METHODS AND DEVICES FOR CATHETER ADVANCEMENT AND DELIVERY OFSUBSTANCES THERETHROUGH

摘要

Methods and devices for successively advancing a plurality of catheters o ver a guide element to a body tissue are described. In some of the methods, the guide element may be attached to the body tissue, which may be accessibl e minimally invasively. In certain variations, the guide element may not be detached from the body tissue after the catheters have been advanced over th e guide element. The methods may further comprise deploying at least one imp lant from at least one of the plurality of catheters. In some variations, a method may comprise advancing a first delivery catheter to a first region of a body tissue, deploying a first anchor from the first delivery catheter, w here the first anchor is attached to a guide element, proximally withdrawing the first delivery catheter, advancing a second delivery catheter over the guide element, and deploying a second anchor from the second delivery cathet er.