CN109069711A - 用于在负压力治疗***中驱动负压源的***和方法 - Google Patents
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Abstract
本发明公开了负压伤口治疗***和方法的实施例。在一个实施例中,一种设备包括负压源、耦合电路、驱动电路和控制器。所述驱动电路经由所述耦合电路将驱动信号供应给所述负压源,使得所述负压源向伤口敷料提供负压。所述耦合电路包括感抗,所述感抗限制所述驱动信号随时间的变化率。所述控制器控制由所述驱动电路供应的所述驱动信号。
Description
相关申请的交叉引用
本申请要求2016年5月3日提交的美国临时申请号62/331,109和2017年3月31日提交的美国临时申请号62/479,592的优先权;它们的公开内容据此整体以引用方式并入。
背景技术
本公开的实施例涉及用于以负压或减小的压力疗法或局部负压(TNP)疗法敷料并处理伤口的方法和设备。具体而言但不加限制,本文中公开的实施例涉及负压治疗装置、用于控制TNP***的操作的方法以及使用TNP***的方法。
发明内容
在一些实施例中,公开了一种用于向伤口施加负压的设备。该设备可包括负压源、耦合电路、驱动电路和控制器。负压源可以经由流体流动路径将负压提供至设置在伤口上的伤口敷料。负压源可包括致动器,该致动器被配置成将电能转换为机械能。耦合电路可以包括感抗。驱动电路可经由耦合电路将驱动信号供应至致动器,使得负压源提供负压。控制器可以控制驱动电路供应的驱动信号。
前一段落所述的设备可包括一个或多个以下特征:致动器可以通过将电能转换成机械能而不是将电能转换成磁能来生成负压。负压源可包括压电泵,并且致动器可包括压电换能器。负压源可包括微型泵。所述设备还可以包括伤口敷料,并且负压源可以设置在伤口敷料上或伤口敷料内。耦合电路可以限制从驱动电路供应给致动器的驱动信号随时间的变化率。在1kHz的操作频率下,感抗可以大于5mΩ。耦合电路可以包括电感器,该电感器串联电耦合在驱动电路的输出与致动器的输入之间。电感器可以具有1μH与100μH之间的电感。电感器可以具有至少1A的最大额定电流。耦合电路可以包括在驱动电路的另一输出与致动器的另一输入之间串联电耦合的电短路。驱动电路可包括H-桥电路。控制器还可以将控制信号提供至驱动电路,并且控制器可以通过调节控制信号的脉冲宽度调制来控制驱动信号。驱动信号的幅值可小于50V。
本发明还公开了操作、使用或制造前两段所述的设备的方法。
在一些实施例中,公开了一种操作负压伤口治疗设备的方法。该方法可以包括:产生和输出控制信号;响应于控制信号激活多个开关;经由多个开关向负压源的致动器供应驱动信号;限制驱动信号随时间的变化率;以及响应于驱动信号,用负压源向伤口敷料供应负压。
前一段落的所述方法可包括一个或多个以下特征:限制随时间的变化率可包括使用感抗来限制随时间的变化率。负压可以通过将电能转换成机械能而不是将电能转换成磁能来供应。激活多个开关可以包括响应于控制信号激活多个开关的对。控制信号可以包括占空比为50%的方波。
附图说明
通过结合附图考虑下面的详细描述,本公开的特征和优点将变得显然,图中:
图1图示了根据一些实施例的负压治疗***。
图2A和图2B分别图示了根据一些实施例的负压治疗***(例如图1的负压治疗***)的侧视图和俯视图。
图3图示了根据一些实施例电源、控制电路和负压源以及控制电路的各部件之间的电通信路径的框图。
图4A和图4B图示了根据一些实施例的驱动电路的简化电路部件。
图4C图示了根据一些实施例的驱动电路的电路部件。
图5图示了根据一些实施例的耦合电路的电路部件。
图6图示了根据一些实施例可由负压治疗***执行的治疗控制过程。
具体实施方式
本公开涉及用于以减小的压力疗法或局部负压(TNP)疗法敷料并处理伤口的方法和设备。具体而言但不加限制,本公开的实施例涉及负压治疗设备、用于控制TNP***的操作的方法和使用TNP***的方法。所述方法和设备可包括或实施下面描述的特征的任何组合。
已知用于帮助人或动物的愈合过程的许多不同类型的伤口敷料。这些不同类型的伤口敷料包括许多不同类型的材料和层,例如,纱布、衬垫、泡沫垫或多层伤口敷料。TNP疗法有时也称作真空辅助闭合、负压伤口疗法或减压伤口疗法,其可能是用于促进伤口的愈合率的有益机制。这种疗法适用于宽范围的伤口,例如切口、开放性伤口和腹部伤口等。
TNP疗法可有助于通过减少组织水肿来闭合和愈合伤口;促进血液流动;刺激肉芽组织的形成;去除多余的渗出液,且可减少细菌负载(且因此减少伤口感染)。而且,TNP疗法可以允许伤口受到较少的外部干扰,促进更快速的愈合。
如本文所用,减压水平或负压水平(诸如-X mmHg)表示低于大气压的压力水平,它通常对应于760mmHg(或者1atm、29.93inHg、101.325kPa、14.696psi等)。因此,-X mmHg的负压值反映低于大气压X mmHg的压力,例如(760–X)mmHg的压力。此外,比-X mmHg“更少”或“更小”的负压对应于更接近大气压的压力(例如,-40mmHg比-60mmHg小)。比-X mmHg“更多”或“更大”的负压对应于更远离大气压的压力(例如,-80mmHg比-60mmHg大)。
概述
TNP设备的驱动电路可以经由TNP设备的耦合电路向TNP设备的负压源供应驱动信号(例如,电流和电压)。负压源可包括泵,如压电泵或微型泵。耦合电路可以具有感抗,该感抗限制由驱动电路供应给负压源的驱动信号随时间的变化率。有利地,在某些实施例中,具有这种构造的TNP设备可以比其他TNP设备消耗更少的功率来产生负压。
减压治疗***和方法
图1图示了根据一些实施例包括TNP设备11和伤口14的负压治疗***100。TNP设备11可以用来处理伤口14。TNP设备11可包括控制电路12A、存储器12B、负压源12C、用户界面12D、电源12E、第一压力传感器12F和第二压力传感器12G,他们都被配置成相互电通信。另外,TNP设备11可包括伤口敷料13。电源12E可将功率提供至TNP设备11的一个或多个部件。
控制电路12A、存储器装置12B、负压源12C、用户界面12D、电源12E、第一压力传感器12F和第二压力传感器12G中的一个或多个可以与伤口敷料13整合、作为一部分并入该伤口敷料、附接到该伤口敷料或者设置在该伤口敷料中。TNP设备11因此可以认为使其控制电子器件和泵在伤口敷料13上,而不是与伤口敷料13分开。
控制电路12A可包括一个或多个控制器(例如微控制器或微处理器)、激活电路、升压转换器、电流限制器、反馈调理电路和H-桥逆变器。控制电路12A可以至少根据存储在存储器装置12B中的指令控制TNP设备11的一个或多个其他部件的操作。控制电路12A例如可以控制负压源12C的操作和负压的供应。
负压源12C可包括泵,例如但不限于旋转隔膜泵或其他隔膜泵,压电泵,蠕动泵,活塞泵,旋转叶片泵,液体环泵,旋涡泵,由压电换能器操作的泵或者任何其他适合的泵或微型泵或前述的任何组合。泵可包括由能源驱动的致动器,所述能源例如电能、机械能等。例如,致动器可以是电动机,压电换能器,音圈致动器,电活性聚合物,形状记忆合金,梳状驱动器,液压电机,气动致动器,螺旋千斤顶,伺服机构,电磁致动器,步进电机,柱塞,燃烧发动机等。在一些实施例中,负压源12C可以通过将电能转换成机械能而不是将电能转换成磁能来供应负压。在此类实施例中,负压源12C在电耦合到控制电路12A的一个或多个其他部件时可具有与负压源12C通过将电能转换成磁能然后转换成机械能来供应负压的情况不同的影响。
用户界面12D可包括接收用户输入或者将用户输出提供至患者或护理人员的一个或多个元件。接收用户输入的一个或多个元件可包括按钮、开关、拨号盘、触摸屏等,提供用户输出的一个或多个元件可包括发光二极管(LED)或显示器的一个或多个像素的激活或扬声器等的激活。在一个实例中,用户界面12D可包括接收用户输入(例如负压激活或去激活输入)的开关和指示TNP设备11的操作状态(例如工作正常,处于故障状态或等待用户输入)的两个LED。
第一压力传感器12F可以用来监测伤口敷料13下面的压力,例如,连接负压源12C和伤口14的流体流动路径中的压力,伤口14处的压力或者负压源12C中的压力。第二压力传感器12G可以用来监测伤口敷料13外部的压力。伤口敷料外部的压力可以是大气压;然而,大气压可根据例如使用的高度或可以使用TNP设备11的加压环境而变化。
控制电路12A可以根据至少由第一压力传感器12F监测的压力和由第二压力传感器12G监测的压力之间的比较,控制负压源12C的负压供应。
伤口敷料13可包括伤口接触层、隔件层和吸收层。伤口接触层可与伤口14接触。伤口接触层可以在面向患者侧上包括粘合剂,用于将敷料固定到伤口14周围皮肤;或者在顶侧上包括粘合剂,用于将伤口接触层固定到伤口敷料13的覆盖层或其他层。在操作中,伤口接触层可以提供单向流动,以便有利于从伤口移除渗出液,同时阻挡或基本上防止渗出液返回伤口14。隔件层可有助于在伤口部位之上分配负压,并且有助于促进伤口渗出液与流体输送到伤口敷料13中。此外,吸收层可吸收并保持从伤口14吸出的渗出液。
控制电路12A可监测负压源12C的活动,这可包括监测负压源12C的占空比(例如,负压源的致动器的占空比)。如本文中所用,“占空比”可以反映负压源12C在某时段上活动或运行的时间量。换言之,占空比可反映负压源12C处于活动状态的时间,作为考虑中的总时间的一部分。占空比测量可以反映负压源12C的活动水平。例如,占空比可指示负压源12C运行正常,工作吃力,工作极其吃力等。而且,占空比测量,例如周期占空比测量可反映各种操作状态,例如泄露存在或严重性,从伤口吸出的流体流速(例如空气、液体或固体渗出物)等。基于占空比测量,例如通过将测量的占空比与(例如校准中确定的)一组阈值比较,控制器可执行或被编程为执行对***的操作进行控制的算法或逻辑。例如,占空比测量可指示高泄露的存在,控制电路12A可以被编程为将此状态指示给用户(例如患者、护理人员或医师)或者暂时中断或暂停负压源的操作以便节约功率。
当TNP设备11可以用来处理伤口14时,伤口敷料13可以在伤口13周围及在伤口敷料13下面产生基本密封或封装的空间,第一压力传感器12F可周期性或连续地测量或监测在此空间中的压力水平。控制电路12A可以将此空间中的压力水平控制在第一负压设定点极限和至少第二负压设定点极限之间。在一些情况下,第一设定点极限可以近似为–70mmHg,或者从近似–60mmHg或者更小到近似–80mmHg或者更大。在一些情况下,第二设定点极限可以近似为–90mmHg,或者从近似–80mmHg或者更小到近似–100mmHg或者更大。
图2A图示了负压治疗***200的侧视图,而图2B图示了根据一些实施例的负压治疗***200的俯视图。负压治疗***200可以是负压治疗***100的示例实施方式。
在负压治疗***200中,TNP设备11的伤口敷料13显示为附接到伤口14。箭头描绘了通过伤口敷料13的空气流动和来自伤口14的伤口渗出液。TNP设备11可包括排气26和部件区25,例如用于TNP设备11的部件(例如一个或多个控制电路12A、存储器装置12B、负压源12C、用户界面12D、电源12E、第一压力传感器12F和第二压力传感器12G)的部件外壳或储存区。
负压治疗***200的用户界面12D可包括开关21(例如圆顶开关(dome switch))、第一指示器23(例如第一LED)和第二指示器24(例如第二LED)。开关21可接收负压激活或去激活用户输入(例如响应于在例如从0.5秒到5秒的时段按压开关21,接收激活或去激活用户输入)。第一指示器23和第二指示器24可以指示如工作正常,处于故障状态或等待用户输入的操作状态。在一些实施方式中,开关21可以耦合到负压源12C或控制电路12A的电源连接,或者负压源12C或控制电路12A的启用信号,以激活或去激活负压的供应或者禁止负压的供应。
负压治疗***200的伤口敷料13的部件部分图示为包括气锁层27、吸收层28和接触层29。气锁层27可以使空气流动。吸收层28可吸收伤口渗出液。接触层29可以是软的,且包括硅,并用来将TNP设备11耦合到患者。
图3图示了框图300,该框图描绘了电源12D、控制电路12A和负压源12C之间的示例电通信路径,以及控制电路12A的示例部件,这些部件包括控制器31、电流限制器32、驱动电路33、反馈调节器34和耦合电路35。图3具体示出了根据一些实施例可以如何使用控制器31来控制负压源12C的负压供应。
电源12D可包括一个或多个电源,例如电池(例如多个3V电池)或与主电源的连接,以为TNP设备11的一个或多个部件提供功率。例如,电源12D可以将电流或电压提供至电流限制器32。在一些实施方式中,由电源12D输出的电压可以为30V左右,例如29V±1V。电源12D可以另外包括例如升压转换器的电路,控制提供至电流限制器32的电流和电压。
电流限制器32可以用来将电流限制或钳制在最大电流水平,例如在100mA,250mA,466mA,500mA或者1A,以限制潜在的故障电流通过驱动电路33和负压源12C。在正常操作下(例如在大多数或一些情况下),电流限制器32可以不操作来限制电流或电压。
电流限制器32可以将电流和电压提供至驱动电路33。驱动电路33可包括由多个开关组成的H-桥电路。H桥可以被配置成作为H-桥逆变器操作。驱动电路33可通过反馈调节器34将反馈提供至控制器31。反馈调节器34可以用来例如在电流反馈信息提供至控制器31之前调理来自驱动电路33的电流反馈信息。在一个实例中,反馈调节器34可包括低通滤波器(其例如可包括有源电路部件),对由驱动电路33的一个或多个开关的切换引起的开关噪声进行滤波。在一些情况下,控制器31又可以基于反馈来控制驱动电路33的操作。
控制器31可以通过控制器31的一个或多个输出将一个或多个控制信号输出到驱动电路33的一个或多个输入,控制驱动电路33的操作且依次控制负压源12C的操作。例如,控制器31可以通过控制器31的第一输出O1将第一控制信号输出到驱动电路33的第一输入I1,通过控制器31的第二输出O2将第二控制信号输出到驱动电路33的第二输入I2。控制器31可以改变第一控制信号和第二控制信号的脉冲宽度调制(PWM),调节由驱动电路33提供至耦合电路35然后提供至负压源12C的电流和电压。在一些情况下,驱动电路33提供的电流或电压在本文中可称为驱动信号。
在一种实施方式中,驱动电路33可以包括H桥,并且控制器31可以生成第一控制信号和第二控制信号,以经由驱动电路33的第一输出O1和驱动电路33的第二输出O2使H桥输出具有方波(例如±3V、±5V、±10V、±15V、±20V、±25V、±30V或±40V)的驱动信号,该方波具有一定的频率(例如10kHz至32kHz、14kHz至28kHz、18kHz至24kHz、20KHz至22KHz或约21kHz)和占空比或比率(例如20%、30%、40%、45%、50%、55%、60%、70%或80%)。
驱动电路33可以通过经由耦合电路35向负压源12C(例如负压源12C的致动器)提供驱动信号来控制由负压源12C供应负压。驱动电路33例如可以通过驱动电路33的第一输出O1和第二输出O2将电流输出到耦合电路35的第一输入I1和耦合电路35的第二输入I2。耦合电路35又可以通过耦合电路35的第一输出O1和耦合电路35的第二输出O2将电流输出到负压源12C的第一输入I1和负压源12C的第二输入I2。由驱动电路33和耦合电路35输出的电流可以明显认为是由从驱动电路33流出(即通过驱动电路33的电流的源)或流入驱动电路33(即通过驱动电路33的电流的汇)的正电荷产生。
耦合电路35可以用来限制由驱动电路33供应至负压源12C的电流随时间的变化率或者限制负压源12C的第一输入I1和第二输入I2两端的电压随时间的变化率。在1kHz的操作频率下,耦合电路35可以具有大于1mΩ,5mΩ,10mΩ,50mΩ,100mΩ,500mΩ,750mΩ的感抗。在一些实施例中,耦合电路35可包括无源电路部件,且不包括有源电路部件,但在其他实施例中,耦合电路35可包括无源电路部件和有源电路部件中的一者或两者。
图4A和图4B图示了根据一些实施例的驱动电路33的示例简化电路部件。从图4A和图4B可看出,驱动电路33可以由至少四个开关组成,包括第一开关S1、第二开关S2、第三开关S3和第四开关S4,他们一起形成H-桥。第一开关S1和第四开关S4可以同时闭合,且第二开关S2和第三开关S3可以同时打开,如图4A中所示,以在第一方向上供应第一电流i1通过耦合电路35和负压源12C。第二开关S2和第三开关S3可以同时闭合,且第一开关S1和第四开关S4可以同时打开,如图4B中所示,以在第二方向上供应第二电流i2通过耦合电路35和负压源12C。第一方向可以与第二方向相反。
图4C图示了根据一些实施例的包括电阻器42的驱动电路33(在图示的实例中是H-桥)的示例电路部件。在图4C中所示的示例电路部件中,通过电阻器42的电流可以与通过耦合电路35和负压源12C(例如负压源12C的致动器)的电流相同或基本上相同。结果,提供至反馈调节器34的反馈例如可以是电阻器42两端的电压水平或电压降,其可以与通过电阻器42的电流以及通过耦合电路35和负压源12C的电流成比例。电阻器42因此可以用来测量电流的一个或多个性质,例如幅值,该电流经由耦合电路35例如经由类似关于图5描述的电感器52的耦合电路35的电感器馈送到负压源12C。如本发明中所描述,电阻器42可以耦合到低通滤波器。
图5图示了根据一些实施例的耦合电路35的示例电路部件。如从图5中可以看出,耦合电路35可包括(i)电感器52和(ii)电线或电短路54,所述电感器串联电耦合在驱动电路33的第一输出O1与负压源12C的第一输入I1之间,所述电线或电短路串联电耦合在驱动电路23的第二输出O2与负压源12C的第二输入I2之间。电感器可以具有范围从0.1μH到1000μH、1μH到100μH或3μH到10μH的电感或者大约7.5μH的电感。电感器可以具有大于0.25A、0.5A、0.75A、1A或1.25A的最大额定电流。电感器52可以用来抵抗为驱动负压源12C而供应的电压或电流的快速变化。
在另一实施例中,耦合电路35可包括(i)第一电线或第一电短路以及(ii)第二电线或第二电短路,所述第一电线或第一电短路串联电耦合在驱动电路33的第一输出O1与负压源12C的第一输入I1之间,所述第二电线或第二电短路串联电耦合在驱动电路33的第二输出O2与负压源12C的第二输入I2之间。
在又一实施例中,耦合电路35可包括(i)第一电线或第一电短路以及(ii)电感器(例如电感器52),所述第一电线或第一电短路串联电耦合在驱动电路33的第一输出O1与负压源12C的第一输入I1之间,所述电感器串联电耦合在驱动电路33的第二输出O2与负压源12C的第二输入I2之间。
在再一实施例中,耦合电路35可包括(i)第一电感器(例如电感器52)和(ii)第二电感器(例如电感器52),所述第一电感器串联电耦合在驱动电路33的第一输出O1与负压源12C的第一输入I1之间,所述第二电感器串联电耦合在驱动电路33的第二输出O2与负压源12C的第二输入I2之间。
在某些实施方式中,可代替一个或多个电感器或除了一个或多个电感器之外,使用一个或多个有源元件。
图6图示了根据一些实施例可由例如TNP设备11的设备执行的治疗控制过程600。为了方便,在TNP设备11的背景下描述治疗控制过程600,但该治疗控制过程可以在本文描述的其他***中实施或者由未示出的其他***实施。
在框61处,治疗控制过程600可以生成并输出控制信号。例如,控制器31可以生成控制信号并将其输出到驱动电路33。在框62处,治疗控制过程600可以响应于控制信号而激活开关。例如,驱动电路33可以响应于控制信号选择性地打开和关闭驱动电路33的一个或多个开关。在框63处,治疗控制过程600可以经由开关供应驱动信号。例如,驱动电路33可以经由打开和关闭驱动电路33的一个或多个开关将驱动信号供应给耦合电路35。在框64处,治疗控制过程600可以限制驱动信号随时间的变化率。例如,耦合电路35可以使用感抗来限制来自驱动电路33的驱动信号随时间的变化率。在框65处,治疗控制过程600可以响应于驱动信号而供应负压。例如,负压源33可以响应于驱动电路33经由耦合电路35提供的驱动信号而向伤口敷料13供应负压。
其他变型
本文提供的阈值、极限、持续时间等的任何值不旨在是绝对的,且因此可能是近似值。此外,本文提供的任何阈值、极限、持续时间等可为固定或,或自动地或由使用者改变。此外,如本文使用的相对于参考值的相对术语如超过、大于、小于等旨在还涵盖等于参考值。例如,超过正的参考值可包括等于或大于参考值。另外,如本文使用的相对于参考值的相对术语,例如超过、大于、小于等,也意图涵盖所公开关系的倒数,例如相对于参考值低于、小于、大于等。此外,尽管可在确定值满足或是不满足特定阈值方面描述各种过程的块,但是可类似地理解这些块,例如,在值(i)低于或高于阈值或(ii)满足或不满足阈值的值方面。
连同特定方面、实施例或实例描述的特征、材料、特点或集合理解为适用于本文所述的任何其他方面、实施例或实例,除非与其不相容。本说明书中公开的所有特征(包括任何所附权利要求、摘要和附图),或如此公开的任何方法或工艺的所有步骤,可以以任何组合来组合,除了此类特征或步骤中的至少一些相互排斥的组合外。保护不限于任何前述实施例的细节。保护延伸至本说明书中公开的特征(包括任何所附权利要求、摘要和附图)中的任何新颖的或任何新颖组合,或如此公开的任何方法或工艺的步骤的任何新颖的或任何新颖的组合。
虽然已经描述了某些实施例,但是这些实施例仅作为实例呈现,并且不旨在限制保护范围。实际上,这里描述的新颖方法和***可以以各种其他形式体现。此外,可以进行本文描述的方法和***的形式的各种省略、替换和改变。本领域技术人员将理解,在一些实施例中,所示或公开的方法中采取的实际步骤可不同于附图中所示的步骤。根据实施例,可去除上述某些步骤,可以添加其他步骤。例如,在所公开的过程中采取的实际步骤或步骤顺序可与图中所示的那些不同。根据实施例,可去除上述某些步骤,可以添加其他步骤。例如,图中所示的各种部件可实现为处理器、控制器、ASIC、FPGA或专用硬件上的软件或固件。诸如处理器、ASIC、FPGA等的硬件部件可包括逻辑电路。此外,以上公开的特定实施例的特征和属性可以以不同方式组合以形成另外的实施例,所有这些都落入本公开内容的范围内。
本发明中图示和描述的用户界面屏幕可包括附加或替代性部件。这些部件可包括菜单、列表、按钮、文本框、标签、单选按钮、滚动条、滑动条、复选框、组合框、状态栏、对话框、窗口等。用户界面屏幕可包括附加或替代性信息。可以任何适合的次序对部件进行设置、分组、显示。
尽管本公开包括某些实施例、实例和应用,但是本领域技术人员将理解,本公开内容超出了具体公开的实施例,延伸到其他备选实施例或用途以及其明显的修改和等同物,包括未提供本文所述的所有特征和优点的实施例。因此,本公开内容的范围不旨在受本文优选实施例的具体公开内容的限制,并且可由本文提出的权利要求或将来提出的权利要求限定。
条件语言,例如“能够”,“可以”,“可能”或“可以”,除非另有明确说明,或者在所使用的上下文中以其他方式理解,则通常旨在表达某些实施例包括,而其他实施例不包括,某些功能、元素或步骤。因此,这种条件语言大体上不旨在暗示一个或多个实施例以任何方式需要特征、元素或步骤,或者一个或多个实施例必须包括用于在有或没有用户输入或提示的情况下决定是否这些特征、元素或步骤包括在任何特定实施例中或在任何特定实施例中执行的逻辑。术语“包括”、“包含”、“具有”等是同义的,并且以开放式方式包含使用,并且不排除附加元素、特征、动作、操作等。此外,术语“或”在其包含意义上使用(而不是在其专有意义上),以便在使用时,例如,为了连接元素列表,术语“或”表示列表中的一个、一些或全部元素。此外,除了具有其普通含义之外,这里使用的术语“每个”可以表示应用术语“每个”的一组元素的任何子集。
除非另有明确说明,否则诸如短语“X、Y和Z中的至少一个”之类的联合语言在上下文中理解为通常用于表示项目、术语等可以是X、Y或Z。因此,这种联合语言大体上并不意味着暗示某些实施例需要存在X中的至少一个、Y中的至少一个和Z中的至少一个。
本文使用的程度语言,如本文使用的术语“约”、“大约”、“大体上”和“大致”表示接近于规定值、量或特征的值、量或特征,其仍执行的期望的功能或实现期望的结果。例如,术语“约”、“大约”、“大体上”和“大致”可以指在指定量的小于10%内、小于5%内、小于1%内、小于0.1%内,以及小于0.01%内。作为另一个实例,在某些实施例中,术语“大体上平行”和“大致平行”是指偏离精确平行小于或等于15度、10度、5度、3度、1度或0.1度的值、量或特征。
本公开内容的范围不受本段或本说明书中其他地方的优选实施例的具体公开内容的限制,并且可由本段或本说明书中其他地方或未来提出的权利要求限定。权利要求的语言将基于权利要求中采用的语言广泛地解释,并且不限于本说明书中或在申请的审查期间描述的实例,这些实例应被解释为非排他性的。
Claims (19)
1.一种用于向伤口施加负压的设备,所述设备包括:
负压源,其被配置成经由流体流动路径向置于患者伤口上的伤口敷料提供负压,所述负压源包括致动器,所述致动器被配置成将电能转换为机械能;
耦合电路,其包括感抗;
驱动电路,其被配置成经由所述耦合电路向所述致动器供应驱动信号,以使所述负压源提供负压;以及
控制器,其被配置成控制由所述驱动电路供应的所述驱动信号。
2.根据权利要求1所述的设备,其中所述致动器被配置成通过将电能转换为机械能而不是将电能转换为磁能来生成负压。
3.根据权利要求1所述的设备,其中所述负压源包括压电泵,并且所述致动器包括压电换能器。
4.根据权利要求1所述的设备,其中所述负压源包括微型泵。
5.根据权利要求1所述的设备,还包括伤口敷料,所述负压源设置在所述伤口敷料上或者所述伤口敷料内。
6.根据权利要求1所述的设备,其中所述耦合电路被配置成限制从所述驱动电路供应给所述致动器的所述驱动信号随时间的变化率。
7.根据权利要求1所述的设备,其中在1kHz的操作频率下,所述感抗大于5mΩ。
8.根据权利要求1所述的设备,其中所述耦合电路包括电感器,所述电感器串联电耦合在所述驱动电路的输出与所述致动器的输入之间。
9.根据权利要求8所述的设备,其中所述电感器具有1μH与100μH之间的电感。
10.根据权利要求9所述的设备,其中所述电感器具有至少1A的最大额定电流。
11.根据权利要求8所述的设备,其中所述耦合电路包括在所述驱动电路的另一输出与致动器的另一输入之间串联电耦合的电短路。
12.根据权利要求1所述的设备,其中所述驱动电路包括H-桥电路。
13.根据权利要求1所述的设备,其中所述控制器还被配置成将控制信号提供至所述驱动电路,并且所述控制器被配置成通过调节所述控制信号的脉冲宽度调制来控制所述驱动信号。
14.根据权利要求1所述的设备,其中所述驱动信号的幅值小于50V。
15.一种操作负压伤口治疗设备的方法,所述方法包括:
产生和输出控制信号;
响应于所述控制信号激活多个开关;
经由所述多个开关向负压源的致动器供应驱动信号;
限制所述驱动信号随时间的变化率;以及
响应于所述驱动信号,用所述负压源向伤口敷料供应负压。
16.根据权利要求15所述的方法,其中所述限制随时间的变化率包括使用感抗来限制所述随时间的变化率。
17.根据权利要求15所述的方法,其中通过将电能转换为机械能而不是将电能转换为磁能来执行所述供应负压。
18.根据权利要求15所述的方法,其中所述激活所述多个开关包括响应于所述控制信号激活所述多个开关的对。
19.根据权利要求15所述的方法,其中所述控制信号包括占空比为50%的方波。
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JP6975172B2 (ja) | 2021-12-01 |
US20190125943A1 (en) | 2019-05-02 |
WO2017191158A1 (en) | 2017-11-09 |
AU2017259003A1 (en) | 2018-11-15 |
US11305047B2 (en) | 2022-04-19 |
CA3022587A1 (en) | 2017-11-09 |
AU2017259003B2 (en) | 2022-09-22 |
JP2019518501A (ja) | 2019-07-04 |
EP3452131A1 (en) | 2019-03-13 |
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