CPAP Autopsy. The Anatomy of a CPAP Machine. What is inside a CPAP Machine? 

Board is $15 in quantity

@@Blue.star1 Hi, could you be so kind to give me advice where to order and by parts for Remstrar pro C- Flex Cpap machine? Kind regards, Marin.

Hi, Would you be so kind to give me instraction where to order and by a parts for Remstar pro C-Flex Cpap machine? Kind regards, Marin.

@@marinmilosevic7708 I estimated the approximate cost . Search online for parts

Hey there! Yes, that's what I meant by pneumotach. That's what we use to get our flow readings in the lab when CPAP is on. It's pretty cool. What is impressive to me is how it alters the flow rate to compensate for inhalation/exhalation and keep the pressure as stable as possible. The missing component that makes me chuckle when someone says they'll just hook themselves up to an air compressor. Nothing makes me chuckle like and exploding lung. LULZ ;^)

Can't decide if I should use a leaf blower or a shopvac to build one :)

You may probably hear to pump motor spinning up and down for every breath (5 seconds or so). Is it how cpap devices work? (I've never seen/heard one)

Pretty simple device. Need the following: 1. Variable speed blower. 2. Pressure sensor. 3. Controller. For a CPAP, just vary the motor speed so that the pressure is at the desired level. Need more pressure? Speed up motor. Need less pressure? Slow down motor. If you want to be more advanced and have a BiPAP, you need to monitor the pressure a bit closer and realize what happens when someone is breathing. During the inhale, you want the higher pressure. And during the inhale, the air goes out through the vent in the mask, and into the patients lungs. When the lungs are full, the air has only the mask vent to exit, so the pressure rises above the set point. And when the patient exhales, the pressure also rises. So when the pressure rises above the set point, the patient is about to exhale, so you drop the pressure to the lower set point and have the patient exhale. And once the lungs are empty and the patient starts to inhale, the pressure will drop below the set point, so you then ramp up the speed again, to get the pressure back to the upper set point. Rinse, lather, repeat. An Arduino ought to have more than sufficient processing power to handle everything needed. The blower does need to be properly sized for the task. I'd say you want a maximum static pressure of about 10" (25 cm) of water. Don't want more than that so that if something goes wrong, you don't blow someone's lungs out. And your maximum flow rate Should be on the order of only 3 to 5 cubic feet (or 100 to 150 liters) of air per minute. Basically, you need to have enough capacity to do the job and not so much capacity that you'll injure someone if the controls fail and the blower goes full power while the person is sleeping.

fletcher3913 Come on!!!!! Take it apart and lets take a look-see. :^) Taking things apart is becoming a problem. My lawnmower was acting up, so out came the toolbox....

***** HA!!! I have a giant blade in my hand and you're checking out my teeth!?!? Sugar is great. Especially in Dr. Pepper!

Hi John, please answer me where to order and by parts for this Cpap C-Flex machine. Thanks Marin.

I say "go for it" anyway. It's therapeutic.

😂

Angela if you are not capable to fix them , I would like to by them. Older Cpap C-Flex Remstar pro machine are much bether then new one. Thanks Marin

@@marinmilosevic7708 I gave them away already. after i posted this

@@angelamaxwell59 Thanks Angela Marin

I'd like to cut into some more. I did recently take apart and fix a MIP robot. That was fun, but not nearly as fun as the CPAP machine.

I have a broken down System One. Maybe I'll crack that baby open soon. I do have some M-60's laying around. If that's not good enough I can seal up the humidifier with some dry ice and water. ;^)

That will do the job, but it won't last. An air mattress pump will have a brushed motor. Not only will the brushes not last very many months (weeks?) running 8 hours a night, but they will be producing carbon dust, some of which will end up in the airflow. The mattress pump will also have nylon or bronze plain bearings which also have limited life. You could use the blower part if you you could fit a brushless motor with ball bearings. The model airplane market has brought the price of these, and the needed speed control down to a very reasonable level.

Scott Allen :^) It's just fun. Usually takes the mystery out of things. Just like the way homes are built....just a big facade! Like seeing the Wizard of Oz behind the curtain.

You would probably be removing the components that make the fan alter the pressure. It increases and decreases with inhalation and exhalation to keep the pressure constant in the mask/upper airway. You can get a manometer to measure the pressure though and find out for sure.

The fan motor looks like a three phase brushless motor. The three components by themselves at the fan end of the control board are the driver transistors for it. The controller regulates the speed by varying the frequency of those drive signals. It looks like the fan motor also has position sensors (likely Hall effect sensors) so it will know the fan position and can provide properly synchronized drive signals. Just hooking it to a power supply wouldn't operate the fan, you need a BLDC motor driver of some sort (in the radio controlled model worlds, these are known as "ESC" for Electronic Speed Controller, but those are designed for much higher speeds than that fan could withstand).

Hi, I'm a sleep tech (RPSGT). I'm not sure exactly what would happen with that...I'm not an electrician... BUT the min pressure of a CPAP machine is 4 and the max pressure is around 25. So I would not recommend simply having the fan blow. There is risk of "blowing your lungs out" (I don't think that would really happen, it's just something I've heard said). You wouldn't be at the actual pressure you would need and it would probably not be comfortable at all. There is the risk of putting extra air in your belly which ends up causing excess gas and being uncomfortable. I realize this is 3 years after this comment was made, but I'm posting just incase anyone else comes across it and thinks it would be a good idea. I would say no. Sorry.

I hear a lot of people say this, but I don't see anyone actually doing it. I believe that it would be much harder for a DIYer to do it than one would think.

Yup you could do it for about 100 bucks in surplus parts and an adurino or rasberry pi. The hardest part to get would be the brushless ultrahigh velocity fan believe it or not.

I am working on a project that requires brushless motors and they're not hard to get at all. Robotics is big and lots of makers require these motors for their projects. Their are a lot of companies that make all shapes and sizes and the controllers for these types of motors are widely available and even open-sourced. Why is no one jumping on this, I don't know, I suspect people don't know, don't care or the market is cornered by big companies. It was shocking to see how small the military versions are.

Not every driver. Only those with sleep apnea.

The brain won't be starved for oxygen, resulting in drowsiness. Been there for 20 years until I heard the word apnea.

hallecats First one was 1980. Dr. Sullivan from Australia invented it. The ResMed S9's "S" stands for Sullivan.

I’m 64 and remember my aunt having one in the 80’s. It was huge, probably weighed 15 lbs and sounded like a manufacturing factory. Don’t know how she slept with the racket it made. Now I have one and I can’t even hear it run.

Ah, Alex boy! Awake at last, yes? I met your mother on the way to work, yes? She gave me the key. She said something about a pain somewhere, hence not at school, yes?

Make a video of this. TONS of people would love to see this.

I suspect that a lot of the high cost of this sort of thing is that it's medical equipment, which comes with excessive liability issues. I wonder what insurance premiums look like for these manufacturers.

That's like saying, "how can you teach someone how to cook without knowing how to build an oven." Sounds stupid doesn't it. Now read what you wrote again......I accept your apology.

TheLankyLefty27 woooow I was simply asking a question. No need to be an asshole about it....

"Simple" question.....man....that was a bad apology. I still accept it though. Thanks for watching!!!

TheLankyLefty27 nope, no apology. Your tact is undeserving of an apology since I never created a situation that needs one.

TheLankyLefty27 people that fish for, or expect apologies, don't deserve them.

Correct, I've never been in a movie, so it would really be difficult to call myself a "star".....which is why I don't. What I did keep in frame was your mother. No...not a FAIL. You watched it! SUCCESS!!!! Thanks for the view! Jesus loves you.