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System and method for identifying high risk pregnancies

A high-risk pregnancy, Doppler signal technology, applied in the system field of identifying high-risk pregnancy, can solve the problems of not providing any direct estimation of blood volume, low sensitivity, etc.

Active Publication Date: 2014-07-30
KONINKLJIJKE PHILIPS NV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, these parameters do not provide any direct estimation of blood volume in vessels
[0006] Although the above parameters are considered the gold standard in terms of current clinical practice, they still have low sensitivity in detecting and predicting the above high-risk pregnancy conditions at an early stage

Method used

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  • System and method for identifying high risk pregnancies
  • System and method for identifying high risk pregnancies
  • System and method for identifying high risk pregnancies

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Embodiment Construction

[0041] Figure 1A and 1BThe maximum frequency envelope of the spectrogram from the acquired ultrasound Doppler signal is shown. Figure 1A Shown are peak values ​​(S) of blood flow velocity during peak systole corresponding to the cardiac cycle and valleys (D) of blood flow velocity corresponding to end diastole of the cardiac cycle. Figure 1B The temporal distance A between two consecutive valleys is shown. This distance A corresponds to the duration of a single cardiac cycle. It should be noted that alternatively the temporal distance A can be determined between two consecutive peaks. Parameters related to blood flow velocity can be determined from peak (S), trough (d) and temporal distance A.

[0042] The peak systolic flow velocity / end diastolic flow velocity ratio (S / D ratio) can be calculated from:

[0043] S / D ratio = S / D;

[0044] The Pulsatility Index (PI) can be calculated from:

[0045] PI=(S-D) / A;

[0046] Also, the Resistance Index (RI) can be calculated ac...

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Abstract

Method, system and software product for identifying high risk pregnancies comprising the step of generating a spectrogram from ultrasound Doppler signals reflected from the uterine artery and determining the maximum frequency envelope of said spectrogram, and of defining a systolic part and a diastolic part of the maximum frequency envelope and calculating an area ratio under said systolic and diastolic part (AR). This area ratio relates to the blood volume in the uterine artery.

Description

technical field [0001] The present invention relates to systems and methods for identifying high-risk pregnancies. Background technique [0002] Assessing pregnancy risk and monitoring high-risk pregnancies are routine tasks in pregnancy care to help mothers deliver healthy babies. Currently, the way to assess fetal health and classify pregnancy risk is to measure maternal-fetal blood flow in different vessels of the mother and fetus using ultrasound Doppler. Abnormal vascular flow reflects pregnancy risks and complications. For example, abnormal uterine artery blood flow may reflect high-risk pregnancy conditions, such as preeclampsia, maternal hypertension, and intrauterine growth retardation (IUGR), and may be an indicator of antenatal death. [0003] Ultrasound Doppler waveform analysis of fetal and maternal specific blood flow is currently routinely used to detect and monitor high-risk pregnancies. Obstetricians and sonographers use Doppler waveform analysis of blood...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/06A61B5/02
CPCA61B5/02007A61B5/4343A61B8/06A61B8/0866A61B8/488
Inventor P·瓦集内帕里R·达斯C·菲尔雄R·S·西索迪亚L·古普塔G·拉马钱德兰A·阿南德J·彼得鲁齐洛
Owner KONINKLJIJKE PHILIPS NV