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| Building a DIY defibrillator in an emergency, |
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| SilverSolder:
--- Quote from: Wallace Gasiewicz on April 26, 2020, 10:42:45 pm ---[...] the CPR gurus found out that just pumping the chest circulates enough air. Not too fast, about 60 Hz, faster in children. [...] --- End quote --- 60 times per second? - typo? |
| SiliconWizard:
--- Quote from: SilverSolder on April 27, 2020, 02:41:07 pm --- --- Quote from: Wallace Gasiewicz on April 26, 2020, 10:42:45 pm ---[...] the CPR gurus found out that just pumping the chest circulates enough air. Not too fast, about 60 Hz, faster in children. [...] --- End quote --- 60 times per second? - typo? --- End quote --- Surely that's more like 60 per minute. Otherwise - not only are they talking about McGyver defibrillators here, but CPR at 60 Hz, maybe you'd do that with some big vibrator directly connected to mains. :-DD |
| Wallace Gasiewicz:
Yea one Hz, sorry. Yea vibrating... thanks for correcting me.. but this brings up another strange memory. At one time there were respirators proposed that worked at vibrating frequencies, these, as far as I know, were for use in NICUs. I do not think that any of them were actually made for use but there were studies on animals. Supposedly they were for use in NICUs and were less apt to cause ventilator related lung damage. Supposedly "vibrated" the air in the lungs to mix incoming air with air in aveoli. |
| SilverSolder:
Interesting idea (vibrating the air in the lungs) - maybe it promotes the interchange of gases between the blood and the air, making better use of whatever air is there? |
| Psi:
--- Quote from: Wallace Gasiewicz on April 26, 2020, 10:42:45 pm ---Having performed thousands of CPRs on patients, I can tell you that if you do not have a shock available within maybe 15-30 min. It is futile. ... 200 Joules is about 500 Volts charged into 2000 uF caps. ... If nothing else was available I would charge up some big capacitors and connect them across the chest. Whatever you have. MacGiver it. Maybe 400-1000 volts. At this point it cannot hurt --- End quote --- Thanks! Some good info there, Especially interesting that you only have 30min or so to get any DIY solution implemented. 2000uF at 500V is rather large and might make it unfeasible right there, that's not going to be easy to find in random household devices. Anyone got ideas on how to build a 2000uF cap using commonly available devices? Even 1000uF would be hard |
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