Abstract: A manufacturing method of a heart correction net is provided. The method includes: a first step of taking cross-sectional images of a heart in a layer direction, in which an apex and a base of the heart are connected; a second step of extracting outlines of the heart from the cross-sectional images; a third step of defining dividing points with respect to a three-dimensional shape reconstructed based on the outlines, the dividing points being defined on the outlines in a circumferential direction of the heart; a fourth step of dividing a contour of the heart in three-dimensions into divided regions based on the plurality of the dividing points, and creating development data, in which the each of the divided regions is developed on a two-dimensional plane, while an approximate shape of each of the divided regions is maintained; a fifth step of creating paper-pattern data based on the development data; and a sixth step of knitting the heart correction net with a knitting machine based on the paper-pattern data.

Abstract: Provided is an expansible catheter balloon that has a spreadable outer diameter controllable easily in treatments for a calcific aortic stenosis, rheumatic and congenital aortic stenoses and others, and that can be effectively prevented from being freely shifted and can easily be fixed at a predetermined position. The catheter balloon includes a balloon having shoulder parts made of a non-expansible material or made low-expansible and an expandable waist part, and a catheter having a catheter body to which this balloon is fitted.

Abstract: Provided is an expansive catheter balloon that has a spreadable outer diameter controllable easily in treatments for a calcific aortic stenosis, rheumatic and congenital aortic stenosis and others, and that can be effectively prevented from being freely shifted and can easily be fixed at a predetermined position. The catheter balloon includes a cylindrical balloon part that is made non-expansive or low-expansive, and a band part made of a stretchable elastic body. When a stretching force is not applied, the band part has a shorter diameter than a spread diameter of the balloon part and is wound around the center of the balloon part.

Abstract: A filter device for capturing embolic material capable of retrogradely installing a filter is provided. A filter device for capturing embolic material has a core wire moving a filter member to a target position in a blood vessel, a guide portion formed on the distal front end side of the core wire and guiding the core wire in the blood vessel, the filter member provided on the core wire and capturing a blood clot and debris, and a sheath capable of extending the core wire therethrough.