An apparatus for measuring and detecting the pressure in a fluid being injected into a closed system, for instance, fluid being injected into a dilitation catheter, such as a balloon catheter used for the purpose of percutaneous transluminal angioplasty. The apparatus provides a pressure measuring system...http://www.google.de/patents/US4370982?utm_source=gb-gplus-sharePatent US4370982 - Method and apparatus for injecting and for controlling the pressure of fluid being injected into a catheter
