公开(公告)号：US20160198969A1

公开(公告)日：2016-07-14

申请号：US14913700

申请日：2014-08-20

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Limei CHENG ,  Eric Thomas CARLSON ,  Srinivasan VAIRAVAN ,  Minnan XU

IPC: A61B5/0444 ,  A61B5/0456 ,  A61B5/0402 ,  A61B5/0472 ,  A61B5/00 ,  A61B5/024 ,  A61B5/04

CPC classification number: A61B5/02411 ,  A61B5/02405 ,  A61B5/0255 ,  A61B5/04017 ,  A61B5/04028 ,  A61B5/0444 ,  A61B5/0456 ,  A61B5/0468 ,  A61B5/0472 ,  A61B5/4362 ,  A61B5/7203 ,  A61B5/725 ,  A61B5/7253

Abstract: System (10) for extracting a fetal heart rate from at least one maternal signal using a computer processor (26). The system includes sensors (12-18)attached to a patient to receive abdominal ECG signals and a recorder and digitizer (20)to record and digitize each at least one maternal signal in a maternal signal buffer (22A-22D). The system further includes a peak detector (40) to identify candidate peaks in the maternal signal buffer. The signal stacker (42)of the system stacks the divides at least one maternal signal buffer into a plurality of snippets, each snippet including one candidate peak and a spatial filter (44)to identify and attenuate a maternal QRS signal in the plurality of snippets of the maternal signal buffer, the spatial filter including at least one of principal component analysis and orthogonal projection, to produce a raw fetal ECG signal which is stored in a raw fetal ECG buffer. The system further includes a fetal QRS identifier(46)for identifying peaks in the raw fetal ECG buffer by at least one of principal component analysis and a peak-detector followed by rule based fQRS extraction and a merger (48)to calculate and merge the fetal heart rate from the identified peaks.

Abstract translation: 用于使用计算机处理器（26）从至少一个母体信号提取胎儿心率的系统（10）。 该系统包括附接到患者以接收腹部ECG信号的传感器（12-18），以及记录器和数字化仪（20），用于在母体信号缓冲器（22A-22D）中记录和数字化每个至少一个母体信号。 该系统还包括峰值检测器（40），以识别母体信号缓冲器中的候选峰值。 系统的信号堆叠器（42）将至少一个母体信号缓冲器分成多个片段，每个片段包括一个候选峰和空间滤波器（44），以识别并衰减多个片段中的母体QRS信号 的母体信号缓冲器，空间滤波器包括主成分分析和正交投影中的至少一个，以产生存储在原始胎儿ECG缓冲器中的原始胎儿ECG信号。 该系统还包括用于通过主成分分析和峰值检测器中的至少一个识别原始胎儿ECG缓冲器中的峰值的胎儿QRS标识符（46），随后是基于规则的fQRS提取和合并（48）以计算并合并 胎心率从确定的峰值。

公开(公告)号：US20180322951A1

公开(公告)日：2018-11-08

申请号：US15772135

申请日：2016-10-19

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Srinivasan VAIRAVAN ,  Caitlyn Marie CHIOFOLO ,  Nicolas Wadih CHBAT

IPC: G16H50/20 ,  A61B5/08 ,  G16H50/30

CPC classification number: G16H50/20 ,  A61B5/08 ,  G06F19/00 ,  G16H10/60 ,  G16H50/30 ,  G16H50/50

Abstract: A process and system for determining a minimal, ‘pruned’ version of the known ARDS model is provided that quantifies the risk of ARDS in terms of physiologic response of the patient, eliminating the more subjective and/or therapeutic features currently used by the conventional ARDS models. This approach provides an accurate tracking of ARDS risk modeled only on the patient's physiological response and observable reactions, and the decision criteria are selected to provide a positive prediction as soon as possible before an onset of ARDS. In addition, the pruning process also allows the ARDS model to be customized for different medical facility sites using selective combinations of risk factors and rules that yield optimized performance. Additionally, predictions may be provided in cases with missing or outdated data by providing estimates of the missing data, and confidence bounds about the predictions based on the variance of the estimates.

公开(公告)号：US20200022597A1

公开(公告)日：2020-01-23

申请号：US16577425

申请日：2019-09-20

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Limei CHENG ,  Eric Thomas CARLSON ,  Srinivasan VAIRAVAN ,  Minnan XU

IPC: A61B5/024 ,  A61B5/0255 ,  A61B5/0444 ,  A61B5/00 ,  A61B5/0456 ,  A61B5/04 ,  A61B5/0472

Abstract: System (10) for extracting a fetal heart rate from at least one maternal signal using a computer processor (26). The system includes sensors (12-18) attached to a patient to receive abdominal ECG signals and a recorder and digitizer (20) to record and digitize each at least one maternal signal in a maternal signal buffer (22A-22D). The system further includes a peak detector (40) to identify candidate peaks in the maternal signal buffer. The signal stacker (42) of the system stacks the divides at least one maternal signal buffer into a plurality of snippets, each snippet including one candidate peak and a spatial filter (44) to identify and attenuate a maternal QRS signal in the plurality of snippets of the maternal signal buffer, the spatial filter including at least one of principal component analysis and orthogonal projection, to produce a raw fetal ECG signal which is stored in a raw fetal ECG buffer. The system further includes a fetal QRS identifier (46) for identifying peaks in the raw fetal ECG buffer by at least one of principal component analysis and a peak-detector followed by rule based fQRS extraction and a merger (48) to calculate and merge the fetal heart rate from the identified peaks.