Electrocardiographic and blood pressure waveform simulator device

摘要

Apparatus for simulating waveforms utilized to check the operability of a remote display device. The apparatus includes a waveform generator for providing electrical signals representing simulated waveforms. An interface circuit for coupling the waveforms to the remote display device includes a bridge network having a plurality of resistive legs in which a variable resistance element is provided in one of the legs. The variable resistance element is coupled to the waveform generator. An excitation signal from the remote display device is coupled to an input of the bridge. The electrical signals from the generator causes the resistance of the variable resistance element to correspondingly vary and provide simulated waveforms at the output of the bridge network to the remote display device. According to another aspect of this invention, the device simulates both electrocardiographic and blood pressure waveforms, with the beginning of the blood pressure waveform being delayed from the beginning of the electrocardiographic waveform so that the waves are provided in a timed sequence corresponding to waveforms that would ordinarily be supplied by a live patient. An interconnection device is also supplied for coupling the simulator device to a blood pressure monitor, with the interconnection device automatically compensating for signal variations between a variety of blood pressure monitors so that the simulator device can be universally employed.