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治疗COVID-19的助手,医用呼吸机,需要半导体器件才能发挥效用

由  Steven Dean 发布  - 2020-04-09 

在我写这篇博客时,像世界上大多数人一样被隔离在家庭办公室工作。我趁这安静时花时间写作,因为在家中很少有安静的时候。我和妻子Kathy在照顾孙子Charlie,而Charlie的妈妈是亚利桑那州当地一家医院重症监护室的护士。我们遵从亚利桑那州全州范围内的“留在家中”的命令,从某种角度看来,照看孙子好像是我们违背了该命令。噢,我们没有。目前,Charlie的妈妈是一名资源护士,负责护理31名2019冠状病毒(COVID-19)患者,其中11名依赖医用呼吸机,这是一种救生技术,不幸的是,在这流行病期间,呼吸机在全球短缺。

COVID-19住院人数的迅速增加给全球呼吸机库存造成了前所未有的压力。我们公司安森美半导体及业务被美国国土安全部视为必不可少的重要的基础设施,因为我司是半导体器件供应商之一,而半导体器件是医疗设备制造商供应链中的关键器件。我司的产品用于各种医疗设备,包括帮助COVID-19重症患者维持呼吸的呼吸机。对于不熟悉医用呼吸机的人,如果患者不能自行呼吸,呼吸机会使空气进出肺部,应用或用例可能相当广泛。通常,这机器会推动加湿和加热的空气及补充的氧气进入肺部。这设备用于重症监护室、急诊室、救护车(即急救情况)和家中。

在此我谈谈我和我的家人如何受到COVID-19全球大流行的影响以及安森美半导体的救生医疗技术的重要性。

 

 

在医用呼吸机系统中,复杂性可能有很大差异,但常见的变量有:

  • 在吸气期间(或阶段)呼吸机输送的氧气的测量
  • 每分钟呼吸速率
  • 潮气量,即每次呼吸的量
  • 敏感性,或者需要呼吸机进行多少吸气或触发努力才能识别患者的吸入尝试。触发可防止“机械呼吸”或呼吸机启动的呼吸
  • 峰值流量或呼吸流量

安森美半导体的专家团队竭尽所能提供高级系统架构用于医用呼吸机。让我们深入探究我们的器件可提供给这些救生设备的众多功能。

 

呼吸机高级系统架构

上面显示的架构能控制一个高性能无刷直流(BLDC)气泵(或使用多个BLDC驱动器来控制更多),这是每个医用呼吸机的“心脏”。即使在客户提案中仅显示三种阀门类型,但最终客户应用设备中实现的每个阀门驱动模块可同时驱动多达六个阀门。

对于常用的备用电池,我们的多节电池充电器是很好的方案,使每个电池保持在充满电的状态,以便在需要时能供电。由于许多制造商都在使用多电池设置,因此我们的方案可以通过添加更多的电池控制器扩展到像制造商实施那样多的热插拔电池。

此外,我们提供多个选项,包括低功耗蓝牙Wi-FiSub-GHz无线电,用于联接到外部数据系统和主机。支持语音用户接口(VUI),以及警报系统,针对重要事件,带有扬声器功放。

最后,联接方案还包括多个USB端口,用于连接外部驱动器、语音识别硬件、带有显示驱动的内部显示器输出、背光驱动器和可用于从外部投影触摸屏的高清多媒体接口(HDMI)输出端口。

支持的许多器件都符合车规认证,这一好处在医疗设备制造界日益流行。这些汽车级器件通常提供更高的耐用性和扩展的工作温度范围,这些特性和能力对医疗行业具有吸引力,并具有诊断功能和故障保护功能以确保安全。

安森美半导体提供技术和方案,携手客户和合作伙伴,以创新的半导体方案改善生活。我们很高兴我司产品在这段时间内为挽救生命的医疗技术做出贡献,并希望我们的半导体器件继续在所有行业中发挥作用。

有关呼吸机框图的更详细的解说,请观看视频

 

标签:Medical
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