Implantable devices formed of materials which are not readily imageable are delivered and deployed with a deployment/delivery device having one or more sensors generating a signal indicating a condition of the implantable device relative to the deployment site. For instance, the signal indicates at least one or more of the following: purchase of the implantable device with tissue, level of purchase of the implantable device with tissue, the position of the implantable device relative to the deployment site, seating of tissue with respect to the implantable device, extent of contact of the implantable device with tissue, or further information about the implantable device and/or the delivery/deployment device. As such, the implantable device need not be imaged to determine the relationship of the implantable device relative to the deployment site.