PROBLEM TO BE SOLVED: To provide an extravascular leak detecting device for detecting the risk of leaking a chemical, which is caused when an endovascular indwelling catheter, etc., comes off a blood vessel to tissue, and also to provide a transfusion device.SOLUTION: The extravascular leak detecting device 1 includes an endovascular indwelling catheter or an indwelling needle 5 where a distal end opening 5B is indwelled inside the blood vessel 100 and a hole 30 for generating sound when passing the chemical is formed a receiving part 20 for generating a reception signal G by detecting bloodstream noise sound N which is generated in the hole 30 when the chemical W passes the endovascular indwelling catheter or the indwelling needle 5 and a control part for determining that the distal end opening 5B of the endovascular indwelling catheter or the indwelling needle is positioned inside the blood vessel 100 in a state where the reception signal is being generated by the receiving part 20 in response to the bloodstream noise sound, and determines that the distal end 5B of the endovascular indwelling catheter or the indwelling needle comes off the blood vessel 100 so as to leak the chemical W to the outer part of the blood vessel 100 in a state where the reception signal other than the bloodstream noise sound is being generated by the receiving part 20.COPYRIGHT: (C)2012,JPO&INPIT【課題】血管内留置用カテーテル等が血管から外れて薬液が組織に漏出する危険を検知できる血管外漏出検知装置及び輸液装置を提供する。【解決手段】血管外漏出検知装置1は、先端開口部5Bが血管100内に留置され、薬液を通す際に音を発生する穴部30が形成されている血管内留置用カテーテルまたは留置針5と、血管内留置用カテーテルまたは留置針5内に薬液Wを通す際に穴部30において発生する血流ノイズ音Nを検知して受信信号Gを発生する受信部20と、受信部20が血流ノイズ音に応じて受信信号を発生している状態では血管内留置用カテーテルまたは留置針の先端開口部5Bが血管100内に位置されていると判断し、受信部20が血流ノイズ音以外の受信信号を発生している状態では血管内留置用カテーテルまたは留置針の先端5Bが血管100から外れて薬液Wが血管100外に漏出していると判断する。【選択図】図1
