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从小体积的呼出呼吸中采集高度病毒样本的超快速采集,用于呼吸系统病毒监测
Weihao Li1, Han Gao1, Mengqing Cheng1
1State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, No. 2, Nanjing 211189, Jiulonghu, People's Republic of China.
Analytical chemistry
|March 3, 2026
概括
一种新的相变干墙旋风采样器 (PDC-sampler) 快速捕获和集中来自呼吸的空气传播呼吸道病毒. 这种自动化系统能够快速,灵敏地检测像SARS-CoV-2这样的病毒,用于疾病监测.
科学领域:
- 生物医学工程 生物医学工程
- 呼吸道病毒学 呼吸道病毒学
- 诊断技术 诊断技术的使用
背景情况:
- 呼吸道病毒爆发的有效早期诊断和控制依赖于从呼出的呼吸中快速,敏感的检测.
- 目前的方法面临的挑战是病毒气溶捕获效率低和样品稀释,阻碍了点的护理应用.
研究的目的:
- 开发和验证一个完全自动化的,非侵入性的系统,以有效地捕获和集中来自呼气中的空气传播呼吸道病毒.
- 为了改善公共卫生监测,使病毒病原体的快速,灵敏和现场部署的检测成为可能.
主要方法:
- 换相干墙旋风采样器 (PDC-sampler) 集成了换相凝结与CFD优化的旋风分离器,以捕获病毒气溶 (<5μm).
- 该系统将气溶凝结成微滴,提高捕获效率,并产生小体积,高度的液体样本.
- 采集的样本直接合到微流体芯片上进行芯片上的病毒RNA溶解,然后使用数字滴滴PCR (ddPCR) 进行检测.
主要成果:
- PDC采样器实现了病毒气溶的高捕获效率,在10秒内从一次呼气 (∼0.5L) 中将它们集中到一个小体积 (∼20μL) 中.
- 集成的样本到lysate工作流与核酸检测方法兼容.
- 结合ddPCR,该系统展示了超灵敏的检测极限,每次呼出5-9个副本的SARS-CoV-2和H1N1流感.
结论:
- PDC-sampler为呼吸道病毒检测提供了超快,小体积,样品到结果的工作流.
- 这项技术提供了一个可扩展的,现场部署的解决方案,用于点诊断和实时呼吸道病毒监测.
- 该系统通过提高捕获效率和减少样品处理时间,显著改进了现有方法.
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