Principles of Operation
120
Instructions for Use Oxylog 2000 plus SW 1.n
The device then produces an increase in pressure
up to the preselected PS pressure ∆Psupp above
PEEP, which is adjustable to the breathing require-
ment of the patient.
The time for this pressure increase (Slope) is
adjustable:
– In case of rapid increase in pressure, the
Oxylog 2000 plus supports the insufficient
spontaneous breathing of the patient with a high
peak flow.
– In case of slow increase in pressure, the
Oxylog 2000 plus begins gently with regular
inspiratory flow. The patient has to take over
more breathing effort.
With the patient adjusted pressure increase and the
pressure ∆Psupp above PEEP, the patient's own
breathing activity defines the required inspiration
flow.
PS is terminated:
– when the inspiration flow returns to zero during
phase I, i.e. when the patient exhales or fights
the ventilator.
Or
– when the inspiration flow in phase II falls below
25% of the inspiration flow previously supplied
(and thus ∆Psupp above PEEP is reached).
Or
– after 4 seconds if the two other criteria have not
come into operation.
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