I use hands-free stenomasks for extended periods of time. How healthy are they?

I am mostly worried about the quality of the air I inhale, and I would like to know the effect on the skin to have something firmly pressed on it for extended periods of time (> 8 hours a day).

I have one stenomask that covers my mouth, And a second one that covers my nose and mouth. My stenomasks' model is Talk Technologies Sylencer SM 200.

  • 1
    Literally nowhere online has "dangers of stenomask".
    – Tim
    Commented Apr 5, 2015 at 14:21
  • @TomMedley I am mostly worried about the quality of the air I inhale, and the effect on the skin to have something firmly pressed on it for extended periods of time (> 8 hours a day). Commented Apr 7, 2015 at 13:50
  • @FranckDernoncourt Could you please edit your question above to include this detail that you've mentioned?
    – Dave Liu
    Commented Apr 17, 2015 at 20:02
  • 1
    @DaveL done~~~~ Commented Apr 21, 2015 at 1:57

1 Answer 1


With the COVID-19 pandemic some new attention has come to mask wearing pressure injuries. On a very general level, pressure injuries happen mostly to immobilized patients or those with sensitive skin, such as early borns or babies.

That said and as an aside there is the NPIAP which is a society exclusively concerned with pressure induced injuries: https://npiap.com/

I couldn't find any specific information the referred mask model, however, here are some general guidelines issued by the NPIAP to prevent pressure injuries. They include

  • relieve pressure when possible
  • reduce pressure intensity when possible
  • avoid moist (softened) skin
  • avoid friction

Pressure is defined by force exerted on an area, therefore it may also be a good idea to increase the area therefore reducing the force applied to the area.

For COVID-19 there is also a position paper on N95 masks: https://cdn.ymaws.com/npiap.com/resource/resmgr/position_statements/Mask_Position_Paper_FINAL_fo.pdf

There is some more information on prevention and some general information on therapy for pressure injuries here: https://www.uofmhealth.org/health-library/abp5591 These are not specific to masks and involve recommendations such as rotation the places where pressures is applied; this is mostly applicable to immobilized patients. For these patients rotation of their bodies so that the body weight pressured is applied to different regions of the body can be beneficial. A takeaway may be to try applying pressure to different areas of the face, such as using different models of masks over time. A strategy with stenomasks may be to have at least two different models so that they can be worn alternately.

As for the quality of air: I assume the air surrounding you when wearing the masks is relatively clean and breathable to begin with (otherwise a different kind of mask may be necessary). As far as depletion of oxygen and enrichment with carbon-dioxide goes, I assume that the stenomask will have to have passed some testing that will prevent CO2-intoxication when used for prolonged time. There may be some information on this in the masks' manual. If someone has a link to that, feel free to post it in the comments.

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