Effects of helium on high frequency jet ventilation in model of airway stenosis

Abstract

Using 50% helium-oxygen during HFJV in the presence of airway stenosis allows an 18% increase in minute volume at generated airway pressures which are the same as or lower than those when using 100% oxygen.

Comparison of different methods of ventilation via cannula cricothyroidotomy in a trachea–lung model

“…1) was used, based on the one previously described. 12 This comprised a 210 mm length of corrugated plastic anaesthetic breathing system tubing (22 mm internal diameter), connected to a test lung (Siemens test lung 190, Siemens Medical Solutions, Bracknell, UK) which had a static compliance of 24 ml kPa 21 . The proximal end of the 'trachea' was open to atmosphere via a tracheal tube connector.…”

Air entrainment during high-frequency jet ventilation in a model of upper tracheal stenosis †

“…The lung -trachea model was as previously described 7 and comprised a Siemens Test Lung 190 (6006832E037E) (Siemens AG, Munich, Germany) connected to a corrugated plastic tube (210 mm length, 22 mm internal diameter) representing the trachea (Fig. 1).…”

Modelling: a core technique in anaesthesia and critical care research

“…The key, though, is in collaboration, and anaesthetists are well placed here. Research opportunities include: bench-top models of the upper airway, 20 computational models of the lung, 10 21 decision-support systems 16 22 and costing models. 23 In each of these cited examples, the investigators created a surrogate for examination, and the surrogate offered more accurate, reproducible, credible and feasible research outcomes than the alternative patientbased approach.…”