Mechanical apparatus and method for dilating and delivering a therapeutic agent to a site of treatment
First Claim
1. A method for dilating and delivering a medicament to an obstruction in a body passageway which comprises the steps of:
- advancing a mechanical dilatation catheter to a predetermined site within a body passageway, said catheter having a cylindrically shaped expansion member coated with a medicament and an iontophoretic transport means, said cylindrically shaped expansion member being moveable between a first contracted configuration wherein said member is defined by a first dimension extending in a radial direction, and a second expanded configuration wherein said expansion member is defined by a second dimension extending in said radial direction;
applying a force on said cylindrically shaped expansion member in an axial direction to move said expansion member between said first contracted configuration to said second expanded configuration wherein said obstruction is dilated;
operating said iontophoretic means to deliver said medicament into said obstruction or body passageway;
further comprising, prior to advancing the catheter, the step of applying electrical energy to said expansion member to cause said medicament to electrically bond to said expansion member.
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Accused Products
Abstract
A mechanical dilatation and medicament delivery device for enlarging a flow passage of a vessel by dilating and delivering a therapeutic agent or medicament to an obstruction in the vessel. The present invention comprises a substantially cylindrically shaped expansion member and includes a means engaged to the expansion member for altering the distance between the proximal end and the distal end of the expansion member thereby transforming the expansion member between a diametrically contracted configuration to diametrically expanded configuration. A therapeutic agent or medicament is coated on either the expansion member, or incorporated into a substrate coated on the expansion member.
The present method comprises the steps of advancing the coated expansion member to the obstruction in a vessel and applying opposed forces on said expansion member in an axial direction to move the expansion member to an expanded configuration wherein the expansion member dilates the obstruction and the expansion member either passively or actively delivers a therapeutic agent or medicament to the obstruction.
197 Citations
29 Claims
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1. A method for dilating and delivering a medicament to an obstruction in a body passageway which comprises the steps of:
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advancing a mechanical dilatation catheter to a predetermined site within a body passageway, said catheter having a cylindrically shaped expansion member coated with a medicament and an iontophoretic transport means, said cylindrically shaped expansion member being moveable between a first contracted configuration wherein said member is defined by a first dimension extending in a radial direction, and a second expanded configuration wherein said expansion member is defined by a second dimension extending in said radial direction; applying a force on said cylindrically shaped expansion member in an axial direction to move said expansion member between said first contracted configuration to said second expanded configuration wherein said obstruction is dilated; operating said iontophoretic means to deliver said medicament into said obstruction or body passageway; further comprising, prior to advancing the catheter, the step of applying electrical energy to said expansion member to cause said medicament to electrically bond to said expansion member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification