[Ground-isolated input circuits of the electronic diagnostic apparatus as means of increasing electric safety of the patient].

Introduction into the medical practice of new diagnostic and therapeutic methods, such as electric stimulation, measurement of intracardiac blood pressure, of pH and others, entails possible hazards for the patient to suffer an electric current injury. To ensure the patient's safety during various disturbances in the operation of the devices certain protective measures have to be devised. On an example of the electrocardiograph possible methods of accomplishing complete isolation of the patient from the ground through separating the signal and supply circuits is shown.