Optional volume-controlled ventilation represents a technological advancement over volume-controlled SIMV. Rather than using the set respiratory rate, this mode uses the mandatory minute volume (f x Vt) as the control variable. The patient's spontaneous breathing effort is constantly monitored and compared to the set minute volume. If spontaneous breathing is unable to deliver the mandatory minute volume, a machine breath is triggered. If spontaneous breathing is adequate, no such breaths will be initiated. Instead, respiratory support will be maintained in spontaneous mode, usually with pressure support. In patients with no spontaneous breathing activity, ventilatory support is in the form of continuous mandatory (f x Vt) ventilation. In patients who stop breathing for short periods of time, the mandatory ventilation component provides an intelligent back-up system for apnoea ventilation.
Adjustable Parameters:
- Respiratory rate (f)
- Tidal volume (Vt)
- Inspiratory to expiratory time ratio (I:E) or inspiratory time (Tinsp)
- Gas flow rate (Flow)
- Inspired oxygen delivery (O2)
- PEEP
- Pressure support (PS)
- Pressure limit (Pmax)
- Trigger
Manufacturer | Comparable modes | Nomenclature |
---|---|---|
Air Liquide | - | - |
Puritan Bennett 980 | - | - |
Dräger: Evita 4 Dräger: XL |
Mandatory Minute Volume Ventilation | MMV |
Dräger: Evita V300 Dräger: Evita V500 |
Mandatory Minute Volume Ventilation (Volume control) |
VC-MMV |
GE Healthcare | - | - |
Hamilton: G5 Hamilton: S1 |
- | - |
Hamilton: T1 / C1-C3 / C6 |
- | - |
Maquet | - | - |
Mindray | - | - |
Philips | - | - |
Salvia medical: elisa edition |
- | - |
Löwenstein Medical: elisa 300 - elisa 800VIT |
Optional VCV / Optional Volume Controlled Ventilation | Opt. VCV |