公开(公告)号：US5490515A

公开(公告)日：1996-02-13

申请号：US297496

申请日：1994-08-29

Applicant: David W. Mortara

Inventor： David W. Mortara

IPC: A61B5/0428 ,  G06F17/00

CPC classification number: A61B5/0428

Abstract: An apparatus and method directed to an adaptive noise filtering arrangement. The arrangement has the ability to estimate a first set of data for a first time-dependent variable based upon at least two sets of data for two time-dependent variables related to the first time-dependent variable. Additionally, the arrangement has the ability to filter an actual set of data for the first time-dependent variable based upon the first set of data and the actual set of data. The estimated first set of data and filtered actual set of data can be printed or displayed in a graphical format for analysis.

Abstract translation: 一种针对自适应噪声滤波装置的装置和方法。 该装置能够基于与第一时间依赖变量相关的两个时间相关变量的至少两组数据来估计第一时间相关变量的第一组数据。 此外，该装置能够基于第一组数据和实际的数据集合来过滤第一时间依赖变量的实际数据集。 估计的第一组数据和滤波后的实际数据集可以打印或显示为图形格式进行分析。

公开(公告)号：US5421342A

公开(公告)日：1995-06-06

申请号：US71337

申请日：1993-06-02

Applicant: David W. Mortara

Inventor： David W. Mortara

IPC: A61B5/0428 ,  G06F17/00

CPC classification number: A61B5/0428

Abstract: An apparatus and method directed to an adaptive noise filtering arrangement. The arrangement has the ability to estimate a first set of data for a first time-dependent variable based upon at least two sets of data for two time-dependent variables related to the first time-dependent variable. Additionally, the arrangement has the ability to filter an actual set of data for the first time-dependent variable based upon the first set of data and the actual set of data. The estimated first set of data and filtered actual set of data can be printed or displayed in a graphical format for analysis.

Abstract translation: 一种针对自适应噪声滤波装置的装置和方法。 该装置能够基于与第一时间依赖变量相关的两个时间相关变量的至少两组数据来估计第一时间相关变量的第一组数据。 此外，该装置能够基于第一组数据和实际的数据集合来过滤第一时间依赖变量的实际数据集。 估计的第一组数据和滤波后的实际数据集可以打印或显示为图形格式进行分析。

公开(公告)号：US4090505A

公开(公告)日：1978-05-23

申请号：US691536

申请日：1976-06-01

Applicant: David W. Mortara

Inventor： David W. Mortara

IPC: A61B5/0432 ,  G06F17/00 ,  A61B5/04

CPC classification number: A61B5/0432 ,  A61B5/7232

Abstract: A method and means for graphically recording electrocardiographic data reduces the amount of redundant data displayed so as to reduce the size of the electrocardiogram. However, arrhythmias and other aberrant ekg signal complexes are reproduced in context for diagnostic purposes. Typical or normal signal complexes received from the patient are used to establish an ekg signal complex pattern. In the absence of aberrant signal complexes, this pattern is recorded in lieu of the patient data at a speed which is less than the normal recording speed to form the electrocardiogram. One such pattern may be recorded for every 25 complexes in the patient data, thereby achieving the reduction in the size of electrocardiogram. When an aberrant signal complex occurs, it is entered in the electrocardiogram at the normal higher recording speed. For repetitiously occurring aberrant signal complexes, only certain occurrences of such aberrancies are entered in the electrocardiogram. The proportionality of aberrant to normal signal complexes appearing in the electrocardiogram is thus maintained the same as that appearing in the electrocardiographic data from the patient.

Abstract translation: 用于图形记录心电图数据的方法和装置减少显示的冗余数据的数量，以便减小心电图的大小。 然而，心律失常和其他异常ekg信号复合物在上下文中被复制用于诊断目的。 使用从患者接收的典型或正常信号复合物建立ekg信号复合体模式。 在没有异常信号复合物的情况下，以低于正常记录速度的速度记录该模式代替患者数据以形成心电图。 可以在患者数据中每25个复合物记录一个这样的模式，从而实现心电图尺寸的减小。 当出现异常信号复合时，以正常较高的记录速度进入心电图。 对于重复发生的异常信号复合物，只有某些发生的这种异常进入心电图。 因此，出现在心电图中的异常与正常信号复合体的比例保持与来自患者的心电图数据中出现的相同。

公开(公告)号：US06850796B1

公开(公告)日：2005-02-01

申请号：US09634271

申请日：2000-08-08

Applicant: David W. Mortara

Inventor： David W. Mortara

IPC: A61B5/0452

CPC classification number: A61B5/0452

Abstract: A method of identifying and measuring altemans in an electrocardiographic (ECG) signal representative of the electric activity of a heart of a patient. The ECG signals from the patient are divided into individual cardiac cycles and the amplitude of four segments of the repolarization portion and the depolarization portion of each cardiac cycle are measured. The amplitude for each of the repolarization segments are measured from a reference baseline that is determined by a first base segment occurring immediately prior to the repolarization portion of the present cardiac cycle and a second base segment occurring immediately before the depolarization portion of the next cardiac cycle in the sequence. Based upon the amplitude measurements over the repolarization and the depolarization portions of each cardiac cycle, digital signal processing is applied to the measurements to generate eigenvariables. A spectral density is calculated for each of the eigenvariables, which spectral densities can be used to determine both the presence of altemans and the respiratory frequency.

Abstract translation: 在代表患者心脏的电活动的心电图（ECG）信号中识别和测量阿尔特曼的方法。 来自患者的ECG信号被分成单独的心脏周期，并且测量每个心动周期的复极部分和去极化部分的四个段的振幅。 每个复极区段的幅度是从参考基线测量的，该参考基线由紧邻该心动周期的复极部分之前发生的第一基区段和紧邻下一心动周期的去极化部分之前发生的第二基区段确定 顺序。 基于对每个心动周期的复极化和去极化部分的振幅测量，数字信号处理被应用于测量以产生特征变量。 为每个特征变量计算频谱密度，该频谱密度可用于确定阿尔特曼的存在和呼吸频率。

公开(公告)号：US06564077B2

公开(公告)日：2003-05-13

申请号：US09974279

申请日：2001-10-10

Applicant: David W. Mortara

Inventor： David W. Mortara

IPC: A61B500

CPC classification number: A61B5/14551

Abstract: An apparatus for determining the oxygenation of blood. The apparatus includes a detector that is configured to sense a first signal of a first wavelength, the first signal having a first arterial blood component and a first noise component. The detector is also configured to sense a second signal of a second wavelength, the second signal having a second arterial blood component and a second noise component. The first arterial blood component is related to the second arterial blood component by an arterial blood absorption ratio and the first noise component is related to the second noise component by a noise absorption ratio. The apparatus also includes a controller that is configured to determine a value of the noise absorption ratio that maximizes the magnitude of an autocorrelation function. The controller is further configured to determine the oxygenation of blood from the noise absorption ratio.

Abstract translation: 一种用于测定血液氧合的装置。 所述装置包括被配置为感测第一波长的第一信号的检测器，所述第一信号具有第一动脉血液成分和第一噪声分量。 检测器还被配置为感测第二波长的第二信号，第二信号具有第二动脉血液成分和第二噪声分量。 第一动脉血成分通过动脉血吸收率与第二动脉血成分相关，并且第一噪声成分与第二噪声成分相关，具有噪声吸收率。 该装置还包括控制器，其被配置为确定最大化自相关函数的幅度的噪声吸收率的值。 所述控制器还被配置成从所述噪声吸收比确定血液的氧合。

公开(公告)号：US5704351A

公开(公告)日：1998-01-06

申请号：US396151

申请日：1995-02-28

Applicant: David W. Mortara ,  Brian E. Sueppel

Inventor： David W. Mortara ,  Brian E. Sueppel

IPC: A61B5/00 ,  A61B5/0424 ,  A61N1/37 ,  A61N1/372 ,  A61N5/00

CPC classification number: A61N1/3727 ,  A61B5/0006 ,  A61B5/0424 ,  A61B5/7232 ,  Y10S128/904

Abstract: A digital telemetry transmitter for transmitting eight channels of diagnostic quality electrocardiographic data has input circuitry for receiving analog EKG signals originating at electrodes on the patient. The input circuitry includes a circuit for ascertaining the impedance of the electrode connection to the patient and to indicate an electrode fault. EKG signals from the input circuit are provided to a digital/analog converter for converting the analog signals into corresponding digital signals. The analog/digital converter may comprise an eight channel, 20-bit converter, sampling the input signals at a frequency of 10 KHz and providing a digital output signal having a frequency of 500 Hz. The output of the analog/digital converter is provided to a microprocessor control which provides a digital EKG modulating output signal. The output signal is periodically inverted to avoid stationarity in the transmitted data. The output signal includes error correction data that enables a receiver for the transmitted data to correct the digital EKG signal for noise. The microprocessor control changes the resolution of the transmitter when large signal changes occur in the data to accommodate such signals and to provide data compression. An rf signal generator generates an rf carrier signal. The modulating output signal of the microprocessor control is provided as a frequency modulating signal to the rf signal generator. The rf signal generator is stabilized against alterations due to reflected antenna loading.

Abstract translation: 用于发送八通道诊断质量心电图数据的数字遥测发射器具有用于接收源自患者电极的模拟EKG信号的输入电路。 输入电路包括用于确定与患者的电极连接的阻抗并指示电极故障的电路。 来自输入电路的EKG信号被提供给用于将模拟信号转换成相应的数字信号的数/模转换器。 模拟/数字转换器可以包括八通道20位转换器，以10KHz的频率对输入信号进行采样，并提供具有500Hz频率的数字输出信号。 模拟/数字转换器的输出被提供给提供数字EKG调制输出信号的微处理器控制。 周期性地反转输出信号以避免发送数据中的平稳性。 输出信号包括纠错数据，使得接收机能够发送数据，以校正数字EKG信号的噪声。 当在数据中发生大的信号变化以适应这种信号并提供数据压缩时，微处理器控制改变发射机的分辨率。 rf信号发生器产生rf载波信号。 微处理器控制的调制输出信号作为频率调制信号提供给rf信号发生器。 rf信号发生器由于反射天线负载而被稳定而不能改变。

公开(公告)号：US06697655B2

公开(公告)日：2004-02-24

申请号：US09972077

申请日：2001-10-05

Applicant: Brian E. Sueppel ,  David W. Mortara

Inventor： Brian E. Sueppel ,  David W. Mortara

IPC: A61B500

CPC classification number: A61B5/14551 ,  A61B2560/0209

Abstract: A low power pulse oximeter includes an input stage for amplifying a signal received from a light detector that is switchably connected to the power supply that powers the amplifier. The oximeter also includes an output stage with an LED driver circuit that is switchably connected to the power supply that powers the LED driver circuit. The input and output stages are switchably connected to the power supply when measurements need to be taken. When measurements do not need to be taken, they are switched off to reduce the power consumption of the oximeter.

Abstract translation: 低功率脉搏血氧计包括用于放大从光检测器接收的信号的输入级，该检测器可切换地连接到为放大器供电的电源。 血氧计还包括具有LED驱动电路的输出级，该LED驱动器电路可切换地连接到为LED驱动器电路供电的电源。 当需要进行测量时，输入和输出级可切换地连接到电源。 当不需要进行测量时，它们被关闭以降低血氧计的功率消耗。

公开(公告)号：US4951681A

公开(公告)日：1990-08-28

申请号：US271106

申请日：1988-11-14

Applicant: David W. Mortara

Inventor： David W. Mortara

IPC: A61B5/0432 ,  G01D9/28

CPC classification number: A61B5/0432 ,  G01D9/285

Abstract: Disclosed herein is a method and apparatus employing a D.C. drive motor and digital printhead for recording electrocardiographic data or other digital data on a chart at a constant time scale, regardless of temporary variations in the D.C. motor speed. A buffer memory stores sensed digital ECG data, and a data count register provides a count indicative of the amount of data stored. A pulse width register controls the width of long and short pulses generated by a motor driver for the selected paper speed. An experience count register has a count indicative of the relative number of long and short pulses generated. The original or current width of the pulses may be adjusted by the pulse width register, subject to the count of the experience count register, for controlling the speed of the D.C. drive motor. The motor speed is increased if the buffer memory is storing more than a preselected amount of data, and the motor speed is decreased if the buffer memory is storing less than a preselected amount of data. Means, including a tach count register, regulate the output of ECG data from the buffer memory to the digital printhead for recording at a rate proportional to the speed of the D.C. drive motor, to produce a constant time scale chart record of such data, regardless of temporary variations in the D.C. motor speed.

Abstract translation: 本文公开了一种使用直流驱动电动机和数字打印头的方法和装置，其用于以恒定时间尺度在图表上记录心电图数据或其他数字数据，而不管直流电动机速度的暂时变化。 缓冲存储器存储感测的数字ECG数据，并且数据计数寄存器提供指示存储的数据量的计数。 脉冲宽度寄存器控制电机驱动器针对所选纸张速度产生的长脉冲和短脉冲宽度。 体验计数寄存器具有表示产生的长脉冲和短脉冲的相对数的计数。 脉冲的原始或当前宽度可以通过脉冲宽度寄存器进行调整，受经验计数寄存器的计数，用于控制直流驱动电机的速度。 如果缓冲存储器存储超过预先选择的数据量，则电机速度会增加，如果缓冲存储器存储少于预选量的数据，则电机速度降低。 包括计数寄存器在内的方法是将ECG数据从缓冲存储器输出到数字打印头，以与直流驱动电机的速度成比例的速度进行记录，以产生这种数据的恒定时间刻度图记录 直流电机速度暂时变化。

公开(公告)号：US4800364A

公开(公告)日：1989-01-24

申请号：US57686

申请日：1987-05-27

Applicant: David W. Mortara

Inventor： David W. Mortara

IPC: H03M1/00 ,  H03M1/46

CPC classification number: H03M1/0639 ,  H03M1/16 ,  H03M1/20 ,  H03M1/50

Abstract: An analog-to-digital converter (ADC) controlled in a manner to increase its precision. The signal to be digitized is one input to an analog signal summing means whose output is the input to the ADC. A stepped or dither voltage signal is applied to the other summing means input during each analog signal sampling period of the ADC. The dither voltage steps are equal to the voltage equivalent of one ADC count plus 1/N where N is the number of steps per ADC count chosen to obtain a desired degree of precision in the digital signals that are output by the ADC. The dither voltage step that is combined with the current analog signal sample in the summing means amounts to displacing the sample in steps within each count of the ADC. The ADC converts each combined signal during a sampling interval to a succession of binary digital values which are summed. The result of the summation is a binary number having a value that corresponds more precisely to the true value of the analog signal samples than would be the case if they were converted directly by the ADC.

Abstract translation: 以提高其精度的方式控制的模拟 - 数字转换器（ADC）。 要被数字化的信号是模拟信号求和装置的一个输入，其输出是ADC的输入。 在ADC的每个模拟信号采样周期期间，向另一求和装置输入阶跃或抖动电压信号。 抖动电压步长等于一个ADC计数加上1 / N的等效电压，其中N是为了在ADC输出的数字信号中获得所需的精度而选择的每个ADC计数的步数。 与求和装置中的当前模拟信号样本组合的抖动电压步长相当于在ADC的每个计数内逐步移位样本。 ADC将采样间隔期间的每个组合信号转换成相加的二进制数字值。 求和的结果是一个二进制数，其值比模拟信号样本的真实值更精确地对应，与直接由ADC直接转换的情况相反。

公开(公告)号：US4630204A

公开(公告)日：1986-12-16

申请号：US582225

申请日：1984-02-21

Applicant: David W. Mortara

Inventor： David W. Mortara

IPC: A61B5/0472 ,  A61B5/04 ,  A61B5/0452 ,  G06F17/00 ,  G06Q50/00 ,  G06F15/42

CPC classification number: A61B5/0464 ,  A61B5/7264 ,  A61B5/7225 ,  Y10S128/901

Abstract: A waveform processor for processing waveforms of the ECG type from surface electrodes connected to the human body. Differential lead waveforms are sampled by a fast, high resolution A/D converter which are thereafter provided to a preprocessor where filtering and a reconstruction of the leads waveforms takes place. The waveforms are then detected, classified, and averaged to form composites of the X, Y, and Z terminal leads. Special filtering is used to detect the high frequency low amplitude features of the composite waveforms.

Abstract translation: 一种波形处理器，用于从连接到人体的表面电极处理ECG类型的波形。 差分引线波形由快速，高分辨率的A / D转换器采样，其后提供给预处理器，其中发生滤波和重构引线波形。 然后检测，分类和平均波形以形成X，Y和Z端子引线的复合材料。 特殊滤波用于检测复合波形的高频低振幅特征。