Steerable device for introducing diagnostic and therapeutic apparatus into the body
An apparatus including an elongate body having a lumen extending therethrough and a steering wire, having a distal portion defining a non-circular cross-section, associated with the distal portion of the elongate body.
1. An apparatus, comprising:
an elongate body proximal portion having a proximal end and a distal end and including a wall, defining an inner surface, an outer surface and a central lumen that extends from the proximal end to the distal end, and a steering wire lumen offset from the central lumen, located within the wall between the inner surface and the outer surface, extending from the proximal end to the distal end of the elongate body proximal portion and defining a circular cross-section;
an elongate body distal portion having a proximal end secured to the distal end of the elongate body proximal portion and including a wall, defining an inner surface, an outer surface and a central lumen extending from the proximal end of the elongate body proximal portion to a distal end aperture, and a steering wire lumen offset from the central lumen, located within the wall between the inner surface and the outer surface, extending from the proximal end to the distal end of the elongate body distal portion and defining a non-circular cross-section; and
a steering wire having a proximal portion defining a circular cross-section and a distal portion defining a non-circular cross-section, the distal portion of the steering wire being operably connected to the distal portion of the elongate body at a location offset from the central lumen.
2. An apparatus as claimed in claim 1 , further comprising:
a stiffening member associated with the distal portion of the elongate body.
3. An apparatus as claimed in claim 1 , wherein the proximal portion of the elongate body is relatively stiff and the distal portion of the elongate body is relatively flexible.
4. An apparatus as claimed in claim 3 , wherein the elongate body distal portion steering wire lumen defines a substantially flat cross-section.
5. An apparatus as claimed in claim 3 , wherein the elongate body distal portion is longer than the steering wire distal portion.
6. An apparatus as claimed in claim 3 , wherein the steering wire distal portion is secured to the elongate body distal portion adjacent to the distal end aperture.
7. An apparatus as claimed in claim 3 , wherein the steering wire distal portion defines a proximal end, and the proximal end of the steering wire distal portion is located distal of the distal end of the elongate body proximal portion.
8. An apparatus as claimed in claim 3 , wherein the steering wire distal portion defines a proximal end, and the proximal end of the steering wire distal portion extends to the distal end of the elongate body proximal portion.
9. An apparatus as claimed in claim 1 , wherein the steering wire distal portion defines a substantially flat cross-section.
10. An apparatus as claimed in claim 9 , wherein the steering wire lumen in the elongate body distal portion defines a substantially flat cross-section shape corresponding to the substantially flat cross-section of the steering wire distal portion.
11. An apparatus as claimed in claim 10 , wherein the steering wire lumen in the elongate body distal portion defines cross-section dimensions that are about 0.001 inch to 0.003 inch greater than those of the steering wire distal portion.
12. An apparatus as claimed in claim 1 , wherein the steering wire distal portion is secured to the elongate body distal portion adjacent to the distal end aperture.
13. An apparatus as claimed in claim 12 , wherein the steering wire distal portion is secured to an anchoring member located within the elongate body distal portion.
14. An apparatus as claimed in claim 13 , wherein the anchoring member is defines a substantially cylindrical shape.
15. An apparatus as claimed in claim 1 , wherein the steering wire lumen is radially offset from the central lumen in the elongate body proximal portion.
16. An apparatus as claimed in claim 15 , wherein the steering wire lumen is radially offset from the central lumen in the elongate body distal portion.
17. An apparatus as claimed in claim 1 , wherein the steering wire is operably connected to the elongate body distal portion at a location within the wall between the inner surface and the outer surface.
18. An apparatus as claimed in claim 1 , wherein the steering wire lumen in the elongate body proximal portion abuts the steering wire lumen in the elongate body distal portion.
19. An apparatus as claimed in claim 1 , wherein the distal end aperture comprises an unobstructed distal end aperture.