Each year approximately 2000 children are born with a form of congenital heart disease that would benefit from mechanical restriction, or banding, of the pulmonary artery. [1,2] Installing or changing the setup of the banding requires an open chest surgery and during the first 6 months of the patient’s life, physiological parameters evolve rapidly, resulting in need for frequent reoperations. Mortality for those treated patients may be as high as 10–20%.  While many devices have been patented, none of them have been adopted due to size, adjustability, or reliability constraints with regard to implantation in newborns, especially below 6 months of age. Here we present the conception, design, and scale model testing of a novel pulmonary banding system for infants. This system features a hydraulic mechanical stepper actuator that offers great advantages in both reliability and compactness. As a proof of concept, we built a 5:1 scale working prototype that demonstrated the desired functionality of the device. Further steps involve scaling down the device so first porcine trials can be started.
Hydraulic Remotely Adjustable Pulmonary Artery Banding
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Dal Pozzo, D., Deterre, M., Eggenspieler, D., Lobovsky, M., Pigula, F., and Slocum, A. H. (August 10, 2010). "Hydraulic Remotely Adjustable Pulmonary Artery Banding." ASME. J. Med. Devices. June 2010; 4(2): 027526. https://doi.org/10.1115/1.3443318
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