CN103338807A - 自动的流体输送系统及方法 - Google Patents
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Abstract
本发明公开了一种自动的流体输送系统和方法。该系统包括膨胀管,流量控制器,以及流体流量调节模块。该流体流量调节模块可用于检测该膨胀管中的压力降和调节该流量控制器,以在吸入时提供流过该膨胀管的一定量的流体。
Description
相关申请的交叉引用
本申请要求享有于2010年8月10日申请的、申请号为6137241的美国临时专利申请的优先权,该临时专利申请的内容引入至此作为参考。
背景技术
本发明总的来说涉及流体系统,尤其涉及一种自动化的流体输送系统。
有些人受益于补充流体输送系统的使用。例如,为了维持血液中生理上充足的氧饱和度,患有慢性阻塞性肺病(COPD),或其他肺部功能不全的人,可能需要补充氧气,这些氧气通常来源于一个压缩的氧气瓶。补充氧气输送通常包括一个连接一个罐子的管路和一个用于延长时间的压力调节器。其他的,例如,运动员,飞机驾驶员,在高海拔山区的旅行者,因为劳累或过低的环境氧气,可能需要暂时补充氧气。
一些传统的流体输送系统提供预定的氧气流给最终用户。传统的系统通常需要手动调节压缩氧气瓶上的压力调节器中的阀门。在该系统使用时,所提供氧气的流量是预定的、并且通常是不可调节的。通常情况下,所提供氧气的流量往往是被过高估计的,以避免给用户的氧气供应不足。然而,这是浪费氧气。
其它系统,被称为氧气管理系统,以脉冲形式给用户输送氧气。通过设置一个旋转开关,脉冲的长度和振幅可手动确定。因此,每个脉冲的氧气量保持恒定,直至该开关被重新调节。
可知的是,基于跟踪用户的呼吸频率来输送氧脉冲给用户和基于过去呼吸的重复率来自动调节所输送氧气的量。这种技术依赖于过去的数据来预测以后呼吸所需要的氧气量。
可以看出,需要提供一种能够实时地提供即时最佳的流量的系统和方法,同时该系统和方法可以最大限度地减少氧气不必要的浪费。
发明内容
本发明的一方面,给用户提供流体的系统包括膨胀管,连接该膨胀管的流量控制器,用于控制流过该膨胀管的流体流量,和连接该膨胀管和该流量控制器的流体流量调节模块。该模块用于在一个单一的吸入气体期间测量该膨胀管中的压力变化,以及在吸入时,基于测量出的压力变化,控制该流量控制器以通过该膨胀管供应最佳量的流体。
本发明的另一方面,给用户提供氧气的系统包括膨胀管,连接在氧气源和用户之间,以提供一定量的氧气给用户,流量控制器,连接该膨胀管,用于控制流过该膨胀管的氧气量,压力传感器,连接位于流量控制器和用户之间的膨胀管,以及微控制器,连接该压力传感器。该微控制器用于接收压力传感器提供的压力信号,基于第一压力信号检测来自用户的呼吸事件的开始,基于第二压力信号确定该用户所需的氧气量,以及基于该第二压力信号控制流量控制器以调节给用户的氧气量。该压力信号从管中的压力降检测到。
本发明的又一方面,给用户提供氧气的方法可以包括检测在连接至用户的管中的第一呼吸事件的开始,在一个预定的时间段内分析管中的压力变化大小,基于分析出的压力变化大小,确定在第一呼吸事件时用户所需要的氧气量,以及供应所确定的氧气量给用户。
参考下面的附图、描述和权利要求,可更好的理解本发明的这些和其它的特征、方面和优势。
附图说明
图1是本发明实施例提供一种自动化的氧气输送系统的方框图;
图2是本发明实施例提供的一个电路的示意图;
图3是本发明实施例提供的方法中的步骤的流程图;以及
图4是本发明实施例提供的呼吸事件时间图。
具体实施方式
下面的详细描述是实施本发明实施例的目前最佳的预期的方式。该描述不应该作为一种限制,而仅仅只是用于阐释本发明的一般原理,因为本发明的范围由附上的权利要求书进行了最好的规定。
下面描述的各种发明特征,每一个特征可以彼此独立地使用或者与其它特征进行组合。然而,任意一个发明特征可能不能解决上面讨论的任一问题或仅仅可以解决上面讨论的一个问题。进一步的,下面描述的任一特征可能不能完全解决上面讨论的一个或多个问题。
概括地说,本发明的实施例主要提供一种自动化的系统,该系统基于所测得的用户需求提供最佳注氧。一方面,该系统可以在呼吸事件需要的基础上给人或其他动物供应补充的氧气,该呼吸时间也被称作一个呼吸周期。一个呼吸周期可包括吸气阶段和呼气阶段。通过测量和分析每次呼吸的压力特性,氧气需求可以基于一呼一吸估计出。满足该氧气要求的氧气流量需求则可以由微控制器预见到(例如计算出)。然后,在合适的时间和以合适的量进行注氧,以满足所测得的吸气期间的当前需求。因此,一方面,基于吸气的检测,在相同的检测到的吸气期间,可以供应最适量的流体。该系统可以动态地和连续地响应用户不同的氧气需求。
在一种可能的实施例中,可能期望维持血氧饱和度在一个生理上合适的范围内。氧气流量可以基于血氧传感器实时测量的结果进行调整。这样的一种传感器可以是脉动血氧计。血氧计的输入可以用于结合下面描述的吸气压力测量技术。
另一方面,氧气需求可以通过测量每次呼气的二氧化碳水平来确定。这种测量在例如医院环境中是有用的,因为在此环境中需要准确第检测病人。
在一些可能的实施例中,该系统可以由电池供电和便携式的,其具有一些元件组装在一块电路板上,以便于即插即用连接到用户和便捷的流体源。
参考图1,图1示意了一个给用户99供应氧气的自动化系统100(一般也称为系统)。该系统100包括流量控制器120,管子125和流体流量调节模块175。该系统100的供电可以由电源199提供。例如,该电源199可以是可再充电电池。然而,如图所示,当电源199直接连接至该流体流量调节模块175,应该理解的是,其它示范性实施例可以包括设置在该模块175外部的电源199,例如,通过利用传统的变压器插入墙上的插座。
在一个示范性实施例中,该管子125可以连接至可调控的流体源110,并用于输送流体给用户99。该管子125可以是膨胀管,例如,导管。该流体源110可以是,例如,小型便捷的压缩氧气瓶,并普遍用于其它补充氧气系统。该流量控制器120可以连接到该管子125,以及设置在第一管段125a和第二管段125b之间。该流量控制器120可以包括(图未示)一个或多个开启/关闭气动流量阀、比例流量阀、质体流动控制器,或一些其它装置,用于根据电子控制信号来控制流体流量。该第一管段125a可位于所述流体源110和流量控制器120之间。该第二管段125b可位于流量控制器120和用户99之间。一个旁通阀160也可以连接在所述管段125a和125b之间,并且在系统100的正常运行期间,该旁通阀160用于阻止流体流过流量控制器120。在所述自动化系统100发生故障的情况下,则流体流体被阻止从所述氧气源110流向用户99。然后,可以手动开启该旁通阀160,从而给用户99提供第二条流量路径。
该流体流量调节模块175可以连接流量控制器120和第二管段125b。在一个示范性实施例中,该流体调节模块175可以包括压力传感器140、微控制器150、血氧传感器170,以及二氧化碳传感器180。在一些实施例中,该流体流量调节模块175还可以包括通信端口185,该通信端口185用于连接监控装置/通信装置190,例如个人计算机或数据记录仪。该微控制器150,压力传感器140,通信端口185和多个辅助电路130可以组装到一个电路板组件155上。
该微控制器150确定和控制供应给用户99的流体量。该微控制器150可以连接到所述流量控制器120。该微控制器150可以是,例如Microchip PIC 16F88模型。该微控制器150可以存储用于控制压力和其它系统数据测量的操作软件,以及控制所述流量控制器120按照需要供应最适量的流体。该微控制器150也可以连接至所述压力传感器140。
该微控制器150可以连续分析来自压力传感器140的电气输出,进而检测呼吸事件和计算应当供应给用户99的最适合的流体量。该压力传感器140可以用于连续感应第二管段125b中的压力大小。该压力传感器140可以是,例如压差传感器。压力传感器140可以用于基于在第二管段125b中检测到的压力变化,提供压力信号给所述微控制器150。该压力传感器140的一个端口可以暴露于周围环境。另一个端口可以与该第二管段125b连通。因此,一方面,检测到的压力可以是周围环境和第二管段125b内部之间的压力差。另一方面,检测到的压力可以是第二管段125b内部的压力大小。又一方面,可测到的压力检测可以在一个或多个时间间隔期间进行。
所述血氧传感器170和二氧化碳传感器180可以在供应氧气给用户99的实施例中提供进一步的准确性。血氧传感器170可以粘附在用户99的合适的位置上。例如,血氧传感器170可以装在用户99的指尖或耳垂上。血氧传感器170可以连接微控制器150,用于利用脉动血氧计测量血氧饱和度(SPO2)。SPO2数据可以传送给微控制器150,进而用于结合吸气压力计算在呼吸事件中供应给用户的氧气量。所述二氧化碳传感器180可以连接微控制器150,用于测量用户99的呼气阶段中存在的二氧化碳。呼气阶段中存在的二氧化碳的量可以提供给该微控制器150,用于确定在随后的吸气阶段中输送给用户99的适当的注氧量。
图2示出了一个示范性实施例的电路板组件155的电路原理图。所示出的电路板组件155是一个实施例,其并没有包含图1中的血氧传感器170和二氧化碳传感器180,但应该理解的是,这两个元件应该包含或配置于相应的适应利用它们的实施例中。也应该理解的是,本图中的辅助电路130可以包括没有被另一参考号码指定的所有功能。该辅助电路130可以用于调节所述电路板组件155的电源供应,还可用于调节放大器,决定和影响压力传感器140和微控制器150之间的模拟信号的准确测量,用于连接通信端口185到可选的外部设备(例如,图1中示出的监控装置/通信装置190或其它装置),用于提供警示电路,以及提供其它的系统监控电路。
参考图1和图3,其示出了在系统100中的给用户99供应流体的示例性方法300。在第二管段125b中执行连续的压力测量310。第一压力测量值(ΔPa)可以是基于环境压力(Pamb)和第二管段125b中的压力(Ptube)之间的压力差值。该环境压力(Pamb)可以是,例如检测到的第二管段125b的外部的压力。该微控制器150可以判断320测量出的压力(ΔPa)是否大于阈值压力P*。如果否,该方法300则返回所述执行连续的压力测量310的步骤。如果是,则执行第二压力测量(ΔPb)330的步骤。
基于微控制器150检测到的在用户99开始吸气时的第二管段125b中的压力降,检测340呼吸事件的开始。压力降可以是基于第二压力测量值(ΔPb)大于第一压力测量值(ΔPa)。微控制器150可以分析350来自压力传感器140的多个额外的压力信号。例如,微控制器可以分析周围环境和第二管段125b中的压力之间的多个压力差测量值(ΔP1,ΔP2,ΔP3,…,ΔPn)。压力信号也可以超过一预定时间跨度的在多个时间点(t1,t2,t3,…,tn)上被分析;例如,从呼吸时间开始的30毫秒。确定氧气的初始量360。在提供连续的流体流量的示范性实施例中,输送的氧气量可以基于多个压力差测量值(ΔP1,ΔP2,ΔP3,…,ΔPn)的函数g。对于提供脉冲流体流量的示范性实施例,输送的氧气量可以基于多个压力差测量值(ΔP1,ΔP2,ΔP3,…,ΔPn)的函数h。一方面,在吸气的早期,已确定的流体量可以在检测到的呼吸事件期间输送350给用户99。
在利用血氧测量值370的实施例中,该血氧传感器170可以测量372血氧饱和度数据。基于所测得372的血氧饱和度数据,微控制器150可以确定或多或少多少初始确定360的氧气,如连续流或脉冲流的氧气,应该供应给用户99。包含生理测量例如血氧可以允许在系统100中闭环模式操作。因此,最佳的氧气量可以基于系统100中测量出的压力,并可以考虑测量出的血氧,并相应地调整输送376给用户99的所计算出的注入大小,以使实际的血氧保持在生理上适当的范围内。该闭环适当的范围可以从没有补充的氧气被输送,假如此时用户的血氧已维持在生理上适当的限度内,到用户的血氧正在下降的情况下额外的附加的氧气被输送。这提供了优化的操作,因为,氧气不需要时被保存起来,而在用户的测量出的血氧显示额外需求时能够提供额外的氧气。
对于利用二氧化碳描计术模式380的示范性实施例,二氧化碳检测器180可以检测380用户99的呼气中存在多少二氧化碳。检测出的二氧化碳量的检测382可以被微控制器150利用,以确定384在随后的吸气中或检测到的呼吸事件中需要供应386多少流体(连续流体或脉冲流体)。
现在参考图4,是本发明实施例示意的呼吸事件时间图400。压力传感器可以测量管中的压力。通过管子吸入流体的用户可以在管中造成压力降。可以理解的是,本发明的各方面提供流体需求的检测和计算,以及在呼吸周期的吸入阶段的早期供应需要的流体量。下面标号的几个点表示在呼吸事件中压力变化的事件。在点410,代表阈值压力变化。阈值压力变化可以是,例如,接近0.08英寸的水。阈值压力变化的检测可以标记检测到吸气(呼吸事件)的开始。随后的压力测量从点410到点420需要花费预定的时间间隔。吸入压力特性可以基于点410处测量的压力和点410至点420之间包括点420测量的任意一个随后的压力信号而确定。这样测量出的吸入压力特性可以用于在点430确定,在接下来的接近5毫秒的时间内输送给用户最佳的流体量。在确定流体量的时间段之后,在点440,确定的流体量可以在检测到呼吸事件后接近35至50毫秒后通过系统输送给用户。在点450,在从呼吸事件开始的接近1000毫秒的时间后,用户达到吸入的高峰(在图中描绘的是管中最低点的压力)。应该理解的是,在呼吸事件的开始和峰值吸入之间的压力曲线的形状、幅度和时间段可以基于多个因素包括用户的努力状态而每次呼吸发生变化。
当然,应该理解,前述关于本发明的示范性实施例和改变可以在不脱离下面的权利要求中阐释的本发明的精神和范围下做出。
Claims (17)
1.一种给用户供应流体的系统,包括:
膨胀管;
流量控制器,连接所述膨胀管,用于控制流经所述膨胀管的流体流量;以及
流体流量调节模块,连接所述膨胀管和所述流量控制器,所述模块用于在一个单一的吸入气体期间测量所述膨胀管中的压力变化,以及基于所述吸气时测量出的所述压力变化控制所述流量控制器通过所述膨胀管供应最佳量的所述流体。
2.如权利要求1所述的系统,其中,所述流体流量调节模块包括微控制器,所述微控制器用于基于所述吸气时测量出的所述压力变化,确定通过所述流量控制器输送所述流体的最佳量。
3.如权利要求2所述的系统,其中,所述最佳量的流体是注氧。
4.如权利要求1所述的系统,其中,所述膨胀管为插管。
5.一种供应氧气给用户的系统,包括:
膨胀管,连接于氧气源和用户之间,用于供应一定量的氧气给所述用户;
流量控制器,连接所述膨胀管,用于控制流经所述膨胀管的氧气量;
压力传感器,连接位于所述流量控制器和所述用户之间的所述膨胀管;以及
微控制器,连接所述压力传感器,所述微控制器用于:
接收所述压力传感器提供的压力信号,其中,所述压力信号从所述膨胀管中的压力差检测到;
基于第一压力信号,检测来自用户的呼吸事件的开始;
基于第二压力信号,确定用户所需的氧气量,以及
基于所述第二压力信号,控制所述流量控制器以调节输送给用户的氧气流量。
6.如权利要求5所述的系统,其中,所述微控制器用于控制在呼吸事件期间控制所述流量控制器输送确定的氧气量。
7.如权利要求5所述的系统,包括血氧传感器,所述血氧传感器连接至所述微控制器,并依附在所述用户上,所述微控制器用于基于由所述血氧传感器测量出的测量值确定所需的氧气量。
8.如权利要求5所述的系统,包括连接在所述氧气源和所述用户之间的旁通阀,在所述系统发生故障时,所述旁通阀用于允许连续的氧气流向所述用户。
9.如权利要求5所述的系统,包括连接所述微控制器的二氧化碳传感器,所述微控制器用于基于由所述二氧化碳传感器测量出的测量值,确定在所述呼吸事件随后的吸气期间输送的第二氧气量。
10.一种给用户供应氧气的方法,包括:
检测在连接至所述用户的管中的第一呼吸事件的开始;
在预定的时间段内,分析所述管中的压力变化大小;
基于所述分析出的压力变化大小,确定在所述第一呼吸事件期间用户所需的氧气量;以及
供应所述确定的氧气量给所述用户。
11.如权利要求10所述的方法,其中,检测所述第一呼吸事件的开始包括检测所述管中的压力降大于一预定的阈值压力。
12.如权利要求10所述的方法,其中,在所述压力变化发生在所述呼吸事件的吸气阶段。
13.如权利要求10所述的方法,其中,供应所述确定的氧气量给所述用户发生在所述第一呼吸事件的吸入阶段早期。
14.如权利要求10所述的方法,其中,供应所述确定的氧气量给所述用户发生在从检测到所述呼吸事件的开始的预定时间内。
15.如权利要求10所述的方法,其中,所分析的压力变化的大小是基于环境压力和所述管中压力的差值。
16.如权利要求10所述的方法,包括测量所述用户的血氧水平,其中,确定所需的氧气量部分取决于所测量出的所述血氧水平。
17.如权利要求10所述的方法,包括:
在所述第一呼吸事件的呼气阶段,测量所述用户的二氧化碳水平;以及
确定在第二呼吸事件的所述吸气阶段供应给所述用户的氧气量部分取决于所测量出的所述二氧化碳水平,其中,所述第二呼吸事件发生在所述第一呼吸事件的所述呼气阶段之后。
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CN112584886A (zh) * | 2018-08-24 | 2021-03-30 | 医疗模拟器械股份公司 | 用于在医疗设备中操作执行元件的方法以及这方面的装置 |
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EP2605817A4 (en) | 2014-09-17 |
US20130152933A1 (en) | 2013-06-20 |
WO2012021557A2 (en) | 2012-02-16 |
WO2012021557A3 (en) | 2012-06-07 |
CN103338807B (zh) | 2016-06-29 |
EP2605817A2 (en) | 2013-06-26 |
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