28 Functions and Parameters of the Vivo 40
Vivo 40 clinician’s manual
Doc. 003886 En-Us A-1e
Breath Rate (PSV & PCV only, mandatory)
The breath rate defines the minimum number of breaths the Vivo 40 will
deliver. If the number of spontaneous patient breaths per minute is less than this
number, Vivo 40 will uphold this rate.
In PSV mode the expiratory trigger is inactive during the non-patient triggered
breaths, and these breaths are delivered with an I:E ratio of 1:2 (up to maximum
inspiration time of 3 seconds). In PCV mode, non-patient triggered breaths are
delivered according to settings.
Rise Time (PSV & PCV only, mandatory)
The rise time setting controls the pressure increase to the desired IPAP value. A
high setting will give a slow increase and therefore a shorter plateau. A low set-
ting will give a faster increase and therefore a longer plateau.
Min and Max Inspiration Time (PSV only, optional)
If set, the min and max inspiration time setting defines a minimum and maxi-
mum length of each inspiration. If the min and max inspiration time are set off,
the length of each inspiration is dependent on the set expiratory trigger.
Inspiration Time (PCV only, mandatory)
The inspiration time setting controls the length of each inspiration.
Inspiratory Trigger (PSV mandatory, PCV optional)
The inspiratory trigger setting defines the patient’s effort required to initiate a
ventilator assisted breath.
When the patient starts a breath, an increasing flow is created in the patient cir-
cuit. If the patient reaches the set inspiratory trigger level, the increasing flow is
registered by the ventilator, and that immediately starts an inspiration. If the
patient cannot trigger a breath, the ventilator will deliver breaths according to
the set breath rate.
Expiratory Trigger (PSV only, mandatory)
The expiratory setting defines the patient's effort required to terminate an inspi-
ration at IPAP pressure level. To increase or to decrease the set patient effort
requirement the expiration trigger level can be set to a number between 1 and 9
where 1 is the lowest patient effort level setting and 9 is the highest effort level.
