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US 6,258,098 B1Granted
Stent placement and removal system
OwnerWilliam N. Taylor, Ian McDougallinventors
Life of this patent
Estimating the term…
Abstract
Placement and non-surgical removal of a ureteral stent is accomplished by suspending a ferromagnetic bead from an indwelling stent The bead is suspended by a flaccid tether that reduces the likelihood of patient irritation when a shortened stent is used. The bead, tether, and stent assembly are advanced into the patient as a unit via a conventional cystoscope. A magnet-tipped catheter is employed to engage the bead in the bladder and permit removal of the connected stent as the catheter is withdrawn.
Claims8
A stent assembly, comprising:
- an elongated stent having a distal end;
- a ferromagnetic member having a length substantially shorter than the length of the stent;
- and
- a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, the tether being flaccid so that the tether readily yields to all but tensile force, thereby to enable the ferromagnetic member to be suspended and movable relative to the distal end of the stent.
1 more element
A stent assembly, comprising:
- an elongated stent having a distal end;
- a ferromagnetic member having a length substantially shorter than the length of the stent;
- and
- a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the tether is configured as an endless loop.
1 more element
A stent assembly, comprising:
- an elongated stent having a distal end;
- a ferromagnetic member having a length substantially shorter than the length of the stent;
- and
- a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the stent includes a central lumen and at least one perforation, the tether extending through the perforation and a portion of the lumen.
1 more element
A stent assembly, comprising:
- an elongated stent having a distal end;
- a ferromagnetic member having a length substantially shorter than the length of the stent;
- and
- a tether having one part connected to the ferromagnetic member and another part connected to the distal end of the stent so that the ferromagnetic member is suspended by the tether at a location away from the distal end of the stent, wherein the ferromagnetic member has an opening, into which opening the tether extends to secure the ferromagnetic member to the tether.
1 more element
Dependencies are inferred from the claim text.