کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2848502 1167426 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Detection of partial endotracheal tube obstruction by forced pressure oscillations
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی فیزیولوژی
پیش نمایش صفحه اول مقاله
Detection of partial endotracheal tube obstruction by forced pressure oscillations
چکیده انگلیسی

Rapid airway occlusions during mechanical ventilation are followed immediately by high-frequency pressure oscillations. To answer the question if the frequency of forced pressure oscillations is an indicator for partial obstruction of the endotracheal tube (ETT) we performed mathematical simulations and studies in a ventilated physical lung model. Model-derived predictions were evaluated in seven healthy volunteers.Partial ETT obstruction was mimicked by decreasing the inner diameter (ID) of the ETT. In the physical model ETTs of different ID were used. In spontaneously breathing volunteers viscous fluid was applied into the ETT's lumen.According to the predictions derived from mathematical simulations, narrowing of the ETT's ID from 9.0 to 7.0 mm decreased the frequency of the pressure oscillations by 11% while changes of the respiratory system's compliance had no effect. In volunteers, a similar reduction (10.9%) was found when 5 ml fluid were applied.We conclude that analysis of pressure oscillations after flow interruption offers a tool for non-invasive detection of partial ETT obstruction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Respiratory Physiology & Neurobiology - Volume 155, Issue 3, 15 March 2007, Pages 227–233
نویسندگان
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