Device and method for improving fixation of a medical device

A method for repairing a heart valve, said heart valve comprising valve tissue including an annulus and a plurality of leaflets, said method comprising:

• inserting a medical device into said heart valve, said medical device comprising first and second loop-shaped supports, and a fabric sleeve at least partly covering the first loop-shaped support, wherein the first loop-shaped support is continuous with the second loop-shaped support to form a coil-shaped body;
• positioning the first loop-shaped support such that it abuts a first side of the heart valve,
• positioning the second loop-shaped support such that it abuts a second side of the heart valve, opposite the first side, to trap a portion of the valve tissue between the first and the second loop-shaped supports,
• positioning a flange unit comprising first and second flat flanges such that it abuts said annulus comprising
• drawing the fabric sleeve from the first loop-shaped support in more than one direction to form the first and the second flat flanges comprising double layers opposed fabrics, comprising
• drawing the fabric sleeve to form the first flat flange along an outer edge of the first loop-shaped support, and
• drawing the fabric sleeve to form the second flat flange along an inner edge of the first loop-shaped support,
• wherein an inner cross-sectional diameter of the fabric sleeve is greater than a cross-sectional diameter of the first loop-shaped support such that the fabric sleeve loosely covers all, or a portion, of the first loop-shaped support with enough slack in the fabric sleeve such that fabric of the fabric sleeve is configured to form the first and the second flat flanges;
• the fabric sleeve thus being oversized in relation to the cross-sectional diameter of the first loop-shaped support;
• and
• securing said device by attaching said flange unit to said annulus.