Patent ID: 8827914

Claim:
A function adding device that connects to an electronic blood pressure meter, the function adding device comprising: a housing; a first connection portion that connects a first air tube; a second connection portion that connects a second air tube; a pressure sensor connected to an air passage comprising the first and second connection portions, wherein the pressure sensor is connected to the air passage through the housing, and wherein the air passage is connected to the electronic blood pressure meter at least with the first air tube interposed therebetween and is connected to an air bag at least with the second air tube interposed therebetween, the air passage, the electronic blood pressure meter, the first air tube, the second air tube and the air bag defining a closed space; at least one determination unit that, on a basis of a change in an internal pressure of the closed space that is detected by the pressure sensor, and on a basis of a pattern of a change in an internal pressure of an airbag that is associated with a permitted electronic blood pressure meter, the pattern stored in advance, determines whether or not the electronic blood pressure meter connected with the air passage is the permitted electronic blood pressure meter; a calculation unit that, on the basis of the change in internal pressure of the closed space that is detected by the pressure sensor, calculates a blood pressure value of a person to be measured to whom the air bag of the permitted electronic blood pressure meter is mounted; and a storage unit that stores the calculated blood pressure value, wherein the pressure sensor, the at least one determination unit the calculation unit and the storage unit are inside the housing.