PROBLEM TO BE SOLVED: To provide an indwelling needle being hardly pulled out from a biological body while continuously supplying liquid to a position closer to a surface of the biological body.SOLUTION: Each of indwelling needles 110 injecting liquid into a biological body while being indwelled in the biological body comprises: a tubular portion 111 having a hollow region transporting the liquid and a non-hollow tip portion 112 being closer to a tip side than the tubular portion. Each tubular portion has through-holes 111A and 111B causing the hollow region to communicate with an outside. Further, a fixing member for fixing the indwelling needles to the biological body is provided. The fixing member is fixed by causing a fixing surface to adhere to a surface of the biological body. Each of dimensions from the fixing surface of the fixing member to the through-holes corresponds to a depth of a dermal layer of the biological body.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2017,JPO&INPIT【課題】生体の表面に近い位置に液体を継続的に供給しつつ、生体から抜けにくい留置針を提供する。【解決手段】生体に留置させつつ生体に液体を注入する留置針110は、液体を輸送する中空の領域を有する管状部111と、管状部よりも先端側の非中空の先端部112とを備え、管状部は中空の領域と外部とをつなぐ貫通孔111A,111Bを有する。また、生体に対して留置針を固定するための固定部材が設けられ、固定部材は、固定面を生体の表面に貼着することにより固定され、固定部材の固定面から貫通孔までの寸法は、生体の真皮層の深さに相当する。【選択図】図7
