Medical device having bonding regions and method of making the same
View Patent ↗Medical devices having bonded joints are disclosed. The bonded joints include two surfaces bonded by a layer of phenoxy resin therebetween. In the preferred embodiments, bonded surfaces include materials that are suitable for medical devices. Most preferably, Nitinol includes at least one bonded surface, however, other preferred materials may include, but are not limited to cobalt chromium, stainless steel, titanium, tantalum, and plastic. An intraluminal device including a plurality of locations with a phenoxy resin layer is also disclosed wherein the phenoxy resin further includes a radioopaque additive, a lubricious additive, or both radioopaque and lubricious additives. Also disclosed is an intraluminal device having contiguous heterogeneous structural elements of metallic members and non-metallic sections that are bonded together by a layer of phenoxy resin therebetween.
1. A medical device comprising:
a first member made from nitinol having a first surface with an available surface oxygen;
a second member made from nitinol having a second surface with an available surface oxygen;
a bonding agent comprised of polyhydroxyl ether having a plurality of secondary hydroxyl functional groups with an affinity to form hydrogen bonds with oxygen, the bonding agent being cooperatively associated with the first member and the second member in such a manner as to cause the bonding agent to contact the first surface and the second surface, the bonding agent configured to affix the first member relative to the second member by forming a covalent bond between the available surface oxygen on the first and the second surfaces and the hydroxyl functional groups of the bonding agent.
2. The medical device of claim 1 wherein at least one of the first member and the second member have an oxide surface.
3. The medical device of claim 2 wherein the oxide surface is a passivated oxide surface.
4. The medical device of claim 1 wherein the nitinol is in a martinsitic phase at zero applied stress.
5. The medical device of claim 4 wherein the nitinol has an A f temperature greater than about 37 degrees Celsius.
6. The medical device of claim 1 wherein the nitinol is in an austenitic phase at zero applied stress.
7. The medical device of claim 6 wherein the nitinol has an A f temperature between about 10 degrees Celsius and about 37 degrees Celsius.
8. The medical device of claim 1 wherein the polyhydroxyl ether is a phenoxy resin.