Bioadhesive materials and minimally invasive methods for adhering tissues with bioadhesive materials
Bioadhesive materials and methods for adhering biological tissues and blood vessels in a minimally invasive manner, wherein the bioadhesive materials are in folded bioadhesive sleeve configurations or in injectable bioadhesive forms adapted for delivery using minimally invasive procedures. The folded bioadhesive sleeve is disposed on the distal portions of a variety of minimally invasive devices for insertion to a target tissue site, then deployed and adhered to the target tissue site through actuation of the minimally invasive device. The injectable bioadhesive is disposed in a syringe and delivered to a target site via a catheter, then adhered to the target tissue by actuation of a minimally invasive device. Precise placement and adhesion to the target tissue site can be successfully accomplished solely through the actuation of the minimally invasive devices without the use of additional devices to assist in placement or actuation of the bioadhesive materials.
1. A folded bioadhesive sleeve for introduction to a target tissue surface using minimally invasive techniques comprising:
a multilayer bioadhesive material comprising a dry bioadhesive layer having a bottom surface and a top surface, and a non-adhesive layer disposed on the top surface of the dry bioadhesive layer;
wherein the multilayer bioadhesive material is in the configuration of a multilayer bioadhesive patch, tape, film, strip, or sheet,
wherein the multilayer bioadhesive materials is folded into a hollow sleeve shape comprising an inner passageway and an outer surface, wherein the inner passageway is defined by an inner surface formed of portions of the non-adhesive layer,
wherein the outer surface is an adhesive surface;
wherein, in a folded configuration, the multilayer bioadhesive material is configured to be in an origami-based design; and
wherein the bottom surface of the dry bioadhesive layer is micro-textured,
wherein the micro-textured surface is configured to comprise a plurality of surface imbedded microparticles, embossed micropatterns, molded micro-textures, patterned micro-textures, surface etched textures, spun micro- or nano-fibers, or combinations thereof.
2. The folded bioadhesive sleeve of claim 1 , wherein the dry bioadhesive layer has a liquid content such that placement of a surface of the dry bioadhesive layer in contact with the target tissue surface causes the dry bioadhesive layer to absorb liquid present on the target tissue surface, swell to form temporary crosslinking between the dry bioadhesive layer and the target tissue surface, and form covalent crosslinking between the dry bioadhesive layer and the target tissue surface.
3. The folded bioadhesive sleeve of claim 2 , wherein the dry bioadhesive layer comprises (i) one or more hydrophilic polymers; (ii) one or more amine coupling groups, and (iii) one or more cross linkers.
4. The folded bioadhesive sleeve of claim 1 , further comprising a hydrophobic overlayer disposed on the bottom surface of the dry bioadhesive layer.
5. The folded bioadhesive sleeve of claim 4 , wherein the hydrophobic overlayer comprises one or more oils.
6. The folded bioadhesive sleeve of claim 1 , wherein the non-adhesive layer comprises a biocompatible polymer or polymer blend.
7. The folded bioadhesive sleeve of claim 1 , wherein the origami-based design is of a triangular sleeve having a triangular shaped inner passageway.
8. The folded bioadhesive sleeve of claim 1 , wherein the triangular sleeve is sized and shaped for housing a distal portion of a minimally invasive device.
9. The folded bioadhesive sleeve of claim 8 , wherein the minimally invasive device is a balloon catheter, and the triangular sleeve is sized and shaped for housing an uninflated balloon.
10. The folded bioadhesive sleeve of claim 1 , wherein the origami-based design is of a pleated cylindrical sleeve with a plurality of wings.
11. The folded bioadhesive sleeve of claim 1 , wherein the pleated cylindrical sleeve is sized and shaped for housing a distal portion of a minimally invasive device.
12. The folded bioadhesive sleeve of claim 11 , wherein the minimally invasive device is a balloon catheter, and the pleated cylindrical sleeve is sized and shaped for housing an uninflated balloon.
13. The folded bioadhesive sleeve of claim 1 , further comprising one or more stabilizing elements disposed on the bioadhesive, including an adhesive, a tab or a string-like element, a stiffening member, or other suitable stabilizing mechanisms configured to restrict the movement, bunching, or rotation of the folded bioadhesive sleeve, during attachment to a minimally invasive device.
14. A method of adhering a bioadhesive to a tissue surface using a minimally invasive techniques, wherein the tissue surface is an inner surface of a hollow organ or vessel, comprising:
providing the folded bioadhesive sleeve of claim 1 ;
providing a balloon catheter device having an uninflated balloon on a distal end thereof;
disposing the folded bioadhesive sleeve over the uninflated balloon, with the inner passageway at least partially housing the uninflated balloon, and wherein the inner surface of the folded bioadhesive sleeve is in contact with the uninflated balloon;
inserting the balloon catheter device into the hollow organ or vessel at a target tissue surface site using the minimally invasive techniques;
inflating the balloon and allowing the folded bioadhesive sleeve to unfurl such that the outer adhesive surface contacts the inner surface of the hollow organ or vessel; and
allowing a combination of hydration of the dry bioadhesive layer in the presence of body fluids and radial pressure exerted by the inflated balloon to release the folded configuration, conform the bioadhesive material to the inner surface of the hollow organ or vessel, and trigger adhesion of the bioadhesive material to the inner surface of the hollow organ or vessel.