氧合器
人工肺
体外膜肺氧合
膜式氧合器
生物医学工程
材料科学
充氧
微流控
扩散器(光学)
机械通风
氧气
麻醉
医学
化学
纳米技术
体外循环
光源
物理
光学
有机化学
作者
Mohammadhossein Dabaghi,Gerhard Fusch,Neda Saraei,Niels Rochow,John L. Brash,Christoph Fusch,P. Ravi Selvaganapathy
出处
期刊:Biomicrofluidics
[American Institute of Physics]
日期:2018-07-01
卷期号:12 (4)
被引量:45
摘要
Preterm neonates suffering from respiratory distress syndrome require assistive support in the form of mechanical ventilation or extracorporeal membrane oxygenation, which may lead to long-term complications or even death. Here, we describe a high performance artificial placenta type microfluidic oxygenator, termed as a double-sided single oxygenator unit (dsSOU), which combines microwire stainless-steel mesh reinforced gas permeable membranes on both sides of a microchannel network, thereby significantly reducing the diffusional resistance to oxygen uptake as compared to the previous single-sided oxygenator designs. The new oxygenator is designed to be operated in a pumpless manner, perfused solely due to the arterio-venous pressure difference in a neonate and oxygenate blood through exposure directly to ambient atmosphere without any air or oxygen pumping. The best performing dsSOUs showed up to ∼343% improvement in oxygen transfer compared to a single-sided SOU (ssSOU) with the same height. Later, the dsSOUs were optimized and integrated to build a lung assist device (LAD) that could support the oxygenation needs for a 1–2 kg neonate under clinically relevant conditions for the artificial placenta, namely, flow rates ranging from 10 to 60 ml/min and a pressure drop of 10–60 mmHg. The LAD provided an oxygen uptake of 0.78–2.86 ml/min, which corresponded to the increase in oxygen saturation from 57 ± 1% to 93%–100%, under pure oxygen environment. This microfluidic lung assist device combines elegant design with new microfabrication methods to develop a pumpless, microfluidic blood oxygenator that is capable of supporting 30% of the oxygen needs of a pre-term neonate.
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