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Sleep Style 200 Pressure Wrong
#1
Sleep Style 200 Pressure Wrong
My dad has an old F&P Sleep Style 200 dumb brick that he is rather fond of.  It's probably over 15 years old and hasn't been to a DME for any calibration or checks in 10 years.  He says he changes the filters, but I don't know how often.

I built a homemade manometer and decided to do a pressure test using a T-fitting and a new mask.  The machine was set to 7 cmw.  The static pressure was 8 cmw (maybe the altitude setting was off - I didn't check it), IPAP was a steady 6 cmw during inhale, and EPAP was a steady 10 cmw during exhale.  I'm going to assume that this isn't the machine's intended bahaviiour, especially when I compared it to my own machine.  Is there a way to re-calibrate the machine, or does anybody know the likely cause of the problem and/or an easy fix?  Maybe cleaning an exhaust port on the machine or something similar?  Obviously I think its time for a new machine but my dad is a little resistant to change.

Thanks in advance.
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#2
RE: Sleep Style 200 Pressure Wrong
IPAP should be higher than EPAP. If yours is reporting that much backward difference, I would suspect maintenance is required.
Crimson Nape
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#3
RE: Sleep Style 200 Pressure Wrong
There is a plastic cover between the power switch and the front. Under that cover is a setscrew that adjusts pressure.

Other than a ramp I don't believe their is anything that affects pressure.
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#4
RE: Sleep Style 200 Pressure Wrong
Thanks for the info re: the set screw.  With these old machines, if there is no leak detection/correction then is it safe to assume that the blower simply operates at a fixed rpm constantly?  If so, then it makes sense pressure would drop on inspiration and rise on expiration and this machine behaviour would be expected notwithstanding how significantly it differs from modern machines.

I called my own DME to ask this question, and they didn't know the answer as the machine was around before they got into the industry.

Does anyone have the healthcare provider manual for the old Sleepstyle 230 series machines?
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#5
RE: Sleep Style 200 Pressure Wrong
Do any of the F&P manuals in the CPAP Setup Manuals - Search for: Fisher & Paykel SleepStyle 200 section not provide any help?
Crimson Nape
Apnea Board Moderator
www.ApneaBoard.com
___________________________________
Useful Links -or- When All Else Fails:
The Guide to Understanding OSCAR
OSCAR Chart Organization
Attaching Images and Files on Apnea Board
Apnea Helpful Tips

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#6
RE: Sleep Style 200 Pressure Wrong
I took a look at the Sleepstyle 200 auto series manual listed there thinking it was the closest thing. It indicated that no routine servicing or maintenance is required, other than cleaning. It didn't even mention the set screw mentioned above.

I'm thinking that there's a healthcare provider manual for the 230 series, though even that may or may not have the answer to my question.
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