Apparatus and method for tissue adhesion

摘要

An array of a plurality of shape memory material microposts have a proximal end configured to be secured to a substrate with a tissue penetrating distal end. The microposts further have a deployment state with the microposts in a substantially straightened configuration with a substantially smooth and continuous outer surface which is substantially parallel to adjacent microposts and an engaged state wherein at least a section of the microposts assume a configuration that is not substantially parallel to adjacent microposts or is not substantially straight with a substantially smooth and continuous outer surface so as to mechanically capture tissue adjacent thereto.

主权项

1. A method for treating an aneurism, comprising:
providing an elastically expandable balloon substrate having a contact surface; forming an array of microposts extending from the contact surface of the balloon substrate, said microposts fabricated from a shape memory material and having a proximal end secured to the substrate, and a sharpened tissue penetrating distal end; elastically expanding the balloon substrate by inflation thereby deploying the microposts into the tissue of the aneurism, the microposts being disposed in a substantially straightened configuration, being substantially perpendicular to the substrate, and being substantially parallel to adjacent microposts; engaging the microposts by activation of the shape memory material after penetration into the tissue of the aneurism wherein a distal section of each micropost mechanically captures tissue adjacent thereto and said microposts are no longer substantially parallel to adjacent microposts and no longer in a straightened configuration; deflating the balloon substrate thereby causing closure of the balloon substrate and tissue of the aneurism.