🧵 View Thread
🧵 Thread (158 tweets)
Grocery list includes3+ soda bottles of varying sizesElectrical TapeHot GlueTubesMERV 16 or equivalent air filterhttps://t.co/jcIa0YQr0XGoing to see if I can make a high air-flow wearable smoke mask.https://t.co/ngnpC2DigG
DIY Oxygen Generator and a DIY ventilator.YAShttps://t.co/mtouXukTtw
"Several years ago, it was uncommon for a person on a ventilator to live at home. It was thought that non-medical people did not have the skills necessary to operate this machine. Times have changed [...]"https://t.co/EAxUkKgrmCHow do I Ambu Bag?https://t.co/NfioUd2WqT
Ventilator Basics for Nursing StudentsPart 1https://t.co/nPgCqEpb8zPart 2https://t.co/wVyB21KTenLearned: long term ventilation has risk of diaphragm atrophy; may risk not having strength to breath on own. There is a protocol for that I need to find.
"This video provides an overview of acute/adult respiratory distress syndrome for nurses.I am Gail L Lupica with over 20 years of experience teaching nursing at the pre-licensure level."https://t.co/4NsbEmoK55https://t.co/vfX5UjpiSH
Learn you a lung system real good like.https://t.co/FIju5ttFG6
"I have often had to revisit the foundation principles of Mechanical Ventilation throughout my career, re-integrating the core theory and have often found I’ve been left to leaf through textbooks and search broadly for unfiltered content online. [...]"https://t.co/3tJKQd2i6A
(alternately, watch the videos directly: https://t.co/28FD4WUsVA )
"study from Nigeria [...] is an example of how CPAP development is likely to be successful in low-income countries when local clinicians and engineers work together to evolve and field-test the best equipment for their setting"https://t.co/CipNLAH4hP https://t.co/e4Q9YSYP2W
sci hypen hub dot tw slash 10.1080/20469047.2019.1598125 https://t.co/26d7wgQ04k
Going to bed so I can deal w/ stores safely and avoid contagion vectors. I'll be breaking self-isolation before caseload explodes, so I wanna keep my wits about me and avoid anxiously touching my face.TFW: low on toilet paper & don't have a "bum gun". 🤧https://t.co/QHSr8BCEeq
"Recipes that call for vodka or spirits should be avoided entirely, because you need a high proof liquor to get the right concentration of alcohol by volume."https://t.co/nGBWf7DUkrSo... if we evaporate the water out, we should be able to use vodka?https://t.co/X6Cfc9RbPH https://t.co/hwJuA3Kwck
"The average person isn’t an expert chemist, after all, and it’s very important to get these concentrations correct to ensure that the mixture is effective."https://t.co/JerbjOPQl8Ok, then. This is basic chemistry tho? https://t.co/KT5TiW18Ol
CDC recommends hand sanitizer as a backup method, suggesting soap and water as the main one.https://t.co/SGhU5VHFQJHere's a collection on how to make your own soap:https://t.co/I2nmuIONQQ
Soap is good, but so are backup systems to prevent spread when you don't have access to soap and water.https://t.co/sOjvWTUSCU
@s_curves But Nothing beats handwashing with soap. it literally washes the germs off after destablizing the cell wall's adhesion. Stuff like this would solve a lot of the problems in places were the bacterial resistant stuff is the worst https://t.co/nFLOBh9UI6
Please, wash your fucking hands. And if you must make your own hand sanitizer, learn about concentrations and dilution a bit before just YOLO'ing your own.https://t.co/17aBVsw1YB
Apparently there is a thread on /diy/ where they're sharing tips on how to DIY PAPRs.https://t.co/4rQnY83VUySome of these are good.
PAPR = Powered air-purifying respirator = run air thru a filter + use pressure to keep dust and stuff out of your mask.You need a high-static pressure to pull air thru to get +6CFM, so some fans won't work. Here's one using a heater fan, and one with a salvaged hair dryer fan. https://t.co/W24YlwatuR
Highly recommend verifying any advice from an anonymous image board using 3rd party sources. E.g. I looked up the 3M PARP specs to confirm that 6cfm thing was correct: https://t.co/MIzqqvEXBKAnd as others point out in thread, Ozone is dangerous, & UV light is also dangerous.
Still trying to get details, but this idea is fascinating:https://t.co/G0ghlGys3PThis is effectively acting the same way that certain powders destroy the shell of insects and desiccates them. May work extremely well against coronavirus's lipid shell + also fight off bacteria.
"To demonstrate the concept of virus deactivation system based on salt recrystallization, the middle layer of three-ply surgical mask, polypropylene (PP) microfiber filter, was coated with NaCl salt as an active virus negation unit"https://t.co/VlPwVEeCEx(h/t @MarkProffitt)
FYI, salt circles are actually a protection spell.If you imbue your mask with a solution and then let it recrystalize, it can kill encapsulated viruses.But don't forget the surfactant.https://t.co/M7lDJweEY4
As its a crystallization process, there may be a sweet spot where the salt is most effective. Still trying to figure out how much to concentrate the salt.Not sure if the surfactant type matters, but it says the material became hydrophyllic as a result.
Soaking some of those central air filters in a salt solution overnight ought to do the trick in a DIY mask situation. The hydrophobic thing is for the waterproof masks.In the situation that we have a severe pandemic and we need more hands to help, every little bit counts.
This church is located where I would be traveling to buy supplies for makeshift PARPs. Guess I'm not going out. I don't want to risk my mom.https://t.co/RxD69TVOCNhttps://t.co/cnTYDbrVK4
If shit gets bad, my mom said she'd be risking her self to help. So I am finding alternate sources to make a PARP or something similar.According to this, cigarette smoke is sub 3 micron. Can cigarette smoke be used to test mask effectiveness?https://t.co/Ulo05AF0sU https://t.co/wg8TFTrlkj
I think we can assume what we need to catch are airborn droplets of liquid. That is to say, sneezes and coughs from infected patients.CDC recommends N95s masks + eye protection if in close contact w/ infected individuals in healthcare setting. They're rated at 0.3 micron. So...
This study (note: on healthy people) seems to suggest a large degree of airborn droplets from a sneeze are >100μm, but with some people having a spray that hits around 20μm?https://t.co/hcnu0ttwtyStochastic processes of sneezing + stochastic process of filtering? Maddening. https://t.co/M02xxYHo5O
My head right now: wondering how one might get a lot of infected snot and a sensitive enough viscosity meter to see how runny noses and mucous viscosity impact aerosol spray sizes.https://t.co/ynf6wI9wsq
Apparently I have to know how to do math to figure that out."second formula gives an expression of the ratio of the drag force actually sensed by the ball falling in an infinite medium to that in the Stokes limit as a function of Reynolds number alone."https://t.co/do5e3mbClv
Loosely speaking, air flow is about surface area, this is why filters are folded IIRC. But filter effectiveness seems to be about thickness and material structure.So basically, virus droplet has to make it thru a gauntlet of fibers without hitting one / getting adhered.
But you lost me at "Lagrangian Modelling of Droplet Collisions in Spraying Systems"https://t.co/dIxQSrDjKpSo I assume a thicker filter = higher chance of stopping droplets.So, folding it in half to double it up should work just fine as long as it's big enough for airflow.
Does anyone know how to make a makeshift static pressure measuring device out of junk?CFM seems a bit more complicated ( https://t.co/C3pfaSZXBq ). But static pressure is just a fancy spring valve system, no? https://t.co/JZRYAGQ8Ow
TFW learning about how to measure the viscosity of my urine and blood is helping me macgyver a makeshift https://t.co/TmVafH0MHu mask. https://t.co/nhdbCnnnnq
I need a theme song that reminds me to stay calm.The memes, they do nothing.https://t.co/n8Pu89Y1Nd
Protip: if you are distilling 40% vodka to increase ABV to sufficient concentration so that you can make your own hand sanitizer, it is important that you do it safely. Alcohol is extremely flammable, and potentially explosive under pressure.https://t.co/tkA6WTJ2Dn
Any rubbing alcohol at 95%-99% ABV (alcohol concentration) is highly flammable. In fact all alcohol (including hand sanitizer) should be treated as a flammable and should be used safely. Burning is painful all the way up until the point you are dead.https://t.co/BaiPzcg7im
"research project run by the University of Edinburgh initially showed last September that NaCL (sodium chloride) inhibited all types of viruses. The prevention of viruses is caused by the chloride component of salt, not the sodium."https://t.co/0Q0vBb433x
"[salt] sodium chloride (NaCl). Replication of enveloped/non-enveloped, [...] RNA (respiratory syncytial virus, influenza A virus, human coronavirus 229E, coxsackievirus B3) viruses are inhibited in a dose-dependent manner."https://t.co/aXM2kbxhymhttps://t.co/WPG4HoLk63
So gargle iodized salt?"Formulations like [of povidone-iodine] antiseptic solution have demonstrated > 99.99% activity against both enveloped and non-enveloped viruses including Ebola, MERS, SARS coronavirus, influenza..."https://t.co/Gnr2oz1m8rhttps://t.co/ZlILgRP7lr
I'm thinking if we can use effective gargling in a medical settings we might be able to prevent build up in nasal/mouth/throat before it gets enough to enter lungs and overwhelm immune system? May also help prevent spread ala:https://t.co/PkNvy5lJQ3
"No. There is no evidence that regularly rinsing the nose with saline has protected people from infection with the new coronavirus."🤨 https://t.co/dZjuFMzhc2There is no evidence a preventative measure we haven't bothered to test at scale has effect?https://t.co/qBww1QbTRF
"[salt] sodium chloride (NaCl). Replication of enveloped/non-enveloped, [...] RNA (respiratory syncytial virus, influenza A virus, human coronavirus 229E, coxsackievirus B3) viruses are inhibited in a dose-dependent manner."https://t.co/aXM2kbxhymhttps://t.co/WPG4HoLk63
Here's a study on saline. ¯\_(ツ)_/¯"Our study has limitations. As a pilot with a primary outcome of establishing if a trial using HSNIG is viable, the study is not powered for efficacy end-points. We hence need a larger trial to confirm our findings."https://t.co/7XhpztCQfE
There is no evidence any preventative measure we haven't bothered to test at scale has any effective power. However there *is* evidence that salt water does have action against Coronavirus, and a low power clinical trial suggests it might work. *Myth*https://t.co/9N2AwQDDfE
Aphex Twin SCREAMING Scene, 10 hours.https://t.co/MWkyN2w2bd
How do we... Uh... Get access to a large numbe of potential cases to run a clinical trial on the use of salt water gargle as a partial preventative measure against contracting the common cold? You'd think cases would be hard to find...https://t.co/RsQ1HlIn15
fuck shit fuckhttps://t.co/kweXYV5ipu https://t.co/sd6q60iXfD
How to make your own mask since hospitals need them more than you.Its not ideal, but better than nothing. https://t.co/e9vQWkZOmKwith instructions on how to prep the fabric.https://t.co/Jfveg7fsq0https://t.co/DpG8x7P418 https://t.co/lyWYqAZMmV
As previously mentioned in this thread, coating masks in salt has been shown to help kill viruses and germs so they avoid becoming biohazards after extended use. Every bit helps.Here's a video of how to do it with N95 Masks.https://t.co/6g6TgZBa86https://t.co/vRVsZmughZ
"To demonstrate the concept of virus deactivation system based on salt recrystallization, the middle layer of three-ply surgical mask, polypropylene (PP) microfiber filter, was coated with NaCl salt as an active virus negation unit"https://t.co/VlPwVEeCEx(h/t @MarkProffitt)
If anyone has details on building makeshift functional ventilators, share them out if you can.It's amazing what a bunch of amateurs can accomplish when collaboration and stigmergy allows us to ratchet thru ideas.https://t.co/QCwWrRqcf9
Before someone comes at me with "No evidence"."Any type of general mask use is likely to decrease viral exposure and infection risk on a population level, in spite of imperfect fit and imperfect adherence, personal respirators providing most protection."https://t.co/CCQclAEtZB
I fucked up this thread, you can continue it here.https://t.co/ECiBzCyxxu
Coating masks in salt has been shown to help kill viruses and germs avoid'ing becoming biohazards after extended use. This can make masks last longer.Here's a video on the process.https://t.co/6g6TgZBa86That should work on a makeshift mask as well.https://t.co/vRVsZmughZ
Coating masks in salt has been shown to help kill viruses and germs avoid'ing becoming biohazards after extended use. This can make masks last longer.Here's a video on the process.https://t.co/6g6TgZBa86That should work on a makeshift mask as well.https://t.co/vRVsZmughZ
"To demonstrate the concept of virus deactivation system based on salt recrystallization, the middle layer of three-ply surgical mask, polypropylene (PP) microfiber filter, was coated with NaCl salt as an active virus negation unit"https://t.co/VlPwVEeCEx(h/t @MarkProffitt)
Don't forget to cover your eyes with something. I recommend swim goggles. Viruses can leak thru your tear ducts and get into your lungs that way.https://t.co/E1WbInjdWT
Repeating this tweet, since I fucked up the thread.https://t.co/5yZ7sOxO24
Before someone comes at me with "No evidence"."Any type of general mask use is likely to decrease viral exposure and infection risk on a population level, in spite of imperfect fit and imperfect adherence, personal respirators providing most protection."https://t.co/CCQclAEtZB
Do you ever go reading about how they simulate aerosol spray, take one look at the device and have a mental breakdown when you realize the model doesn't capture the dynamics of a functional mouth and mucus system.https://t.co/78boIP3l2LNow you can!https://t.co/oomQE1nDdy
Is 6 foot rule based on outdated models?"That’s right: A novel study by MIT researchers shows that coughs and sneezes have associated gas clouds that keep their potentially infectious droplets aloft over much greater distances than previously realized."https://t.co/BF7btSwufR
That link is to this google doc (in case you're sketched out by clicking on random URLS that might be malware)https://t.co/t56njM5xVE🤓https://t.co/yiXntINoEW
I like this guy. He does a good job explaining things.https://t.co/2UWAVZU6gR
Infection spreads by droplets in the air.dont_breath_this.jpghttps://t.co/mHpWsTxPlA
I argued with a literal rocket engineer (with patents) on the potential explosion and fire risk of heating H2O2 to act as an antiseptic; This was less than a week ago.What if the experts are wrong?https://t.co/4bHlYe2JDN
Anything you tweet can and will be used to report you. There is no court of law. You have the no right to have an attorney present; this is a private platform. Your tweet will be reviewed by someone who's metrics govern their livelyhood. You will be banned. You have no recourse.
I worked in a nursing home as a floor care attendant (janitor) back in 2006ish. This was during a massive wave of Norovirus infections.People died. Many healthcare professionals don't know how to wear masks properly, and they spread misinformation about mask wearing too.
I was given a reprimand for not coming in to work when I contracted Norovirus. I was disgusted.Shortly after, residents (patients) I cared about died.People I made friends.That was the moment I realized I hated the healthcare system. Seething.https://t.co/641echvDrY
I think of people dying.https://t.co/fOdOJYvlb0
"It does not surprise me in the slightest that we see medical professionals that are under prepared and struggling with this thing, particularly in nursing homes. My heart goes out to them.I hope this changes."https://t.co/641echvDrY
To deal with this, I project myself into the future.They are already dead. We are healing. We are making changes that matter.Maybe we'll take the flu seriously. Maybe we'll not overwork the staff & force them to work crazy hours.Maybe we'll start to take care of each other.
“But the other ants start cleaning the infected ant even before it has become ill and before the fungus has grown into the body. We believe it’s this early discovery of a disease that is decisive in preventing it from spreading through the nest,”https://t.co/XP8YRQPB6k
This guy is brilliant and is funded via patreon - so he doesn't get advertisments $$$. He's doing this entirely because he knows his audience can help refine this. He's a trash talking Canadian with some experience with air systems and hydraulics. https://t.co/Tp7Z5ljuwY
He's already on to a MK.IIhttps://t.co/rb97R1Aslx
"The results of the present study, as well as the application of the model to related influenza scenarios, are potentially useful to public health officials in decisions involving resource allocation or education strategies."https://t.co/N2fjWPE3uEhttps://t.co/Ha3rky6o7C https://t.co/br5ja74hNJ
"In a California study of tuberculosis precautions, 65% of health care workers used their respirators incorrectly. That’s little better than the general public, who have a 76% failure rate."https://t.co/JFehQzyYa7 😂🤣😱😭☠️
8x ~7inch squares as a mesh in a varying grain pattern, and an outer layer.https://t.co/nDG2wSs5QZ https://t.co/oExIxUjnQb
I intentionally cut my favorite shirt - orange - so people would see me & start a conversation on wearing masks - or stay well the fuck away.Behavioral distancing is a learned adaptation.Become a leader, look like a fool today.<<dancing intensifies>>https://t.co/MxQHtQH6Af
Seriously people- STOP BUYING MASKS! make your own ;phttps://t.co/8EBxwW7xHI
Worth noting that applying a salt layer to the mask changes the surface from hydrophobic to hydrophillic. This article talks about how normal masks should be sterilized with respect to their electrostatic nature, with some possible implications.https://t.co/uXHZJGyX5j
If you are a non serious manufacturer and need to spin a fibrous material after melting it thru a 3d printer's head on the cheap, consider this fantastically dangerous do it yourself option: https://t.co/ARsl2SiDv4 https://t.co/3xZ5mWirfZ
I just realized that the robotic vacuum I bought to help me clean (when I can't get out of bed) also has one of these filters in in it. And when it's running at 100% power, seems to do more than 6cfm.Could actually build the PAPR in a cave.https://t.co/cH2dFOIWQs
PAPR = Powered air-purifying respirator = run air thru a filter + use pressure to keep dust and stuff out of your mask.You need a high-static pressure to pull air thru to get +6CFM, so some fans won't work. Here's one using a heater fan, and one with a salvaged hair dryer fan. https://t.co/W24YlwatuR
"testing it without a CO2 sensor is also a good way to kill yourself." 👀https://t.co/GChrthiJhj
Suffocating is painful all the way up until the point you are dead.Stay safe folx.https://t.co/Bjruhog2GF
Any rubbing alcohol at 95%-99% ABV (alcohol concentration) is highly flammable. In fact all alcohol (including hand sanitizer) should be treated as a flammable and should be used safely. Burning is painful all the way up until the point you are dead.https://t.co/BaiPzcg7im
Please note: like the one-way valves on some N95 masks, if you are using a PAPR without an external filter, you are potentially breathing your infectiousness on other people at +6cfm.This is not polite.https://t.co/GUg9ddlJ90
Has anybody tested white wine vinegar against SARS-CoV2?A study in 2004 tested a concentration of 6% against SARS-CoV, another strain with similar lipid membrane. It got close to isopropl, with ≥3.0log10 in 60 seconds.DOI:10.1007/s00430-004-0219-0 (PMID: 15118911) https://t.co/pCEDMvXXGR
My standard cleaning vinegar (made from corn, lol) is ~5%.Seems there are ways to concentrate it by progressively freezing at higher & higher temps +remove water crystals."Fractional Freezing" (apparently works on beer too!)https://t.co/kpp7xN52suhttps://t.co/WHlSHlnXFN
I don't understand why no one has tried to replicate that study for the current strains? That would fast track it to being put on the EPA's website, which seems to be what many people are referencing.All I see are a bunch of 'experts' all hemming & hawing without evidence.
"The ancient alchemists used to do this work in the coldest parts of winter."https://t.co/e2V8RgTJqf
I prefer "like farts" b/c people are familiar w/ avoiding them. But alas, back in April someone compared fart smell ( 0.0004 micron ) with viral size (0.06-0.14 micron) and completely neglected that spread is via droplets measured typically 0.1-900 micron. https://t.co/XgknxQCDcX
viral particle size from https://t.co/gIWODaDEv5cough particle size of healthy people fromhttps://t.co/zIgKASNom7Fart smell is based on methanethiol as a gas.
Back in march I couldn't find studies on coughing sick people at the time, much less covid associated mucus, the studies all seem to be on healthy people coughing.This looks like it might be comprehensive on that topic and includes a review on covid.https://t.co/FmGCPc6c57 https://t.co/Mpu4DYKuMw
That study seems to match other things I found back in April.https://t.co/PWWtYn8qrF
What a fucking mess this whole aerosol business is.https://t.co/uBRzUJGMXc https://t.co/JrYyTkqYHk
Ok, so the issue seems to be how people define air bourn transmission? This seems to align with the notion from that it depends on how well the virus can survive in droplets and avoid desiccation.https://t.co/pad9VFtar7 https://t.co/LKm1z86QxV
That CDC article does seem to confirm that situations with poor ventilation and long duration can be problematic (tho not "effective air bourn transmission" per their definition). So that paper on people getting infected on a bus seems plausible.
Moral of the story, don't smell farts.https://t.co/Yns8zKUN6v
If destruction of virus lipid boundary is due to UV inducing heat energy to vibrate apart. As perhaps one method of actions for particle size to matter (larger particle, higher thermal mass to warm)... Does winter's low UV + cold mean it travels farther?https://t.co/i3lyWNwk5s
"spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness"https://t.co/LQRFGGYqcrTL;DR: 6 feet considered harmful.https://t.co/g9JPf847ri
Whelp."These findings demonstrate SARS-CoV-2 can remain infectious for significantly longer time periods than generally considered possible."https://t.co/w9K53ZAz57 https://t.co/qUJXQo0WwW
It seems I was right. Does that mean my mental model of 77 days still holds? I should check if we've updated how long someone can spread it if asymptomatic. https://t.co/qUhRCFvtBl
"But all of the experts we spoke with say that disinfecting and hand-washing every last item in your grocery haul is really not necessary. You might find it comforting to know that none of these experts are doing this themselves."https://t.co/X7k2P0AitHFucking experts.
Did they consider temperature of product and the type of packing material it was in? A plastic wrapped veggie in a cold section might have virus on the package upwards of a month. Possibly longer since study only on 20*c, not the typical refrigeration temperatures used in stores.
how did NPR go from "disinfecting and hand-washing every last item in your grocery haul is really not necessary." to "you don't need to disinfect your groceries"?Surely the experts are disinfecting surfaces that are known carriers of fomites?
Nature editorial goes ¯\_(ツ)_/¯"Now that it is agreed that the virus transmits through the air, in both large and small droplets" https://t.co/ahF4pjL0vh
And another goes ¯\_(ツ)_/¯ within the same 24 hour period."specialists can’t rule out the possibility of fomite transmission, and the guidance from many health agencies about how to deal with surfaces has been unclear"https://t.co/pSb40F8MP1
What if... And just hear me out... What if the virus doesn't spread often from fomites because we're washing things?Also, why is there no author information on page? I wanna read up other stuff they wrote to see if they're a dipshit like this all time.https://t.co/h2AFFCXk3l https://t.co/M2gmlb1xbw
I've been looking for this kind of data myself to better protect my family.https://t.co/CA74HOMMBthttps://t.co/n2UPqR2wHa https://t.co/1bhk4G6Vfa
I've known about it for a long long time.https://t.co/HpBMYWnIi9
@CTZN5 @balajis There's already a bit of a movement toward detecting antibiotics/antidepressants in municipal water supplies - mostly for the purposes of extracting it before it hits water ways.https://t.co/yGiWN56ZoK*insert joke in idiocracy about how it's gross we're using toilet water*