PROBLEM TO BE SOLVED: To provide a catheter for a fistula which has low invasion for a patient because resistance is reduced when inserted and extracted into/from an internal organ, and is inserted and removed safely and easily by a treating person.SOLUTION: The catheter for a fistula includes a tubular member having a nutrition passage for transdermal supply of a liquid substance such as a nutrient and a liquid medicine from an outside of a body to the internal organ, and an intracorporeal indwelling portion formed in tip side of the tubular member and allowing indwelling fixation in an inside of an organ, and the intracorporeal indwelling portion is constituted of an organ contact portion contacting with the internal organ, and an indwelling end portion formed on a distal end side of the organ contact portion, and satisfies a relation: (A)>(B) where (B) represents a hardness of the organ contact portion, and (A) represents a hardness of the indwelling tip portion.COPYRIGHT: (C)2010,JPO&INPIT【課題】体内臓器に挿入及び抜去する際の抵抗を軽減できるために、患者に対しては低侵襲であり、且つ処置者にとっては安全・容易に挿入及び抜去することができる瘻孔用カテーテルを提供すること。【解決手段】栄養剤または薬液等の液状物質を体外から体内臓器内へ経皮的に補給する栄養通路を有する管状部材と、前記管状部材の先端側に形成され臓器内にて留置固定を可能とする体内留置部と、を有する瘻孔用カテーテルであって、前記体内留置部は、体内臓器と接触する臓器接触部と、前記臓器接触部の先端側に形成された留置先端部と、から構成されるとともに、前記臓器接触部の硬度(B)と、前記留置先端部の硬度(A)との関係が、(A)>(B)であることを特徴とする。【選択図】図1
