Patent ID: 8777887

Claim:
A medical apparatus, comprising: at least one transport element configured to transport at least one fluid, said transport element being configured to be connected to a patient; a grounding device connected to the transport element; a selector designed to vary the effectiveness of the grounding device as a function of a leakage electrical current in at least one of the transport element and the patient wherein the selector comprises a first impedance and a second impedance having different values, the selector being effective to selectively connect a grounding line to the first impedance or the second impedance; a sensor connected to the selector and effective to emit a signal indicative of a leakage electrical current in at least one of the transport element and the patient; and a circuit configured to operate the selector as a function of the signal emitted by the sensor, wherein the circuit comprises: a comparator configured to verify whether the signal emitted by the sensor indicates that the leakage electrical current is greater than a threshold value, and an operator configured to operate the selector such as that when said signal indicates that the leakage electrical current is less than the threshold value, the selector assumes a first configuration in which the connection between the medical apparatus and the ground has a first impedance value, while when said signal indicates that the leakage electrical current is greater than the threshold value, the selector assumes a second configuration in which the connection between the medical apparatus and the ground has a second impedance value which is greater than the first.