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asv and events

PostPosted: Tue Sep 22, 2015 6:25 pm
by Krob
When scoring an ASV titration, patient shows no effort, yet there is flow(from machine) along with a desat, is this scored as a central apnea or central hypopnea?

Re: asv and events

PostPosted: Tue Sep 22, 2015 7:18 pm
by somnonaut
More than likely you are not getting true flow as the machine is mechanically blowing air but more than likely not fully inflating the lungs as these machines are not respirators. The desaturation is proof that flow is seriously compromised. Does flow signal diminish during this period? If it does mark as hypopnea if it meets criteria. If not, I would mark as Central Apnea and chalk the flow signal up to artifact from mechanical initiation that is not enough to spur the system to take a breath and finish filling the lungs, hence the desat.