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new hoseless cpap promised
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sleepybeaver Offline

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Post: #51
RE: new hoseless cpap promised
(06-09-2015 08:30 PM)WSHenry Wrote:  Folks,

Here's the science behind the proposal:

https://www.youtube.com/watch?v=RXJKdh1KZ0w

Yes, I'm a pessimist.

Wow that video was impressive.....kinda makes me feel good all over....of course I am on prescription drugs mixed with alcohol.

It's exactly like that. . . . only totally different. . . . Sleep-well
06-09-2015 09:43 PM
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krelvin Offline

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Post: #52
RE: new hoseless cpap promised
I was impressed an I am not using drugs or alcohol...

Current Settings PS 4.0 over 10.6-18.0 (cmH2O) BiLevel Auto
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06-09-2015 10:03 PM
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eviltim Offline

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Post: #53
RE: new hoseless cpap promised
They may want to rethink their funding campaign in light of this...

http://www.washingtonpost.com/blogs/the-...ckstarter/
06-11-2015 09:55 AM
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islandjerr Offline

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Post: #54
RE: new hoseless cpap promised
I am not sure how powerful the battery is or the life of these disposable units. I have seen that they are looking for rechargeable batteries and all of the new technology. Frankly, I just hope that they come up with an approved unit that will function at an acceptable price. Technology is perpetually changing and I expect this to become a reality in the next year or so.
06-16-2015 02:19 PM
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lmoretti Offline

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Post: #55
RE: new hoseless cpap promised
Alright... let's do some math..

I found a company commercially selling "Microblowers" (Also, these ones are 2cm*2cm)

20cmH2O ~= 2 KPA.

At that pressure, the blower has < 0.5L per Minute of flow. Flow rate for a CPAP is conservatively 20l/minute, or 40 pumps.

Their Tech sheet says typical consumption is 0.2W, so we're looking at least at 8W of continuous draw for 8+ hours, so 64Whrs of power needed for a night.

A zinc-air battery has a practical energy density of 470Whrs/Kg, or .47Whrs/g. To supply the power, they'd need ~140g of just battery, or about 1/4 lb.

Feasable so far, if bigger than the picture. Issue is that the battery is 1.65V and the blowers need 10V-20V. Since Whrs scale with voltage, you're now talking about needing 9x the amount of battery to power it, even if you ignore that the voltage converter will have losses, so about 2.5lb of battery just hanging off your nose.
06-16-2015 04:17 PM
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Terry Offline

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Post: #56
RE: new hoseless cpap promised
The reason it looks startrek-y is because it uses technology only available in the future.
06-16-2015 08:37 PM
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OMyMyOHellYes Online

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Post: #57
RE: new hoseless cpap promised
Can we please put the discussion about this POC hoax to bed?
06-17-2015 11:45 AM
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