Problem to be solved: to provide an internal pressure display device of a cuff capable of continuously displaying the internal pressure of a correct cuff even if an internal pressure of a sudden cuff is increased. The internal pressure indicator 14 has a housing 1, which has a spring 2, a bellows 3, a cap 6 and an anti blocking projection 9, an internal space 7 for housing a crush preventing projection 9, a tube connection portion 4 which can be bonded to a cuff expanded tube, and a syringe An internal pressure display device for a cuff including a valve 5 which can be opened and connected, an outer passage 8 connecting the space in the bellows and the outside of the housing, and a communication passage 10 connecting the valve and the internal space. Diagram【課題】急激なカフの内圧の上昇があっても、その後は正しいカフの内圧を表示し続けることができるカフの内圧表示装置を提供する。【解決手段】前記の内圧表示装置14はハウジング1を有し、該ハウジングは、バネ2、蛇腹3、キャップ6及びつぶれ防止突起9を収容する内部空間7、カフ膨らましチューブに接合可能なチューブ接続部4、シリンジに接続可能な開閉可能なバルブ5、該蛇腹内の空間とハウジング外部をつなぐ外部通路8、及び該バルブと該内部空間を結ぶ連絡通路10を含むカフの内圧表示装置である。【選択図】図1
