Patent ID: 8326401
Filing Date: 2012-12-04
Classification: A61B

Abstract:
1. An obturator for marking an intracorporeal site comprising an elongated shaft, a proximal end, a distal end, and an MRI detectable distal shaft portion which does not interfere with magnetic resonance imaging of tissue proximate thereto, the distal shaft portion having an effective amount of MRI detectable agent so as to provide a clear, T1-weighted image within an outline of the distal shaft portion upon magnetic resonance imaging thereof, the distal shaft portion having an inner lumen and the MRI detectable agent being contained in an MRI detectable gelled mass within the inner lumen, the MRI detectable gelled mass being formed of an aqueous solution of a MRI contrast agent mixed with a hydrogel, with the MRI contrast agent selected from the group consisting of Gadiolinium Sulfate, Ferric Chloride and Ferrous Gluconate, and the aqueous solution has a concentration of the MRI contrast agent of at least 0.00002 molar.