Resmed vpap noisy

Barnaby · Post by **Barnaby** » Sat Nov 05, 2005 10:48 am

Does anyone have a problem with the humming of the resmed bi-pap. It is a light hummng sound on exhale and then faster and louder on inhale. I told my RT on the phone that it lightly blows air ( silently) all the time it is not in use... unless I turn off the power switch on the back. She said that sounds normal I said no..it cant be blowing air when I press the stop bar. Should I expect her to swap the machine for me? I am on medicare and pay ziltch. She is to call me soon about stopping at the house..should I request a different exchange machine ??

john57b · Post by **john57b** » Sat Nov 05, 2005 12:23 pm

It is normal for ResMed machines to blow lvery ow when off. That is a cool down mode to help reduce moisture bulit up.My Spirit does the same thing.

Guest · Post by **Guest** » Sat Nov 05, 2005 2:15 pm

[quote="john57b"]It is normal for ResMed machines to blow lvery ow when off. That is a cool down mode to help reduce moisture bulit up.My Spirit does the same thing.

_________________
But I dont think that the cool down is for 30 minutes or more?

rested gal · Post by **rested gal** » Sat Nov 05, 2005 2:42 pm

Barnaby, I think that's probably normal for ResMed machines....that business of still blowing air softly after you hit the bar to turn it off. The three ResMed machines I used (Spirit Auto and two VPAP III's) all did that.

Recently saw an explanation by sleep talker for "why":

Oct 29 2005 subject: Autopap Spirit Questions

dsm · Post by **dsm** » Sat Nov 05, 2005 8:30 pm

I noticed that both the S7 Elite & S7 Spirit turn on a very small flow of air when I start the h/h. I guessed it was something to do with moisture control - I guess if there were no water in the unit & the h/h gets turned on, then a gentle airflow ensures that h/h doesn't suffer in any way.

Cheers

RG's link explains it well.

DSM

~christineu~ · Post by **~christineu~** » Sun Nov 06, 2005 12:55 am

BiPAPs, by their very nature, have a more noticable sound then CPAPs, so what you are describing is pretty typical. The fan motor has to ramp up and ramp down with every breath cycle, so you notice the differnce in sound. Its not that BiPAPs are any louder at a given pressure then a CPAP would be at the same pressure, for the most part, its that the pressure is constantly changing. If we could change the pressure on CPAP every 2 seconds, they would sound the same. That said, every machine has its own 'voice'- 2 people can have identical xPAPs and one may be extremely quiet well the other might be relatively louder. Pressure level makes a difference too- higher pressures will be louder then lower ones.

You can minimize the sound by placing it lower then the head of your bed. Some people find putting it on something soft, like a towel or rubbery shelf grippy can help- you just want to make sure that nothing blocks the air intake or any air vents. Some people go to the extreme of putting it inside of something, but you have to be very careful that there is enough air circulation or you might as well put your head the box for as much fresh air as you will get