Device for treating congenital herat disease and using method thereof

Abstract

The new type of congenital heart disease treating equipment includes one expanding rack and one medical unidirectional shunting valve inside the rack. The dumbbell-shaped expanding rack may be woven with Ni-Ti memory alloy steel wire or made with titanium steel alloy, valve is biological one or polymer one. When the equipment is used, it is first conveyed to the shunting part with some conveying device through an interventional process, and then released and expanded in the shunting part. It is expanded automatically at temperature over 33 deg.c, and the valve allows blood flow to pass through the rack only in one direction. The present invention has the advantages of small trauma caused by the operation, etc.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to a treatment device for congenital heart disease, in particular to a treatment device for patients with severe pulmonary hypertension caused by blood shunting from left to right in congenital heart disease. Background technique [0002] Congenital heart disease such as ventricular septal defect, patent ductus arteriosus, atrial septal defect, etc., due to continuous abnormal shunt (left to right shunt) from the high pressure aortic system to the low pressure pulmonary artery system, resulting in increased pulmonary blood volume and increased pulmonary vascular resistance. lead to pulmonary hypertension. Under the continuous effect of increased blood flow and pressure, the function of pulmonary vascular endothelial cells changes, pulmonary vascular resistance gradually increases, and pulmonary hypertension develops progressively until right-to-left shunt occurs, that is, Eisenmenger sy...

AI Technical Summary

Problems solved by technology

Poor response to medical therapy in severe pulmonary hypertension with bidirectional shunt

Surgical closure of the channel between the systemic pulmonary circulation will seriously increase the burden on the right heart, coupled with the impact of extracorporeal circulation, protamine and general anesthesia, and the application of artificial respiration, etc., it is very easy to cause acute pulmonary artery pressure to rise and cause pulmonary hypertension crisis and death after surgery

Right ventricular assist device or artificial heart is applied to pulmonary hypertension secondary to congenital heart disease, which improves the symptoms of patients and improves the survival rate of patients. However, this device is easy to cause complications such as bleeding, infection and thromboembolism, which is expensive and permanent. The implanted device awaits further study

Some scholars use artificial atrial septal defect to treat pulmonary hypertension, and relieve the symptoms of pulmonary hypertension by reducing the right heart afterload. This method relieves the symptoms of patients to a certain extent, but the effect is not certain

Some scholars have successfully repaired the ventricular septal defect with severe pulmonary hypertension by using a one-way valve patch, which significantly improved the patient's symptoms. However, this is an extracorporeal operation under general anesthesia. Surgical technique is difficult, not easy to popularize

So far, the disease still lacks efficient, minimally invasive and easy-to-promote treatment methods

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