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Ventilator-delivered mask ventilation compared with three standard methods of mask ventilation in a manikin model . BACKGROUND Little is known regarding the variations in effective ventilation during bag and mask resuscitation with standard methods compared with that delivered by ventilator-delivered mask ventilation ( VDMV ) . AIM To measure the variations in delivered airway pressure , tidal volume ( TV ) , minute ventilation ( MV ) and inspiratory time during a 3-min period of mask ventilation comparing VDMV with three commonly used hand-delivered methods of bag and mask ventilation : Laerdal self-inflating bag ( SIB ) ; anaesthetic bag and T-piece Neopuff . METHODS A modified resuscitation manikin was used to measure variation in mechanical ventilation during 3-min periods of mask ventilation . Thirty-six experienced practitioners gave positive pressure mask ventilation targeting acceptable chest wall movement with a rate of 60 inflations/min and when pressures could be targeted or set , a peak inspiratory pressure ( PIP ) of 18 cm water , positive end-expiratory pressure ( PEEP ) of 5 cm water , for 3 min with each of the four mask ventilation methods . Each mode was randomly sequenced . RESULTS A total of 21 136 inflations were recorded and analysed . VDMV achieved PIP and PEEP closest to that targeted and significantly lower variation in all measured parameters ( p < 0.001 ) other than with PIP . SIB delivered TV and MV over twice that delivered by VDMV and Neopuff . CONCLUSION During 3-min periods of mask ventilation on a manikin , VDMV produced the least variation in delivered ventilation . SIB produced wide variation and unacceptably high TV and MV in experienced hands .
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Intervention_Other
Ventilator-delivered mask ventilation
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Intervention_Other
bag and mask resuscitation
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Intervention_Other
ventilator-delivered mask ventilation ( VDMV )
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Intervention_Other
VDMV
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Intervention_Other
Laerdal self-inflating bag ( SIB )
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Intervention_Other
anaesthetic bag
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Intervention_Other
T-piece Neopuff
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Intervention_Other
mask ventilation
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Intervention_Other
mask ventilation
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Intervention_Other
VDMV
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Intervention_Other
VDMV
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Intervention_Other
Neopuff
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Intervention_Other
VDMV
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Outcome_Other
effective ventilation
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Outcome_Physical
delivered ventilation .