Apparatus for deploying occluding structures in body lumens
Occluding structures may be created within a body lumen by advancing a length of material distally through the body lumen. By drawing a distal location on the advanced length of material in a proximal direction, the material may be compacted into a structure which at least partially occludes the lumen. The occluding structure may be used for a variety of purposes, including removing obstructions from the body lumen, such as kidney stones from the ureter; providing hemostasis in a blood vessel; providing occlusion of a fallopian tube; temporary constraint of stone fragments in the urinary tract; capture or restraint of clot in blood vessels; and the like. Apparatus for performing the method may comprise a length of material attached at its distal end to tubular guide or other advancement member. Tensioning members may also be provided for collapsing and compacting the length of material within the body lumen.
1. Apparatus for deploying a conformal structure in a body lumen, said apparatus comprising,
a length of material consisting essentially of a flat polymeric film; and
a tension member attached to a distal location on the length of material, said tension member adapted to advance said length of material in a non-compacted configuration into the body lumen and to compact the material into an occluding structure in response to the member being pulled proximally relative to the length of material when present in body lumen.
2. Apparatus as in claim 1 , wherein the length of material compacts by folding, twisting or spiraling.
3. Apparatus as in claim 1 , wherein the tension member is embedded within the length of flat polymeric film.
4. Apparatus as in claim 1 , wherein the tension member penetrates the length of flat polymeric film at multiple spaced-apart locations along the length.
5. Apparatus as in claim 4 , wherein the length of material has fold structures between at least some of the spaced-apart locations.
6. Apparatus as in claim 1 , wherein the tension member is positioned in a plurality of connecting loops disposed at multiple spaced-apart locations along the length of material.
7. Apparatus as in claim 1 , wherein the tension member is positioned in substantially continuous passage formed in or on the length of material.
8. Apparatus as in claim 1 , wherein the tension member comprises a filament woven into the length of material.
9. Apparatus as in claim 1 , wherein the tension member is attached only at a distal end of the length of material.
10. Apparatus as in claim 1 , wherein the tension member has sufficient column strength to advance the length of material distally in the body lumen.
11. Apparatus as in claim 10 , wherein the tension member comprises a guide wire structure.