Breas NIPPY ST+, Instruction Manual

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22
Sigh Function
The ventilator can be programmed to deliver an occasional sigh with a larger
tidal volume. This prevents collapse of the alveoli (atelectasis) which can result
from the patient constantly inspiring the same volume of gas. Sigh is available in
all modes except CPAP.
The Sigh function provides a timed inspiration at the IPAP and TI settings
specified in the Sigh Settings screen.
Sigh may be set for cyclic operation, sigh breath at the specified interval or an
external switch (Manual mode). Or a combination of both, where the cyclic sigh
may be supplemented by extra sigh breaths on demand.
Setting the Sigh function
Press MENU and select USER PREFERENCES. In the User preferences screen
select SIGH SETTINGS.
Use the SET button to scroll down the
settings, using the +/- buttons to alter the
settings.
Sigh Interval sets frequency of cyclic sigh
Ext Trig = manual switched sigh
Symbol S
m
I
shows Manual Sigh function is enabled.
Symbol
S
c
I
shows Cyclic Sigh function is enabled.
Blue Symbol = Sigh mode enabled.
Green Symbol = External sigh trigger
acknowledged.
Purple Symbol = Sigh breath activated.
Sigh breath pressure (S) is indicated on the
pressure bar-graph display.
Note: If the ventilator IPAP is adjusted after the sigh has been set up, this may affect
the sigh setting.
If the IPAP is reduced the sigh will be reduced by the same amount, to maintain the
difference between IPAP and Sigh. This can be overridden in the Sigh Settings
screen.
If IPAP is increased to a value equal to the sigh setting, the sigh value will “track” the
IPAP. This effectively makes IPAP and Sigh the same. This is done to prevent
accidental increase of the sigh breath. The sigh will need to be reset in the Sigh
Settings screen. Sigh is cancelled when Mode is changed.
The IPAP during Sigh cannot be lower than normal IPAP.
Regardless of the back-up rate, a sigh breath is timed with an IE ratio of 1:2. This
does not affect triggering.
High flow and disconnect alarm is suspended during Sigh.
No more than 5 consecutive sigh breaths are allowed.