The effect of introducing fibreoptic bronchoscopes on gas flow in laryngeal masks and tracheal tubes

Abstract

SummaryThe laryngeal mask airway, reinfbrced laryngeal mask airway and tracheal tube were studied to determine ( I )

British Thoracic Society guideline for diagnostic flexible bronchoscopy in adults: accredited by NICE

“…A single model (non-human) study addresses the issue of airway support device and size of bronchoscope 225. In this study, the laryngeal mask airway (LMA), reinforced LMA (RLMA) and ET were assessed in a simulated model of ventilation, measuring flow resistance during simulated inspiration and the maximum size of flexible bronchoscope (using oesophageal dilators to mimic six different sizes of bronchoscope (2.7–8.9 mm external diameter)).…”

Guidelines for diagnostic flexible bronchoscopy in adults: Joint Indian Chest Society/National College of chest physicians (I)/Indian association for bronchology recommendations

“…7 mm for TT size of 6.5 mm. [399] Another experimental model study demonstrated that bronchoscope size of 4 mm (or less) would allow safer procedures in patients with severe ARDS. [400] Similarly, Lawson et al .…”

Laryngeal mask airway for ventilation during diagnostic and interventional fibreoptic bronchoscopy in children

“…Also, the introduction of the FOB via a small tracheal tube in children partially occludes the airway, with subsequent increased airway resistance and disturbances of the ventilation–perfusion relationships (15–17). The internal diameter of the LMA is greater than that of an age appropriate‐size tracheal tube (18–20), thus allowing the use of a larger bronchoscope without a significant increase of the airway resistance.…”