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Medical devices having an elongated steerable member are described herein. In one embodiment, a device includes an elongated body having a proximal section, a distal section, and a working lumen extending through the proximal and distal sections, a first coil having a distal portion, and a proximal

Medical devices having an elongated steerable member are described herein. In one embodiment, a device includes an elongated body having a proximal section, a distal section, and a working lumen extending through the proximal and distal sections, a first coil having a distal portion, and a proximal portion, the proximal portion of the first coil being slidable relative to the proximal section of the elongated body, and being closer to a wall of the elongated body than to an axis of the elongated body, wherein a lengthwise portion of the distal portion of the first coil is anchored to the distal section of the elongated body, and a first steering wire located within a lumen of the first coil.

대표청구항 ▼

1. An elongated medical device, comprising: an elongated body having a proximal section, a distal section, and a working lumen extending through the proximal and distal sections;a first coil having a distal portion with an open pitch, and a proximal portion with a closed pitch, the proximal portion

1. An elongated medical device, comprising: an elongated body having a proximal section, a distal section, and a working lumen extending through the proximal and distal sections;a first coil having a distal portion with an open pitch, and a proximal portion with a closed pitch, the proximal portion of the first coil being slidable relative to the proximal section of the elongated body, wherein a lengthwise portion of the distal portion of the first coil is embedded within the distal section of the elongated body; anda first steering wire located within a lumen of the first coil. 2. The device of claim 1, further comprising: a second coil having a distal portion anchored to the distal section of the elongated body, and a proximal portion slidable relative to the proximal section of the elongated body; anda second steering wire located within a lumen of the second coil. 3. The device of claim 2, further comprising a drivable instrument coupled to a proximal end of the elongated body and to the first and second steering wires, wherein the drivable instrument is configured to apply tension to the first and second steering wires. 4. The device of claim 3, further comprising a processor coupled to the drivable instrument, the processor configured to receive a user command and generate a control signal based on the user command to control the drivable instrument. 5. The device of claim 3, further comprising first and second hypotubes fixedly secured to the drivable instrument, wherein the proximal portion of the first coil is secured to the first hypotube, and the proximal portion of the second coil is secured to the second hypotube. 6. The device of claim 1, wherein the working lumen has a cross sectional area that is at least 30% of a cross sectional area of the elongated body. 7. The device of claim 1, wherein the first coil is anchored to the elongated body at a transition location between the proximal and distal sections of the elongated body. 8. The device of claim 1, wherein a loop at the distal portion of the first coil is embedded into a wall of the distal section of the elongated body. 9. The device of claim 1, further comprising a liner surrounding the proximal portion of the first coil, wherein the first coil is slidable relative to the liner. 10. The device of claim 1, wherein the lengthwise portion is at least 10 mm. 11. The device of claim 1, wherein the lengthwise portion is at least 5% of an entire length of the first coil. 12. The device of claim 1, further comprising an additional elongated body that is movably disposed around at least a part of the elongated body. 13. The device of claim 1, wherein the first coil and the first steering wire are configured to maintain a bent configuration for the distal section of the elongated body, while allowing the proximal section of the elongated body to remain flexible. 14. The device of claim 1, wherein the elongated body has a proximal tip, and the proximal portion of the first coil has a proximal tip that is proximal to the proximal tip of the elongated body. 15. The device of claim 1, further comprising a support structure embedded in a wall of the elongated body, the support structure surrounding at least a part of the working lumen and having a cross sectional shape that includes four straight sides. 16. The device of claim 1, the proximal portion of the first coil being closer to a wall of the elongated body than to an axis of the elongated body. 17. An elongated medical device, comprising: an elongated body having a proximal section, a distal section, and a working lumen extending through the proximal and distal sections;a first coil, wherein at least a lengthwise portion of the first coil is embedded within the distal section of the elongated body;a second coil in the proximal section of the elongated body that is slidable relative to the proximal section of the elongated body, wherein the second coil is axially aligned with the first coil along a length of the elongated body; anda steering wire located within a lumen of the first coil and within a lumen of the second coil. 18. The device of claim 17, further comprising a drivable instrument coupled to a proximal end of the elongated body and to the steering wire, wherein the drivable instrument is configured to apply tension to the steering wire. 19. The device of claim 18, further comprising a processor coupled to the drivable instrument, the processor configured to receive a user command and generate a control signal based on the user command to control the drivable instrument. 20. The device of claim 18, further comprising a hypotube fixedly secured to the drivable instrument, wherein a proximal portion of the second coil is secured to the hypotube. 21. The device of claim 17, wherein the first coil is embedded within a wall of the elongated body. 22. The device of claim 17, wherein a distal end of the second coil is anchored to the elongate body at a location in which there is a transition between the first and second coils. 23. The device of claim 17, further comprising a liner surrounding the second coil, wherein the second coil is slidable relative to the liner. 24. The device of claim 17, wherein each of the first coil and the second coil has an open pitch. 25. The device of claim 17, wherein each of the first coil and the second coil has a closed pitch. 26. The device of claim 17, wherein the first coil has an open pitch, and the second coil has a closed pitch. 27. The device of claim 17, wherein the lengthwise portion is at least 10 mm. 28. The device of claim 17, wherein the lengthwise portion is at least 5% of a combined length of the first coil and the second coil. 29. The device of claim 17, further comprising an additional elongated body that is movably disposed around at least a part of the elongated body. 30. The device of claim 17, wherein the first coil, the second coil, and the steering wire are configured to maintain a bent configuration for the distal section of the elongated body, while allowing the proximal section of the elongated body to remain flexible. 31. The device of claim 17, wherein the elongated body has a proximal tip, and the second coil has a proximal tip that is proximal to the proximal tip of the elongated body. 32. An elongated medical device, comprising: an elongated body having a proximal section, a distal section, and a working lumen extending through the proximal and distal sections, wherein the distal section has a tapered profile;a first coil having a distal portion anchored to the distal section of the elongated body, and a proximal portion slidable relative to the proximal section of the elongated body;a first steering wire located within a lumen of the first coil;a second coil having a distal portion anchored to the distal section of the elongated body;a second steering wire located within a lumen of the second coil;a control ring located at the distal section of the elongated body; anda spine located in the elongated body, wherein the first coil and the second coil are located radially away from an axis of the spine. 33. The device of claim 32, further comprising a drivable instrument coupled to a proximal end of the elongated body and to the first and second steering wires, wherein the drivable instrument is configured to apply tension to the first and second steering wires. 34. The device of claim 33, further comprising a processor coupled to the drivable instrument, the processor configured to receive a user command and generate a control signal based on the user command to control the drivable instrument. 35. The device of claim 32, wherein the working lumen has a tapered configuration.