| 摘要 |
PROBLEM TO BE SOLVED: To provide a spacer and an expansion device capable of suppressing a positional deviation of the spacer when filling the spacer with a filler, thereby reliably expanding a space between bones.SOLUTION: An expansion device 10 is for expanding a space between bones and includes a spacer 18 which is configured so as to be expandable and is disposed between bones, a catheter 16 provided with the spacer 18 at its leading edge which guides a filler into the spacer 18, and a sheath 12 into which the catheter 16 is inserted, and which has a lumen 14 in which the spacer 18 before being expanded can be accommodated. The spacer 18 includes a spacer body 24 configured so as to be expandable, an introduction part 26 for introducing the filler to an expansion part 36 on the rear end side of the spacer body 24, and a bypass passage 28 for introducing part of the filler in the introduction part 26 to an expansion part 38 on the front end side of the spacer body 24. |
