This design is a result of a collaboration with a team of biomedical engineers who developed a paper-based sensor that can be used for respiration monitoring. The first application of this technology was for an at-home Sleep Apnea diagnosis device. 

Existing sleep tests require expensive equipment and hospital stays. The idea was to replace this with a low-cost at-home diagnosis device.  

Most Sleep Apnea devices do not allow the user to directly engage with their diagnosis results. The app allows the user to see the progress of their diagnosis, while also allowing them to monitor their progress during a treatment process. 


One of the major design challenges was designing for a wide range of nose types. After making casts of an ethnically diverse range of 30+ participants, each individual's nose was quantified and charted. After looking at which parts of the nose had the least variability, it became apparent that the septum would be a good part of the nose to design around. 

The profiles of each nose were also studied. The section drawing of the final design was then overlaid on top of these profiles to see what angle accommodates the most nose profiles. The nose casts were also used as "manikins" throughout the prototyping process.


A variety of design ideas were explored (from left to right): 

01 | Unified form 

02 | Hinging bridge and tip

03 | Flexible bridge

04 | Adhesive strip 

05 | Soft flexible grip

06 | Flexible septum grip 

07 | Mouth guard

08 | Final option


The paper sensor uses a printed electrode that is sensitive to the humidity of exhaled breath. This technology was the stimulus for the overall design idea. 

The issue of undiagnosed Sleep Apnea is a major problem that can be addressed through the use of this technology. 

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