PANDApeep Gen3 PEEP valve

Other PEEP valves in our line-up:

Gen2: https://www.thingiverse.com/thing:4250354

Gen2 Inline: https://www.thingiverse.com/thing:4316582

Gen3: https://www.thingiverse.com/thing:4278384

PANDAcase: https://www.thingiverse.com/thing:4314931

PANDAflow: https://www.thingiverse.com/thing:4289425

UPDATE1:

Small adjustments to cover and all bases. Improved sealing area.

Team PANDA [Zurich, Switzerland]:

We propose a new 3D printed spring loaded and adjustable PEEP valve. It uses conical bicycle hub springs (thanks to Enrico Bassi for pointing these springs out to us!) which seem to be quite the same dimensions in most countries.

It attaches straight to the 30 mm standard Ambu Bag connector. There is also a base version with a 22 mm male connector. The springs are slightly on the stiff side for this job, so the 5-20 cmH2O take place in the first few turns.

For the sealing surface you can use a square piece of rubber (approx 27x27 mm). Thick gloves or bike innertube should work. If you want to print it with something like TPU, there's a file for that as well.

This is NOT a medically approved device and is not intended for medical use.

This might be interesting for teams that are trying to build ventilator prototypes and do not have a PEEP valve at hand. We also attached all STEP files should you have to change something for your setup. Please upload as derivate should it be helpful for other teams.

WARNING/DISCLAIMER:

We have tested these on our PANDA ventilator test bed but we can’t compare it to a medical PEEP valve since we don’t have one. Someone that has a medical PEEP valve should print ours and compare/benchmark it against the medical one. Please post relevant findings in the comments. These are not medically approved and should not be used on humans. Use at your own risk and liability.

The spring is magnetic. Under no circumstances bring this device near an MRI.

PRINTING:

Print without supports as shown on the Cura picture. That's important to get a good seal!! If the thread is too narrow, scale cover in X,Y-direction only.

TESTS:

We were able to adjust the PEEP pressure in the necessary range of 5 - 20 cmH2O. While leaking slightly in the lower pressure range, it kept the levels astonishingly accurate.