Sleeprider wrote:Flappy, I don't think we can dismiss this as SWJ, and I apologize for raising that earlier.

No need to apologize. There's not enough evidence in this thread to effectively determine sleep or wake states. On that basis of uncertainty, SWJ can't be ruled out.

I've seem this pattern for the last several nights. Not sure why. Any ideas? My CA and OA index for the night remains <1.0 but I would like to better understand those anomalies. Here is my version from last night...not good, but probably SWJ. Sleeprider is probably right about sleep-wake junk in th...

That said2, in a review of Respironics technology, it seems that Flow Offset only comes into play when the patient is actually "doing something" That makes sense if they're doing this to reference zero-flow: I suspect the manufacturers might reference zero-flow on-the-fly, by noting where inspirato...

In the aforementioned codes, E-81, 82, 85, 86 and 87 are non-fatal errors. The others are varying degrees of "show-stoppers". Well, IMHO they're all critical errors, with some being fatal. I'm guessing the designer(s) decided that ordinary sensor-drift maintenance didn't belong on that list of crit...

The problem comes with pressure. Generally, auto-calibration of pressure transducers is an attainable objective . Below is an example specific to CPAP: http://www.google.it/patents/US6237592 The above method assumes atmospheric pressure as transducer reference before the blower spins. Resmed and Re...

I don't know if we could just change out the sensor, and if the chip would automatically re-adjust / re-calibrate the pressure. Dunno. But I'd be surprised if Respironics didn't write firmware code to compensate for ordinary sensor drift. Zero-sum inspiratory & expiratory flow reversals should make...

There was some hard water deposit in the CPAP when I was using it near the humidifier. I opened my CPAP box and clean the inside and the motor, though I didn't clean the pressure sensor. I'll try to clean the sensor at the next opportunity. Those Honeywell MAS flow sensors are supposed to be moistu...

I think before giving up on the broken board, I'd try injecting short bursts of compressed air into the MAS flow sensor's two pressure ports, hoping to dislodge particulate matter. I'd also look for hairline cracks right where the CPAP hose or humidifier fits onto the machine. That plastic coupling ...

Scrutinize solder joints for halo breaks, capacitors for bulging, etc. Here's a video describing that:
https://www.youtube.com/watch?v=iLcBimRG4fs

I don't see "sides" in this. I don't agree with much of what Avi writes (including about me!), but I also don't agree with those who think he has malicious intent. I agree, SU. I see, in Avi, someone who probably excelled at his career by being both analytical and a contrarian. While that combinati...

How have things been going with your AVAPS -vs- AVAPS-AE comparison?

The noise ordinance in my town at night is a max 50 db. A refrigerator emits 50 db. Would a car muffler muffle that much? Our town has a similar noise ordinance. However, if one reads the ordinance further down the page, power generators and other emergency equipment are exempt during power-down em...

Madalot wrote: So unless something radical occurs, I won't post again for 3-4 days, once I get the comparison data.

I'll be out of touch with the message board until Tuesday of next week. But I look forward to finding out how your side-by-side comparison shaped up after I return.

Good luck!

I think that's a nice expansion with details, Jeff. Madalot's following-day symptoms are not great. That's a pattern she needs to keep a close eye on---for lack of important PSG measures. I would also add that the oximeter may be a confounder here, if it adds enough discomfort to deteriorate her sle...

EPAP higher than 9cm presents a potential discomfort. Additionally FOT presents a potential discomfort. While SpO2 and DirectView look good, there is no objective measurement of sleep quality in your present experiment---only a subjective assessment. Needless to say, I think your subjective assessme...