava Gaydazhieva
22/08/2013 - 12:35pm
The first of its kind liver cancer operation with the help of a tablet took place in Germany on 15 August, local media report.
According to news reports, the operation was conducted by the surgical team at the Asklepios Klinik Barmbek in Hamburg. The intervention successfully tested a new app for tablets promising support for surgeons in reducing the rate of complications during operations.
The app was developed by Fraunhofer Institute for Medical Image Computing (MEVIS) in Bremen and is based on the established MEVIS software for liver operation planning that is employed in clinics worldwide and has been used for more than 6000 patients.
The institute explains that the software can reconstruct the locations of blood vessels in the liver for each patient. Before an operation, surgeons can precisely plan how and where to place the scalpel to most effectively remove a tumor.
"With our app, the entire set of planning data can be shown directly on the operating table," says MEVIS computer scientist Alexander Köhn.
The app has also another function- once the tablet films the liver with the integrated camera during the operation, the app could superimpose the planning data and a branched network shows the vessel system in different colours.
"Using this function, we can virtually look into the organ and make the tumor and vessel structures visible" says Prof. Dr. Karl Oldhafer, chief of the department of surgery at the hospital in Hamburg.
Not only this simplifies comparison to determine whether the intervention has gone according to plan, but "with this new technology, we are able to better implement computer-supported operation planning for tumor removal," continues Prof. Oldhafer.
Experts say that a liver cancer operation usually lasts many hours because the organ is difficult to operate. It hosts a branching vessel structure through which one and a half liters of blood flow every minute. If a surgeon makes a cut in an inappropriate place, this puts the patient at risk of severe blood loss.
Until now, surgeons have had to memorize the precise location of important blood vessels in organs and where tumors could likely be found and need to be removed.
The Fraunhofer MEVIS app is designed to support surgeons in reducing the rate of complications during operations. According to its developer Alexander Köhn, the tablet app offers helpt to surgeons in three ways – it helps them measure the length of a vessel to be removed; it provides a virtual 'eraser' for removed vessels on the tablet screen and calculates which parts of the liver will no longer be sufficiently supplied with blood. The last is said to let the surgeon better estimate whether the remaining organ volume is large enough for the patient to survive in cases when during the operation a tumor is judged to be larger than at first thought.
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发表于 2013-8-27 17:41
