Covidien Newport e360, Руководство по обслуживанию

Страница: 135 / 154

Safety Features
Service Manual A-9
A.4.3
SPONT (Spontaneous)
In SPONT, all breaths delivered to the patient are spontaneous breaths. When Volume Control or
Pressure Control breath types are selected, the user may choose to add Pressure Support to assist
spontaneous efforts. When Volume Target Pressure Control* mandatory breath type is selected, all
spontaneous efforts are assisted by Volume Target Pressure Support.
The Trig setting determines the airway pressure or airway flow threshold that the patient’s effort
must reach in order to trigger spontaneous breathing assistance from the ventilator.
If there are no patient efforts or if the patient efforts fail to cause enough airway pressure or airway
flow change to meet the set
Trig threshold, no spontaneous breathing assistance is provided.
* not available on the S model
A.5
Safety Features
•
Protection from overpressurization
•
Protection from rebreathing exhaled gases
The ventilator’s software allows the user to perform a pre-use leak, compliance, and resistance tests
of the patient breathing circuit, humidifier, and filters. Other software-based selections include:
breathing circuit compliance compensation of flow/volume delivery and monitoring on or off,
circuit type in use (heated expiratory limb (high output), heated inspiratory expiratory limb (middle
output), or HME), leak compensation on or off, set time and date, and adjust for operation at the
local altitude.
All modes of ventilation and breath types on the ventilator include a range of settings appropriate
for adult or pediatric/infant patients. To maximize patient safety, the control panel has an
Accept
button that must be pressed to activate any setting changes. This feature is to prevent accidental
changes. The ventilator has settable alarm limits for high and low peak airway pressure, high and
low expiratory minute volume, high respiratory rate, circuit disconnect threshold, and apnea. The
Low Minute Volume alarm activates back-up ventilation, which increases respiratory rate in A/CMV
and SIMV and provides pressure-controlled ventilation according to safe basic settings in SPONT
mode in order to increase ventilation back to acceptable values during the alarm condition. In
addition, there are built-in alarms limits for O
2
monitoring, low baseline pressure, high baseline
pressure, sustained high baseline pressure, gas supply failure, device alert, and power switchover.
If a condition, such as low battery power during battery operation or component malfunction,
occurs and the ventilator cannot maintain reliable operation, it declares a Device Alert alarm. This
alarm cannot be silenced without first powering off the ventilator. An alarms and message bar on
the GUI clearly displays all alarm and informational messages. An alarm lamp on the top of the
device lights with all alarms. It can be viewed from 360º. In addition, a separate control panel
indicator lights in case of a device alert.
The exhalation system is heated to prevent moisture in the exhaled gas from being condensed in
the exhaled flow monitor system. It features low exhalation flow resistance to allow rapid return to