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| Building a DIY defibrillator in an emergency, |
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| Wallace Gasiewicz:
Just an oscilloscope does not work. We need to get rid of the RF and especially 60Hz interference we have today. You need a front end that will get rid of the common mode problems and amplify the ECG signal at the same time.There are DIY pretty simple units that do this. Even Google thinks so. But you need something else besides a scope. Also the ECG lead connections are important to minimize any galvanic effects on the skin. , while making good connections. Silver plated leads were used when I first did an ECG along with special conductive paste, now the disposable leads contain the silver and the conductive paste (gel) By the way EKG is the German of ECG. https://www.nutsvolts.com/magazine/article/February2017_Build-ECG-EKG-Unit |
| Psi:
yeah, using an oscilloscope to look at your heartbeat isn't as easy as it seems like it should be. I've tried. |
| AVGresponding:
By the time you've built your ad hoc defib it'll be too late to be of any use. Far better to use a website like this https://www.defibfinder.uk/, or download an app to your smartphone. |
| janoc:
--- Quote from: AVGresponding on September 27, 2023, 05:00:03 pm ---By the time you've built your ad hoc defib it'll be too late to be of any use. Far better to use a website like this https://www.defibfinder.uk/, or download an app to your smartphone. --- End quote --- An even better idea is to learn how to administer CPR and actually perform it, while having someone call the emergency services. Thinking about building anything or searching for a defibrillator on a phone when you have a victim on the floor in cardiac arrest is ... bonkers? We are talking about minutes that person will survive without immediate help, tops. CPR might not save them either - but if you spend that time looking for gadgets and/or McGyvering something instead of working their chest, they will die for sure. Something I was taught by an ER doctor - don't worry about breaking ribs or catching something because of mouth-to-mouth breathing. Both will heal but nobody can cure death. The goal is to keep the victim alive while help arrives. Also nobody can successfully sue you for breaking their ribs (or causing other injury) while you were saving their life. OTOH, in many places you can be criminally prosecuted for not helping despite being able to. |
| Psi:
--- Quote from: janoc on September 27, 2023, 07:19:06 pm ---Thinking about building anything or searching for a defibrillator on a phone when you have a victim on the floor in cardiac arrest is ... bonkers? We are talking about minutes that person will survive without immediate help, tops. CPR might not save them either - but if you spend that time looking for gadgets and/or McGyvering something instead of working their chest, they will die for sure. Something I was taught by an ER doctor - don't worry about breaking ribs or catching something because of mouth-to-mouth breathing. Both will heal but nobody can cure death. The goal is to keep the victim alive while help arrives. Also nobody can successfully sue you for breaking their ribs (or causing other injury) while you were saving their life. OTOH, in many places you can be criminally prosecuted for not helping despite being able to. --- End quote --- You're forgetting the original scenario in this thread. There's another person able to give CPR, there's no hope of getting any help within 12 hours due to your location. So you might as well try and build something to shock the person. You don't have much time, maybe 20-30min, but that might be long enough to smash apart some devices and add extra caps onto one of them to make 325V DC with some energy behind it. (probably only going to work in 230VAC countries, 110VAC would need voltage doublers and that is getting to complicated) Even if both of you are fully trained in CPR, you still need the defibrillator within the 20-30 min |
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