THEORY OF OPERATION
4-2 SERHT50NA A0808
Any time external power is connected to the ventilator, the Dual
Pac Internal Battery system is charging. And when external power
is lost, the (new and fully charged) Dual Pac Internal Battery
system takes over and powers the HT50 for up to 10 hours, at
standard ventilator settings. A Battery Low Alarm alerts the user
when a minimum of 30 minutes operating time remains.
The HT50 is available with a built-in humidifier or without.
The HT50 is very easy to set up and use with clear indications of
all ventilation and alarm settings and alarm violations.
NOTE: When the HT50 is used in a home care environment it is
important that the pr
imary caregiver has received training and has
demonstrated competency in all equipment functions. A specific
written care plan must be established by the attending physician.
NOTE: Transport of patients with the HT50 requires that medical
staff ha
ve a good working knowledge of the ventilator’s use and
problem resolution. Proper emergency back-up equipment must
be immediately available during transport.
A/CMV MODE
(Assist/Control Mandatory Ventilation)
In A/CMV mode, time activated (mandatory) breaths are delivered
in accordance with the
ƒ setting. Patients can trigger mandatory
breaths in addition to, or in place of, time activated (mandatory)
breaths if the effort they generate causes airway pressure to meet
the Ptrig setting. Every such patient effort results in a mandatory
breath. The breath can be volume or pressure controlled.
PEEP/CPAP may be added. Tidal volume is determined by the
target pressure, t
I
, and patient respiratory mechanics in Pressure
Control and by the tidal volume setting in Volume Control.
As with all HT50 operating modes, Back-up Ventilation is activated
if the Low ▼V
•
I
alarm limit is violated.
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