Patent ID: 8206310

Claim:
A blood pressure measuring apparatus comprising: a measuring fluid bladder; a supply part configured to supply a fluid to said measuring fluid bladder; a measuring fluid bladder compressing part configured to compress said measuring fluid bladder in a direction of a measurement region; a sensor configured to measure an internal pressure of said measuring fluid bladder; a compression degree detector configured to measure a compression degree of said measuring fluid bladder compressed by said measuring fluid bladder compressing part; and a first controller configured to control the compression degree of said measuring fluid bladder by said measuring fluid bladder compressing part in at least three phases, wherein a first phase occurs when a predetermined amount of fluid is supplied to said measuring fluid bladder at start of measurement, a second phase occurs when said measuring fluid bladder is compressed against said measurement region to a predetermined compression degree by said measuring fluid bladder compressing part after said first phase, a third phase occurs when a fluid is supplied to said measuring fluid bladder and then is discharged after said second procedure, and said first controller controls said compression degree by said measuring fluid bladder compressing part based on the internal pressure of said measuring fluid bladder in said third phase.