General information
1-2
10070389 Rev. A
Puritan Bennett™ 700 Series Ventilator System Service Manual
Ventilator maintenance may involve exposure to hazardous materials, equipment, and
conditions such as: possible electrical shock; pressurized gas; transmittable diseases; and fire,
which could result from an oxygen-enriched environment and easily ignitable material.
Before servicing the 700 Series Ventilator System, be aware of possible hazards and necessary
precautions to be taken.
•
Familiarize yourself with the warnings and cautions on the ventilator labels and in
related publications, including this manual.
Also familiarize yourself with any warnings
and cautions associated with the service equipment and materials being used, as well as
those posted in the facility where the ventilator is serviced.
• Use any applicable personal protective equipment and adhere to the applicable warnings
and cautions.
•
Be aware of the safety standards and considerations specific to your situation.
Safety
standards may vary with international, federal, state, and local regulatory agencies. When
in doubt, consult material safety data sheets; environmental, health, and safety
professionals; and regulatory affairs specialists. In addition, many facilities and institutions
may have their own special safety considerations.
•
Be sure the ventilator passes the performance verification (Chapter 5) before it is
returned to operation after being serviced.
The performance verification ensures the
product’s safety in addition to its functional integrity.
1.3 General description
The 700 Series Ventilator System (including the 740 and 760 Ventilators) provides respiratory
support for a wide range of pediatric to adult patients for a wide variety of clinical
conditions. The ventilator’s mixing technique allows it to ventilate critically ill patients at
adjustable oxygen concentrations without the need for a blender, compressor, or hospital-
grade wall air.
The 700 Series Ventilator System can be mains or battery powered. Each ventilator includes
two microcontrollers: one for breath delivery (which controls ventilation), and one for the
user interface (which monitors ventilator and patient data). Each microcontroller verifies that
the other is functioning properly. Using two independent microcontrollers in this fashion
prevents a single fault from causing a simultaneous failure of controlling and monitoring
functions.
The 700 Series Ventilator System supplies mandatory or spontaneous breaths with a piston-
based pneumatic system. Mandatory breaths can be
volume control ventilation
(VCV,
available on 740 and 760 Ventilators) or
pressure control ventilation
(PCV, available on the
760 Ventilator only). VCV delivers breaths to the patient at a preset tidal volume, peak flow,
waveform, and oxygen concentration at a minimum respiratory rate. PCV delivers breaths to
the patient at a preset inspiratory pressure, I:E ratio or inspiratory time, rise time factor (how
quickly inspiratory pressure rises to achieve the set inspiratory pressure), and oxygen
concentration at a minimum respiratory rate. A spontaneous breath allows the patient
inspiratory flows of up to 300 L/min, with or without
pressure support ventilation
(PSV). On
the 760 Ventilator, you can set the rise
time
factor and exhalation flow sensitivity (that is, the
point at which the ventilator cycles from inspiration to exhalation) in PSV.
The ventilator begins
apnea ventilation
if no patient- or operator-initiated breath is
delivered within the operator-selected apnea interval. Apnea ventilation is available in all
modes (for ventilators equipped with software Rev. J or later). On the 740 Ventilator, only
VCV breaths are available in apnea ventilation. On the 760 Ventilator, VCV or PCV breaths are
available in apnea ventilation.
Содержание Puritan Bennett 700 Series
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