Merdim Sonmez - Rockville MD, US Ozgur Kocaturk - Rockville MD, US Christina E. Saikus - Bethesda MD, US
Assignee:
THE UNITED STATES OF AMERICA, as represented by THE SECRETARY, DEPARTMENT OF HEALTH AND HUMAN SERV - Rockville MD
International Classification:
A61B 5/00 A61B 5/01 A61B 5/055
US Classification:
600411, 600423
Abstract:
The present application discloses a guidewire for magnetic resonance imaging with a single channel design to reduce complexity and to provide conspicuous tip visibility under MRI. In one embodiment, a guidewire body includes an antenna formed from a rod and a helical coil coupled together. The helical coil can have multiple windings without any gaps between the windings. The rod passes through the windings of the helical coil and is coupled to the helical coil using a conductive joint positioned at an end of the rod and at an end of the helical coil. Insulation can be positioned between the rod and the windings of the helical coil. The configuration allows visibility of the antenna along the length of a rod, except where it enters the windings of the coil. Thus, the tip visibility is enhanced as being separated from the rod.
- Bethesda MD, US Merdim Sonmez - Chevy Chase MD, US Ozgur Kocaturk - Rockville MD, US Robert J. Lederman - Chevy Chase MD, US
Assignee:
The United States of America, as represented by the Secretary, Department of Health and Human - Bethesda MD
International Classification:
A61B 17/00
Abstract:
Disclosed herein are devices and methods for closing a hole in the wall of a cardiovascular structure from the inside using a self-assembling closure device. The closure device can be delivered to the subject hole from the inside of the cardiovascular chamber using a transcatheter approach. Disclosed techniques involve deploying the closure device from the delivery device such that an endo-cameral portion of the closure device self-expands first to cover the hole from the inside, and then extra-cameral arms of the device are released to self-deploy against the outside of the wall by withdrawal of a retaining element, such as a guidewire, to secure the closure device to the wall.
- Bethesda MD, US Robert J. Lederman - Chevy Chase MD, US Merdim Sonmez - Bethesda MD, US Dominique N. Franson - Gaithersburg MD, US Ozgur Kocaturk - Rockville MD, US
Assignee:
The United States Of America, as represented by the Secretary, Dept. of Health and Human Services - Bethesda MD
International Classification:
A61F 2/24 A61B 17/221 A61B 17/00
Abstract:
Delivery devices for delivering encircling implants can include two separate limbs that are held together at a distal articulation by the implant being delivered. The implant can comprise a suture and/or a braided tube. The implant can extend through or over the limbs. The implant and at least a distal portion of the limbs can be compressible into a delivery shape that allows for advancement through the lumen of a delivery catheter. When the distal portion of the limbs move out of the delivery catheter, the limbs and implant can resiliently assume a loop shape that is complementary to a shape of a target around which the encircling implant is to be placed. The limbs are then retracted from along the implant to leave the implant in the desired delivery position. The delivery device can be used to place encircling implants around the heart or other targets, and the implant can be tightened to exert compressive force on the target.