This project includes designs for 3D-printed ventilator "Y" splitters, 3D printed flow restrictors, and Raspberry Pi software to monitor per-patient respiratory flow with a Sensirion SFM-3x00 series inline flow sensor
We are releasing our work early and often, and in a form that we hope interested individuals can reproduce.
Contributors to this project submit their work under a Creative Commons ShareAlike 4.0 license. See LICENSE.md for more details
- 2020-03-29 7:30PM EST - Raspberry pi image now available for download
April 4th Video Update - Tobin discusses their progress testing the SplitVent system at the simulation lab at Indiana University.
SplitVent Daily Update March 30 - Showcase improvements to the UI, a 3D printed cap to the flow sensor, revisions to valves including larger handles that make it easier to operate.
SplitVent System Description March 29 - Demonstrate how restricter valves and flow monitoring can allow quality vantilation to multiple patients with one ventilator.
- Splitter and flow restrictor model dimensions are optimized for FDM, SLA, SPD and DLP printers.
- Print at best rsolution for your printer. FDM printers should use .2mm layer height and .12mm layer height for best results.
- TPU material can be used to print o-ring models or use ISO 3601-012 o-rings.
- Materials such as Med610, Dental SG/LT, and Teeth A2 should be considered for sterilization purposes.
- Models printed using an FDM printer should use 10-20% infill with supports touching buildplate and a brim or raft is suggested when printing the flow restrictor body for stabilization.
Fabricate a cable to connect to the sensor's connector surface contact lands.
Connect your RPi to the Sensirion sensor as shown in the image below:
Download the RPi disk image, unzip, and write to an 8GB or greater SD card. Follow the instructions here
Install the SD card into the RPi
Plug in an HDMI monitor
Power on the RPi
Hit ctrl-c a few times to stop the console app
run "git pull" to get latest GUI changes
logout
You'll see a UI like this:
- Tobin Greensweig
- Nate Surls
- Paul Holland
- Timothy Nisi
- Paul Yearling
- Brian Overshiner
- Joe Koberg
- Dan Lash