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Term Definition
PEEP
Positive End Expiratory Pressure. Positive pressure in the
lung during expiration.
PIP
Peak Inspiratory Pressure. The maximum airway
pressure to occur during inspiration.
pulse oximetry
Pulse oximetry is a simple non-invasive method of
monitoring the percentage of hemoglobin (Hb) that is
saturated with oxygen, meaning the amount of oxygen
in the blood. The pulse oximeter is a sensor, which is
placed on the patient and connected to a unit. The unit
displays the oxygen saturation percent, a calculated
heart rate, and a graphical display of the blood flow
past the probe.
Purge System
Two high-pressure pumps (up to 700 cmH2O) intended
to periodically clean up the sensor lines. Purging cycle
may be chosen through the Advanced Menu.
Pressure Support Breath
A patient breath in which the ventilator elevates the
inspiratory pressure above the baseline (i.e. PEEP).
Available in SIMV and CPAP/PSV modes.
Pressure Trigger
A method of initiating a breath in response to patient
effort by measuring a decrease in airway pressure
below the baseline.
O
2
Oxygen.
Rise Time
The acceleration of pressure to reach the set target
pressure level.
RPM
Revolutions Per Minute.
SIMV
Synchronized Intermittent Mandatory Ventilation. A
mode of ventilation in which all breath types (ventilator,
assist, and patient) is allowed. Mandatory breaths are
synchronized with patient efforts.
Spontaneous Breath
A patient initiated breath.
Termination
The transition from the inspiratory phase to the
exhalation phase of a breath.
Tidal
Volume (V
T
)
The amount of volume inhaled and exhaled in a breath
(measured in milliliters).
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