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US 5,702,413 AGranted
Curved bristle atherectomy device and method
AssigneeSciMed Life Systems, Inc.
InventorDaniel M. Lafontaine
Life of this patent
Estimating the term…
Abstract
An medical device with hook like bristles suitable for capturing occlusive material. The device is inserted to a patient's vasculature and moved through an area of occlusion in such a way as to dislodge and capture the material causing the occlusion.
Claims13
A medical device for removing occlusive material and the like from a patient's vasculature or body cavities, the device comprising:
- an elongate flexible shaft having a proximal end and a distal end, the
- distal end being insertable into the vasculature;
- and
- a plurality of flexible bristles disposed on the distal end of the elongate shaft, wherein the bristles comprise a shape memory material that reversibly changes shape when subjected to a change in temperature beyond a transition temperature and the bristles are adapted to capture occlusive material.
1 more element
A method of removing occlusive material from a patient's vasculature, comprising the steps of:
- providing an elongate shaft having a distal end and a plurality of shape memory bristles disposed about the distal end;
- inserting the elongate shaft into the patient's vasculature;
- capturing occlusive material in the bristles by moving the shaft through the occlusive material;
- removing the elongate shaft and captured occlusive material from the patient's vasculature;
- washing the occlusive material filled bristles in a liquid having a temperature suitable for changing the bristles from a memorized curved shape to a memorized straight shape;
- and
- cooling the straightened bristles to a temperature suitable for changing the shape memory material from the memorized straight shape to the memorized curved shape.
4 more elements
A medical device comprising:
- an elongate tube having
- a proximal end and a distal end,
- a first inflation lumen and a second flushing lumen extending therethrough, and
- a retractable sheath movably disposed about the elongate tube, the sheath having an interior;
- an inflatable balloon attached to the distal end of the elongate tube and in fluid communication with the proximal end of the elongate tube via the first inflation lumen, the inflatable balloon having a smooth exterior suitable for sealing engagement with the distal end of the retractable sheath when the retractable sheath is moved over the balloon and the balloon is inflated;
- a plurality of bristles disposed about the distal end of the elongate tube proximal of the balloon;
- and
- an at least one orifice in fluid communication with the second lumen and disposed adjacent the bristles.
5 more elements
A method of removing thrombus from a patient's vasculature comprising the steps of:
- providing a catheter having a distal end, a balloon attached to the distal end, a plurality of bristles disposed about the catheter proximal of the balloon, and a retractable sheath disposed about the catheter;
- inserting the catheter, into a patient's vasculature;
- capturing occlusive material in the bristles;
- moving the sheath over the curved bristles;
- inflating the balloon, thereby sealing the bristles between the sheath and the catheter;
- flushing a lysing fluid from within the catheter, over the bristles, and back out between the catheter and the sheath;
- retracting the sheath;
- capturing additional occlusive material;
- and
- removing the catheter from the patient's body.
7 more elements
Dependencies are inferred from the claim text.