PROBLEM TO BE SOLVED: To provide an extracorporeal circulation circuit capable of removing air bubbles generated during extracorporeal circulation reliably with a simple configuration.SOLUTION: An extracorporeal circulation circuit 1 comprises: a blood removal line 11 a blood feeding line 12 an artificial lung 10 provided between the blood removal line 11 and the blood feeding line 12 for performing gas exchange to blood B flowing down in the blood removal line 11, and feeding the gas-exchanged blood B to the blood feeding line 12 a gas supply line 18 for supplying the artificial lung 10 with gas G that includes at least oxygen but includes no nitrogen substantially and a bypass line 13 for connecting the blood removal line 11 and the blood feeding line 12 while bypassing the artificial lung 10.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】体外循環中に生じた気泡を、簡単な構成で確実に除去することができる体外循環回路を提供すること。【解決手段】体外循環回路1は、脱血ライン11と、送血ライン12と、脱血ライン11と送血ライン12との間に設けられ、脱血ライン11を流下してきた血液Bに対しガス交換を行ない、ガス交換が行われた血液Bを送血ライン12に送る人工肺10と、少なくとも酸素を含むが、窒素を実質的に含まないガスGを人工肺10に供給するガス供給ライン18と、人工肺10を迂回して、脱血ライン11と送血ライン12とを接続する迂回ライン13とを備える。【選択図】図1
