Evaluating respiratory mechanics by forced oscillation via laryngeal mask in rabbits

Laryngeal mask airway (LMA) is frequently used to secure the airways under sedation or anaesthesia. Forced oscillation technique (FOT) is routinely performed through an endotracheal tube (ETT) to evaluate respiratory mechanics; although measuring the respiratory mechanics properly via an LMA has not been characterised. We compared the mechanical parameters obtained by FOT applied through LMA and ETT.In anaesthetised, mechanically ventilated rabbits (n=9) FOT was performed through an LMA at normal and reduced oscillatory amplitudes, at positive end-expiratory pressures (PEEP) of 3 and 6 cmH2O (P3, P6). The measurements were repeated at normal amplitude via an ETT. Airway resistance, inertance, respiratory tissue damping (G) and elastance (H) were measured by FOT. The potential bias of the distensible upper airways during FOT via the LMA was assessed by a simulation study.Parameters reflecting airway mechanics were significantly higher through the LMA at both PEEP and oscillatory amplitude. Conversely, there was a strong correlation (r=0.9 and r=0.84 at normal and reduced amplitudes, p
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Clinical respiratory physiology, exercise and functional imaging Source Type: research

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Source: BMC Anesthesiology - Category: Anesthesiology Authors: Tags: Research article Source Type: research
Authors: Abdel-Ghaffar HS, Abdelal FA, Osman MA, Soliman OM Abstract BACKGROUND: Since its introduction into clinical practice, the use of laryngeal mask airway (LMA) has been dramatically increasing. We aimed to investigate the clinical performance of single use LMA classic, AIR-Q and I-gel at different head and neck positions and during the operative procedure in pediatric elective day case surgery. METHODS: One hundred sixty-eight generally anesthetized spontaneously breathing children (2-9yr) were randomized to receive either LMA classic (n=56), I-gel (n=58) or AIR-Q (n=54). The oropharyngeal leak pressure ...
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Source: BMC Anesthesiology - Category: Anesthesiology Authors: Tags: Research article Source Type: research
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Source: Journal of Interventional Cardiac Electrophysiology - Category: Cardiology Source Type: research
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Source: Military Medicine - Category: International Medicine & Public Health Tags: Mil Med Source Type: research
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Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
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Source: Canadian Journal of Anaesthesia - Category: Anesthesiology Authors: Tags: Can J Anaesth Source Type: research
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Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
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Source: BMC Anesthesiology - Category: Anesthesiology Authors: Tags: Research article Source Type: research
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