goodells
Joined 12 years ago
Joined 12 years ago
The main determinant of successful CPR is maintaining coronary perfusion pressure with unrelenting chest compressions so that the heart has a fighting chance at starting to beat normally again. Moving the blood so that it has enough pressure at the aorta where the coronaries branch off of is way way way more important than keeping it oxygenated, which we're already pretty good at. In fact, over-oxygenation in CPR has been shown to be detrimental to outcomes because it causes oxidative stress at the cellular level. Oxygen is nasty, it's amazing that life evolved to harness it.
I do agree that modern medicine (especially emergency medicine) is really cool, that's why I switched careers after working in software engineering. We have lots of tools at our disposal, it's already science fiction. Modern resuscitation involves drugs that manipulate the ion channels of the heart in various ways, we can shift fluids around by changing the osmolarity of IV fluids (and we can pump them into you through your bones after drilling into them if needed...), cardiac monitors and AEDs will time a shock just right depending on the dysrhythmia to increase the odds of success, we can even just repeatedly shock a heart to make it beat in some situations like an AV block. And that's just the stuff that they let paramedics do (i.e. trained monkeys, I am one).
In an acute situation where oxygenation isn't sufficient, the imminent threat of anoxic brain injury and end-organ dysfunction is the concern. Measures would obviously be taken to correct that, up to and including rapidly sedating and paralyzing a patient in order to mechanically ventilate them with an increased fraction of inhaled oxygen and/or additional pressure (PEEP) to increase the surface area in the alveoli available for gas exchange.
Respiratory acidosis (i.e. the accumulation of CO2 and acidification of the blood due to inadequate breathing) is generally not harmful on its own, the concern there is just adequate oxygenation. However there are metabolic causes of acidosis, usually due to lactic acid accumulation, which lead to end-organ dysfunction because lots of enzymatic reactions in the body expect a very narrow pH range to work effectively. This occurs over a period of days, though.
The only downside hardware-wise is I don't get any indoor IR night vision with these, which some of the nicer "smart home" account-locked ones do.
It's honestly not too bad to set up if you run [1] and [2] in Docker. I've done disaster recovery scenarios of my home infra where I straight up disconnect the modem's uplink and everything works without any issues.
They do tend to be… rougher… apparently they do _such good_ CPR that the risk of damaging the great vessels is much higher than with manual CPR, but I think the tradeoff of getting consistent chest compression quality works out in favor of it still.
There’s a saying in EMS: “lift with your firefighter, not with your back!”. My heart goes out to any firefighters named Lucas.
<rant>
It's also quite annoying sometimes that some things _need_ to be in us-east-1, and if e.g. you are using Terraform and specify a different default region, AWS will happily let you create useless resources in regions that aren't us-east-1 that then mysteriously break stuff because they aren't in this one blessed region. AWS Certificate Manager (ACM) certificates are like this, I believe.
</rant>
- "The Mote in God's Eye" by Jerry Pournelle and Larry Niven (1974)
- "A Fire Upon The Deep" by Vernor Vinge (1992)
[1] - https://en.wikipedia.org/wiki/Necessary_and_Proper_Clause
[2] - https://en.wikipedia.org/wiki/Commerce_Clause (technically an enumerated power, but the broadest and vaguest one by far)
- Shortage of dedicated special education teachers
- Parents who won't discipline kids at home
- Top-down pushes from administration such as "restorative justice", "least restrictive environment", and a few other phrases that will make any classroom teacher's skin crawl
- Unwillingness from administration to apply suspensions or expulsion due to how this ties to school funding
- Lack of flexibility in the teaching job market due to teachers being a licensed profession and most states suspending a teacher's license if they quit mid-year, leaving apathetic teachers trapped in bad schools
- Attempts to discipline non-white students frequently resulting in accusations of racism, making it not worth the trouble
In the classroom, the end result seems to be that behavior meltdowns take up a disproportionate amount of a teacher's attention and they aren't empowered to deal with it, all at the expense of the quality of instruction for the rest of the students. The standardized test score metrics discussed here are a not too surprising consequence.