System and method for improved stent retention
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorsSyed Hossainy, Daryush Mirzaee
Life of this patent
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Abstract
An implantable medical device, such as a stent, having roughened areas on an inner surface of the device for enhancing frictional contact between the medical device and a delivery system, such as a balloon catheter to secure the medical device to the delivery system during delivery of the medical device to a body lumen of a patient. Various methods for forming the roughened areas are also provided. The roughened areas may be coated with a material, such as a non-thrombogenic material, to enhance the compatibility of the inner surface of the medical device with fluid flowing through the vessel lumen of the patient.
Claims11
In a combination of an expandable balloon of a stent delivery catheter and a balloon expandable stent mounted on the expandable balloon, the expandable stent having a body portion with an inner surface and an outer surface, and a plurality of asperities including protrusions and indentations formed on the inner surface of the body portion, the improvement comprising:
- a friction increasing coating formed on a selected area of the inner surface of the body portion, the friction increasing coating covering the plurality of asperities on said selected area, and the selected area of the inner surface having a roughness factor between approximately 40 nm and approximately 210 nm.
Dependencies are inferred from the claim text.