Medin NC3 - Page 37

medin Medical Innovaons GmbH
Adam-Geisler-Str. 1
82140 Olching, Germany
+49 8142 448 460
info@medin-medical.com
www.medin-medical.com
IFU_medin-NC3 EN
Rev 05 Status as of 28.04.2021
37 of 68
Figure 5-3: Sub-menu Apnea sengs to change a) Inspiraon me, b) Apnea me c) Sensivity d) Backup
on/o e) Backup rate f) Level of the O
2
ush, g) Leak-Assist. The orange lines are used only to clarify the
signicance of the sensivity set as a limit between breathing and apnea and are not displayed by the medin-
NC3®. Instead, the sensivity is displayed on the le-hand edge of the CPAP curve as a pair of arrows (orange).
Warning:
Signicant amounts of condensate formaon in the tube system must be avoided since, as a result, the respiratory
signal in the CPAP pressure curve will be covered up, detecon of apnea phases can be prevented, and the triggering
of pushes can be inuenced.
Inspiraon: Figure 5-3 a
The seng in this eld determines both the duraon of pushes automacally triggered in the event of apnea, the
backup pushes, and the duraon of pushes triggered manually. It can be set to a me between 200 milliseconds
and 3 seconds.
Apnea me: Figure 5-3 b
The apnea me determines how long the medin-NC3® waits unl an automac push is triggered, if no respiratory
acvity can be detected in the CPAP pressure course. If no respiratory acvity can be detected even aer a push,
either the backup pushes are started or the device waits for the length of me set as apnea me before the next
push is triggered, depending on the backup seng. The length of me that can be set as the apnea me is any
me between 2 seconds and 30 seconds.
Please note:
The medin-NC3® has an internal block prevenng another apnea push being triggered immediately aer a push
for twice the length of me set as inspiraon me. This means that for a selected inspiraon me of two seconds,
the medin-NC3® does not emit any apnea push for four seconds aer the push, even if an apnea me of less
than four seconds is set.
Pushes based on the backup rate and manual pushes are not aected by this.
Sensivity: Figure 5-3 c
The sensivity seng determines the pressure uctuaons in the CPAP signal at which respiraon is detected. For
claricaon, the sensivity is shown as a pair of orange arrows on the le-hand side of the CPAP pressure curve
around the current CPAP average value. When seng the sensivity, the value selected here must be lower than the
pressure uctuaon caused by the paent’s normal respiraon. However, the value must also be greater than the
pressure uctuaons caused by the CPAP system. For the pressure signal shown in Figure 5-3 (without respiraon
on the le, with respiraon on the right), the sensivity shown in orange would be correct as it is lower than the
pressure uctuaons caused by respiraon and greater than the noise of the pressure signal without respiraon.
The purpose of this seng is to allow the medin-NC3® to deal with periods in which the CPAP pressure signal
remains within the limits as apnea and with situaons in which these limits are exceeded as respiratory acvity.