SLE SLE5000 - BPM Tot. Measurement

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14.1.16 BPM Tot. Measurement.
The ventilator measures BPM in two different ways, with and without a flow
sensor.
When used without a flow sensor fitted, the ventilator measures pressure in the
proximal airway tube to determine whether a breath has been delivered. Because
of this monitoring of pressure, the BPM reading in the lung mechanics and
measurement panel, displays the total number of machine delivered breaths
(Mechanical breaths and triggered breaths).
When used with a flow sensor, the ventilator is measuring all the patient breaths
based on the tidal volume. The ventilator flow monitoring system recognizes a
breath as one inspiration followed by one expiration.
In the lung mechanics and measurement panel the BPM will be the total number
of patient breaths. Because of the monitoring of the tidal volume the BPM total is
made up of the total number of mechanical breaths, triggered patient breaths and
any breaths that do not reach the set breath detection level.
The above respiratory cycle would have only registered 2 breaths with pressure
monitoring as shown below.
Patient
Breath
Patient
Breath
Patient
Breath
Mechanical
Breath
Triggered
Breath
1 + 1 + 1 + 1 + 1 = 5
Breath
Count
Patient
Breath
Patient
Breath
Patient
Breath
Mechanical
Breath
Triggered
Breath
1 + 0 + 0 + 0 + 1 = 2
Breath
Count