Coronary　rotational　atherectomy　(CRA)　is　a　kind　of　percutaneous　coronary　intervention,　which　removes　calcified　tissue　through　the　grinding　tool　at　high　speed.　But　excessive　grinding　force　during　CRA　is　prone　to　occurrence　of　complications.　For　this　purpose,　based　on　polyvinylidene　fluoride　(PVDF)　film,　a　pressure　sensor　integrated　into　grinding　tool　was　fabricated,　which　can　measure　the　grinding　force　in　real-time.　In　operation,　there　is　a　deformation　in　PVDF　sensor　when　it　collides　with　vascular/calcified　tissue,　and　feedback　the　charge　signals.　A　fabricated　model　was　used　to　test　the　sensor,　which　shows　that　the　sensitivity　of　sensor　reaches　1049　mV/N,　and　the　response　and　recovery　time　are　2.240　and　1.320　ms,　respectively.　The　experimental　results　show　that　the　sensor　could　accurately　distinguish　whether　the　tool　collides　with　vessels/calcified　tissue　and　measure　real-time　grinding　force.　The　fabricated　sensor　has　great　significance　in　reducing　the　complications　caused　by　excessive　grinding　force.　©　2001-2012　IEEE.