Patent ID: 8653976

Claim:
A combination of a portable monitoring device for monitoring a medical device in the form of a portable drip infusion set for use in hospitals and the like and of the type comprising a liquid supply, a drip chamber downstream of said liquid supply for forming liquid drops and a flexible tube connecting said drip chamber with an injection needle, said monitoring device comprising: a first housing, a signal receiver for receiving a first wireless signal, a first timing device for measuring a first time interval, an alarm device for emitting a first alarm, first electronic circuitry interconnecting said signal receiver, said first timing device and said alarm device for causing said alarm device to emit said first alarm if said first signal is not received by said signal receiver at the end of said first time interval, and a first battery for providing electric energy to said signal receiver, said alarm device and said timing device, and said medical device comprising: a second housing, a signal emitter for emitting said first wireless signal, a second timing device for measuring said first time interval, second electronic circuitry interconnecting said timing device and said signal emitter for causing said signal emitter to emit said first signal at the end of said first time interval, and an electric power supply, preferably a second battery, for providing electric energy to said timing device and said signal emitter.