Patent ID: 8454592

Claim:
A medical device system comprising: first and second medical devices, each of which is used in a body cavity and surfaces of which have conductivity; a first electrode electrically connected to the surface of the first medical device; a second electrode electrically connected to the surface of the second medical device; a human body electrode plate that can come into contact with a surface of a human body outside of a body cavity; a human body electrode electrically connected to the human body electrode plate; a resistance measuring unit for measuring an inter-device electric resistance value as electric resistance between the first electrode and the second electrode and an electrode-to-human body resistance value as electric resistance between the first electrode or the second electrode and the human body electrode; a determining unit for determining, when an electric resistance value ratio as a ratio of the inter-device electric resistance value and the electrode-to-human body resistance value decreases, that the first medical device and the second medical device have come into contact with each other; and a warning generating unit for generating a warning when the determining unit determines that the first medical device and the second medical device have come into contact with each other.