(02-02-2016, 07:43 PM)PaytonA Wrote:(02-02-2016, 03:59 AM)_cy_ Wrote: yup aircurve 10 vauto sure has a lot of settings ..
unlike Respironics BiPAP Auto which adjusts ipap and epap independently. Aircurve 10 vauto only adjusts ipap with epap determined by PS setting.
max ipap and min epap are set in clinical mode. which set limits Aircurve 10 operates within. example say max ipap is set to 19 with PS set to 4 .. but aircurve 10 determine only 11.8 is needed. then aircurve 10 vauto will operate at: ipap 11.8 / epap 7.8 .. PS sets the spread between ipap and epap. if PS is 4.0, then spread will be 4.0. if say you need epap to be higher or 8.8 in above example .. then PS needs to be changed to 3.
The Aircurve 10 Vauto sets the EPAP to splint the airway and the IPAP is then determined by IPAP=EPAP+PS.
(02-02-2016, 03:59 AM)_cy_ Wrote: aircurve 10 vauto will track your Ti max and Ti min which is number of seconds your breathing cycle takes. during rampup if you will experiment with Ti max settings. you will notice air delivered during ipap will take longer or shorter. then Aircurve 10 Vauto is adjusting ipap duration to match natural breathing with Ti max setting limits. so aircurve 10 vauto allows pressure adjustment for ipap/epap and duration of ipap by changing Ti max settings.
behavior of Ti max settings were arrived at by increasing/decreasing Ti during rampup and tracking what Ti max actually changed.
The Aircurve 10 Vauto does not change the Ti max or the Ti min. These are static settings which limit the amount of time for the user to cycle from IPAP to EPAP.
If the Ti min is set to 0.3 and the user starts to exhale 0.2 seconds after the the start of inhalation, the machine will remain in IPAP until the 0.3 second mark has been reached.
Conversely, if the Ti max is set at 2.0 and the user has not started to exhale 2.0 seconds after the beginning of the inhale, the machine will drop to the EPAP that the machine is currently using.
gotta disagree above statement .. it's my understanding that Aircurve 10 Vauto sets ipap only then PS setting determines support pressures by setting pressure difference between ipap and epap.
it would make less sense for A10 Vauto to change epap + PS vs changing ipap less PS .. both technically would work .. be interesting to find out who is correct.
yes Ti max and Ti min are static settings that sets limits .. didn't realize my statements above implied otherwise.