公开(公告)号：US06405076B1

公开(公告)日：2002-06-11

申请号：US09364272

申请日：1999-07-29

申请人： Lee A. Taylor ,  Ronald G. Bennett ,  Thomas J. Dorsett

发明人： Lee A. Taylor ,  Ronald G. Bennett ,  Thomas J. Dorsett

IPC分类号： A61B502

CPC分类号： A61B5/0205 ,  A61B5/022 ,  A61B5/0245 ,  A61B5/04017 ,  A61B5/7203 ,  G06F19/00 ,  Y10S128/901

摘要： An artifact rejector for repetitive physiologic-event-signal data generated from electronically-controlled physiologic-event-measuring equipment includes a physiologic-event-signal averager in communication with such physiologic-event-measuring equipment. The artifact rejector is constructed to generate and store repetitive averaged physiologic-event-signal data based upon a substantially stable time relationship between corresponding physiologic-event-signal data and heart-beat-related-signal data. The repetitive averaged physiologic-event-signal data includes less noise than the repetitive physiologic-event-signal data. The artifact rejector generates and continuously updates an averaged-data template by storing such repetitive averaged physiologic-event-signal data for a preselected number of measured physiologic events. The artifact rejector also includes a physiologic-event-noise estimator and a physiologic-event-noise monitor in communication with such physiologic-event-measuring equipment, and capable of instructing the monitor to adjust the measurement cycle based upon estimated, monitored noise. The averager preferably includes a sharp roll-off, low pass filter and examples include a fourth-order Bessel filter, two cascaded, identical second-order Bessel filters, an elliptic filter, a Tchetschebyscheff filter, or finite impulse response filters. The heart-beat-related signal is preferably an ECG signal. A method of artifact rejection includes generating and storing repetitive averaged physiologic-event-signal data based upon a substantially stable time relationship between corresponding physiologic-event-signal data and heart-beat-related-signal data, with the repetitive averaged physiologic-event-signal data including less noise than the repetitive physiologic-event-signal data.

摘要翻译： 用于由电子控制的生理事件测量设备产生的重复生理事件信号数据的伪像放射器包括与这种生理事件测量设备通信的生理事件信号平均器。 被构造的神经放射器基于相应的生理事件信号数据和心跳相关信号数据之间的基本上稳定的时间关系来产生和存储重复的平均生理事件信号数据。 重复的平均生理事件信号数据包括比重复的生理事件信号数据更少的噪声。 伪像放射器通过存储这种重复的平均生理事件信号数据来生成并持续更新平均数据模板，用于预选数量的测量生理事件。 神器放射器还包括与这种生理事件测量设备通信的生理事件噪声估计器和生理事件噪声监测器，并且能够指示监视器基于估计的监测噪声来调整测量周期。 平均器优选地包括尖锐的滚降低通滤波器，并且示例包括四阶贝塞尔滤波器，两个级联的相同二阶贝塞尔滤波器，椭圆滤波器，Tchetschebyscheff滤波器或有限脉冲响应滤波器。 心跳相关信号优选为ECG信号。 伪像抑制的方法包括基于相应的生理事件信号数据和心跳相关信号数据之间的基本上稳定的时间关系与重复的平均生理事件信号数据生成和存储重复的平均生理事件信号数据， 信号数据包括比重复的生理事件信号数据更少的噪声。

公开(公告)号：US4889133A

公开(公告)日：1989-12-26

申请号：US198468

申请日：1988-05-25

申请人： Craig H. Nelson ,  Thomas J. Dorsett ,  Charles L. Davis

发明人： Craig H. Nelson ,  Thomas J. Dorsett ,  Charles L. Davis

IPC分类号： A61B5/0225

CPC分类号： A61B5/02225 ,  A61B5/0225

摘要： A microprocessor-controlled, oscillometric method for determining a patient's systolic, diastolic, and mean arterial pressure, practiced in a system comprising an inflatable, occluding cuff, a pump and a valve coupled to the cuff, and monitoring apparatus coupled to the cuff adapted to measure cuff pressure and recurring blood-pressure pulsations occurring in the cuff that are caused by each heart contraction occurring in a measurement cycle. Cuff pressure is raised to a level above the patinet's systolic pressure, and progressively reduced in a stepwise fashion to an ending cuff pressure. A fixed number of pulsations are measured and processed at a first and second cuff-pressure step, and a generally lesser number of oscillations are measured and processed at a third and subsequent cuff-pressure steps. The method includes a first artifact rejection technique used to check for false data relative to the formation of each blood-pressure pulsation. Further, the method includes calculating, for each blood-pressure pulsation, the impulse of a force that is exerted upon the patinet's blood from, and during, each heart contraction that occurs in the measurement cycle. An impulse value is stored relative to each pulsation. A second artifact rejection technique is used, beginning at the second cuff-pressure step, to generate a prediction curve for predicting a next, expected-to-be-stored pulsation impulse value for a next, lower cuff-pressure step. The second artifact rejection technique is also used to repeatedly smooth the prediction curve based on the difference between a pulsation's calculated impulse value and its respective predicted impulse value. A final, smoothed curve is generated reflecting a final impulse value for each cuff-pressure step. From the final curve, the desired blood pressure parameters are derived and displayed in the form of arabic numerals by means of an LCD readout.

公开(公告)号：US4949710A

公开(公告)日：1990-08-21

申请号：US254204

申请日：1988-10-06

申请人： Thomas J. Dorsett ,  Charles L. Davis

发明人： Thomas J. Dorsett ,  Charles L. Davis

IPC分类号： A61B5/0225

CPC分类号： A61B5/02225 ,  A61B5/02116 ,  A61B5/0225 ,  A61B5/7207

摘要： For use in performing non-invasive blood-pressure measurement (NIBP), an artifact rejection method for predicting expected data values from acquired data, and for adjusting previously acquired data based on the relationship of actually measured data values to their corresponding predicted values. The method is practiced in a system comprising an inflatable, occluding cuff, a pump and a valve coupled to the cuff, and monitoring apparatus coupled to the cuff adapted to measure cuff pressure and recurring blood-pressure pulsations occurring in the cuff that are caused by each heart contraction occurring in a measurement cycle. Cuff pressure is raised to a level above the patient's systolic pressure, and progressively reduced in a stepwise fashion to an ending cuff pressure. A fixed number of pulsations are measured and processed at a first and second cuff-pressure step, and a generally lesser number of pulsations are measured and processed at a third and subsequent cuff-pressure steps. The method includes, at the second cuff-pressure step, generating a prediction curve for predicting a next, expected-to-be-stored pulsation data value for a next, lower cuff-pressure step. The method also includes repeatedly smoothing the prediction curve based on the difference between a pulsations's calculated data value and its respective predicted data value. A final, smoothed curve is generated reflecting a final pulsation data value for each cuff-pressure step. From the final curve, the desired blood pressure parameters are derived and displayed in the form of arabic numerals by means of an LCD read-out.

摘要翻译： 用于执行非侵入性血压测量（NIBP），用于从所获取的数据预测预期数据值的伪影拒绝方法，以及用于基于实际测量的数据值与其对应的预测值的关系来调整先前获取的数据。 该方法在包括可膨胀，闭塞的袖带，泵和耦合到袖带的阀的系统中实现，以及耦合到袖带的监测装置，其适于测量袖带中产生的袖带压力和重复出现的血压脉动，其由 每个心脏收缩发生在测量周期。 袖带压力提高到高于患者收缩压的水平，并逐步地逐渐减小到最终袖带压力。 在第一和第二袖带压步骤测量和处理固定数量的脉动，并且在第三和随后的袖带压力步骤测量和处理通常较少数量的脉动。 该方法包括：在第二袖带压步骤中，生成用于预测下一个较低袖带压步骤的下一个预期存储脉动数据值的预测曲线。 该方法还包括基于脉动计算的数据值与其各自的预测数据值之间的差异反复平滑预测曲线。 产生最终平滑的曲线，反映每个袖带压步骤的最终脉动数据值。 从最终曲线中，通过LCD读出导出所需血压参数并以阿拉伯数字显示。