Recent comments in /f/explainlikeimfive

gogogadgetrage t1_jdziz4c wrote

But let's also be honest. The health care providers are very frequently also for profit entities. Even if the institutions may be non profit they pay some very lucrative salaries to individuals who may be compensated for doing expensive procedures. The doctors are just as likely to be overly aggressive in their use of expensive procedures because that's how they get paid. In that sense there is some control needed.

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haspfoot t1_jdzin4y wrote

But ideally, the system would deal with the pathway/guideline issue on a provider level and eventually drop Doctors/facilities from their network if they have a demonstrable track record of inappropriate clinical practices. Not shift the burden upon the individual. In particular, not drop it on the individual after service has been provided.

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jamesgelliott t1_jdzhuma wrote

Point #2 isn't correct. Even non-profit companies like Blue Cross and the various healthcare coops engage in cost containment measures.

Why pay $1000 for a newer more expensive treatment when a $100 proven treatment will work.

There are things called clinical pathways that are guidelines that start with least expensive yet generally effective treatments first.

It's why you have to get an inexpensive X-Ray before the MD can order a more expensive CT scan.

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zorecknor t1_jdzgxfq wrote

This is the right answer. In most of the countries I know off Insurance must cover everything the doctor say unless they can prove it is not in the coverage (always check your coverage before taking insurance). They still fight tooth and nail not to pay, but it is easier to push back and get paid.

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Gnonthgol t1_jdz8yqg wrote

When a doctor approves a treatment that just means you are allowed to have that treatment. It does not mean that you need the treatment or that you want the treatment, just that it would not do you much harm. It is up to you to decide if you want the treatment, you might deny it for any number of reasons including the cost. The insurance company can deny to pay a treatment even though it is approved by a doctor claiming that you do not need the treatment or that other more suited treatments are available to you.

For example if you brake your arm your doctor might give you the option of putting it in a cast for two months to let it heal itself or to have a surgery which will make the arm usable in a couple of days. He might approve both treatments and leave it up to you to decide. He might recomend you have the surgery but that is just his oppinion. There are of course more complications with a surgery and the cost is of course higher. The arm is also not going to be the same after a surgery as there will be implants left behind. So you are free to chose whatever treatment you want. An insurance company might say they only cover the cast and not the surgery as their contract only say they cover the cheapest option. However other contracts say they cover the fastest option within reason so they would cover the surgery.

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rubseb t1_jdz4py7 wrote

Mainly because the lid reduces evaporation. Water evaporates all the time, not just when it's at boiling temperature. Or rather, it evaporates if the air is able to accept more water vapor. Air that is already very humid can't accept much more water. At 100% air humidity, no (net) evaporation takes place.

Okay, so why is this important to how fast water boils? Well, when water evaporates, it steals a lot of heat from its surroundings. That's how sweating cools down your body: the sweat evaporates off your skin and cools it. So, if you're trying to heat up a pot of water, evaporation is your enemy.

If you leave the pot uncovered, evaporation can happen freely as humid air above the pot is replaced by drier air. But if you cover the pot, now air gets replaced much more slowly (it will still get replaced a little). Water will evaporate into the air above it, but this air will quickly reach 100% humidity and then no longer be able to accept any more water vapor. This doesn't mean that evaporation halts completely, but rather an equilibrium is reached where some new water evaporates, but an equal amount of existing water vapor condenses against the walls and (especially) the lid of the pot. When water vapor condenses, the energy it "stole" before to evaporate is returned to the area where the condensation occurs. So, if you can get the vapor to condense inside the pot, then the heat stays inside the pot.

A smaller effect is that the lid also traps heat. Air above the water heats up, and if the pot is uncovered, this hot air is replaced by cooler air, which cools down (or slows down the heating of) the pot and the water. Trapping the hot air above the water means you again lose less heat, but the reduced evaporation will always be the larger effect.

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phiwong t1_jdz24rl wrote

Inhaling high temperature steam through the nose is NOT safe. It will likely result in scalding and damage.

At room temperature (20C), water vapor becomes saturated in air at around 2.3%. So in any sort of "normal" situation, even if the air contains a lot of water vapor, it is relatively low percentage and you can continue to breathe fairly normally with no issues as it will still be mostly normal air.

You cannot breathe liquid water because human lungs are not designed to extract dissolved oxygen from water. And of course, liquid water replaces the atmosphere which has the oxygen that the human body requires to survive. If you do end up breathing liquid water, this will eventually result in drowning.

Having said that, at elevated but still survivable temperatures (around 50C+), breathing air saturated with water is dangerous. Because the lungs operate at around 38C, water will condense out of the air and eventually fill the lungs. This will eventually result in drowning but slower (maybe a few hours). This situation can occur in certain caves (like the caves in Naica, Mexico also known as the Crystal Caves)

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