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medin Medical Innovations GmbH
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D-82140 Olching
OP_medinCNO EN
Rev 12 Stand 06.03.2019
33
von
68
Since leakage from the mask and prongs causes a decrease in the pressure during a push, this leakage must be
checked before increasing the push flow. An increase in the push flow is not a substitute for leak-proof
positioning of the mask or prong!
During a push, the set basic flow (
Flow
) and additionally the set push flow (
F
insp
) are emitted such that an
increase in the basic flow also causes an increase in the CPAP pressure during a push.
When setting the additional flow during a push, it should be ensured that:
•
The
CPAP pressure high
alarm sounds and briefly stops the flow emission to the patient starting
from a CPAP pressure of 18 mbar. That is, if the push is set such that its pressure is very high, a
slight change in the leakage or expiration against push by the patient will cause the medinCNO
®
to
briefly stop the flow and trigger an alarm. To prevent this, the push flow must be reduced.
•
If a very high overall flow is set in the event of a push, high dynamic pressure may develop in the
tube system. If this exceeds 40 mbar, the
Feed pressure high
alarm is triggered and the flow
emission to the patient is stopped. In this case, the push flow set must be reduced and the leakage
at the patient reduced. Depending on the duration of the high feed pressure, the medinCNO
®
automatically restarts the flow after a short time or not until after confirmation from the user (if
Press alarm reset to restart flow
is displayed).
•
During a push, if a flow is set that is so high that it triggers the
Feed pressure high
alarm and
simultaneously a
CPAP pressure high
alarm, it is possible that the text
Press alarm reset to start
flow
may also be displayed. In this case, the medinCNO
®
stops the flow until the user restarts it by
pressing the Alarm Reset button.
Please note:
In order to be able to use the
manual push
function at all times, the level of the additional push flow
F
insp
should
be set in advance (e.g. at the start of the CPAP therapy) and adjusted as needed in the event of flow changes.
Factors that can exert an influence on the adjusting CPAP pressure during a push:
-
Patient’s respiration: In a similar way to the pressure fluctuations that are caused by the patient’s
breathing during CPAP therapy and are displayed on the CPAP pressure curve along with other
parameters, the patient’s respiratory activity has an influence on the actual level of push which is
achieved.
-
Tube system volume and push level: The volume of air in the tube system must be compressed
before the increased flow triggered by the medinCNO
®
causes the CPAP pressure in the Medijet
®
to rise. If large tube systems are used, or if the difference between the basic flow and the total
flow during the push is considerable, it will take some time to reach the desired CPAP pressure. If
the duration of the push is shorter than this time lag, it will not be possible to achieve the desired
push pressure.
-
Changes to the CPAP system and changes in leakage conditions: Since the user determines the
necessary amount of additional flow during a push (
F
insp
), taking into account any leakage situation
present at this point in time, the level of the push changes when the leakage changes. If the
pressure values during a push are too low, check for leaks and resolve them. Decreases in the
leakage, changes to the Medijet
®
and tube system or temperature effects may cause increased
pressure values during a push.
Triggering a manual push
A push can be triggered manually in all medinCNO
®
modes. This is simply done by pressing button d in Figure
5-1. The medinCNO
®
responds to this by immediately triggering a push. The duration of the push triggered
depends on the current mode: The push duration set in the SNIPPV and Apnoea CPAP mode is triggered. The
set push duration corresponds to the set duration of the
inspiration
. In CPAP and oscillation mode, pressing
the button triggers a push that lasts for 500 milliseconds. If the button is held down,
no
additional push is
Summary of Contents for medinCNO
Page 1: ...User manual for medinCNO...
