中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

300 records (took 0.026 seconds)

    Pulse oximeter with parallel saturation calculation modules
    62.
    发明申请
    Pulse oximeter with parallel saturation calculation modules 有权
    具有并联饱和度计算模块的脉搏血氧计

    公开(公告)号：US20040181134A1

    公开(公告)日：2004-09-16

    申请号：US10806647

    申请日：2004-03-22

    Applicant: Nellcor Puritan Bennett Incorporated

    Inventor： Clark R. Baker JR. ,  Thomas J. Yorkey

    IPC: A61B005/00

    CPC classification number: A61B5/7203 ,  A61B5/0075 ,  A61B5/024 ,  A61B5/02416 ,  A61B5/14551 ,  A61B5/14552 ,  A61B5/7207 ,  A61B5/7239 ,  A61B5/725 ,  G06F19/00 ,  H03H21/003

    Abstract: A method and apparatus for reducing the effects of noise on a system for measuring physiological parameters, such as, for example, a pulse oximeter. The method and apparatus of the invention take into account the physical limitations on various physiological parameters being monitored when weighting and averaging a series of measurements. Varying weights are assigned different measurements, measurements are rejected, and the averaging period is adjusted according to the reliability of the measurements. Similarly, calculated values derived from analyzing the measurements are also assigned varying weights and averaged over adjustable periods. More specifically, a general class of filters such as, for example, Kalman filters, is employed in processing the measurements and calculated values. The filters use mathematical models which describe how the physiological parameters change in time, and how these parameters relate to measurement in a noisy environment. The filters adaptively modify a set of averaging weights to optimally estimate the physiological parameters.

    Abstract translation: 一种用于减少噪声对用于测量生理参数的系统的影响的方法和装置，例如脉搏血氧计。 本发明的方法和装置考虑到当加权和平均一系列测量时监测的各种生理参数的物理限制。 不同的权重被分配不同的测量，测量被拒绝，平均期间根据测量的可靠性进行调整。 类似地，从分析测量得到的计算值也被赋予变化的权重并且在可调周期上平均。 更具体地，在处理测量值和计算值时，采用一般的滤波器类，例如卡尔曼滤波器。 过滤器使用描述生理参数如何随时间变化的数学模型，以及这些参数如何与嘈杂环境中的测量相关。 滤波器自适应地修改一组平均权重以最佳地估计生理参数。

    Pulse oximeter sensor with piece-wise function
    63.
    发明申请
    Pulse oximeter sensor with piece-wise function 有权

    公开(公告)号：US20040171920A1

    公开(公告)日：2004-09-02

    申请号：US10798596

    申请日：2004-03-10

    Applicant: Nellcor Puritan Bennett Incorporated

    Inventor： Paul D. Mannheimer ,  Michael E. Fein ,  Charles E. Porges

    IPC: A61B005/00

    CPC classification number: A61B5/14551 ,  A61B2562/085

    Abstract: A memory in a sensor is used to store multiple coefficients for a physiological parameter. In one embodiment, not only are the sensor's specific calibration coefficients stored in a memory in the sensor for the formula to determine oxygen saturation, but multiple sets of coefficients are stored. The multiple sets apply to different ranges of saturation values to provide a better fit to occur by breaking the R to SpO2 relationship up into different pieces, each described by a different function. The different functions can also be according to different formulas for determining oxygen saturation.

    Shunt barrier in pulse oximeter sensor
    64.
    发明申请
    Shunt barrier in pulse oximeter sensor 有权
    脉搏血氧饱和度传感器中的分流屏障

    公开(公告)号：US20010000790A1

    公开(公告)日：2001-05-03

    申请号：US09750670

    申请日：2000-12-28

    Applicant: Nellcor Puritan Bennett Incorporated

    Inventor： Russ Delonzor ,  Paul D. Mannheimer ,  Michael E. Fein ,  Don Hannula

    IPC: A61B005/00

    CPC classification number: A61B5/6826 ,  A61B5/14552 ,  A61B5/6838 ,  A61B2562/08

    Abstract: A pulse oximeter sensor having an emitter(s) and a detector, with a layer having a first portion of the emitter and a second portion of layer over the detector is provided. A barrier is included between the first and second portions of the overlying layer to substantially block radiation of the wavelengths emitted by the emitter(s). Preferably, the barrier reduces the radiation shunted to less than 10% of the radiation detected, and more preferably to less than 1% of the radiation detected.

    Abstract translation: 具有发射器和检测器的脉冲血氧计传感器，其具有发射器的第一部分和检测器上的第二部分层的层。 在上覆层的第一和第二部分之间包括屏障，以基本上阻挡由发射器发射的波长的辐射。 优选地，屏障将被分流的辐射减少到所检测的辐射的小于10％，更优选地小于检测到的辐射的1％。

    Pulse oximeter with separate ensemble averaging for oxygen saturation and heart rate
    67.
    发明专利
    Pulse oximeter with separate ensemble averaging for oxygen saturation and heart rate 未知

    公开(公告)号：AU2005221651A1

    公开(公告)日：2005-09-22

    申请号：AU2005221651

    申请日：2005-03-07

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： BAKER CLARK R JR

    IPC: A61B5/00 ,  G01N21/31

    Abstract: The use of two separate ensemble averagers for processing a detected waveform for use in calculating oxygen saturation and a pulse rate. The ensemble averager used for calculating oxygen saturation operates on a signal which has been normalized, while the ensemble averager for the pulse rate calculation operates on a signal which has not been normalized. The metrics chosen for the two paths through the two ensemble averagers can be varied to optimize the ensemble averaging for oxygen saturation or pulse rate calculations.

    Multi-bit ADC with sigma-delta modulation
    68.
    发明专利
    Multi-bit ADC with sigma-delta modulation 未知

    公开(公告)号：AU2005216956A1

    公开(公告)日：2005-09-09

    申请号：AU2005216956

    申请日：2005-02-24

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： SHEA WILLIAM ,  CHEW BRADFORD B ,  PETERSEN ETHAN

    IPC: A61B5/00 ,  H03M3/04

    Abstract: There is provided a pulse oximeter circuit including a feedback circuit configured to receive a digital output signal of a multi-bit sigma-delta modulator and generate a pulse width modulated signal (PWM). The PWM signal is directed to a first switching circuit and a D flip-flop. The first switching circuit provides a first or second reference voltage as a feedback signal to the multi-bit sigma-delta modulator. The D flip-flop generates a sample and hold signal. The sample and hold signal controls a second switching circuit coupled to the input of the multi-bit sigma-delta modulator.

    Motion compatible sensor for non-invasive optical blood analysis
    70.
    发明专利
    Motion compatible sensor for non-invasive optical blood analysis 未知

    公开(公告)号：AU4666397A

    公开(公告)日：1998-05-05

    申请号：AU4666397

    申请日：1997-10-02

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： CHIN RODNEY ,  MANNHEIMER PAUL ,  FLEWELLING ROSS

    IPC: A61B5/145 ,  A61B5/00 ,  A61B5/1455 ,  A61B5/1464 ,  A61B5/1495

    Abstract: A non-invasive optical sensor which uses the motion signal to calculate the physiological characteristic being measured. For pulse oximetry, a least squares or a ratio-of-ratios technique can be applied to the motion signal itself. This is made possible by selecting a site on the patient where variations in motion produce signals of two wavelengths which are sufficiently correlated. In particular, it has been determined that a sensor placed on a nail, in particular a thumbnail, exhibits the characteristics of having the red and infrared signals correlated when used for pulse oximetry, and the resulting signals correlate to arterial oxygen saturation.

Patent Agency Ranking