Team Positive Pressure (Ventilator Mk. 1)

grabcad

READ ME: Check Out Our Groundbreaking Project Proposal*CAD Assembly Name: FullCAD.ASMDescription: A doctor inputs a ventilator mode and adjustable parameters via the touchscreen display. The Raspberry Pi processes this input, delivering room air and supplemental oxygen to a piston cylinder through pinch valves controlled by timing. This sets the fraction of inspired oxygen (FiO2) delivered to the patient based on an O2 sensor reading in the inspiratory line. A crankshaft-style mechanism driven by a stepper motor compresses the piston head, forcing the air mixture into the inspiratory line. We control volume and pressure delivery through piston displacement and compression, respectively. A custom pressure relief valve maintains 60 cm H2O pressure in the inspiratory line. The air passes through a filter and y-valve before entering the ET tube via tubing connected to the expiratory and inspiratory lines. A venturi tube flow meter records pressure, flow rate, and tidal volume before the patient inhales. This device also supports spontaneous ventilation by detecting pressure drops when the patient initiates a breath. After inhalation, gases escape through a custom positive end-expiratory pressure (PEEP) valve in the expiratory line. By: Ed Chung, Prerna Gupta, James Ho, Jasmine Kamdar, Ali Kight, Aditya Sudhakar, Chen Chia Wang, Jinfay Yuan