Method and apparatus for removing arterial constriction
First Claim
1. A cathether adapted for insertion into an artery for relieving arterial constriction caused by a body of plaque comprising a main catheter body having means including two spaced balloon elements adapted to be positioned adjacent respective proximate and distal ends of the plaque body and expansible against the arterial walls for providing a chamber about said plaque body so as to hold said main catheter body in place, means carried by said main catheter body for delivering a solution into said chamber for solubilizing said plaque body, and means including a third balloon element disposed intermediate said two spaced balloon elements and expansible for forcing said solution into said plaque body while compressing said plaque body.
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Accused Products
Abstract
A catheter is described with distal and proximate balloon segments expansible to produce a chamber around arterial plaque and a conduit for delivering solubilizing liquid into the chamber. The catheter may also contain a central expansible balloon to assist in forcing the liquid into the plaque and to compress the plaque. Several solubilizing liquids are described.
392 Citations
13 Claims
- 1. A cathether adapted for insertion into an artery for relieving arterial constriction caused by a body of plaque comprising a main catheter body having means including two spaced balloon elements adapted to be positioned adjacent respective proximate and distal ends of the plaque body and expansible against the arterial walls for providing a chamber about said plaque body so as to hold said main catheter body in place, means carried by said main catheter body for delivering a solution into said chamber for solubilizing said plaque body, and means including a third balloon element disposed intermediate said two spaced balloon elements and expansible for forcing said solution into said plaque body while compressing said plaque body.
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5. A method for relieving a constriction in an artery caused by a body of plaque which comprises the steps of:
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1. inserting into the artery a catheter comprising a main catheter body having means including two spaced balloon elements adapted to be positioned adjacent respective proximate and distal ends of the plaque body and expansible to the arterial diameter of the constricted artery against the arterial walls for providing a chamber about said plaque body so as to hold said main catheter body in place, and means carried by said main catheter body for delivering a solution under pressure into said chamber and said plaque for solubilizing said plaque body, 2. inflating said two spaced balloon elements, 3. delivering a solubilizing solution into said chamber through said solution delivering means, 4. deflating said balloon elements, and 5. removing the catheter from the artery.
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- 6. A method for relieving an arterial constriction caused by a body of plaque which comprises the steps of:
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7. inserting into the artery a catheter comprising a main catheter body having means including two spaced balloon elements adapted to be positioned adjacent respective proximate and distal ends of the plaque body and expansible against the arterial walls for providing a chamber about said plaque body so as to hold said main catheter body in place, means carried by said main catheter body for delivering a solutin under pressure into said chamber and said plaque for solubilizing said plaque body and means including a third expansible balloon element disposed intermediate said two spaced balloon elements,inflating said two spaced balloon elements,delivering a solubilizing solution into said chamber through said colution delivering means,inflating said third balloon element,deflating said balloon elements,removing the catheter from the artery.
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9. A method for relieving a constriction in an artery caused by a body of plaque which comprises the steps of:
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1. inserting into the artery a catheter comprising a main catheter body having means including two spaced balloon elements adapted to be positioned adjacent respective proximate and distal ends of the plaque body and expansible to the arterial diameter of the constricted artery against the arterial walls for providing a chamber about said plaque body so as to hold said main catheter body in place, means carried by said main catheter body for delivering a solution under pressure into said chamber and said plaque for solubilizing said plaque body, 2. inflating said two spaced balloon elements, 3. delivering a solubilizing solution into said chamber through said solution delivering means, - View Dependent Claims (12)
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10. deflating said balloon elements, andremoving the catheter from the artery;
- said solubilizing solution comprising an isotonic aqueous buffered mixture at a pH of from 7.2 to 7.6 of at least one phospholipid and at least one bile acid, having a solids content of from about 10% to 30% by volume and a water content of from 90% to 10% by volume the ratio of bile acid to phospholipid being from 50;
50 to 85;
15 by weight. - View Dependent Claims (13)
- said solubilizing solution comprising an isotonic aqueous buffered mixture at a pH of from 7.2 to 7.6 of at least one phospholipid and at least one bile acid, having a solids content of from about 10% to 30% by volume and a water content of from 90% to 10% by volume the ratio of bile acid to phospholipid being from 50;
Specification