REM SLEEP Faud

Topics related to in home sleep testing (portable monitoring)

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Re: REM SLEEP Faud

Postby Jayhawkhenry » Mon Jun 30, 2014 9:23 pm

When that device first hit the market, I asked one of the Israeli engineers to explain it to me, he never did.
I think it comes down to the way the Great Carnac would tell you what's going on.
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Re: REM SLEEP Faud

Postby Hypnagogic Hal » Fri Jul 11, 2014 4:15 pm

And did you have to dig and dig for this kind of patient (non-compensating) or is it fairly common?


We see a significant number of patients with advanced cardiac pathology. It is not uncommon for us to be the first medical facility to identify these problems during a routine test for sleep apnea. (We probably catch a run of V-tach or undiagnosed a-fib about once a month.) And with HSTs, who knows how many of these patients have heart problems? Most of them have never been properly screened. We don't look specifically for non-compensating cardiac patients, but it wasn't hard to find an example.
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Re:

Postby linuxgeek » Sun Jul 13, 2014 2:33 am

somnonaut wrote:Still puzzled by Watchpat and their mysterious black box technology. So, I had to seek other sources for an explanation to the digital photoplethysmographic technology as used in something like Watchpat.

http://www.dantest.com/dtr_pwv_overview.htm

A physician was telling me that Watchpat uses an electric signal across the finger to gauge arterial tone. This sound specious. Does anyone know exactly how Watchpat is doing its magic?


I'm pretty sure it's just a photoplethysmogram (PPG, or you may know it as pulse wave) with a bit of pressure applied. This is pretty much the same thing that a regular oximeter uses to get spo2 signal. The next model will have the oximeter and their PPG signal in the same probe. It's definitely not an electrical signal. PAT is mostly just a marketing term.
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Re: REM SLEEP Faud

Postby somnonaut » Sun Jul 13, 2014 10:21 pm

Thanks, but I am confused still. The current probe has a lining which needs to be peeled off prior to applying to finger. Being that the probe is inside a hard shell, why would it need some sort of single use component? Oximeters are routinely reused pt to pt in all sorts of settings. Did Itamar just make a reusable sensor into a single use to add a consumable revenue stream to the process?
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Re: REM SLEEP Faud

Postby somnonaut » Sun Jul 13, 2014 10:25 pm

[posted before finished my thought]
or is the technology truly in need of making direct firm contact with the skin to enable some flow of mojo to get their PAT signal? Why can every other maker use a spring shell to get their signal, but Itamar requires a formed shell with a single use sensor inside?

So, back to the actual signal. Do you see the PPG changing with every arousal?
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Re: REM SLEEP Faud

Postby linuxgeek » Wed Jul 16, 2014 9:34 pm

I believe the adhesive lining is primarily used for a consistent application. Somehow, putting the finger in the lining creates an approx. 40mmHg of pressure, which remains below the diastolic pressure. The adhesive also helps in the claims of chain of custody, since supposedly removing it and re-applying it doesn't work. Also, the bracelet detects a break in the circuit, which is maybe why people think that it's measuring some electrical property.

For the most part the PPG changes during arousal, but also at other times.
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Re: REM SLEEP Faud

Postby somnonaut » Thu Jul 17, 2014 4:21 am

Is the inside of the probe sticky?
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Re: REM SLEEP Faud

Postby sleepadmin » Thu Jul 17, 2014 8:39 am

If you call them, they will send you a demo. Why not use it in conjunction with the patient types you are concerned over. You could even put together a poster for the next APSS.
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Re: REM SLEEP Faud

Postby somnonaut » Thu Jul 17, 2014 11:40 am

Thanks, But I do peds now.
I am just interested in whether this possible drawback is real.
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Re: REM SLEEP Faud

Postby linuxgeek » Sat Jul 19, 2014 1:16 am

somnonaut wrote:Is the inside of the probe sticky?


Yes.
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Re: REM SLEEP Faud

Postby somnonaut » Sat Jul 19, 2014 2:31 am

Have you ever defeated the adhesive in one of the probes to see if it works on different patients, and the "adhesive" is only to thwart reusing the sensor? A revenue stream.
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Re: REM SLEEP Faud

Postby tiredjohnny1 » Sat Jul 19, 2014 4:06 pm

This thread is a great!!!! Would make a wonderful article for publication.
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Re: REM SLEEP Faud

Postby Prote » Fri Jan 25, 2019 12:55 am

Nearly 5 years later how do you all stand on this?
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