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 defining a proximal portion and a distal portion and including a wall defining an inner surface, an outer surface and a lumen extending from the proximal portion to an aperture in the distal portion;
a steering wire having a proximal portion defining a circular cross-section and a distal portion defining a non-circular cross-section; and
an anchoring member formed from different material than the elongate body, secured to the distal portion of the steering wire and located within the wall of the distal portion of the elongate body such that a majority of the anchoring member is between the inner surface and the outer surface of the wall.
2. An apparatus as claimed in claim 1 , wherein the lumen comprises a central lumen.
3. An apparatus as claimed in claim 2 , further comprising:
a steering wire lumen offset from the central lumen, at least a portion of the steering wire being located within the steering wire lumen.
4. An apparatus as claimed in claim 2 , further comprising:
a stiffening member associated with the distal portion of the elongate body.
5. 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.
6. An apparatus as claimed in claim 1 , wherein the non-circular cross-section comprises a substantially flat cross-section.
7. An apparatus as claimed in claim 1 , wherein the anchoring member defines a substantially cylindrical shape.
8. An apparatus as claimed in claim 1 , wherein at least a portion of the anchoring member is substantially radiopaque.
9. An apparatus as claimed in claim 1 , wherein all of the anchoring member is between the inner surface and the outer surface of the wall.
10. An apparatus as claimed in claim 1 , wherein the anchoring member is substantially cylindrical in shape.
11. An apparatus, comprising:
an elongate body defining a proximal portion, a distal portion and a distal end and including a wall defining an inner surface, an outer surface and a lumen extending from the proximal portion to an aperture in the distal end;
a steering wire having a distal portion defining a non-circular cross-section and a proximal portion, the distal portion of the steering wire being fixedly secured to the distal portion of the elongate body such that the aperture in the distal end elongate body is not obstructed; and
a handle including a handle body and a piston slidable relative to the handle body, the elongate body being attached to the piston such that the elongate body moves with the piston and the proximal portion of the steering wire being attached to the handle body such that distal movement of the piston creates tension on the steering wire.
12. An apparatus as claimed in claim 11 , wherein the non-circular cross-section comprises a substantially flat cross-section.
13. An apparatus as claimed in claim 11 , wherein the lumen comprises a central lumen.
14. An apparatus as claimed in claim 13 , further comprising:
a steering wire lumen offset from the central lumen, at least a portion of the steering wire being located within the steering wire lumen.
15. An apparatus as claimed in claim 14 , wherein at least a portion of the steering wire lumen defines a non-circular cross-section.
16. An apparatus as claimed in claim 11 , wherein the proximal portion of the elongate body is relatively stiff and the distal portion of the elongate body is relatively flexible.
17. An apparatus as claimed in claim 11 , further comprising:
an anchoring member associated with the distal portion of the elongate body and secured to the steering wire.
18. An apparatus as claimed in claim 11 , further comprising:
a stiffening member associated with the distal portion of the elongate body.
19. An apparatus as claimed in claim 11 , wherein the handle body defines longitudinal ends and the piston extends outwardly from one of the longitudinal ends.
20. An apparatus, comprising:
an elongate body defining a proximal portion, an aperture in the proximal portion and a distal portion, and including a wall defining an inner surface, an outer surface and a lumen extending from the proximal portion to an aperture in the distal portion;
a steering wire having a distal portion defining a non-circular cross-section, the distal portion of the steering wire being fixedly secured to the distal portion of the elongate body; and
a handle associated with the proximal portion of the elongate body, the handle defining an interior, an exterior, a substantially unobstructed lumen extending through the handle interior from the lumen in the proximal portion of the elongate body to the handle exterior and including a handle body attached to the proximal portion of the steering wire and a piston slidable relative to the handle body and attached to the elongate body such that the elongate body moves with the piston.
21. An apparatus as claimed in claim 20 , wherein the passage extends through the piston.
22. An apparatus as claimed in claim 20 , wherein the handle body defines longitudinal ends and the piston extends outwardly from one of the longitudinal ends.
23. An apparatus as claimed in claim 20 , wherein the non-circular cross-section comprises a substantially flat cross-section.
24. An apparatus as claimed in claim 20 , wherein the lumen comprises a central lumen.
25. An apparatus as claimed in claim 24 , further comprising:
a steering wire lumen offset from the central lumen, at least a portion of the steering wire being located within the steering wire lumen.
26. An apparatus as claimed in claim 25 , wherein at least a portion of the steering wire lumen defines a non-circular cross-section.
27. An apparatus as claimed in claim 20 , wherein the proximal portion of the elongate body is relatively stiff and the distal portion of the elongate body is relatively flexible.
28. An apparatus as claimed in claim 20 , further comprising:
an anchoring member associated with the distal portion of the elongate body and secured to the steering wire.
29. An apparatus as claimed in claim 20 , further comprising:
a stiffening member associated with the distal portion of the elongate body.
30. An apparatus, comprising:
an elongate body defining a longitudinal axis, a proximal portion and a distal portion and including a wall defining an inner surface, an outer surface and a lumen extending from the proximal portion to an aperture in the distal portion;
a steering wire having a proximal portion defining a circular cross-section and a distal portion defining a non-circular cross-section; and
an anchoring member defining a curved shape in a cross-section perpendicular to the longitudinal axis, formed from different material than the elongate body, located within the wall of the distal portion of the elongate body between the inner surface and the outer surface, and directly secured to the distal portion of the steering wire.
31. An apparatus as claimed in claim 30 , wherein the anchoring member defines a substantially circular shape in the cross-section perpendicular to the longitudinal axis.