Pneumatic Extravascular Device for Variable Aortic Occlusion: Proof-of-Concept Design and Testing

Overview

Washington; Amy Hofmockel, Oak Park and River Forest Library Noncompressible torso hemorrhage (NCTH) refers to massive bleeding in the abdomen that cannot be treated via typical compression technology due to the placement of the injury. In minimally invasive surgery or triage care, intravascular devices such as the pREBOA-PRO are used to manage bleeds by partially occluding the aorta so that blood flow is restricted without inducing ischemic injury. However, in certain open surgeries— especially emergency or military operations, where imaging may be limited—NCTH may be better treated with an extravascular device that can provide comparable variable occlusion. This experiment designed and tested a novel prototype of a pneumatic, cuff-shaped device that could be wrapped around the aorta and inflated to various degrees to compress the vessel. The hypothesis was that a device of this nature could provide complete and partial occlusion on an aortic blood flow model. The device was iteratively developed using liquid injection molding with 3D printed molds and tested on a novel blood flow model using an ex vivo porcine aorta. A full prototype was unable to be developed, due to time and material limitations; thus, the hypothesis could not be fully supported or rejected. However, a modified procedure was used to test the proof-of-concept design, and, even in a limited stage of development, the prototype was able to reduce output by 10.2% (ANOVA p<.0001), demonstrating that this design shows promise for further prototyping. ILLINOIS

Competition history

• JSHS 2022 Category not listed

Resources

• National JSHS abstract book ↗

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