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Re: Interpretation of Software for 418P

Posted by Perry on March 31, 2002 at 11:31:35:

In Reply to: Re: Interpretation of Software for 418P posted by Gills on March 30, 2002 at 04:34:12:

Gills:

The 418P has a feature that allows you to limit the maximum pressure that the machine will respond when it sees an Apnea. This can be usefull for a few people who have a small degree of non-CPAP responsive Central Sleep Apnea. Most CSA seen in OSA patients is caused by confused breathing triggers, and sorts itself out once PAP therapy starts. Most people with non-CPAP responsive CSA end up on Bilevel machines. In a few cases an AutoCPAP will work as long as it has some limitations on what it responds too.

ResMed built in a limitaiton that the AutoSet T will not respond to any apnea above a pressure of 10 for just this reason (because of the rare possiblity that the machine would increase pressure on a Central apnea).

Mallinckrodt felt that there was some merit in limiting the Apnea response for this case - and built in a feature that allows you to limit the function of the Apnea trigger. This is what the "Max pressure for Apnea" is.

For most people it should be set at their Max setting to allow the machine to respond to apneas.

The 418P is one of 2 machine with a central evnet detector (Apnea with Cardiac Oscilations - Apnea CA) which is effective on about 60% of all sleep lab scored centrals (but will not see a closed throat central).

Perry

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