624074/07 B-7
Figure B-2. P-CMV control window
B.3 SIMV (synchronized intermittent mandatory
ventilation) modes
The HAMILTON-G5’s SIMV modes (SIMV and P-SIMV) guaran-
tee one or more breaths are delivered within an interval deter-
mined by the operator-set Rate. A combination of mandatory
and spontaneous breaths can be delivered.
Each SIMV breath interval includes mandatory time (Tmand)
and spontaneous time (Tspont) portions (Figure B-3). During
Tmand, the ventilator waits for the patient to trigger a breath.
If the patient does trigger a breath, the ventilator immediately
delivers a mandatory breath. If the patient does not trigger
a breath, then the ventilator automatically delivers a manda-
tory breath at the end of Tmand. After the mandatory breath
is delivered, the patient is free to take any number of sponta-
neous breaths for the remainder of the SIMV breath interval.
Apnea backup ventilation can be activated in the SIMV modes.
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