Endovascular catheter for magnetic navigation under MR imaging guidance: evaluation of safety in vivo at 1.5T.

ABSTRACT:

Background and purpose

Endovascular navigation under MR imaging guidance can be facilitated by a catheter with steerable microcoils on the tip. Not only do microcoils create visible artifacts allowing catheter tracking, but also they create a small magnetic moment permitting remote-controlled catheter tip deflection. A side product of catheter tip electrical currents, however, is the heat that might damage blood vessels. We sought to determine the upper boundary of electrical currents safely usable at 1.5T in a coil-tipped microcatheter system.

Materials and methods

Alumina tubes with solenoid copper coils were attached to neurovascular microcatheters with heat shrink-wrap. Catheters were tested in carotid arteries of 8 pigs. The catheters were advanced under x-ray fluorosco

SUBMITTER: Hetts SW 

PROVIDER: S-EPMC3850396 | biostudies-literature | 2013 Nov-Dec

REPOSITORIES: biostudies-literature