Vascular embolism prevention device employing filters
OwnerT. Anthony Don Michael, Peter Besselinkinventors
Life of this patent
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Abstract
A method and system for preventing embolism and optimizing flow to downstream organs in a blood flow circuit incident to performance of a treatment at a location in a blood vessel, by: introducing a first filter element into the blood vessel downstream of the location so that the first filter element obturates the blood vessel; performing the treatment; introducing a second filter element into the blood vessel upstream of the location so that the second filter element obturates the blood vessel; and, after the step of performing a treatment, bringing the first and second filter elements close to one another, radially collapsing the first and second filter elements and withdrawing the first and second filter elements from the blood vessel.
Claims23
A system for preventing embolism and microembolism in a vascular system, said system comprising:
- an elongated support element;
- a first filter element with millipores carried by said support element and radially expandable from a closed condition to an open condition;
- a second filter element surrounding said support element and radially expandable from a closed condition to an open condition;
- and
- means coupled to at least one of said filter elements for moving said at least one said filter elements between its respective closed and open conditions independently of movements of the other one of said filter elements between its respective closed and open conditions,
- wherein each of said filter elements has a filter surface structured to prevent passage of particles and permit passage of blood.
A system for preventing embolism and microembolism in a vascular system, said system comprising:
- an elongated support element;
- a first filter element with millipores carried by said support element and radially expandable from a closed condition to an open condition;
- and
- a second filter element surrounding said support element and radially expandable from a closed condition to an open condition,
- wherein:
- each of said filter elements has a filter surface structured to prevent passage of particles and permit passage of blood;
- each of said filter elements has an outer edge concentric with said support element;
- at least one of said filter elements comprises:
- an armature of a resiliently deformable material;
- and
- a sheet of filter material secured to said armature and providing said filter surface;
- and
- the material of said armature is an expandable memory metal and said armature is shaped to be in an unstressed state when said one of said filter elements is in the open condition.
A method for preventing embolism and microembolism in a blood flow circuit incident to performance of a treatment at a location in a blood vessel, said method comprising:
- introducing a first filter element into the blood vessel downstream of the location so that the first filter element obturates the blood vessel;
- performing the treatment;
- introducing a second filter element into the blood vessel upstream of the location so that the second filter element obturates the blood vessel;
- and
- after the step of performing a treatment, bringing the first and second filter elements close to one another, radially collapsing the first and second filter elements and withdrawing the first and second filter elements from the blood vessel.
A method for performing angioplasty comprising:
- aligning a first balloon with an obstruction in a blood vessel, the first balloon being radially outwardly expandable;
- interposing a second balloon between the first balloon and the obstruction, the second balloon being annular and radially outwardly expandable;
- expanding the first balloon to support the second balloon;
- and
- expanding the second balloon to dilate the obstruction.
A system for performing angioplasty comprising:
- a first balloon movable into alignment with an obstruction in a blood vessel, the first balloon being radially outwardly expandable;
- a second balloon movable into a position where the second balloon is interposed between said first balloon and the obstruction, said second balloon being annular and radially outwardly expandable;
- means coupled to said first balloon for expanding said first balloon to support the second balloon;
- and
- means coupled to said second balloon for expanding said second balloon to dilate the obstruction.
A filter element for use in a blood vessel during angioplasty, said element being made of a flexible, radially compressible, radially expandable material, said element being formed to have a conical configuration when radially expanded and being composed of a plurality of circumferential, curved strips and a plurality of longitudinal struts interconnecting said strips, said strips and struts delimiting filter openings.
Dependencies are inferred from the claim text.