CN1933769A - 血氧计环境光取消 - Google Patents

血氧计环境光取消 Download PDF

Info

Publication number
CN1933769A
CN1933769A CNA2005800058552A CN200580005855A CN1933769A CN 1933769 A CN1933769 A CN 1933769A CN A2005800058552 A CNA2005800058552 A CN A2005800058552A CN 200580005855 A CN200580005855 A CN 200580005855A CN 1933769 A CN1933769 A CN 1933769A
Authority
CN
China
Prior art keywords
optical signal
light
detects
wavelength
round
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2005800058552A
Other languages
English (en)
Inventor
伊桑·彼得森
威廉·谢伊
布拉德福德·B·丘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nellcor Puritan Bennett LLC
Original Assignee
Nellcor Puritan Bennett LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nellcor Puritan Bennett LLC filed Critical Nellcor Puritan Bennett LLC
Publication of CN1933769A publication Critical patent/CN1933769A/zh
Pending legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A61B5/14552—Details of sensors specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7228—Signal modulation applied to the input signal sent to patient or subject; demodulation to recover the physiological signal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7271—Specific aspects of physiological measurement analysis
    • A61B5/7278—Artificial waveform generation or derivation, e.g. synthesising signals from measured signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Physiology (AREA)
  • Signal Processing (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Psychiatry (AREA)
  • Cardiology (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Pulmonology (AREA)
  • Power Engineering (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

一种脉冲血氧计方法和设备，其(1)以一在一调制频率与一通用电力线频率(50、60、100和120)的公倍数之间的间隔提供一陷波滤波器(46)，并且(2)也提供一大于人体的最高脉冲率且低于50、60、100或120Hz的任何谐波的解调频率，以对环境光干扰进行滤波，同时选择一避免来自陷波滤波器或来自线干扰的谐波的干扰的最佳解调频率。而且，在光发射器波长中的每一波长之前和之后都测量对于例如电力线干扰的任何低频干扰的环境光，并且随后从所检测的信号中减去环境光的平均量。

Description

血氧计环境光取消
技术领域
本发明涉及血氧计，且更特定而言，涉及用于脉冲血氧计中的环境光取消的技术。
背景技术
脉冲血氧定量法通常用于测量各种血液流动特征，包括(但不限于)：动脉血中血红蛋白的血氧饱和度、供应给组织的个别血液脉动的体积，和对应于患者的每一次心跳的血液脉动率。这些特征的测量已由使用非侵入性传感器来完成。所述传感器将光散射而穿过患者组织中有血液灌注到组织的一部分中，且光电地感测光在上述组织中的吸收。所吸收的光的量接着用来计算所测量的血液成分的量。
选择散射过组织的光以具有一个或一个以上的波长，其由血液吸收且吸收数量表示血液中的血液成分的量。所传输散射穿过组织的光的量将根据组织中的血液成分的变化量和相关的光吸收而改变。根据用于测量血氧饱和度的已知技术，为测量血氧含量，这些传感器通常已具有适用于产生具有至少两种不同波长的光的光源，且具有对那两种波长敏感的光电检测器。
已知非侵入性传感器包括紧固到身体的一部分(例如，手指、耳朵或头皮)上的装置。在动物和人类中，这些身体部分的组织灌注有血液并且组织表面能够由传感器所接近。
关于血氧计测量的一个麻烦在于：除接收针对组织的光以外，光电检测器也检测周围光。可作出尝试来遮蔽环境光，但通常将检测到若干量的环境光。特别要考虑处于荧光或其他灯的电力线频率的光，其在美国为60Hz而在欧洲和其他国家为50Hz。
由于通常使用一单个光电检测器，因此具有不同波长的光(例如红光和红外光)为时间分隔多路传输。必须对所检测的信号进行多路分解。多路分解频率必须足够地高以使得其远大于脉冲率。然而，选择一多路分解频率也受环境光干扰影响。一个问题为：AC电力线频率的谐波混叠。U.S.专利第5,713,355号论述根据以各频率检测的环境干扰的量而改变多路分解频率的技术。
U.S.专利第5,885,213号论述从所检测的光信号中减去一暗信号(所检测的环境光)。这通过以下方式来完成：停止红光发射器和红外光发射器，在中间接通它们使得可检测假定包含存在环境光的“暗”信号。这可随后从期望信号中减去。处理环境光问题的专利的其他实例为U.S.专利第6,385,471号、第5,846,190号和第4,781,195号。
U.S.专利第6,449,501号论述使用一陷波滤波器来滤出线路频率。然而，取样率描述为设置为电力线干扰的基频的两倍，从而留下电力线干扰的更高谐波成为麻烦，并且不清楚如何在不对调制频率进行滤波的情况下对干扰进行滤波。所使用的陷波滤波器的另一实例陈述于U.S.专利第4,802,486号中，其中陷波滤波器用于EKG信号。
发明内容
本发明提供一种脉冲血氧计方法和设备，其(1)以一在一调制频率与一通用电力线频率(50、60、100和120)的公倍数之间的间隔提供一陷波滤波器(46)，并且(2)也提供一大于人体的最高脉冲率且低于50、60、100或120Hz的任何谐波的解调频率。本发明因此允许对环境光干扰的主要源进行滤波，同时选择一避免来自陷波滤波器或来自电力线干扰的谐波的干扰的最佳解调频率。
在一个实施例中，所述公倍数为1200，其中解调频率在与1200相差5与20Hz之间，在一个实施例中，优选为大约1211。
在本发明的另一方面中，在光发射器波长(在一个实施例中为红光和红外光)中的每一波长之前和之后都测量暗信号、或环境光。替代简单地减去暗等级中的一者，将两个暗等级平均，并且随后从所检测的信号中减去所述平均结果。这补偿由于所检测的信号期间的环境光中的变化，从而降低电力线干扰或任何其他低频干扰的效应。
在本发明的另一方面中，在数字域中完成数字滤波和分样。当在前端硬件中的增益设置上或在LED功率上发生改变时，预先加载滤波器以将值放入其存储器中，以对应于对新增益或功率设置处的输出的稳定值的估计。这预先加载加速了有效数据可用于滤波器的输出的时间。
附图说明
图1是并入本发明的血氧计的方框图。
图2是包括一陷波滤波器的本发明的一个实施例中的数字操纵的一部分的方框图。
图3是说明在本发明的一个实施例中平均的多个暗等级的图。
图4是说明根据本发明的一个实施例的数字滤波器和分样器的预先加载的图。
具体实施方式
整体系统
图1说明并入本发明的血氧定量法系统的实施例。传感器10包括红光LED和红外光LED以及光电检测器。电缆12将它们连接到电路板14。由一LED驱动接口16提供LED驱动电流。将从传感器接收到的光电流提供到一I-V接口18。随后将IR电压和红光电压提供到一并入本发明的∑-Δ接口20。将∑-Δ接口20的输出提供给一微控制器22。微控制器22包括用于程序的闪存，和用于数据的EEPROM存储器。所述血氧计也包括一个连接到闪存26的微处理器芯片24。最后，使用一个时钟28并且提供一个接口30以用于传感器10中的数字校准。一独立主机32接收经处理的信息，并且在线34上接收一模拟信号以用于提供模拟显示。
陷波滤波器
图2展示一个模拟到数字转换器40，其提供一个待由图1的微控制器22操纵的数字信号。微处理器应包括一个解调器42、四级滤波器/分样器44、利用一陷波的低通滤波器46，以及用于如此项技术中已知的用于数字操纵信号和计算氧饱和度的其他区块。在解调后仅展示红光通道，但类似通道用于IR.信号。
陷波滤波器46处理电力线干扰，在美国，其来自在60Hz或120Hz(根据电源要求而定)上操作的光。欧洲和其他区域使用50Hz或100Hz。50、60、100和120Hz的一公倍数为1200Hz。调制频宽经选择为高于最高可能人体脉冲率，优选高于5Hz。同时，其经选择为低于电力线干扰信号的任何谐波。将二十赫兹选择为一希望的上限，因为2450的第二谐波将在2025Hz混叠。在一个实施例中，将调制频率选择为1211.23Hz。这距1200Hz有11.23Hz间隔(在5-20Hz的范围内)。因此，在一优选实施例中，在陷波滤波器中以11.23Hz提供零。在一个实施例中，利用陷波的低通滤波器(46)为在11.25Hz下利用陷波的8极贝塞耳(Bessel)滤波器。
本发明因此提供一种消除来自电力干扰的干扰的有效方法，所述干扰可混叠入所检测的信号中，例如荧光灯上的纹波。虽然已在一解调器之前在硬件中提供防混叠滤波器，但仍难以使这些防混叠滤波器有效，且因此在数字域中将存在待处理的所检测信号中的一些残余线干扰。
平均环境暗等级以减少低频干扰
图3说明本发明的另一方面：通过平均取样周期之前和之后的环境暗等级来解释来自电力线或其他源的低频干扰，而减少环境干扰。图3展示在2400的取样率下的信号。图3中的向上倾斜线是由于60Hz电力线干扰。需要消除这向上倾斜(其在60Hz(或50Hz等)的其他部分中将向下)信号。
图3展示在调制的不同周期期间所检测的信号。所检测的信号电平由线50说明。在一第一暗周期52期间，红光LED或IR LED均未接通，从而允许对暗、或环境光取样。在这个取样之后，在一时间周期54期间，红光LED接通，其中信号50随着红光LED到达其完全强度而在这周期期间上升。在时间周期56期间，所检测的信号对应于接通状态的红光LED。
在周期58期间红光LED关闭且信号衰减，之后，取样一第二暗周期60。
随后，IR LED在周期62期间接通，且在周期64期间经取样。其在一周期66期间关闭且信号衰减，其中在周期68期间进行一第三暗取样。所述第三暗取样也对应于第一暗周期52，因为过程自身重复。
如在图3中可见，如果仅使用所述暗等级中的一个暗等级，那么如果环境等级例如由于低频干扰而改变，那么可测量不准确的环境等级。通过针对一特定波长将取样周期之前和之后的暗周期平均化，可获得对环境暗等级信号的一个更准确地测量。例如，在红光调制周期56期间的环境干扰是由测量周期52期间的暗1信号、周期60期间的暗2信号并且平均这些信号来确定。类似地，对于红外光调制周期64，平均周期60期间的暗2信号和周期68期间的暗3信号并且从所检测的IR信号中减去所述平均结果以消除环境干扰。所有这些计算将通过图1的微控制器22在数字域中完成。
预先加载分样和贝塞耳(Bessel)滤波器
图4说明本发明的另一方面，其中预先加载滤波器和软件。在模拟输入信通过∑-Δ调制器和多位模拟数字转换器处理之前，其通常在一硬件放大器84中放大。在由∑-Δ调制器86处理并且转换为数字域之后，由分样器88对其进行分样以降低取样率并且由贝塞耳(Bessel)滤波器滤波。一控制器92使用对输出的稳定值将为何值的估计预先加载贝塞耳(Bessel)滤波器和分样器的存储器。这将显著减少滤波器在其输入上的阶跃变化之后的稳定时间。所述输入上的阶跃变化可由放大器84的增益设置上的改变而发生。或者，阶跃变化可为所激活的特定LED、LED的功率或前端硬件的其他增益设置上的改变的结果。由于控制器92将激活所述改变，因此，其将了解何时使用正确值来预先加载滤波器和分样器。虽然这些在图4中展示为区块，但应了解，在优选实施例中，这是由充当控制器92、滤波器88和分样器90的软件程序完成。滤波器和分样器的这预先加载通过缩短稳定时间提供可更快使用的有效数据。
如所属领域的技术人员将了解，本发明可以其它特定形式体现，而不脱离本发明的本质特征。例如，可使用两种以上不同波长的光。或者，应选择不同解调频率。另外，陷波滤波可在对所检测信号进行其他数字处理之前或之后完成。因此，前述描述意在对以上权利要求书中所阐述的本发明的范畴进行说明而非限制。

Claims (18)

1.一种用于操作一脉冲血氧计的方法，其包含：
使用一距50、60、100和120的一公倍数一预定间隔的调制频率以两种波长交替产生光；
所述预定间隔大于一人体的一最高脉冲率且小于50、60、100或120的任何谐波的一间隔；
将所述光引导到一组织位置处；
检测一散射离开所述组织位置的所检测的光信号；
以一为所述公倍数的频率对所述所检测的光信号进行陷波滤波。
2.根据权利要求1所述的方法，其进一步包含：
数字化所述所检测的光信号，以提供一数字化信号；和
所述陷波滤波是对所述数字化信号执行的。
3.根据权利要求1所述的方法，其中所述公倍数为1200。
4.根据权利要求1所述的方法，其中所述预定间隔在5赫兹与20赫兹之间。
5.根据权利要求1所述的方法，其中所述预定间隔为大约11赫兹。
6.根据权利要求1所述的方法，其中所述陷波滤波是通过在一数字滤波器中以所述间隔提供一零而执行的。
7.根据权利要求1所述的方法，其中
所述调制频率用于在产生具有所述第一波长的光的一第一周期、没有光产生的一暗周期与产生具有所述第二波长的光的一第二周期之间交替；
通过平均所述第一周期之前和之后的所述暗周期中的所述所检测的光信号的一数量，来估计在所述第一周期期间在所述所检测的光信号中的一环境光等级；
通过平均所述第二周期之前和之后的所述暗周期中的所述所检测的光信号的一数量，来估计在所述第二周期期间在所述所检测的光信号中的一环境光等级。
8.一种用于测量在一脉冲血氧计中的一所检测光信号的方法，其包含：
使用一调制频率以两个波长交替产生光；
将所述光引导在一组织位置处；
检测一散射离开所述组织位置的所检测的光信号；
使用所述调制频率在产生具有所述第一波长的光的一第一周期、没有光产生的一暗周期与产生具有所述第二波长的光的一第二周期之间交替；
通过平均所述第一周期之前和之后的所述暗周期中的所述所检测的光信号的一数量，来估计在所述第一周期期间在所述所检测的光信号中的一环境光等级；和
通过平均所述第二周期之前和之后的所述暗周期中的所述所检测的光信号的一数量，来估计在所述第二周期期间在所述所检测的光信号中的一环境光等级。
9.根据权利要求8所述的方法，其进一步包含：
从所述所检测的光信号中减去一估计环境光等级。
10.一种脉冲血氧计，其包含：
至少一光发射器；
一控制电路，其用于使用一距50、60、100和120的一公倍数一预定间隔的调制频率从所述至少一光发射器以两种波长交替产生光；
所述预定间隔大于一人体的一最高脉冲率且小于50、60、100或120的任何谐波的一间隔；
一检测器，其用于检测一散射离开一组织位置的所检测的光信号；
一处理电路，其用于处理所述所检测的光信号，所述处理电路包括一陷波滤波器，
所述陷波滤波器经配置用来以一为所述公倍数的频率对所述所检测的光信号进行滤波。
11.根据权利要求10所述的脉冲血氧计，其进一步包含：
一模拟到数字转换器，其用于数字化所述所检测的光信号以提供一数字化信号；和
所述陷波滤波器是一数字滤波器。
12.根据权利要求10所述的脉冲血氧计，其中所述公倍数为1200。
13.根据权利要求10所述的脉冲血氧计，其中所述预定间隔在5赫兹与20赫兹之间。
14.根据权利要求10所述的脉冲血氧计，其中所述预定间隔为大约11赫兹。
15.根据权利要求10所述的脉冲血氧计，其中所述陷波滤波器在一数字滤波器中以所述间隔提供一零。
16.根据权利要求1所述的脉冲血氧计，其进一步包含：
所述控制电路经配置以在产生具有所述第一波长的光的一第一周期、没有光产生的一暗周期与产生具有所述第二波长的光的一第二周期之间交替；
所述处理电路经配置，以通过平均所述第一周期之前和之后的所述暗周期中的所述所检测的光信号的一数量，来估计在所述第一周期期间在所述所检测的光信号中的一环境光等级，并且通过平均所述第二周期之前和之后的所述暗周期中的所述所检测的光信号的一数量，来估计在所述第二周期期间在所述所检测的光信号中的一环境光等级。
17.一种脉冲血氧计，其包含：
至少一光发射器；
一控制电路，其用于使用一调制频率从所述至少一光发射器以两种波长交替产生光；
一检测器，其用于检测一散射离开所述组织位置的所检测的光信号；
所述控制电路经配置以在产生具有所述第一波长的光的一第一周期、没有光产生的一暗周期与产生具有所述第二波长的光的一第二周期之间交替；
一处理电路，其经配置以通过平均所述第一周期之前和之后的所述暗周期中的所述所检测的光信号的一数量，来估计在所述第一周期期间在所述所检测的光信号中的一环境光等级，并且通过平均所述第二周期之前和之后的所述暗周期中的所述所检测的光信号的一数量，来估计在所述第二周期期间在所述所检测的光信号中的一环境光等级。
18.一种血氧计设备，其包含：
一∑-Δ调制器，其具有一经耦合以接收一模拟传感器信号的输入端；
一硬件放大器，其用于放大一传感器信号以提供一经放大的信号作为所述模拟传感器信号；
一多位模拟到数字转换器，其耦合到所述∑-Δ调制器的所述输出端以提供一数字输出；
一分样器，其经配置以对所述数字输出进行操作；
一数字滤波器，其经配置以对所述数字输出进行操作；和
一控制程序，其用于在修改所述硬件放大器的增益之后，使用对一稳定输出值的
一估计预先加载所述分样器和数字滤波器。
CNA2005800058552A 2004-02-25 2005-02-24 血氧计环境光取消 Pending CN1933769A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/787,854 US7190985B2 (en) 2004-02-25 2004-02-25 Oximeter ambient light cancellation
US10/787,854 2004-02-25

Publications (1)

Publication Number Publication Date
CN1933769A true CN1933769A (zh) 2007-03-21

Family

ID=34861937

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2005800058552A Pending CN1933769A (zh) 2004-02-25 2005-02-24 血氧计环境光取消

Country Status (12)

Country Link
US (4) US7190985B2 (zh)
EP (1) EP1722675B1 (zh)
JP (1) JP2007523717A (zh)
KR (1) KR20070024488A (zh)
CN (1) CN1933769A (zh)
AT (1) ATE403397T1 (zh)
AU (1) AU2005216985A1 (zh)
CA (1) CA2556748C (zh)
DE (1) DE602005008718D1 (zh)
ES (1) ES2311980T3 (zh)
MX (1) MXPA06009755A (zh)
WO (1) WO2005082242A1 (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102512178A (zh) * 2011-12-23 2012-06-27 深圳市理邦精密仪器股份有限公司 一种血氧测量装置和方法
CN102713569A (zh) * 2010-01-28 2012-10-03 霍夫曼-拉罗奇有限公司 尤其是用于血糖确定的测量系统和测量方法
CN103271745A (zh) * 2013-06-07 2013-09-04 秦皇岛市康泰医学系统有限公司 一种脉搏血氧仿真系统及实现方法
CN104706336A (zh) * 2014-12-31 2015-06-17 歌尔声学股份有限公司 一种光电式脉搏信号测量方法、装置及测量设备
CN106031639A (zh) * 2015-03-07 2016-10-19 上海贝瑞电子科技有限公司 一种高精度血氧检测管理方法及系统
US9949695B2 (en) 2014-12-31 2018-04-24 Goertek Inc. Photoelectric type pulse signal measuring method and apparatus
CN115266583A (zh) * 2022-07-16 2022-11-01 北京津发科技股份有限公司 环境光滤除方法、系统、计算机设备及计算机可读存储介质

Families Citing this family (80)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7190985B2 (en) 2004-02-25 2007-03-13 Nellcor Puritan Bennett Inc. Oximeter ambient light cancellation
EP2286721B1 (en) 2005-03-01 2018-10-24 Masimo Laboratories, Inc. Physiological Parameter Confidence Measure
US7510533B2 (en) * 2005-03-15 2009-03-31 Codman & Shurtleff, Inc. Pressure sensing valve
US8265723B1 (en) 2006-10-12 2012-09-11 Cercacor Laboratories, Inc. Oximeter probe off indicator defining probe off space
US8102259B2 (en) * 2006-10-17 2012-01-24 Honeywell International Inc. Fluorescent light immunity through synchronous sampling
US8157730B2 (en) 2006-12-19 2012-04-17 Valencell, Inc. Physiological and environmental monitoring systems and methods
US8652040B2 (en) 2006-12-19 2014-02-18 Valencell, Inc. Telemetric apparatus for health and environmental monitoring
KR100859981B1 (ko) * 2007-01-19 2008-09-25 삼성전자주식회사 광용적맥파 측정 센서
WO2008106612A1 (en) 2007-02-28 2008-09-04 Medtronic, Inc. Implantable tissue perfusion sensing system and method
US8280469B2 (en) 2007-03-09 2012-10-02 Nellcor Puritan Bennett Llc Method for detection of aberrant tissue spectra
US20080221418A1 (en) * 2007-03-09 2008-09-11 Masimo Corporation Noninvasive multi-parameter patient monitor
JP2008232662A (ja) * 2007-03-16 2008-10-02 Matsushita Electric Ind Co Ltd 光学測定装置
EP2139383B1 (en) 2007-03-27 2013-02-13 Masimo Laboratories, Inc. Multiple wavelength optical sensor
US8374665B2 (en) 2007-04-21 2013-02-12 Cercacor Laboratories, Inc. Tissue profile wellness monitor
US20140073891A1 (en) * 2007-04-25 2014-03-13 Neurophysics Corporation Instrument for measuring carbon monoxide poisoning of humans using in vivo nirs technology
US20080269577A1 (en) * 2007-04-25 2008-10-30 Neurophysics Corporation Instrument for measuring carbon monoxide poisoning of humans using in vivo nirs technology
US8419649B2 (en) 2007-06-12 2013-04-16 Sotera Wireless, Inc. Vital sign monitor for measuring blood pressure using optical, electrical and pressure waveforms
US11607152B2 (en) 2007-06-12 2023-03-21 Sotera Wireless, Inc. Optical sensors for use in vital sign monitoring
US8602997B2 (en) 2007-06-12 2013-12-10 Sotera Wireless, Inc. Body-worn system for measuring continuous non-invasive blood pressure (cNIBP)
US11330988B2 (en) 2007-06-12 2022-05-17 Sotera Wireless, Inc. Body-worn system for measuring continuous non-invasive blood pressure (cNIBP)
US8376952B2 (en) * 2007-09-07 2013-02-19 The Nielsen Company (Us), Llc. Method and apparatus for sensing blood oxygen
US8251903B2 (en) 2007-10-25 2012-08-28 Valencell, Inc. Noninvasive physiological analysis using excitation-sensor modules and related devices and methods
US8204567B2 (en) 2007-12-13 2012-06-19 Nellcor Puritan Bennett Llc Signal demodulation
CN102065749B (zh) * 2008-06-16 2013-06-19 皇家飞利浦电子股份有限公司 利用“就地”调制方案监测患者的生命参数以避免干扰
US9078609B2 (en) * 2008-10-02 2015-07-14 Nellcor Puritan Bennett Ireland Extraction of physiological measurements from a photoplethysmograph (PPG) signal
US9750462B2 (en) 2009-02-25 2017-09-05 Valencell, Inc. Monitoring apparatus and methods for measuring physiological and/or environmental conditions
US8788002B2 (en) 2009-02-25 2014-07-22 Valencell, Inc. Light-guiding devices and monitoring devices incorporating same
EP3127476A1 (en) 2009-02-25 2017-02-08 Valencell, Inc. Light-guiding devices and monitoring devices incorporating same
US8672854B2 (en) 2009-05-20 2014-03-18 Sotera Wireless, Inc. System for calibrating a PTT-based blood pressure measurement using arm height
US8909330B2 (en) 2009-05-20 2014-12-09 Sotera Wireless, Inc. Body-worn device and associated system for alarms/alerts based on vital signs and motion
US11896350B2 (en) 2009-05-20 2024-02-13 Sotera Wireless, Inc. Cable system for generating signals for detecting motion and measuring vital signs
US20100324388A1 (en) 2009-06-17 2010-12-23 Jim Moon Body-worn pulse oximeter
US8494786B2 (en) 2009-07-30 2013-07-23 Covidien Lp Exponential sampling of red and infrared signals
US20110066043A1 (en) * 2009-09-14 2011-03-17 Matt Banet System for measuring vital signs during hemodialysis
US8545417B2 (en) 2009-09-14 2013-10-01 Sotera Wireless, Inc. Body-worn monitor for measuring respiration rate
US10806351B2 (en) 2009-09-15 2020-10-20 Sotera Wireless, Inc. Body-worn vital sign monitor
US20110066044A1 (en) 2009-09-15 2011-03-17 Jim Moon Body-worn vital sign monitor
US10420476B2 (en) 2009-09-15 2019-09-24 Sotera Wireless, Inc. Body-worn vital sign monitor
US8527038B2 (en) 2009-09-15 2013-09-03 Sotera Wireless, Inc. Body-worn vital sign monitor
CN102647941B (zh) * 2009-10-06 2015-11-25 皇家飞利浦电子股份有限公司 用于执行远程光电容积描记的方法和系统
US9839381B1 (en) 2009-11-24 2017-12-12 Cercacor Laboratories, Inc. Physiological measurement system with automatic wavelength adjustment
DE112010004682T5 (de) 2009-12-04 2013-03-28 Masimo Corporation Kalibrierung für mehrstufige physiologische Monitore
US20110224499A1 (en) 2010-03-10 2011-09-15 Sotera Wireless, Inc. Body-worn vital sign monitor
JP2011200271A (ja) * 2010-03-24 2011-10-13 Panasonic Corp 脈波検出装置
US8747330B2 (en) 2010-04-19 2014-06-10 Sotera Wireless, Inc. Body-worn monitor for measuring respiratory rate
US9339209B2 (en) 2010-04-19 2016-05-17 Sotera Wireless, Inc. Body-worn monitor for measuring respiratory rate
US8979765B2 (en) 2010-04-19 2015-03-17 Sotera Wireless, Inc. Body-worn monitor for measuring respiratory rate
US9173593B2 (en) 2010-04-19 2015-11-03 Sotera Wireless, Inc. Body-worn monitor for measuring respiratory rate
US8888700B2 (en) 2010-04-19 2014-11-18 Sotera Wireless, Inc. Body-worn monitor for measuring respiratory rate
US9173594B2 (en) 2010-04-19 2015-11-03 Sotera Wireless, Inc. Body-worn monitor for measuring respiratory rate
US20140249432A1 (en) 2010-12-28 2014-09-04 Matt Banet Body-worn system for continuous, noninvasive measurement of cardiac output, stroke volume, cardiac power, and blood pressure
US8761853B2 (en) 2011-01-20 2014-06-24 Nitto Denko Corporation Devices and methods for non-invasive optical physiological measurements
US8888701B2 (en) 2011-01-27 2014-11-18 Valencell, Inc. Apparatus and methods for monitoring physiological data during environmental interference
WO2012112891A1 (en) 2011-02-18 2012-08-23 Sotera Wireless, Inc. Modular wrist-worn processor for patient monitoring
EP2675346B1 (en) 2011-02-18 2024-04-10 Sotera Wireless, Inc. Optical sensor for measuring physiological properties
WO2013016007A2 (en) 2011-07-25 2013-01-31 Valencell, Inc. Apparatus and methods for estimating time-state physiological parameters
EP2739207B1 (en) 2011-08-02 2017-07-19 Valencell, Inc. Systems and methods for variable filter adjustment by heart rate metric feedback
US9220409B2 (en) 2012-05-31 2015-12-29 Covidien Lp Optical instrument with ambient light removal
US20140175261A1 (en) * 2012-12-22 2014-06-26 Covidien Lp Methods and systems for detecting a sensor-off condition using interference components
EP2928364A4 (en) 2013-01-28 2015-11-11 Valencell Inc DEVICES FOR MONITORING PHYSIOLOGICAL FUNCTIONS WITH SENSOR ELEMENTS DIVIDED FROM BODY MOVEMENTS
CN103142237B (zh) * 2013-02-05 2014-11-26 天津大学 一种高效血氧饱和度检测电路
US20150126831A1 (en) * 2013-11-04 2015-05-07 Covidien Lp Medical sensor with ambient light shielding
CN103767712B (zh) * 2014-01-09 2015-10-21 深圳市理邦精密仪器股份有限公司 一种抗环境光干扰的血氧测量装置及其方法
JP6455994B2 (ja) 2014-06-30 2019-01-23 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． フォトプレチスモグラフィセンサ装置及び方法
US9538921B2 (en) 2014-07-30 2017-01-10 Valencell, Inc. Physiological monitoring devices with adjustable signal analysis and interrogation power and monitoring methods using same
EP3199100A1 (en) 2014-08-06 2017-08-02 Valencell, Inc. Earbud with a physiological information sensor module
US9794653B2 (en) 2014-09-27 2017-10-17 Valencell, Inc. Methods and apparatus for improving signal quality in wearable biometric monitoring devices
US10945618B2 (en) 2015-10-23 2021-03-16 Valencell, Inc. Physiological monitoring devices and methods for noise reduction in physiological signals based on subject activity type
US10610158B2 (en) 2015-10-23 2020-04-07 Valencell, Inc. Physiological monitoring devices and methods that identify subject activity type
US10765375B2 (en) * 2015-11-20 2020-09-08 Covidien Lp Physiological monitoring methods and systems utilizing filter scaling
US10646144B2 (en) 2015-12-07 2020-05-12 Marcelo Malini Lamego Wireless, disposable, extended use pulse oximeter apparatus and methods
US10376223B2 (en) * 2016-03-28 2019-08-13 Fuji Xerox Co., Ltd. Living-body information measurement device and non-transitory computer readable medium
WO2018009736A1 (en) 2016-07-08 2018-01-11 Valencell, Inc. Motion-dependent averaging for physiological metric estimating systems and methods
WO2018123676A1 (ja) * 2016-12-27 2018-07-05 アルプス電気株式会社 センサモジュールおよび生体関連情報表示システム
US10736195B2 (en) * 2018-02-07 2020-08-04 Maxim Integrated Products, Inc. Matched filter techniques configured to fire led using a sloped response
US10659963B1 (en) 2018-02-12 2020-05-19 True Wearables, Inc. Single use medical device apparatus and methods
KR102189402B1 (ko) * 2019-01-11 2020-12-11 어보브반도체 주식회사 산소포화도 측정기의 이진검색 기반 자동 오프셋 교정장치
CN110604559B (zh) * 2019-10-25 2023-11-28 深圳市汇顶科技股份有限公司 环境光信号调节方法、芯片及电子装置
CN112806972B (zh) * 2019-11-18 2023-04-07 Oppo广东移动通信有限公司 Ppg测量电路和方法、可穿戴电子设备
CN117347750A (zh) * 2023-09-15 2024-01-05 深圳市志奋领科技有限公司 一种抵抗周期性光干扰的方法及装置

Family Cites Families (210)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638640A (en) * 1967-11-01 1972-02-01 Robert F Shaw Oximeter and method for in vivo determination of oxygen saturation in blood using three or more different wavelengths
US4938218A (en) 1983-08-30 1990-07-03 Nellcor Incorporated Perinatal pulse oximetry sensor
US4714341A (en) 1984-02-23 1987-12-22 Minolta Camera Kabushiki Kaisha Multi-wavelength oximeter having a means for disregarding a poor signal
AU571369B2 (en) 1985-02-28 1988-04-14 Boc Group, Inc., The Oximeter
US4911167A (en) * 1985-06-07 1990-03-27 Nellcor Incorporated Method and apparatus for detecting optical pulses
US4928692A (en) * 1985-04-01 1990-05-29 Goodman David E Method and apparatus for detecting optical pulses
US4934372A (en) * 1985-04-01 1990-06-19 Nellcor Incorporated Method and apparatus for detecting optical pulses
US4802486A (en) * 1985-04-01 1989-02-07 Nellcor Incorporated Method and apparatus for detecting optical pulses
US4936679A (en) 1985-11-12 1990-06-26 Becton, Dickinson And Company Optical fiber transducer driving and measuring circuit and method for using same
US4913150A (en) * 1986-08-18 1990-04-03 Physio-Control Corporation Method and apparatus for the automatic calibration of signals employed in oximetry
US4802488A (en) * 1986-11-06 1989-02-07 Sri International Blood pressure monitoring method and apparatus
US4805623A (en) * 1987-09-04 1989-02-21 Vander Corporation Spectrophotometric method for quantitatively determining the concentration of a dilute component in a light- or other radiation-scattering environment
US4848901A (en) 1987-10-08 1989-07-18 Critikon, Inc. Pulse oximeter sensor control system
US4807630A (en) * 1987-10-09 1989-02-28 Advanced Medical Systems, Inc. Apparatus and method for use in pulse oximeters
US4807631A (en) * 1987-10-09 1989-02-28 Critikon, Inc. Pulse oximetry system
US4863265A (en) 1987-10-16 1989-09-05 Mine Safety Appliances Company Apparatus and method for measuring blood constituents
EP0315040B1 (en) 1987-11-02 1993-01-27 Sumitomo Electric Industries Limited Bio-photosensor
US4800885A (en) * 1987-12-02 1989-01-31 The Boc Group, Inc. Blood constituent monitoring apparatus and methods with frequency division multiplexing
US4781195A (en) * 1987-12-02 1988-11-01 The Boc Group, Inc. Blood monitoring apparatus and methods with amplifier input dark current correction
US4948248A (en) 1988-07-22 1990-08-14 Invivo Research Inc. Blood constituent measuring device and method
JPH0288041A (ja) 1988-09-24 1990-03-28 Misawahoomu Sogo Kenkyusho:Kk 指尖脈波センサ
CA1331483C (en) 1988-11-02 1994-08-16 Britton Chance User-wearable hemoglobinometer for measuring the metabolic condition of a subject
US4972331A (en) 1989-02-06 1990-11-20 Nim, Inc. Phase modulated spectrophotometry
US5873821A (en) * 1992-05-18 1999-02-23 Non-Invasive Technology, Inc. Lateralization spectrophotometer
US5122974A (en) 1989-02-06 1992-06-16 Nim, Inc. Phase modulated spectrophotometry
US5564417A (en) 1991-01-24 1996-10-15 Non-Invasive Technology, Inc. Pathlength corrected oximeter and the like
EP0374668A3 (de) * 1988-12-16 1992-02-05 A.W. Faber - Castell GmbH & Co. Fluoreszierende Markierungsflüssigkeit
US5553614A (en) 1988-12-21 1996-09-10 Non-Invasive Technology, Inc. Examination of biological tissue using frequency domain spectroscopy
US5119815A (en) 1988-12-21 1992-06-09 Nim, Incorporated Apparatus for determining the concentration of a tissue pigment of known absorbance, in vivo, using the decay characteristics of scintered electromagnetic radiation
US5218207A (en) 1989-01-19 1993-06-08 Futrex, Inc. Using led harmonic wavelengths for near-infrared quantitative
US5028787A (en) 1989-01-19 1991-07-02 Futrex, Inc. Non-invasive measurement of blood glucose
US6708048B1 (en) * 1989-02-06 2004-03-16 Non-Invasive Technology, Inc. Phase modulation spectrophotometric apparatus
US6183414B1 (en) * 1999-04-26 2001-02-06 Michael S. Wysor Technique for restoring plasticity to tissues of a male or female organ
WO1991001678A1 (en) 1989-07-27 1991-02-21 National Research Development Corporation Oximeters
US5483646A (en) * 1989-09-29 1996-01-09 Kabushiki Kaisha Toshiba Memory access control method and system for realizing the same
US5190038A (en) * 1989-11-01 1993-03-02 Novametrix Medical Systems, Inc. Pulse oximeter with improved accuracy and response time
DE3938759A1 (de) * 1989-11-23 1991-05-29 Philips Patentverwaltung Nichtinvasive oximeteranordnung
US5096294A (en) * 1990-03-19 1992-03-17 Queen's University At Kingston Method and apparatus for measuring oxygen concentration and its subsequent use in estimating nitrogen fixation in plants
US6266546B1 (en) 1990-10-06 2001-07-24 In-Line Diagnostics Corporation System for noninvasive hematocrit monitoring
US6681128B2 (en) * 1990-10-06 2004-01-20 Hema Metrics, Inc. System for noninvasive hematocrit monitoring
US6246894B1 (en) 1993-02-01 2001-06-12 In-Line Diagnostics Corporation System and method for measuring blood urea nitrogen, blood osmolarity, plasma free hemoglobin and tissue water content
US5372136A (en) 1990-10-06 1994-12-13 Noninvasive Medical Technology Corporation System and method for noninvasive hematocrit monitoring
US5349952A (en) 1991-03-05 1994-09-27 Sensormedics Corp. Photoplethysmographics using phase-division multiplexing
MX9702434A (es) * 1991-03-07 1998-05-31 Masimo Corp Aparato de procesamiento de señales.
AU658177B2 (en) * 1991-03-07 1995-04-06 Masimo Corporation Signal processing apparatus and method
US5638818A (en) 1991-03-21 1997-06-17 Masimo Corporation Low noise optical probe
US5995855A (en) 1998-02-11 1999-11-30 Masimo Corporation Pulse oximetry sensor adapter
US6580086B1 (en) 1999-08-26 2003-06-17 Masimo Corporation Shielded optical probe and method
DE4138702A1 (de) * 1991-03-22 1992-09-24 Madaus Medizin Elektronik Verfahren und vorrichtung zur diagnose und quantitativen analyse von apnoe und zur gleichzeitigen feststellung anderer erkrankungen
US6549795B1 (en) * 1991-05-16 2003-04-15 Non-Invasive Technology, Inc. Spectrophotometer for tissue examination
US5351685A (en) 1991-08-05 1994-10-04 Nellcor Incorporated Condensed oximeter system with noise reduction software
US5246003A (en) 1991-08-28 1993-09-21 Nellcor Incorporated Disposable pulse oximeter sensor
US5934277A (en) * 1991-09-03 1999-08-10 Datex-Ohmeda, Inc. System for pulse oximetry SpO2 determination
US5247931A (en) 1991-09-16 1993-09-28 Mine Safety Appliances Company Diagnostic sensor clasp utilizing a slot, pivot and spring hinge mechanism
AU648925B2 (en) * 1991-10-21 1994-05-05 Matsushita Electric Industrial Co., Ltd. Electrolytic capacitor and method for producing the same
ES2123535T3 (es) 1992-01-25 1999-01-16 Alsthom Cge Alcatel Procedimiento para facilitar el manejo de aparatos terminales en instalaciones de telecomunicaciones.
US5385143A (en) * 1992-02-06 1995-01-31 Nihon Kohden Corporation Apparatus for measuring predetermined data of living tissue
US5297548A (en) * 1992-02-07 1994-03-29 Ohmeda Inc. Arterial blood monitoring probe
US5263244A (en) 1992-04-17 1993-11-23 Gould Inc. Method of making a flexible printed circuit sensor assembly for detecting optical pulses
EP0572684B1 (en) * 1992-05-15 1996-07-03 Hewlett-Packard GmbH Medical sensor
US6785568B2 (en) 1992-05-18 2004-08-31 Non-Invasive Technology Inc. Transcranial examination of the brain
US5355880A (en) 1992-07-06 1994-10-18 Sandia Corporation Reliable noninvasive measurement of blood gases
US5680857A (en) 1992-08-28 1997-10-28 Spacelabs Medical, Inc. Alignment guide system for transmissive pulse oximetry sensors
JP3116255B2 (ja) 1992-09-18 2000-12-11 日本光電工業株式会社 パルスオキシメータ
US5368224A (en) * 1992-10-23 1994-11-29 Nellcor Incorporated Method for reducing ambient noise effects in electronic monitoring instruments
US5368026A (en) * 1993-03-26 1994-11-29 Nellcor Incorporated Oximeter with motion detection for alarm modification
US5676141A (en) 1993-03-31 1997-10-14 Nellcor Puritan Bennett Incorporated Electronic processor for pulse oximeters
US5348004A (en) 1993-03-31 1994-09-20 Nellcor Incorporated Electronic processor for pulse oximeter
KR100294294B1 (ko) 1993-04-12 2001-09-17 로버트알.스튜에르 혈액내생물학적구성분의농도를측정하는장치
CA2155932A1 (en) * 1993-12-14 1995-06-22 Tadakazu Yamauchi Medical measuring apparatus
US5645059A (en) 1993-12-17 1997-07-08 Nellcor Incorporated Medical sensor with modulated encoding scheme
JP3238813B2 (ja) 1993-12-20 2001-12-17 テルモ株式会社 パルスオキシメータ
JP3464697B2 (ja) 1993-12-21 2003-11-10 興和株式会社 酸素飽和度測定装置
US5995859A (en) 1994-02-14 1999-11-30 Nihon Kohden Corporation Method and apparatus for accurately measuring the saturated oxygen in arterial blood by substantially eliminating noise from the measurement signal
US5575284A (en) 1994-04-01 1996-11-19 University Of South Florida Portable pulse oximeter
DE4423597C1 (de) * 1994-07-06 1995-08-10 Hewlett Packard Gmbh Pulsoximetrie-Ohrsensor
US5692503A (en) 1995-03-10 1997-12-02 Kuenstner; J. Todd Method for noninvasive (in-vivo) total hemoglobin, oxyhemogolobin, deoxyhemoglobin, carboxyhemoglobin and methemoglobin concentration determination
US7035697B1 (en) * 1995-05-30 2006-04-25 Roy-G-Biv Corporation Access control systems and methods for motion control
US5758644A (en) 1995-06-07 1998-06-02 Masimo Corporation Manual and automatic probe calibration
US5645060A (en) * 1995-06-14 1997-07-08 Nellcor Puritan Bennett Incorporated Method and apparatus for removing artifact and noise from pulse oximetry
US5853364A (en) 1995-08-07 1998-12-29 Nellcor Puritan Bennett, Inc. Method and apparatus for estimating physiological parameters using model-based adaptive filtering
EP0760223A1 (en) * 1995-08-31 1997-03-05 Hewlett-Packard GmbH Apparatus for monitoring, in particular pulse oximeter
DE19537646C2 (de) * 1995-10-10 1998-09-17 Hewlett Packard Gmbh Verfahren und Vorrichtung zum Erkennen verfälschter Meßwerte in der Pulsoximetrie zur Messung der Sauerstoffsättigung
US5995856A (en) 1995-11-22 1999-11-30 Nellcor, Incorporated Non-contact optical monitoring of physiological parameters
SE9600322L (sv) 1996-01-30 1997-07-31 Hoek Instr Ab Sensor för pulsoximetri med fiberoptisk signalöverföring
US5746697A (en) * 1996-02-09 1998-05-05 Nellcor Puritan Bennett Incorporated Medical diagnostic apparatus with sleep mode
JP3789487B2 (ja) * 1996-04-01 2006-06-21 リンデ・メディカル・センサーズ・アクチェンゲゼルシャフト パルス酸素濃度測定における偽信号の検出方法
US6163715A (en) 1996-07-17 2000-12-19 Criticare Systems, Inc. Direct to digital oximeter and method for calculating oxygenation levels
US5842981A (en) 1996-07-17 1998-12-01 Criticare Systems, Inc. Direct to digital oximeter
US5830139A (en) 1996-09-04 1998-11-03 Abreu; Marcio M. Tonometer system for measuring intraocular pressure by applanation and/or indentation
US6120460A (en) 1996-09-04 2000-09-19 Abreu; Marcio Marc Method and apparatus for signal acquisition, processing and transmission for evaluation of bodily functions
US6544193B2 (en) 1996-09-04 2003-04-08 Marcio Marc Abreu Noninvasive measurement of chemical substances
US5871442A (en) * 1996-09-10 1999-02-16 International Diagnostics Technologies, Inc. Photonic molecular probe
WO1998010699A1 (fr) 1996-09-10 1998-03-19 Seiko Epson Corporation Dispositif de mesure de l'etat de l'organisme et dispositif donnant des instructions de relaxation
US5830136A (en) 1996-10-31 1998-11-03 Nellcor Puritan Bennett Incorporated Gel pad optical sensor
DE19647877C2 (de) 1996-11-19 2000-06-15 Univ Ilmenau Tech Verfahren und Schaltungsanordnung zur Ermittlung der Sauerstoffsättigung im Blut
US5921921A (en) * 1996-12-18 1999-07-13 Nellcor Puritan-Bennett Pulse oximeter with sigma-delta converter
JPH10201743A (ja) * 1997-01-20 1998-08-04 Advanced Medical Kk オキシメータ
US6487439B1 (en) 1997-03-17 2002-11-26 Victor N. Skladnev Glove-mounted hybrid probe for tissue type recognition
JP2001517128A (ja) 1997-03-21 2001-10-02 ネルコー・ピューリタン・ベネット・インコーポレイテッド 血液成分値の最良な評価を得るために調停し，高調波を除去するための方法および装置
US5954644A (en) * 1997-03-24 1999-09-21 Ohmeda Inc. Method for ambient light subtraction in a photoplethysmographic measurement instrument
US6596016B1 (en) 1997-03-27 2003-07-22 The Board Of Trustees Of The Leland Stanford Junior University Phototherapy of jaundiced newborns using garments containing semiconductor light-emitting devices
US6229856B1 (en) 1997-04-14 2001-05-08 Masimo Corporation Method and apparatus for demodulating signals in a pulse oximetry system
US5919134A (en) 1997-04-14 1999-07-06 Masimo Corp. Method and apparatus for demodulating signals in a pulse oximetry system
AUPO676397A0 (en) 1997-05-13 1997-06-05 Dunlop, Colin Method and apparatus for monitoring haemodynamic function
CN1309341C (zh) 1997-06-17 2007-04-11 里普朗尼克股份有限公司 胎儿血氧测定系统和传感器
AU7934498A (en) * 1997-06-27 1999-01-19 Toa Medical Electronics Co., Ltd. Living body inspecting apparatus and noninvasive blood analyzer using the same
FI973454A (fi) 1997-08-22 1999-02-23 Instrumentarium Oy Joustoväline mittausanturissa, jolla havannoidaan elävän kudoksen ominaisuuksia
EP1041923A1 (en) 1997-12-22 2000-10-11 BTG INTERNATIONAL LIMITED (Company No. 2664412) Artefact reduction in photoplethysmography
DE69700384T2 (de) 1997-12-22 1999-11-25 Hewlett-Packard Co., Palo Alto Telemetriesystem, insbesondere für medizinische Zwecke
JP3567319B2 (ja) 1997-12-26 2004-09-22 日本光電工業株式会社 パルスオキシメータ用プローブ
JP2002501803A (ja) 1998-02-05 2002-01-22 イン−ラインダイアグノスティックスコーポレイション 非観血的血液成分モニタ方法および装置
JP3576851B2 (ja) * 1998-03-23 2004-10-13 キヤノン株式会社 液晶表示装置、ビデオカメラ
US6662030B2 (en) * 1998-05-18 2003-12-09 Abbott Laboratories Non-invasive sensor having controllable temperature feature
IL124787A0 (en) 1998-06-07 1999-01-26 Itamar Medical C M 1997 Ltd Pressure applicator devices particularly useful for non-invasive detection of medical conditions
US5920263A (en) 1998-06-11 1999-07-06 Ohmeda, Inc. De-escalation of alarm priorities in medical devices
US6266539B1 (en) * 1998-06-12 2001-07-24 Cisco Technology, Inc. Telephone docking station for personal digital assistant
US6842635B1 (en) * 1998-08-13 2005-01-11 Edwards Lifesciences Llc Optical device
JP2000083933A (ja) * 1998-07-17 2000-03-28 Nippon Koden Corp 生体組織中吸光物質濃度測定装置
US6671526B1 (en) 1998-07-17 2003-12-30 Nihon Kohden Corporation Probe and apparatus for determining concentration of light-absorbing materials in living tissue
US6949081B1 (en) 1998-08-26 2005-09-27 Non-Invasive Technology, Inc. Sensing and interactive drug delivery
US6064898A (en) 1998-09-21 2000-05-16 Essential Medical Devices Non-invasive blood component analyzer
WO2000021438A1 (en) 1998-10-15 2000-04-20 University Of Florida Research Foundation Device for determining respiratory rate from optoplethysmogram
US6684090B2 (en) * 1999-01-07 2004-01-27 Masimo Corporation Pulse oximetry data confidence indicator
US6606511B1 (en) 1999-01-07 2003-08-12 Masimo Corporation Pulse oximetry pulse indicator
CA2358454C (en) * 1999-01-25 2010-03-23 Masimo Corporation Universal/upgrading pulse oximeter
US6658276B2 (en) 1999-01-25 2003-12-02 Masimo Corporation Pulse oximeter user interface
US6438399B1 (en) 1999-02-16 2002-08-20 The Children's Hospital Of Philadelphia Multi-wavelength frequency domain near-infrared cerebral oximeter
US7047054B2 (en) 1999-03-12 2006-05-16 Cas Medical Systems, Inc. Laser diode optical transducer assembly for non-invasive spectrophotometric blood oxygenation monitoring
US6360114B1 (en) 1999-03-25 2002-03-19 Masimo Corporation Pulse oximeter probe-off detector
US6226539B1 (en) * 1999-05-26 2001-05-01 Mallinckrodt, Inc. Pulse oximeter having a low power led drive
US6675029B2 (en) * 1999-07-22 2004-01-06 Sensys Medical, Inc. Apparatus and method for quantification of tissue hydration using diffuse reflectance spectroscopy
US7904139B2 (en) * 1999-08-26 2011-03-08 Non-Invasive Technology Inc. Optical examination of biological tissue using non-contact irradiation and detection
US6708049B1 (en) * 1999-09-28 2004-03-16 Nellcor Puritan Bennett Incorporated Sensor with signature of data relating to sensor
US6618042B1 (en) * 1999-10-28 2003-09-09 Gateway, Inc. Display brightness control method and apparatus for conserving battery power
JP2001149349A (ja) * 1999-11-26 2001-06-05 Nippon Koden Corp 生体用センサ
US6415236B2 (en) 1999-11-30 2002-07-02 Nihon Kohden Corporation Apparatus for determining concentrations of hemoglobins
US6622095B2 (en) 1999-11-30 2003-09-16 Nihon Kohden Corporation Apparatus for determining concentrations of hemoglobins
US6397092B1 (en) 1999-12-17 2002-05-28 Datex-Ohmeda, Inc. Oversampling pulse oximeter
WO2001045553A1 (en) 1999-12-22 2001-06-28 Orsense Ltd. A method of optical measurements for determining various parameters of the patient's blood
US6419671B1 (en) 1999-12-23 2002-07-16 Visx, Incorporated Optical feedback system for vision correction
US6594513B1 (en) 2000-01-12 2003-07-15 Paul D. Jobsis Method and apparatus for determining oxygen saturation of blood in body organs
IL135077A0 (en) * 2000-03-15 2001-05-20 Orsense Ltd A probe for use in non-invasive measurements of blood related parameters
EP2322085B1 (en) 2000-04-17 2014-03-12 Covidien LP Pulse oximeter sensor with piece-wise function
US6449501B1 (en) * 2000-05-26 2002-09-10 Ob Scientific, Inc. Pulse oximeter with signal sonification
US6889153B2 (en) * 2001-08-09 2005-05-03 Thomas Dietiker System and method for a self-calibrating non-invasive sensor
IL138683A0 (en) * 2000-09-25 2001-10-31 Vital Medical Ltd Apparatus and method for monitoring tissue vitality parameters
IL138884A (en) * 2000-10-05 2006-07-05 Conmed Corp Pulse oximeter and a method of its operation
US6466809B1 (en) 2000-11-02 2002-10-15 Datex-Ohmeda, Inc. Oximeter sensor having laminated housing with flat patient interface surface
US6505133B1 (en) * 2000-11-15 2003-01-07 Datex-Ohmeda, Inc. Simultaneous signal attenuation measurements utilizing code division multiplexing
US20020068859A1 (en) 2000-12-01 2002-06-06 Knopp Christina A. Laser diode drive scheme for noise reduction in photoplethysmographic measurements
US6501974B2 (en) 2001-01-22 2002-12-31 Datex-Ohmeda, Inc. Compensation of human variability in pulse oximetry
JP2002224088A (ja) 2001-02-01 2002-08-13 Unitec Denshi Kk 血中酸素飽和度測定装置
US6606509B2 (en) 2001-03-16 2003-08-12 Nellcor Puritan Bennett Incorporated Method and apparatus for improving the accuracy of noninvasive hematocrit measurements
US6591122B2 (en) * 2001-03-16 2003-07-08 Nellcor Puritan Bennett Incorporated Device and method for monitoring body fluid and electrolyte disorders
US7239902B2 (en) 2001-03-16 2007-07-03 Nellor Puritan Bennett Incorporated Device and method for monitoring body fluid and electrolyte disorders
US6898451B2 (en) * 2001-03-21 2005-05-24 Minformed, L.L.C. Non-invasive blood analyte measuring system and method utilizing optical absorption
US20020156354A1 (en) 2001-04-20 2002-10-24 Larson Eric Russell Pulse oximetry sensor with improved spring
ATE369787T1 (de) 2001-06-20 2007-09-15 Purdue Research Foundation Druckmanschette mit körperbeleuchtung zur verwendung bei der optischen nichtinvasiven messung von blutparametern
SG126677A1 (en) 2001-06-26 2006-11-29 Meng Ting Choon Method and device for measuring blood sugar level
US6697658B2 (en) * 2001-07-02 2004-02-24 Masimo Corporation Low power pulse oximeter
DE10139379A1 (de) * 2001-08-10 2003-03-06 Siemens Ag Vorrichtung zum Erfassen einer Bewegung
US6654621B2 (en) 2001-08-29 2003-11-25 Bci, Inc. Finger oximeter with finger grip suspension system
US6668183B2 (en) 2001-09-11 2003-12-23 Datex-Ohmeda, Inc. Diode detection circuit
IL145445A (en) * 2001-09-13 2006-12-31 Conmed Corp A method for signal processing and a device for improving signal for noise
US7162306B2 (en) * 2001-11-19 2007-01-09 Medtronic Physio - Control Corp. Internal medical device communication bus
JP3709836B2 (ja) 2001-11-20 2005-10-26 コニカミノルタセンシング株式会社 血液成分測定装置
JP3858678B2 (ja) * 2001-11-20 2006-12-20 コニカミノルタセンシング株式会社 血液成分測定装置
JP2003194714A (ja) 2001-12-28 2003-07-09 Omega Wave Kk 生体組織血液量測定装置
JP2003210438A (ja) 2002-01-22 2003-07-29 Tyco Healthcare Japan Inc オキシメーター用アダプター
US6822564B2 (en) * 2002-01-24 2004-11-23 Masimo Corporation Parallel measurement alarm processor
JP2005528134A (ja) 2002-01-31 2005-09-22 ビーティージー・インターナショナル・リミテッド 静脈の酸素測定法、静脈の脈動酸素測定法
JP4031438B2 (ja) * 2002-02-14 2008-01-09 俊徳 加藤 生体機能診断装置
WO2003071939A1 (en) 2002-02-22 2003-09-04 Masimo Corporation Active pulse spectraphotometry
EP1482830A1 (en) 2002-03-01 2004-12-08 Terry Beaumont Ear canal sensing device
US6863652B2 (en) * 2002-03-13 2005-03-08 Draeger Medical Systems, Inc. Power conserving adaptive control system for generating signal in portable medical devices
DE10213692B4 (de) 2002-03-27 2013-05-23 Weinmann Diagnostics Gmbh & Co. Kg Verfahren zur Steuerung einer Vorrichtung und Vorrichtung zur Messung von Inhaltsstoffen im Blut
US6690958B1 (en) * 2002-05-07 2004-02-10 Nostix Llc Ultrasound-guided near infrared spectrophotometer
US6930608B2 (en) 2002-05-14 2005-08-16 Motorola, Inc Apparel having multiple alternative sensors and corresponding method
US6711425B1 (en) * 2002-05-28 2004-03-23 Ob Scientific, Inc. Pulse oximeter with calibration stabilization
JP4040913B2 (ja) 2002-06-07 2008-01-30 株式会社パルメディカル 非観血動静脈酸素飽和度測定装置
US6909912B2 (en) 2002-06-20 2005-06-21 University Of Florida Non-invasive perfusion monitor and system, specially configured oximeter probes, methods of using same, and covers for probes
US7024235B2 (en) * 2002-06-20 2006-04-04 University Of Florida Research Foundation, Inc. Specially configured nasal pulse oximeter/photoplethysmography probes, and combined nasal probe/cannula, selectively with sampler for capnography, and covering sleeves for same
US7621877B2 (en) * 2002-07-15 2009-11-24 Itamar Medical Ltd. Body surface probe, apparatus and method for non-invasively detecting medical conditions
JP2004113353A (ja) 2002-09-25 2004-04-15 Citizen Watch Co Ltd 血液分析装置
WO2004047631A2 (en) * 2002-11-22 2004-06-10 Masimo Laboratories, Inc. Blood parameter measurement system
JP3944448B2 (ja) 2002-12-18 2007-07-11 浜松ホトニクス株式会社 血液測定装置
JP4284674B2 (ja) 2003-01-31 2009-06-24 日本光電工業株式会社 血中吸光物質濃度測定装置
JP4509099B2 (ja) 2003-02-05 2010-07-21 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 指用医療センサ
JP2004248819A (ja) 2003-02-19 2004-09-09 Citizen Watch Co Ltd 血液分析装置
US8255029B2 (en) 2003-02-27 2012-08-28 Nellcor Puritan Bennett Llc Method of analyzing and processing signals
JP2004261364A (ja) 2003-02-28 2004-09-24 Hamamatsu Photonics Kk 濃度情報測定装置
JP2004290545A (ja) 2003-03-28 2004-10-21 Citizen Watch Co Ltd 血液分析装置
US6947780B2 (en) 2003-03-31 2005-09-20 Dolphin Medical, Inc. Auditory alarms for physiological data monitoring
KR100571811B1 (ko) * 2003-05-09 2006-04-17 삼성전자주식회사 귀속형 생체 신호 측정 장치
US7047056B2 (en) 2003-06-25 2006-05-16 Nellcor Puritan Bennett Incorporated Hat-based oximeter sensor
WO2005009221A2 (en) 2003-07-21 2005-02-03 The Titan Corporation Data acquisition system for pulse oximeters
US7500950B2 (en) * 2003-07-25 2009-03-10 Masimo Corporation Multipurpose sensor port
US8602986B2 (en) 2003-08-20 2013-12-10 Koninklijke Philips N.V. System and method for detecting signal artifacts
US7373193B2 (en) * 2003-11-07 2008-05-13 Masimo Corporation Pulse oximetry data capture system
US20050113651A1 (en) * 2003-11-26 2005-05-26 Confirma, Inc. Apparatus and method for surgical planning and treatment monitoring
US20050267346A1 (en) 2004-01-30 2005-12-01 3Wave Optics, Llc Non-invasive blood component measurement system
CA2555807A1 (en) 2004-02-12 2005-08-25 Biopeak Corporation Non-invasive method and apparatus for determining a physiological parameter
US7190985B2 (en) 2004-02-25 2007-03-13 Nellcor Puritan Bennett Inc. Oximeter ambient light cancellation
US7277741B2 (en) 2004-03-09 2007-10-02 Nellcor Puritan Bennett Incorporated Pulse oximetry motion artifact rejection using near infrared absorption by water
US20050228248A1 (en) 2004-04-07 2005-10-13 Thomas Dietiker Clip-type sensor having integrated biasing and cushioning means
US7551950B2 (en) * 2004-06-29 2009-06-23 O2 Medtech, Inc,. Optical apparatus and method of use for non-invasive tomographic scan of biological tissues
US7343186B2 (en) * 2004-07-07 2008-03-11 Masimo Laboratories, Inc. Multi-wavelength physiological monitor
US7548771B2 (en) 2005-03-31 2009-06-16 Nellcor Puritan Bennett Llc Pulse oximetry sensor and technique for using the same on a distal region of a patient's digit
JP3170866U (ja) 2011-07-22 2011-10-06 和行 久保田 バラエティバッグ

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102713569A (zh) * 2010-01-28 2012-10-03 霍夫曼-拉罗奇有限公司 尤其是用于血糖确定的测量系统和测量方法
CN102713569B (zh) * 2010-01-28 2014-12-31 霍夫曼-拉罗奇有限公司 尤其是用于血糖确定的测量系统和测量方法
CN102512178A (zh) * 2011-12-23 2012-06-27 深圳市理邦精密仪器股份有限公司 一种血氧测量装置和方法
CN102512178B (zh) * 2011-12-23 2014-04-09 深圳市理邦精密仪器股份有限公司 一种血氧测量装置
CN103271745A (zh) * 2013-06-07 2013-09-04 秦皇岛市康泰医学系统有限公司 一种脉搏血氧仿真系统及实现方法
CN103271745B (zh) * 2013-06-07 2015-05-20 康泰医学系统（秦皇岛）股份有限公司 一种脉搏血氧仿真系统及实现方法
CN104706336A (zh) * 2014-12-31 2015-06-17 歌尔声学股份有限公司 一种光电式脉搏信号测量方法、装置及测量设备
US9949695B2 (en) 2014-12-31 2018-04-24 Goertek Inc. Photoelectric type pulse signal measuring method and apparatus
CN106031639A (zh) * 2015-03-07 2016-10-19 上海贝瑞电子科技有限公司 一种高精度血氧检测管理方法及系统
CN115266583A (zh) * 2022-07-16 2022-11-01 北京津发科技股份有限公司 环境光滤除方法、系统、计算机设备及计算机可读存储介质

Also Published As

Publication number Publication date
AU2005216985A1 (en) 2005-09-09
CA2556748A1 (en) 2005-09-09
KR20070024488A (ko) 2007-03-02
EP1722675B1 (en) 2008-08-06
US20130123593A1 (en) 2013-05-16
ATE403397T1 (de) 2008-08-15
US7190985B2 (en) 2007-03-13
ES2311980T3 (es) 2009-02-16
US8315684B2 (en) 2012-11-20
CA2556748C (en) 2013-02-12
US8874181B2 (en) 2014-10-28
US20060264721A1 (en) 2006-11-23
US20090005662A1 (en) 2009-01-01
WO2005082242A1 (en) 2005-09-09
JP2007523717A (ja) 2007-08-23
US7400919B2 (en) 2008-07-15
DE602005008718D1 (de) 2008-09-18
EP1722675A1 (en) 2006-11-22
MXPA06009755A (es) 2007-03-15
US20050187448A1 (en) 2005-08-25

Similar Documents

Publication Publication Date Title
CN1933769A (zh) 血氧计环境光取消
US7403806B2 (en) System for prefiltering a plethysmographic signal
US5193543A (en) Method and apparatus for measuring arterial blood constituents
CN104507381B (zh) 光电体积描记设备和方法
US4863265A (en) Apparatus and method for measuring blood constituents
CA2260928C (en) Direct to digital oximeter
US4773422A (en) Single channel pulse oximeter
US7215985B2 (en) Oximeter cross-talk reduction
US5645060A (en) Method and apparatus for removing artifact and noise from pulse oximetry
CA2179023C (en) Medical sensor with amplitude independent output
JP4454854B2 (ja) パルス式計測システムにおける信号復調方法および装置
US20130278430A1 (en) Interference detector for patient monitor
CN1933770A (zh) 用于输出生理信号的模拟表示的δ－σ调制器
CN107595296B (zh) 一种消除运动干扰的血氧饱和度检测方法及血氧检测装置
KR970006916B1 (ko) 동맥 혈액 성분 측정용 산소 측정 장치 및 그 방법
US10765375B2 (en) Physiological monitoring methods and systems utilizing filter scaling
CN107427240B (zh) 光学分析系统和方法
EP3434182A1 (en) System for monitoring the blood supply to the transplanted organ
AU770773B2 (en) Direct to digital oximeter and method for calculating oxygenation levels
RU75294U1 (ru) Цифровой фотоплетизмограф с функцией спектрирования
KR20000075056A (ko) 산소포화도 및 혈류량 광센서 시스템
CZ31012U1 (cs) Systém monitorování krevního zásobování transplantovaného orgánu
US20120029330A1 (en) Cable cross talk suppression

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication