Team 7

Pediatric, Size-Adjustable Aortic Punch for Arterial Switch Operation

Team Members: Daniella Asare
Priya Borah
Elena Gomez
Bhavya Sharma

Team Mentors: William Tyler, PhD - SBHSE
Jon Plasencia, PhD - Phoenix Children’s Hospital

YouTube Link: View the video link below before joining the zoom meeting

Zoom Link: https://asu.zoom.us/j/82778217659

Abstract

Transposition of the greater arteries (TGA) occurs in 1 in 3,413 babies born in the U.S. In this congenital heart defect, the aorta and pulmonary valve are switched which causes cyanosis. The heart defect can be fixed through arterial switch operation (ASO), where a button of the coronary artery is cut out for the placement of the neo-aorta. However, the aortic punches that are used currently do not have pediatric diameter sizes. They have static diameters, are one-time use, and are limited to adults. Our solution is OnePunch, a pediatric size-adjustable aortic punch that uses a compass-like technique to measure the diameter of the coronary arteries and then rotates to cut and retract the coronary artery tissue. Using virtual prototyping in SolidWorks, we have been able to simulate the rotation of our device and showcase the spring and button mechanisms. Further testing with our 3D printed prototype will verify and validate the product’s specifications. Our tiered testing models involve cheese, silicon and a bovine heart to validate our device’s ability to cut through human cardiac tissue accurately at specified diameter ranges. In addition, OnePunch is a one time purchase for hospitals due to its sterilizability with medical grade stainless steel. With OnePunch, surgeons will be provided with the highest quality pediatric cardiovascular surgical tool for patients’ safety in arterial switch operation.