Application of a therapeutic substance to a tissue location using a porous medical device
First Claim
1. A radially expandable medical device, comprising:
- a body having an interior and a porous exterior surface; and
a therapeutic coating disposed on at least a portion of the exterior surface of the body upon expansion of the radially expandable medical device;
wherein at least a portion of the therapeutic coating passes from the interior of the body to the exterior surface of the body to at least partially form the therapeutic coating; and
wherein the therapeutic coating is compositioned to transfer and adhere to a targeted tissue location to create an atraumatic therapeutic effect.
1 Assignment
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Accused Products
Abstract
A non-polymeric or biological coating applied to porous radially expandable interventional medical devices provides uniform drug distribution and permeation of the coating and any therapeutic agents mixed therewith into a targeted treatment area within the body. The coating is sterile, and is capable of being carried by a sterile medical device to a targeted tissue location within the body following radial expansion. The therapeutic coating transfers off the medical device due in part to a biological attraction with the tissue and in part to a physical transference from the medical device to the targeted tissue location in contact with the medical device. Thus, atraumatic local tissue transference delivery is achieved for uniform therapeutic agent distribution and controlled bio-absorption into the tissue after placement within a patient'"'"'s body with a non-inflammatory coating.
211 Citations
27 Claims
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1. A radially expandable medical device, comprising:
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a body having an interior and a porous exterior surface; and
a therapeutic coating disposed on at least a portion of the exterior surface of the body upon expansion of the radially expandable medical device;
wherein at least a portion of the therapeutic coating passes from the interior of the body to the exterior surface of the body to at least partially form the therapeutic coating; and
wherein the therapeutic coating is compositioned to transfer and adhere to a targeted tissue location to create an atraumatic therapeutic effect. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of applying a therapeutic coating to a targeted tissue location, comprising:
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positioning the medical device proximal to a targeted tissue location within a patient;
providing a therapeutic liquid to a radially expandable medical device to expand the radially expandable medical device;
at least one of forming and re-supplying the therapeutic coating on at least a portion of an exterior surface of the radially expandable medical device; and
smearing the therapeutic coating against the targeted tissue location, thus transferring at least a portion of the therapeutic coating to adhere to the targeted tissue location. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of applying a first therapeutic coating, a second therapeutic coating, and a third therapeutic coating to a targeted tissue location within a patient, comprising:
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providing a first medical device;
positioning the first medical device in proximity with the targeted tissue location;
radially expanding the first medical device against the targeted tissue location using a first therapeutic liquid to pressurize the first medical device;
forming the first therapeutic coating by weeping the first therapeutic liquid through a wall of the first medical device;
smearing the first therapeutic coating against the targeted tissue location;
deflating and removing the first medical device;
providing a second medical device with the second therapeutic coating, wherein the second medical device includes a balloon portion and a stent portion;
radially expanding the second medical device against the targeted tissue location using a second therapeutic liquid to pressurize the second medical device;
forming the second therapeutic coating by weeping the second therapeutic liquid through a wall of the second medical device;
smearing the second therapeutic coating against the targeted tissue location;
deflating and removing the balloon portion of the second medical device;
providing a third medical device with the third therapeutic coating;
positioning the third medical device in proximity with the targeted tissue location;
radially expanding the third medical device against the targeted tissue location using a third therapeutic liquid to pressurize the third medical device;
forming the third therapeutic coating by weeping the third therapeutic liquid through a wall of the third medical device;
smearing the third therapeutic coating against the targeted tissue location; and
.deflating and removing the third medical device.
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23. A porous balloon catheter, comprising:
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a body having an exterior surface; and
a therapeutic coating disposed on at least a portion of the exterior surface;
wherein the therapeutic coating is compositioned to adhere to the exterior surface of the balloon catheter while the balloon catheter is positioned proximal to a targeted tissue location within a patient, and then transfer to the targeted tissue location upon contact between the therapeutic coating and the targeted tissue location at the time of radial expansion to create an atraumatic therapeutic effect. - View Dependent Claims (24)
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25. A method of applying a therapeutic coating to a targeted tissue location, comprising:
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positioning a porous balloon catheter proximal to a targeted tissue location within a patient in a first interventional procedure;
weeping a therapeutic fluid through walls of the porous balloon catheter to form a therapeutic coating on the porous balloon catheter;
smearing the therapeutic coating against the targeted tissue location, thus transferring at least a portion of the therapeutic coating to adhere to the targeted tissue location during expansion of the porous balloon catheter; and
removing the porous balloon catheter from the patient. - View Dependent Claims (26, 27)
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Specification