Patent ID: 9629715
Date: 2017-04-25
CPC Classifications: A61B,A61F

Claim:
1. A device for regulating blood pressure between a patient's left atrium and right atrium, the device comprising: a metallic stent defining a lumen having a neck region and first and second flared end regions, the neck region disposed between the first and second end regions and configured to engage the fossa ovalis of the patient's atrial septum; a one-way tissue valve disposed in the lumen and having an outlet coupled to a first portion of the first flared end region, a cross-sectional flow area, and an inlet coupled to a second portion of the first flared end region proximal to the neck region, the valve configured to shunt blood from the left atrium to the right atrium through the cross-sectional flow area when blood pressure in the left atrium exceeds blood pressure in the right atrium; and a biodegradable material disposed in the lumen on the neck region of the stent to reduce the cross-sectional flow area after initial implantation of the device, the biodegradable material configured to biodegrade at a rate to maintain the cross-sectional flow area within the lumen to offset changes in the cross-sectional flow area caused by tissue ingrowth within the lumen.