Page 6-6 LTV
®
Series ventilator Operator’s Manual
p/n 10664, Rev. Y
Inspiratory Hold
An Inspiratory Hold maneuver holds the inspiratory phase of a delivered breath for a duration
sufficient to determine Δ Pres pressure and static lung compliance of the patient.
To perform the Inspiratory Hold maneuver:
1) Push the Insp/Exp (Inspiratory/Expiratory) Hold control button once
and the display window will
toggle from normal monitor display to INSP HOLD.
2) Push and hold the Insp/Exp (Inspiratory/Expiratory) Hold button during a volume inspiration.
• The ventilator will perform an Inspiratory Hold on the next Volume breath.
• P Plat
15
--- will be displayed in the display window.
• All buttons that are not lockable will operate normally.
• All buttons that are lockable will be ignored.
3) Continue holding the button until the Volume inspiration is completed. During the maneuver:
• The exhalation valve will remain closed.
• Flow will be set to 0 LPM.
• P Plat xxx will be displayed in the display window, where xxx is the real time circuit
pressure.
• The breath period will remain in inspiration phase so no breath triggers are allowed.
• DISC/SENSE and HIGH PRES alarms will terminate the maneuver.
4) Release the button when the pressure setting is P Plat (or when 6.0 seconds elapse, whichever
comes first):
• The exhalation valve will be opened and a normal exhalation phase will begin.
• The display will cycle every 2 seconds between Δ Pres xxx where xxx is the change in
pressure
16
, C Static xxx where xxx is the static compliance
17
and
P Plat xxx where xxx is the plateau pressure.
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 Plat 0 - 100 cmH
2
O
Δ Pres 0 - 100 cmH
2
O
C Static 1 – 999 ml/cmH
2
O
15
“P Plat” is Plateau pressure reached during Inspiratory Hold maneuver.
16
Δ Pres is calculated as P Plat Pressure – PEEP measured from previous breath.
17
C Static is calculated as Set Delivered Volume / Δ Pres.
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