Large weight scale for detecting possibility of bedsore, and bedsore detecting method

A large weight scale configured to weigh a to-be-weighed subject sitting in a wheelchair, comprising:

• a rectangular weighing base on which the to-be-weighed subject gets on;
• weighing sensors disposed at four corners of the weighing base;
• and
• a control unit configured to perform arithmetic operations based on output values of the weighing sensors,
• wherein the large weight scale comprises a bedsore detecting unit configured to detect and make a notification of the possibility of the to-be-weighed subject in a wheelchair developing a bedsore based on a first sum value of output values of a pair of the weighing sensors disposed on a left side of the weighing base, a second sum value of output values of a pair of the weighing sensors disposed on a right side of the weighing base, and a third sum value of output values of all of the weighing sensors,
• wherein the bedsore detecting unit is configured to determine and make a notification that there is the possibility of developing a bedsore when an absolute value of a ratio of a difference value between the first sum value and the second sum value to the third sum value exceeds a predetermined value.