Medical Breath Mouthpiece Design
Budget: ₹1,500 – ₹12,500 INR
I need an engineer-designer who can take my concept for a medical-grade breath-sampling mouthpiece and turn it into a production-ready part. The core requirement is a passive, purely mechanical flow restrictor that caps expiratory flow at roughly 100 mL/s so the downstream analyser always receives a stable, repeatable sample.
Material and user experience
The body should be 3d printed or injection - mouldable plastic; no mixed elastomers unless you recommend a soft over-mould solely for the lip interface. Above all, the final geometry must feel natural between the lips—comfort outweighs cleaning convenience or extreme durability in this application.
Performance specifics
• Flow restriction: target 100 mL/s ±10 %, unpowered, with typical adult exhalation pressures.
• Minimal dead space to avoid sample dilution.
• Smooth internal transitions that won’t trap condensate.
Regulatory context
At this stage I am not locking into ISO or FDA certification pathways, so the shape can prioritise ergonomics and manufacturability without the paperwork overhead. That said, sound engineering practice and biocompatible plastics are expected.
What I expect to receive
1. Parametric CAD files (STEP/SolidWorks or similar) with the restrictor features fully defined.
2. Basic CFD or bench-test evidence showing the design meets the 100 mL/s target.
3. A prototype-ready STL I can print for quick functional checks.
4. Draft DFM notes for eventual injection-mould tooling.
If you have prior work in spirometry, inhalers, or other breathing interfaces, please mention it when you reply so I can review comparable parts.
Material and user experience
The body should be 3d printed or injection - mouldable plastic; no mixed elastomers unless you recommend a soft over-mould solely for the lip interface. Above all, the final geometry must feel natural between the lips—comfort outweighs cleaning convenience or extreme durability in this application.
Performance specifics
• Flow restriction: target 100 mL/s ±10 %, unpowered, with typical adult exhalation pressures.
• Minimal dead space to avoid sample dilution.
• Smooth internal transitions that won’t trap condensate.
Regulatory context
At this stage I am not locking into ISO or FDA certification pathways, so the shape can prioritise ergonomics and manufacturability without the paperwork overhead. That said, sound engineering practice and biocompatible plastics are expected.
What I expect to receive
1. Parametric CAD files (STEP/SolidWorks or similar) with the restrictor features fully defined.
2. Basic CFD or bench-test evidence showing the design meets the 100 mL/s target.
3. A prototype-ready STL I can print for quick functional checks.
4. Draft DFM notes for eventual injection-mould tooling.
If you have prior work in spirometry, inhalers, or other breathing interfaces, please mention it when you reply so I can review comparable parts.