GE Carestation 620 User's Reference Manual page 227

2076152-001
11 Specifications and theory of operation
• Volume control ventilation (VCV)
The system offers the following optional modes of mechanical
ventilation:
• Pressure control ventilation (PCV)
• Pressure control ventilation - volume guaranteed (PCV-VG)
• Synchronized intermittent mandatory ventilation - volume control
ventilation (SIMV VCV)
• Synchronized intermittent mandatory ventilation - pressure
control ventilation (SIMV PCV)
• Synchronized intermittent mandatory ventilation - pressure
control ventilation - volume guaranteed (SIMV PCV-VG)
• Pressure support ventilation with apnea backup (PSVPro
• Continuous positive airway pressure + pressure support
ventilation (CPAP + PSV)
Volume control mode (VCV)
Volume control ventilation supplies a set tidal volume. The ventilator
calculates a flow based on the set tidal volume and the length of the
inspiratory time to deliver that tidal volume. It then adjusts that output
by measuring delivered volumes at the flow sensors. Since the
ventilator adjusts output, it can compensate for breathing system
compliance, fresh gas flow, and moderate breathing system leaks.
A typical volume-control pressure waveform increases throughout
the entire inspiratory period, and rapidly decreases at the start of
expiration. An inspiratory pause is available to improve gas
distribution.
VCV mode settings:
• TV
• RR
• I:E
• Tpause
• PEEP
• Pmax
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