Department Internal medicine
Prof. Dr. med. Herbert Neumann
Professor at the Ruhr-University-Bochum for internal medicine.
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Latest entry from the department of Internal medicine:
Ball valve
Ball valve History The mechanism of the patented wine bottle stopper from 1858 was the inspiration for the development of the ball valve (Halhuber 1989). C.A. Hufnagel, who first described the valve, designed it in 1951 before the introduction of extracorporeal circulation. This valve was used to...
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