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Aerosol delivery by an ultrasonic nebulizer during different mechanical ventilation settings in a lung model?– a pilot study

机译:超声雾化器在肺部模型中不同机械通气设置下的气溶胶输送?

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Abstract: Aerosol delivery of Iloprost is a promising therapeutic approach. The aim of this study was to determine the output of an ultrasonic nebulizer in different ventilation set-ups at the tip of different endotracheal tubes.Method: In set-up A, an ultrasonic nebulizer was connected directly to the endotracheal tube. In set-up B, the nebulizer was incorporated into the inspiratory limb of the ventilator circuit; a bypass arrangement allowed to selectively direct the expiratory air discharged from the model lung. The test lungs were ventilated through a standard endotracheal tube (ET) and through a double-lumen tube (DLT). The nebulizer was filled with 5 ml of a Tc-99m 0.9%-NaCl solution. After nebulization, distribution of radioactivity was detected by gamma scintigraphy.Results: Set-up A, ventilation in volume-controlled mode (VCV) via an ET: Delivered dose (1.61 ± 0.41 ml), nebulization time 10.13 ± 1.71 min. Set-up A, pressure-controlled ventilation (PCV), via a DLT: Delivered dose (1.33 ± 0.88 ml), nebulization time 13.27 ± 2.58 min. Set-up B, VCV mode via an ET: Delivered dose (1.57 ± 0.44 ml), nebulization time (25.9 ± 3.8 min). Set-up B, PCV mode, via a DLT: Delivered dose (1.3 ± 0.17 ml), nebulization time (25.6 ± 4.0 min). Set-up B did not yield a significantly higher output (p 0.05), but the nebulization time was significantly longer (p?> 0.05) compared with set-up A.Conclusion: Set-ups which involve connecting the nebulizer directly to an ET or a DLT exhibit sufficient output of aerosol and short nebulization times.
机译:摘要:伊洛前列素的气雾剂递送是一种有前途的治疗方法。这项研究的目的是确定在不同气管导管尖端不同通风设置下的超声雾化器的输出。方法:在设置A中,将超声雾化器直接连接到气管导管。在设置B中,将雾化器并入呼吸机回路的吸气支管中。旁路装置允许选择性地引导从模型肺排出的呼气。通过标准气管插管(ET)和双腔管(DLT)使测试肺通气。雾化器装有5 ml Tc-99m 0.9%NaCl溶液。雾化后,通过伽玛闪烁显像检查发现放射性的分布。结果:装置A,通过ET以体积控制模式(VCV)进行通气:给药剂量(1.61±0.41 ml),雾化时间10.13±1.71分钟。设置A,通过DLT进行的压力控制通气(PCV):输送剂量(1.33±0.88 ml),雾化时间13.27±2.58分钟。设置B,通过ET的VCV模式:输送剂量(1.57±0.44 ml),雾化时间(25.9±3.8分钟)。设置B,通过DLT的PCV模式:输送剂量(1.3±0.17 ml),雾化时间(25.6±4.0分钟)。装置B的输出没有显着提高(p 0.05),但是雾化时间比装置A的要长得多(p?> 0.05)。结论:涉及将雾化器直接连接到ET的装置或DLT表现出足够的气溶胶输出和较短的雾化时间。

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