THEORY OF OPERATION
4-2
OPRHT50NA B0908
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 primary 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 have 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 P trig 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, tI, 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.