| 摘要 |
<p>Disclosed is a treatment instrument to be used in a blood vessel the outflow of which from the blood vessel is prevented, which requires no special catheter, and by which an embolus can be arbitrarily removed in the blood vessel. Specifically disclosed is a treatment instrument to be used in a blood vessel comprising microparticles of a pH-responsive water-swellable polymer which swell in water at pH 7 or higher and, after swelling in water, have an average particle diameter of 50-100 µm.</p> |
