A portable instrument system is provided for the testing of pressure and flow characteristics of implantable ventricular shunt valves using a gaseous testing fluid that may be drawn from the testing environment. The system includes a rate pump having a control mechanism that provides a variety of selective...http://www.google.es/patents/US4598579?utm_source=gb-gplus-sharePatente US4598579 - Portable instrument to test pressure/flow of ventricular shunt valves
Portable instrument to test pressure/flow of ventricular shunt valves
