Perfusion balloon catheter having a magnetically driven impeller
First Claim
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1. A perfusion balloon catheter comprising:
- a first shaft having proximal and distal portions, a wall, one or more first apertures through the wall, a balloon disposed on the shaft distal of the first apertures,an inflation lumen in communication with the balloon, and a perfusion lumen in communication with the first apertures;
at least one impeller disposed in the perfusion lumen, the impeller having a predetermined shape and one or more magnets disposed thereon, the magnets adapted to magnetically couple with a magnetic source spaced away from the perfusion balloon catheter and adapted to cause rotation of the impeller anda second shaft disposed in the first shaft, through the impeller, and extending distal thereof, the second shaft having proximal and distal portions and a wall, the wall having one or more apertures in the distal portion of the second shaft, and one or more apertures distal of the impeller, a perfusion lumen disposed in the second shaft between the apertures and being in communication therewith.
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Abstract
A balloon catheter having a perfusion lumen communicating with a blood vessel, and a magnetically driven impeller disposed in the perfusion lumen to increase blood flow through the catheter and the arteries.
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Citations
17 Claims
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1. A perfusion balloon catheter comprising:
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a first shaft having proximal and distal portions, a wall, one or more first apertures through the wall, a balloon disposed on the shaft distal of the first apertures, an inflation lumen in communication with the balloon, and a perfusion lumen in communication with the first apertures; at least one impeller disposed in the perfusion lumen, the impeller having a predetermined shape and one or more magnets disposed thereon, the magnets adapted to magnetically couple with a magnetic source spaced away from the perfusion balloon catheter and adapted to cause rotation of the impeller and a second shaft disposed in the first shaft, through the impeller, and extending distal thereof, the second shaft having proximal and distal portions and a wall, the wall having one or more apertures in the distal portion of the second shaft, and one or more apertures distal of the impeller, a perfusion lumen disposed in the second shaft between the apertures and being in communication therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A perfusion catheter system comprising:
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a drive system comprising an elongated shaft having at least one magnetic surface comprising a plurality of first magnets disposed thereon, the magnetic surface adapted to rotate and be disposed on or adjacent a body surface; a catheter less than 15 French in size having proximal and distal ends, one or more lumens longitudinally disposed therein, one or more supports mounted in the lumen, and an elongated impeller having one or more second magnets disposed thereon; and the drive system adapted to rotate causing successive magnetic coupling between the first magnets and the second magnets and rotation of the impeller. - View Dependent Claims (15)
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16. A method of actively perfusing blood through a catheter comprising the steps of:
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inserting a shaft into a body lumen, the shaft having proximal and distal portions, a wall, one or more first apertures in the wall, and at least one perfusion lumen disposed distal of the first apertures and being in communication therewith, the perfusion lumen having at least one impeller disposed rotateably therein, wherein the impeller includes a plurality of magnets disposed generally side-by-side to form generally continuous magnetic thread, each magnetic thread having an opposite magnetic polarity at its outer extremity to its adjacent magnetic thread, the impeller adapted to rotate and convey blood through one of the first apertures and through the perfusion lumen upon application of a magnetic force thereto; and applying a magnetic field from a magnetic drive system external to the impeller and the body lumen by exposing at least one magnetic thread to successive magnetic drive magnets of the opposite polarity by rotating the magnetic drive so that successive magnetic coupling between the magnetic thread and the successive magnetic drive magnets rotates the impeller.
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17. A perfusion balloon catheter comprising:
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a first shaft having proximal and distal portions, a wall, one or more first apertures through the wall, a balloon disposed on the shaft distal of the first apertures, an inflation lumen in communication with the balloon, and a perfusion lumen in communication with the first apertures; and at least one impeller disposed in the perfusion lumen, the impeller having a predetermined shape and one or more magnets disposed thereon, wherein the magnets are disposed side-by-side to format generally continuous magnetic thread, each magnetic thread having an opposite magnetic polarity at its outer extremity to its adjacent magnetic thread, the impeller adapted to rotate by exposing at least one magnetic thread to successive magnetic drive magnets of the opposite polarity upon rotation of the magnetic drive wherein successive magnetic coupling between the magnetic thread and the successive magnetic drive magnets rotates the impeller.
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Specification