Pulmonary artery support and pulmonary artery valve replacement device with same

Abstract

The invention discloses a pulmonary artery support and a pulmonary artery valve replacement device with the same. The pulmonary artery support comprises a tubular support net rack, an inflow section and an outflow section, wherein the inflow section and the outflow section are connected to two axial ends of the support net rack and are radially expanded to form flareouts; the part, adjacent to the outflow section, of the support network rack is provided with a plurality of first cells distributed in the circumferential direction; the outflow section is composed of a plurality of positioning strips which are sequentially distributed in the circumferential direction of the support network rack; the middle of each positioning strip is bent toward the outflow direction; two ends of each positioning strip are connected with the top points of two separated first cells. The pulmonary artery valve replacement device comprises the pulmonary artery support, and a prosthesis valve fixed in the pulmonary artery support. The pulmonary artery support disclosed by the invention is unlikely to cause damage to blood vessels and has little blocking effect on blood flow.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a pulmonary artery stent and a pulmonary valve replacement device with the pulmonary artery stent. Background technique [0002] For patients with cyanotic congenital heart disease with narrow right ventricular outflow tract, thoracotomy under cardiopulmonary bypass should be performed in infants or early childhood. [0003] Tetralogy of Fallot (TOF) is the most common form of congenital heart disease with cyanotic right ventricular outflow tract stenosis. According to data from Shanghai Children's Medical Center, the most common age of patients undergoing TOF surgery is 6 months to 3 years old, and patients in this age group account for 74% of the total number of operations. Classic surgery includes VSD repair, right ventricular outflow tract obstruction and relief of pulmonary artery (annulus and valve) stenosis. [0004] Usually, most tetralogy of Fallot is complicat...

AI Technical Summary

Problems solved by technology

[0007] The pulmonary valve replacement device in the prior art is composed of a mesh stent made of memory metal material and a unidirectionally openable trileaf valve sewn into the stent. Figure 10 It shows a pulmonary artery stent of an existing pulmonary valve replacement device, which has a mesh saddle-shaped cylindrical structure, and the mesh structure is composed of regular rhombuses. The pulmonary artery stent is located at the end of the pulmonary artery close to the branch of the pulmonary artery and is distributed circumferentially The diamond-shaped top of the pulmonary artery stent is sharp and dense. During the release process of the stent, the sharp top can easily puncture the blood vessel, which increases the difficulty and risk of the operation. In addition, the diamond-shaped structure of the pulmonary artery stent is dense and has a strong blocking effect on blood flow. The blood flow of the pulmonary artery flows smoothly into the left and right pulmonary artery branches

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