| abstract |
The biocompatible nanoparticle 1 having the bioactive material encapsulated and positively modified on the surface thereof is electrically attached to the balloon portion 9 of the catheter body 5 via the negatively chargeable resin layer 11 to form the nanoparticle layer 12. ). After the catheter body 5 is placed in the living body, the nanoparticles 1 are gradually eluted from the nanoparticle layer 12 and efficiently introduced into the cells. |