Pulmonary artery coarctation bracket for pulmonary hypertension surgery treatment

Abstract

The present invention belongs to the medical technology field and relates in particular to a blood vessel support for a tectorial membrane implanted in a pulmonary artery for a patient with congenital heart disease pulmonary hypertension, which is a constrictive support used for a surgical treatment of a pulmonary artery hypertension; the invention is characterized in that a pulmonary artery constrictive support body (9) is a hollow body of which the diameter of two ends are large, and the center diameter of the hollow body is small; both ends of the hollow body are provided with a releasablewave-shaped entry (1) and a wave-shaped exit (4); the surface of the pulmonary artery constrictive support body (9) has a polytetrafluoroethylene membrane (3), which adheres in a pulmonary artery andcan be accurately positioned; the invention is capable of lowering arising possibility of a thrombus, and is suitable for people of different ages and makes a doctor operation simple and reliable.

Description

technical field [0001] The invention belongs to the field of medical technology, and particularly relates to a covered vascular stent implanted in the pulmonary artery for patients with congenital heart disease combined with pulmonary hypertension through femoral vein or surgical thoracotomy, that is, it is used for surgical treatment of pulmonary hypertension Narrow the bracket. Background technique [0002] Pulmonary hypertension refers to a persistent increase in pulmonary artery pressure caused by various reasons. When the systolic pressure of the pulmonary artery exceeds 4.0 kPa (30 mm Hg), the diastolic pressure exceeds 2.0 kPa (15 mm Hg) or the mean pressure exceeds 2.7 kPa. Pa (20 mm Hg) is called pulmonary hypertension. According to the etiology, pulmonary hypertension can be divided into primary (unknown cause, idiopathic) pulmonary hypertension and secondary pulmonary hypertension, among which secondary pulmonary hypertension caused by congenital heart disease is...

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Problems solved by technology

But at the same time, due to the funnel-shaped design, it is difficult to ensure that the inlet and outlet are closely combined with the pulmonary artery at the same time in practical applications by using the barbed barb to prevent the displacement of the stent, which will cause different degrees of leakage, reflux, and eddy current. phenomenon, which increases the probability of thrombus formation; at the same time, it is not conducive to accurate placement to the expected site; thirdly, the device can only implant the stent into the pulmonary artery through the femoral vein route, which is useful for young patients and patients with small femoral veins. Limitations: Finally, the device is made of nickel-titanium memory alloy. Although it has the characteristics of restoring the memory shape at 37°C, the texture of the alloy is soft, and it is difficult to ensure a tight combination with the covered stent, and it is not conducive to complete deployment in the pulmonary artery. Stent displacement is more likely to occur

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