Apparatus and methods for occluding a hollow anatomical structure
A clamp having at least first and second elongate clamping portions adapted to be placed on opposite sides of the hollow anatomical structure. The first and second elongate clamping portions respectively include ends coupled together with respective resilient urging members configured to urge at least one of the first and second elongate clamping portions toward the other of the first and second elongate clamping portions from an open position into a clamping position to occlude the hollow anatomical structure. The clamp includes tissue ingrowth structure on the clamping portions.
1. A device for occluding a left atrial appendage of the heart, the device comprising:
a clamp having at least first and second elongate clamping portions configured to be placed on opposite, outside surfaces of the left atrial appendage, said first and second elongate clamping portions being coupled together proximate respective ends with resilient urging members configured to urge at least one of said first and second elongate clamping portions toward the other of said first and second elongate clamping portions from an open position into a clamping position to occlude the appendage,
said clamp configured to receive the appendage in the open position and occlude the hollow interior of the appendage in the clamping position,
wherein said first and second elongate clamping portions have tissue engaging surfaces for engaging the appendage in the clamping position, and wherein said first and second elongate clamping portions and said resilient urging members are surrounded along an entire length thereof by a fabric structure that promotes tissue ingrowth in the clamping position, said fabric structure forming a closed continuous configuration lengthwise around said clamp,
wherein said first and second elongate clamping portions and said resilient urging members are formed from at least one wire member and said wire member is formed from a material having superelastic properties, and
further comprising first and second rigid titanium tubes surrounding said wire member respectively on said first and second elongate clamping portions, said first and second rigid titanium tubes positioned between said at least one wire member and said fabric structure.