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Digital electronic fetal heart rate and uterine contraction monitoring system

  • US 9,693,690 B2
  • Filed: 03/16/2016
  • Issued: 07/04/2017
  • Est. Priority Date: 03/19/2015
  • Status: Active Grant
First Claim
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1. A digital electronic fetal heart rate and uterine contraction monitoring system comprising:

  • a an electronic fetal monitor with an electronic fetal monitor processor, an electronic fetal monitor data storage, and an electronic fetal monitor display connected to the electronic fetal monitor processor, wherein the electronic fetal monitor processor is in further communication with a network;

    b a contraction monitoring sensor for sensing uterine contraction pressure over time from a mother, wherein the contraction monitoring sensor is adapted to be secured to the mother and in communication with the electronic fetal monitor;

    c a fetal heart rate sensor for sensing fetal heart rate over time from a fetus, wherein the fetal heart rate sensor is in communication with the electronic fetal monitor;

    d a maternal heart rate sensor for sensing maternal heart rate over time from the mother, wherein the maternal heart rate sensor is in communication with the electronic fetal monitor; and

    e a controller comprising a controller processor and a controller data storage in communication with the electronic fetal monitor, the controller data storage having stored therein computer instructions that, when executed by the controller processor, causes the controller processor to;

    i receive the sensed fetal heart rate from the fetal heart rate sensor, record and store the sensed fetal heart rate as fetal heart rate versus time data at a user selected sampling rate, and display the fetal heart rate versus time data as a fetal heart rate tracing;

    ii receive the sensed maternal heart rate from the maternal heart rate sensor, record and store the sensed maternal heart rate as maternal heart rate versus time data at a user selected sampling rate, and display the maternal heart rate versus time data as a maternal heart rate tracing;

    iii receive the sensed uterine contraction pressure from the contraction monitoring sensor, and record and store the sensed uterine contraction pressure as contraction pressure versus time data at a user selected sampling rate;

    iv utilize the contraction pressure versus time data to detect, calculate and store a contraction onset time for each contraction, a contraction offset time for each contraction, an average contraction onset pressure, and an average contraction offset pressure utilizing at least one of;

    a neural network model for contraction onset and contraction offset, a duration percentage max model for contraction onset and contraction offset, a contraction slope model for contraction onset and contraction offset, and a user adjustable minimum pressure model that evaluates only a portion of each contraction above a user adjustable minimum pressure for each contraction;

    v detect and store an active pressure of each detected contraction of the contraction pressure versus time data by subtracting an average uterine resting tone pressure from a contraction peak pressure;

    vi compute, store, and display each measure of each resting interval duration in seconds utilizing a stored contraction onset time for a respective contraction and a stored contraction offset time for an immediately previous contraction, both graphically and numerically;

    vii calculate and display a graph of an average rest interval duration for at least one fifteen-minute period of labor and a minimum normal rest interval for the same fifteen-minute period of labor;

    viii present a rest interval spectrum graph to depict a quantity of rest intervals occurring in a plurality of risk categories from low risk to high risk during the at least one fifteen-minute period of labor;

    ix transmit data and the graph depicting the average rest interval duration and the rest interval spectrum graph to a client device via the network; and

    x control a pump infusing a labor inducing drug to the mother to pause or decrease infusion of the labor inducing drug automatically when the controller processor detects resting intervals below a preset limit for the average rest interval duration, and wherein the digital electronic fetal heart rate and uterine contraction monitoring system protects a fetal brain automatically and without human intervention by pausing the pump or decreasing a pump flow for the pump that delivers the labor inducing drug to the mother that increases contractions.

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