Limits...
Newer nonconventional modes of mechanical ventilation.

Singh PM, Borle A, Trikha A - J Emerg Trauma Shock (2014)

Bottom Line: Over the years, many small modifications in ventilators have been incorporated to improve patient outcome.Various intensive care units over the world have found these modes to improve patient ventilator synchrony, decrease ventilator days and improve patient safety.Their working principles with their advantages and clinical limitations are discussed in brief.

View Article: PubMed Central - PubMed

Affiliation: Department of Anaesthesia, All India Institute of Medical Sciences, Delhi, India.

ABSTRACT
The conventional modes of ventilation suffer many limitations. Although they are popularly used and are well-understood, often they fail to match the patient-based requirements. Over the years, many small modifications in ventilators have been incorporated to improve patient outcome. The ventilators of newer generation respond to patient's demands by additional feedback systems. In this review, we discuss the popular newer modes of ventilation that have been accepted in to clinical practice. Various intensive care units over the world have found these modes to improve patient ventilator synchrony, decrease ventilator days and improve patient safety. The various modes discusses in this review are: Dual control modes (volume assured pressure support, volume support), Adaptive support ventilation, proportional assist ventilation, mandatory minute ventilation, Bi-level airway pressure release ventilation, (BiPAP), neurally adjusted ventilatory assist and NeoGanesh. Their working principles with their advantages and clinical limitations are discussed in brief.

No MeSH data available.


Related in: MedlinePlus

Ventilatory graphics in classical volume control mode
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4126124&req=5

Figure 3: Ventilatory graphics in classical volume control mode

Mentions: It can be understood from the equation of motion that the ventilator can control either the left side of the equation (i.e., airway pressure) or the right side (i.e., volume and flow). In volume control, [Figure 3] the ventilator controls flow indirectly controlling volume. Holding, inspiratory flow constant during inspiration causes volume and pressure to rise linearly. Inspiration ends (cycles off) when a preset tidal volume is met. In contrast in pressure control ventilation [Figure 4], airway pressure is held constant during inspiration. This causes inspiratory flow to fall exponentially from its peak value toward 0 as volume rises exponentially. Inspiration ends after a preset inspiratory time or after a preset inspiratory flow threshold (depending on cycle variable).


Newer nonconventional modes of mechanical ventilation.

Singh PM, Borle A, Trikha A - J Emerg Trauma Shock (2014)

Ventilatory graphics in classical volume control mode
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4126124&req=5

Figure 3: Ventilatory graphics in classical volume control mode
Mentions: It can be understood from the equation of motion that the ventilator can control either the left side of the equation (i.e., airway pressure) or the right side (i.e., volume and flow). In volume control, [Figure 3] the ventilator controls flow indirectly controlling volume. Holding, inspiratory flow constant during inspiration causes volume and pressure to rise linearly. Inspiration ends (cycles off) when a preset tidal volume is met. In contrast in pressure control ventilation [Figure 4], airway pressure is held constant during inspiration. This causes inspiratory flow to fall exponentially from its peak value toward 0 as volume rises exponentially. Inspiration ends after a preset inspiratory time or after a preset inspiratory flow threshold (depending on cycle variable).

Bottom Line: Over the years, many small modifications in ventilators have been incorporated to improve patient outcome.Various intensive care units over the world have found these modes to improve patient ventilator synchrony, decrease ventilator days and improve patient safety.Their working principles with their advantages and clinical limitations are discussed in brief.

View Article: PubMed Central - PubMed

Affiliation: Department of Anaesthesia, All India Institute of Medical Sciences, Delhi, India.

ABSTRACT
The conventional modes of ventilation suffer many limitations. Although they are popularly used and are well-understood, often they fail to match the patient-based requirements. Over the years, many small modifications in ventilators have been incorporated to improve patient outcome. The ventilators of newer generation respond to patient's demands by additional feedback systems. In this review, we discuss the popular newer modes of ventilation that have been accepted in to clinical practice. Various intensive care units over the world have found these modes to improve patient ventilator synchrony, decrease ventilator days and improve patient safety. The various modes discusses in this review are: Dual control modes (volume assured pressure support, volume support), Adaptive support ventilation, proportional assist ventilation, mandatory minute ventilation, Bi-level airway pressure release ventilation, (BiPAP), neurally adjusted ventilatory assist and NeoGanesh. Their working principles with their advantages and clinical limitations are discussed in brief.

No MeSH data available.


Related in: MedlinePlus