3D Printed Ventilator

grabcad

This ventilator is engineered to be almost entirely 3D printed, utilizing easily sourced parts whenever necessary. Control is handled by an Arduino Uno with smart LCD and knobs that allow users to adjust vent rate and tidal volume. The system relies on off the shelf connectors for ET and PEEP valves to maintain pressure in the system and operate similarly to a basic ventilator. Arduino code calculates movement based on variables set by physicians or respiratory therapists. A 1/2" ball bearing is used for the check valve, or alternatively, a marble can be employed in supply-limited situations. An 8mm lead screw with nut is included, as well as an 8mm smooth guide rod and 8mm linear bearings - optional Delrin bearings can also be printed. Nema 17 stepper motors are integrated into the system. M3 hardware is used for smooth rods, stepper mounting, lead nut mounting, and printable motor couplers. An Arduino microcontroller with desired switches and smart LCD (programmable via USB if no LCD is available) is utilized. A 12v power supply is also included, as well as a Pololu or comparable stepper driver. Hoses are used to connect the bellow to the outlet check valve, while hose clamps are employed for pump outlet and inlet. The bellows were designed to be printed with Stratasys or comparable TPU material - bearings can be printed in Delrin-like material if bearing blocks are not available. I am working on this project as part of a team of two, with myself serving as the engineer and Dr. Kurt Sobush, pediatric pulmonologist and vent expert, providing medical consultation and expertise.