Georges CPAP

Plastic CPAP system with no moving parts.

Current Documentation

Files in this repository are mainly for archival purposes + documentation. Source files are available here

Lowest O2 consumption rate of any CPAP system

• Only 15-30L/min flow rate for 3.5-10cmH2O

Doesn't require a flow generator

• Eliminates investment in capital equipment and repair
• Only needs an O2 source and a flowmeter

Completely open airway

• Eliminates re-breathing
• Reduces risk of barotrauma
• Decreases the work of breathing
• Accomodates patient's high peak inspiratory flow demand
• Allows use of suction catheter or bronchoscope without loss of CPAP

Depends entirely on the O2 flow rate

• Easily adjusts to patient's need (2.5-20cmH2O) simply by titrating O2 flow
• PEEP adjustable by changing flow rate, without needing an additional valve

Complete, portable, single use system

• CPAP set up in less than 2 minutes
• Weighs only 10 grams and is 2" long
• Permits CPAP without interruption during transport

🚦 Project status

Note: actually being tracked through GitHub Projects; follow the link to get a better view of the project status.

• Design
• Prototyping
• Calibration

⚙️ Manufacturing

Mask Body

• Machine: Ender3 Pro
• Nozzle size: 0.4 mm
• Layer height: 0.28 mm
• Support: only for the protruding tubes.
• Notes for the mask: use variable layer height to print the valve section at 0.15 mm, and the rest at 0.4 mm for speed.

Valve

• Machine: Anycubic Photon S
• Exposure: 3s
• Resin: basic

Notes

• We're using the Montana Mask as the basis, but @aleksclark is terrible at freecad, so if you have to tweak the mask parameters, you'll need to trim off the excess of the strap anchors using the defeaturing tool
• It should be possible to add a biofilter to this design, see above for why it's not done yet

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