Pulmonetic Systems LTV 950 - Expiratory Hold

Page 6-8 LTV
®
Series ventilator Operator’s Manual
p/n 10664, Rev. Y
Expiratory Hold
An Expiratory Hold maneuver holds the expiratory phase of a delivered breath for a duration sufficient
to determine the AutoPEEP of a patient.
To perform the Expiratory Hold maneuver:
1) Push the Insp/Exp (Inspiratory/Expiratory) Hold button twice
and the display widow will toggle
from normal monitor display to EXP HOLD.
2) Push and hold the Insp/Exp (Inspiratory/Expiratory) Hold button during a Volume or Pressure
Control exhalation and the ventilator will perform an Expiratory Hold at the end of that exhalation.
• Exhalation will proceed normally with the exhalation valve open and normal bias flow.
• All buttons that are not lockable will operate normally.
• All buttons that are lockable will be ignored.
• The breath will remain in exhalation phase.
• If a Patient Effort is detected, the maneuver will be terminated and the appropriate breath
will be given.
• DISC/SENSE and HIGH PRES alarms will terminate the maneuver.
3) Continue holding the button until P Exp with a numeric value is displayed, or the next breath is
scheduled to begin, either due to Breath Rate or a Manual Breath button push. During the
maneuver:
• The exhalation valve will be closed.
• Flow will be set to 0 LPM.
• P Exp xxx will be displayed in the display window, where xxx is the real time circuit
pressure
18
.
• The breath will remain in expiration phase.
• DISC/SENSE and HIGH PRES alarms will terminate the maneuver.
• If a Patient Effort is detected, the maneuver will be terminated and the appropriate breath
will be given.
4) Release the button (or when 6.0 seconds elapse, whichever comes first):
• A normal inspiration phase will begin.
• AutoPEEP xxx will be displayed where xxx is the autoPEEP
18
.
• Any machine breath starts or apnea alarms that were held off will resume.
NOTE
Breath period timing and apnea timing will be suspended while the maneuver is performed. As a
result, the apnea alarm will not alarm during the maneuver.
REMARQUE
La synchronisation de la période de respiration et la synchronisation de l’apnée sont interrompues
pendant la manœuvre. Ainsi, l’alarme d’apnée ne se déclenche pas au cours de la manœuvre.
Range: P Exp 0 - 100 cmH
2
O
AutoPEEP 0 - 100 cmH
2
O
18
AutoPEEP is calculated as P Exp at end of Expiratory Hold maneuver minus P Exp at end of normal
exhalation (monitored PEEP).