Simon Mitchell - Deadly states [Hypoxia, Hypercapnia]: can we learn to recognise them?

[Underwater Tourist]

 

[34109411]

i watch very good from him as usual

 

[L13]

I was disappointed that he didn't show the stats for the control test subjects (how many false positives in each group that WASN'T exposed to hypercampina/hypoxia). Depending on the results in those sub-groups, the findings may be less robust than they appear from the top line numbers. Also of interest would have been the distribution of levels that each group bailed out at and whether or not individuals self rescued when alerted by the HUD in each group (training may or may not have improved effective response rate to the HUD warning).

But, the design of the experiment seems very robust! We are fortunate to have people in our community actively pursuing answers to these questions. Thank you @Dr Simon Mitchell !

Ideally they would release a comprehensive set of the data gathered so others can help evaluate the results.

 

[crewiscool]

I wonder if he had the participations wear pulse oximeters during their hypercapnia training or testing. There is some evidence that these devices can not only give an early warning for Hypoxia but also Hypercapnia. Given the low cost of these sensors if they can alert to both of these risk factors they could be a really good addition to a rebreathers sensor array.

It would be really interesting to see if the "hospital room" studies could be extrapolated to the diving environment.

 

[Mobulai]

wonder if he had the participations wear pulse oximeters

I believe it was (casually) mentioned by the good Dr in his presentation, I can’t speak for the experiment design

since you brought it up, this is an intresting read ()that I am still going thru): https://link.springer.com/content/pdf/10.1007/s10439-022-02919-y.pdf