PROBLEM TO BE SOLVED: To provide an electronic sphygmomanometer capable of acquiring the accurate pulse wave of a blood vessel by preventing overlap of the pulsation of a pump on the pulse wave of the blood vessel even if feeding air to the interior of an airbag by actuating two pumps and pressurizing the blood vessel of an upper arm.SOLUTION: This sphygmomanometer 1 includes: the airbag 14 for pressurizing the blood vessel by the insertion of a measurers upper arm a first pump 44 and a second pump 45 feeding the air to the interior of the airbag 14 a driving section 62 for actuating the first pump 44 and the second pump 45 a control section 56 issuing a command to the driving section 62 and, when detecting the pulse wave of the blood vessel, rotatingly actuating the first pump 44 and actuating the second pump 45 at the number of rotations lower than the number of rotations of the first pump 44 and a filter 400 cutting beat generated by a difference between the number of rotations of the first pump 44 and the number of rotations of the second pump 45.COPYRIGHT: (C)2011,JPO&INPIT【課題】2つのポンプを駆動して空気袋内に空気を供給して上腕の血管を加圧しても、ポンプの脈動が血管の脈波に重畳することを防ぎ、正確な血管の脈波を得ることができる電子血圧計を提供する。【解決手段】電子血圧計1は、測定者の上腕を挿入して血管を加圧するための空気袋14と、空気袋14内に空気を供給する第1ポンプ44と第2ポンプ45と、第1ポンプ44と第2ポンプ45を駆動する駆動部62と、駆動部62に指令を与えて、血管の脈波を検出する際に第1ポンプ44を回転駆動させ、第2ポンプ45を第1ポンプ44の回転数よりも低い回転数で駆動させる制御部56と、第1ポンプ44の回転数と第2ポンプ45の回転数との間の回転数差により生じるビートをカットするフィルタ400とを有する。【選択図】図11
