To record the fact in which a patient has made a call from a shared part as a calling history without making the patient carry a radio.
A health professional made to carry a radio 5, a first reader 6 for reading health professional identification information from a nurse call slave unit 1 and the radio 5 is installed in the shared part, and a second reader 7 for reading the health professional identification information from the radio 5 is installed near a bed. After the nurse call slave unit 1 is operated, when the first reader 6 of the shared part where the nurse call slave unit 1 is installed reads the health professional identification information and the second reader 7 reads the same health professional identification information thereafter, it is determined that a health professional has turned to the shared part in response to a call in the shared part, helped the patient there and moved to the bed. Thus, the patient who has made a call in the shared part is specified without making the patient carry the radio 5, and recording is performed as the call history data together with the time and date when the nurse call slave unit 1 is operated.
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