Pulmonary artery banding device

Abstract

Pulmonary artery banding device (1) includes an inflating banding ring (2), to be installed around the patient's pulmonary artery (PA), an extending tube (3), and an insufflating button (4), the extending tube (3) connecting insufflating button (4) to the banding inflating ring, the banding ring being configured as a C-shape hydraulic sleeve forming a support for an inflating balloon, whose external wall (2a) is formed by a thin rigid silicon layer, and whose inside wall (2b) is formed by a thin flexible silicon layer, at the apart ends of the banding ring two brims being disposed (2c) to facilitate the size banding adjustment according with the pulmonary artery calibre (PA). The banding ring are provided with holes (2e) for passage of sutures fixating the ring on the pulmonary artery of the patient; the insufflating button being configured as a cylindrical reservoir and being provided with holes (4a) for sutures.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation of PCT International Patent Application No. PCT / BR2006 / 000064, filed on Apr. 4, 2006, designating the United States of America, and published, in English, as PCT International Publication No. WO 2007 / 059594 A1 on May 31, 2007, which application claims priority to Brazilian Patent Application No. PI0505102-9 filed Nov. 22, 2005, the entire contents of each application is hereby incorporated herein by this reference.TECHNICAL FIELD [0002] This invention relates to improvements introduced in the Pulmonary Artery (PA) banding device that resulted in an adjustable device designed for treatment of several congenital heart lesions, such as those with excessive pulmonary blood flow, transposition of great arteries (TGA) and congenitally corrected transposition of the great arteries (CCTGA). BACKGROUND [0003] In general, the heart is the organ responsible for the blood circulation throughout the body. It is div...

AI Technical Summary

Benefits of technology

[0047] The inner wall of the banding ring is formed by a very thin and flexible silicone that allows centripetal distension. The applied material in the banding ring is potentially able to increase 500% in volume size, promoting a wide range of reversible constriction of the banded blood vessel.

[0048] Therefore, our new PA banding device prototype differs from earlier experimental models in that it presents a Dacron mesh that reinforces the outer layer and makes it thinner, keeping it from centrifugal distension when inflated.

[0049] In addition, the outer layer prolongs besides the silicone cuff at the distal ends of the banding ring, making it possible to choose the appropriate diameter of the banding ring according to the vessel diameter. These outer layer prolongations can be sutured to fix the diameter of the band. The Dacron mesh reduces the likelihood that the sutures will cut through the banding material.

Problems solved by technology

However, the connection between the inflation button and the extension tube used began to leak over time due to the developed high internal pressure and to the fact that is was not hermetically sealed.

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