Periodically replaceable valve scaffold group and conveyor thereof

Abstract

The invention discloses a periodically replaceable valve scaffold group and a conveyor thereof. The valve scaffold group comprises a plurality of valve scaffolds implanted into the pulmonary artery according to a sequence; because a unit joint of each valve scaffold is sewed with a valve in the size increasing progressively according to the implantation sequence, the sewed valve of each valve scaffold can open to a normal preset degree after the valve scaffold is expanded, and can attach to the outside of the cylindrical surface of the subsequently implanted valve scaffold after the subsequently implanted valve scaffold is expanded in the valve scaffold, the valve scaffold in which the valve is positioned is not needed to be taken out and the previously implanted valve is replaced by the sewed valve of the subsequently implanted valve scaffold; moreover, after the unit joint sewed with the valve of each valve scaffold is implanted, the positions of the unit joints are not overlapped, so the presently implanted valve cannot be stacked on the same part.

Description

technical field [0001] The invention belongs to the field of medical instruments, in particular to the field of interventional treatment instruments; it relates to arterial stent technology, in particular to a valve stent group and its transporter which can be replaced in stages. Background technique [0002] Pulmonary regurgitation is a common complication after surgery for congenital heart disease with pulmonary stenosis / atresia or pulmonary dysplasia. At present, the treatment of severe pulmonary valve regurgitation is mainly based on surgical pulmonary valve replacement. [0003] Since long-term pulmonary regurgitation can cause severe right ventricular dysfunction, early pulmonary valve replacement can effectively improve right ventricular function for patients. In this way, as the patient (child) grows, the implanted valve stent will not be able to meet the needs. At this time, it is necessary to remove the implanted valve stent first, and then implant a new valve ste...

AI Technical Summary

Problems solved by technology

In this way, as the patient (child) grows, the implanted valve stent will not be able to meet the needs. At this time, it is necessary to remove the implanted valve stent first, and then implant a new valve stent at the same position

[0004] However, taking out the valve stent that has been implanted is likely to lead to higher surgical complications and mortality. Therefore, in the prior art, the valve stent that has been implanted is not taken out, and a new valve stent is repeatedly implanted at the same position. However, this will cause a series of problems such as stenosis and fistula due to the overlapping and accumulation of prosthetic tissue

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