WO2017124880A1 - 获取胎心率的方法及终端 - Google Patents

获取胎心率的方法及终端 Download PDF

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Publication number
WO2017124880A1
WO2017124880A1 PCT/CN2016/111677 CN2016111677W WO2017124880A1 WO 2017124880 A1 WO2017124880 A1 WO 2017124880A1 CN 2016111677 W CN2016111677 W CN 2016111677W WO 2017124880 A1 WO2017124880 A1 WO 2017124880A1
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Prior art keywords
fetal heart
echo
pulse
rate
pulse wave
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PCT/CN2016/111677
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English (en)
French (fr)
Inventor
廖为塔
谭娟鹃
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深圳市理邦精密仪器股份有限公司
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Priority to EP16852862.8A priority Critical patent/EP3243439B1/en
Priority to US15/518,163 priority patent/US10736522B2/en
Publication of WO2017124880A1 publication Critical patent/WO2017124880A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02411—Detecting, measuring or recording pulse rate or heart rate of foetuses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02444—Details of sensor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/0245—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7221—Determining signal validity, reliability or quality
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/02—Measuring pulse or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
    • A61B8/0866—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
    • A61B8/461—Displaying means of special interest
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/48—Diagnostic techniques
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/5215—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A61B5/0011—Foetal or obstetric data
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/43—Detecting, measuring or recording for evaluating the reproductive systems
    • A61B5/4306—Detecting, measuring or recording for evaluating the reproductive systems for evaluating the female reproductive systems, e.g. gynaecological evaluations
    • A61B5/4343—Pregnancy and labour monitoring, e.g. for labour onset detection

Definitions

  • the embodiments of the present invention belong to the field of medical devices, and in particular, to a method and a terminal for acquiring a fetal heart rate.
  • the fetal heart probe detects the pulse echo reflected from the abdominal artery of the pregnant woman or the umbilical cord artery, according to The pulse echo is calculated from the pulse rate of the pregnant woman. That is to say, the data output in this case may be either the fetal heart rate or the pregnant woman's pulse rate, and because the pregnant woman has severe exercise due to contraction pain during the second stage of labor.
  • the data output in this case may be either the fetal heart rate or the pregnant woman's pulse rate, and because the pregnant woman has severe exercise due to contraction pain during the second stage of labor.
  • This is often a higher rate of pregnant women, especially when the pulse rate of pregnant women is around l lObpm, it is easy to regard the pulse rate of the pregnant woman as the fetal heart rate, which leads to the invalid fetal heart rate.
  • the prior art generally uses a photoelectric sensor built in the probe to obtain the fetal heart rate, and also uses the light intensity received by the photoelectric sensor to calculate the pulse rate of the pregnant woman, and then the tire. The heart rate is compared with the pulse rate of the pregnant woman to determine whether the acquired fetal heart rate is valid data.
  • Photoelectric sensors are susceptible to ambient light and pregnant women's movements, resulting in lower accuracy of the acquired pulse rate of pregnant women. It is especially important to detect accurate fetal heart rate in pregnant women, but existing Techniques often fail to detect the pulse rate of pregnant women in pregnant women.
  • a method for obtaining a fetal heart rate comprising:
  • the difference between the fetal heart rate and the pulse rate of the pregnant woman is not less than a preset threshold ⁇ , the fetal heart rate is output, and the difference between the fetal heart rate and the pregnant female pulse rate is less than a preset Threshold ⁇ , issuing a prompt message and outputting the fetal heart rate.
  • the method for acquiring a fetal heart rate further includes: preset a continuous pulse of the ultrasonic pulse wave.
  • the fetal heart rate steps include:
  • the preset second inter-turn interval is greater than the preset first inter-turn interval.
  • the method further includes:
  • the preset third inter-turn interval is smaller than the preset second inter-turn interval.
  • the number of ultrasonic pulse waves is two beams, which are a first ultrasonic pulse wave and a second ultrasonic pulse wave, respectively;
  • the pulse echo and the fetal heart echo corresponding to each period of the ultrasonic pulse wave are received, and the pulse echo and the fetal heart echo are respectively processed to obtain a corresponding pregnant pulse rate.
  • the fetal heart rate steps include:
  • the frequency of the first ultrasonic pulse wave is greater than the frequency of the second ultrasonic pulse wave.
  • the method further includes:
  • the method further includes:
  • the adjusting parameters of the ultrasonic pulse wave corresponding to the fetal heart echo include: increasing the power of the ultrasonic pulse wave corresponding to the fetal heart echo, and/or increasing the ultrasonic pulse corresponding to the fetal heart echo The wave is continuously adjusted; the adjusting the parameter for monitoring the fetal heart echo comprises: increasing the preset second inter-turn interval and/or increasing the preset fourth inter-turn interval and corresponding The difference between the preset second inter-turn intervals.
  • Another aspect of the present invention provides a terminal, where the terminal includes:
  • an input device an output device, a processor
  • the output device is configured to send an ultrasonic pulse wave to a belly of the pregnant woman according to a preset period
  • the processor is configured to receive, by the input device, a pulse echo and a fetal heart echo corresponding to each period of the ultrasonic pulse wave, and respectively process the pulse echo and the fetal heart echo Corresponding pregnant women's pulse rate and fetal heart rate;
  • the output device is further configured to: when a difference between the fetal heart rate and the pregnant woman pulse rate is not less than a preset threshold
  • the processor is further configured to: [0039] receiving a corresponding pulse echo at a preset first inter-turn interval after each period of the ultrasonic pulse wave is sent after engraving
  • the fetal heart echo is processed to obtain a corresponding fetal heart rate; wherein the preset second inter-turn interval is greater than the preset first inter-turn interval;
  • the processor presets a continuous burst of ultrasound pulse waves.
  • the number of the ultrasonic pulse waves is two beams, which are a first ultrasonic pulse wave and a second ultrasonic pulse wave, respectively;
  • the processor is configured to receive, by the input device, a pulse echo corresponding to the first ultrasonic pulse wave of each period, process the pulse echo to obtain a corresponding pulse rate of the pregnant woman, and And receiving, by the input device, a fetal heart echo corresponding to the second ultrasonic pulse wave of each period, and processing the fetal heart echo to obtain a corresponding fetal heart rate.
  • the terminal further includes:
  • a display configured to determine, when the difference between the fetal heart rate and the pulse rate of the pregnant woman is less than the preset threshold, a difference between the fetal heart rate and the pregnant pulse rate is less than a preset threshold , to indicate that the fetal heart rate is invalid data.
  • the method for acquiring the fetal heart rate obtains the corresponding pregnant woman pulse rate and the reference fetal heart rate by pulse echo and fetal heart echo, respectively, and then refers to the fetal heart rate and the pregnant female pulse rate.
  • the difference is not less than the preset threshold ⁇ , and the reference fetal heart rate is taken as the actual fetal heart rate, thereby obtaining the fetal heart rate of the sputum.
  • the method of obtaining the reference fetal heart rate and the pulse rate of the pregnant woman are the same, the error caused by different acquisition methods can be avoided; on the other hand, the pulse rate of the pregnant woman calculated by the pulse echo is not subject to ambient light and Interference with external factors such as coupling agent on the probe has high accuracy. It can be seen that the method improves the accuracy of the acquired fetal heart rate, thereby providing high quality reference data for clinical fetal monitoring based on the fetal heart rate for further processing.
  • DRAWINGS 1 is a flow chart of a method of obtaining a fetal heart rate in one embodiment
  • FIG. 2 is an embodiment of the ultrasound pulse wave according to each cycle to receive the corresponding pulse echo and fetal heart echo, the pulse echo and fetal heart echo are processed separately to obtain the corresponding pregnant pulse rate and fetal Flow chart of the heart rate step;
  • 3 is another embodiment of the ultrasound pulse wave according to each cycle to receive the corresponding pulse echo and fetal heart echo, the pulse echo and fetal heart echo are processed separately to obtain the corresponding pregnant pulse rate and Flow chart of the fetal heart rate step;
  • FIG. 4 is a schematic diagram of an operational waveform in one embodiment
  • FIG. 5 is another embodiment of the present invention, according to each period of the ultrasonic pulse wave receiving a corresponding pulse echo and fetal heart echo, respectively processing the pulse echo and the fetal heart echo to obtain a corresponding pregnant pulse rate and Flow chart of the fetal heart rate step;
  • FIG. 6 is a schematic diagram of an operational waveform in another embodiment
  • FIG. 7 is a schematic structural diagram of a terminal in an embodiment
  • FIG. 8 is a schematic structural diagram of a processor in an embodiment.
  • the ultrasonic pulse wave is sent to the abdominal direction of the pregnant woman according to a preset period, and the pulse echo and the fetal heart echo corresponding to the ultrasonic pulse wave of each period are received, and the pulse echo and the echo are The fetal heart echo is processed separately to obtain a corresponding pregnant woman pulse rate and fetal heart rate, and the fetal heart rate is outputted when the difference between the fetal heart rate and the pregnant female pulse rate is not less than a preset threshold.
  • FIG. 1 is a flow chart of a method for obtaining a fetal heart rate in an embodiment, which is described in detail as follows:
  • Step 110 Send an ultrasonic pulse wave to the belly of the pregnant woman according to a preset period.
  • the beating of the abdominal artery of pregnant women is relatively obvious and powerful, and the rhythm is consistent with the pulse of the radial artery.
  • the corresponding pulse rate of the pregnant woman can be obtained.
  • the fetal heart to be monitored is located inside the abdomen of the pregnant woman, the ultrasonic pulse wave sent to the abdomen of the pregnant woman can reach not only the abdominal artery of the pregnant woman but also the fetal heart of the pregnant woman's abdomen. It can also be seen that the same pregnant woman has different The pulse monitoring depth and fetal heart monitoring depth. Because the skin and tissue thickness of each pregnant woman are not the same, the depth of the fetal heart and the abdominal heart of different pregnant women are not the same, that is, the depth of pulse monitoring and the depth of fetal heart monitoring of different pregnant women are also different.
  • the transmitted ultrasonic pulse wave will continue for a predetermined period of time, so that even if different pregnant women have different pulse monitoring depths or different fetal heart monitoring depths, it can ensure more accurate reception. Echo.
  • Step 130 Receive a pulse echo and a fetal heart echo corresponding to each period of the ultrasonic pulse wave, and separately process the pulse echo and the fetal heart echo to obtain a corresponding pregnant pulse rate and fetal heart rate.
  • the ultrasonic pulse wave When the ultrasonic pulse wave reaches the abdominal artery of the pregnant woman, the pulse echo corresponding to the ultrasonic pulse wave is returned. Similarly, when the ultrasonic pulse wave reaches the fetal heart of the pregnant woman, the fetal heart echo corresponding to the ultrasonic pulse wave is returned.
  • Step 150 The fetal heart rate is outputted when the difference between the fetal heart rate and the pregnant female pulse rate is not less than a preset threshold.
  • the preset threshold is 5 bpm
  • the difference between the fetal heart rate and the maternal pulse rate is not less than 5 bpm
  • the fetal heart rate is output, thereby obtaining the fetal heart rate.
  • the prompt information is sent and the fetal heart rate is output.
  • the method for obtaining fetal heart rate obtains the pulse rate and fetal heart rate of the pregnant woman by receiving and processing Doppler echoes of different depths, that is, pulse echo and fetal heart echo, respectively. Then, based on the comparison between the fetal heart rate and the pregnant woman's pulse rate, the fetal heart rate is output. Since the fetal heart rate is determined by the ultrasonic pulse wave, it is not affected by the ambient light and the couplant on the fetal heart probe, and the interference caused by the violent contraction of the pregnant woman is also greatly improved, thereby improving the acquired tire. The accuracy of the heart rate.
  • the purpose of the present invention is to improve the accuracy of the acquired fetal heart rate by implementing the above process, and how to use the acquired fetal heart rate for further processing to obtain any monitoring results in clinical fetal monitoring.
  • the invention is not to be considered or limited.
  • the step 130 includes:
  • Step 1321 Receive a corresponding pulse echo at a preset first inter-turn interval after each period of the ultrasonic pulse wave transmission engraving, and process the pulse echo to obtain a corresponding pregnant pulse rate; specifically, A cycle If the transmission of the ultrasonic pulse wave reaches the preset first inter-turn interval, the corresponding pulse echo is received.
  • the corresponding pulse echo is not received.
  • the preset first inter-turn interval is 0.1 second
  • the corresponding pulse echo is received after transmitting the ultrasonic pulse wave for 0.1 second.
  • Step 1323 Receive a corresponding fetal heart echo at a preset second inter-turn interval after each period of the ultrasonic pulse wave transmission engraving, and process the fetal heart echo to obtain a corresponding fetal heart rate.
  • the second inter-turn interval is preset to be greater than the preset first inter-turn interval.
  • the first inter-turn interval is preset to be an ultrasound pulse wave to and from the intercondylar artery between the pregnant woman's abdominal artery, and can be divided by the ultrasonic pulse wave to reach the abdominal artery of the pregnant woman by 2 times the ultrasonic pulse wave in the human tissue.
  • the average propagation speed (approximately 1540 m/s) was obtained.
  • the preset second inter-turn interval is an ultrasound pulse wave traveling back and forth between the fetal heart in the abdomen of the pregnant woman, and can be divided according to the ultrasonic pulse wave reaching the fetal heart distance by 2 times divided by the ultrasonic pulse wave in the human tissue. Speed is obtained.
  • the step 130 further includes:
  • Step 1331 stopping receiving and processing the corresponding pulse echo in the preset third inter-day interval after the ultrasound pulse wave is sent in each period; specifically, in one cycle, if the ultrasonic pulse wave is transmitted After the preset third inter-day interval is reached, the corresponding pulse echo is stopped and processed.
  • Step 1333 Stop receiving and processing the corresponding fetal heart echo in the preset fourth inter-turn interval after the ultrasound pulse wave of each period is sent;
  • the preset third inter-turn interval is smaller than the corresponding preset second inter-twist interval, and thus, there is no pulse return.
  • the difference between the preset third inter-turn interval and the corresponding preset first inter-turn interval is the pulse demodulation time, and the preset fourth inter-turn interval and the corresponding preset second ⁇ Interval between fetal heart rate demodulation
  • FIG. 4 transmits only one ultrasonic pulse wave in each preset period T, and the ultrasonic pulse wave continues to be t0. It should be noted that FIG. 4 only lists a transmission sequence. In the actual situation, the transmission order of the pulse echo and the fetal heart echo can also be exchanged, and details are not described herein again.
  • the ultrasonic pulse wave of each period is sent after the engraving of the preset first ⁇
  • the interval interval t1 and the preset third inter-turn interval t3 respectively receive and stop receiving the corresponding pulse echoes, and the ultrasonic pulse wave of each cycle transmits the preset second inter-turn interval t2 and the preset fourth frame after the engraving.
  • the interval t4 receives and stops receiving the corresponding fetal heart echo, respectively.
  • This method is relatively simple for the transmission control of the ultrasonic pulse wave, but it is difficult to distinguish the sensitivity from the sensitivity difference between the pulse monitoring depth and the fetal heart monitoring depth difference.
  • the number of ultrasonic pulse waves is two beams, which are a first ultrasonic pulse wave and a second ultrasonic pulse wave, respectively, specifically, the second ultrasonic pulse wave and the
  • the preset fifth inter-turn interval of the first ultrasonic pulse wave phase difference is less than a preset period and greater than a preset third inter-turn interval.
  • the step 130 includes:
  • Step 1351 receiving a pulse echo corresponding to the first ultrasonic pulse wave of each period, and processing the pulse echo to obtain a corresponding pulse rate of the pregnant woman;
  • Step 1353 Receive a fetal heart echo corresponding to the second ultrasonic pulse wave of each period, and process the fetal heart echo to obtain a corresponding fetal heart rate.
  • the embodiment shown in FIG. 6 is to transmit two ultrasonic pulse waves in each preset period T, the first ultrasonic pulse wave is only used to monitor the pulse echo, and the corresponding pulse wave is continuously t0;
  • the second ultrasonic pulse wave is only used to monitor the fetal heart echo, and the corresponding pulse wave continues to be 'to'; and the interval between the second ultrasonic pulse wave and the first ultrasonic pulse wave is preset to be the fifth time The interval is t5.
  • the preset first first interval t1 and the preset third inter-interval t3 after the first ultrasonic pulse wave of each period are received and stopped are respectively received and stopped.
  • a pulse echo corresponding to the first ultrasonic pulse wave, receiving and stopping receiving the first ultrasonic pulse wave in each period after the second ultrasonic pulse wave is sent to the preset second inter-turn interval t2 and the preset fourth inter-turn interval t4
  • the second echo pulse corresponds to the fetal heart echo.
  • This method can conveniently adjust the emission dose of the ultrasonic pulse wave (including the power of the ultrasonic pulse wave and the continuous pulse of the pulse wave) according to the difference between the abdominal artery depth and the fetal heart depth of the pregnant woman, and can even change the ultrasonic pulse wave.
  • the frequency of the pulse echo and fetal heart echo are monitored more specifically and effectively.
  • the frequency of the first ultrasonic pulse wave may be equal to or greater than the frequency of the second ultrasonic pulse wave. In another embodiment, the frequency of the first ultrasonic pulse wave is greater than the frequency of the second ultrasonic pulse wave.
  • the first ultrasound pulse wave with a higher frequency can be used to monitor the pulse rate of the pregnant woman, and a higher resolution can be obtained.
  • Frequency A lower rate of second ultrasound pulse wave monitoring fetal heart rate results in less signal energy attenuation.
  • the method further includes the steps of:
  • the peer can continuously express the fetal heart rate as needed, without considering the relationship between the fetal heart rate and the difference in the pregnant woman's pulse rate.
  • the method further includes the steps of:
  • the difference between the fetal heart rate and the maternal pulse rate is less than a preset threshold, adjusting the parameters of the ultrasonic pulse wave corresponding to the fetal heart echo and/or adjusting the parameters for monitoring the fetal heart echo.
  • step 110 After adjusting the parameters of the ultrasonic pulse wave corresponding to the fetal heart echo and/or adjusting the parameters for monitoring the fetal heart echo, the process proceeds to step 110 to step 150 to recalculate the fetal heart rate and the pregnant female pulse rate. And determining whether the difference between the fetal heart rate and the pregnant woman's pulse rate is not less than a preset threshold. If yes, stopping the adjustment of the parameter and outputting the fetal heart rate; if not, continuing to perform the parameter Adjust until the difference between the fetal heart rate and the maternal pulse rate is not less than the preset threshold.
  • adjusting the parameter of the ultrasonic pulse wave corresponding to the fetal heart echo may increase the power of the ultrasonic pulse wave corresponding to the fetal heart echo, and/or increase the duration of the ultrasonic pulse wave corresponding to the fetal heart echo In the daytime.
  • Adjusting the parameter for monitoring fetal heart echo may increase the second intercondylar interval to increase the depth of fetal heart monitoring; due to fetal movement, the distance from the ultrasonic pulse wave to the fetal heart is large and small, and the ultrasound may be selected. The distance from the pulse wave to the fetal heart is the preset distance, and then the fetal heart echo is received; and/or,
  • the method for obtaining the fetal heart rate is less than a preset threshold value when the difference between the fetal heart rate and the pregnant female pulse rate is ⁇ , which not only prompts the user but also automatically adjusts until the difference between the fetal heart rate and the pregnant female pulse rate is not
  • the threshold is less than the preset threshold, the fetal heart rate is re-outputted, which improves the intelligent processing capability.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the execution order of each process should be determined by its function and internal logic, and should not be taken to the embodiment of the present invention.
  • the implementation process constitutes any limitation.
  • a terminal is also proposed. As shown in FIG. 7, the output device 710, the processor 720, and the input device 730 are included. among them:
  • the output device 710 is configured to send an ultrasonic pulse wave to the belly of the pregnant woman according to a preset period
  • the processor 720 is configured to receive, by the input device 730, a pulse echo and a fetal heart echo corresponding to the ultrasound pulse wave reception of each period, and respectively process the pulse echo and the fetal heart echo to obtain a corresponding pregnant woman. Pulse rate and fetal heart rate;
  • the output device 710 is further configured to output the fetal heart rate when the difference between the fetal heart rate and the pregnant female pulse rate is not less than a preset threshold.
  • the prompt information is sent and the fetal heart rate is output.
  • processor 720 is further configured to:
  • the fetal heart echo is processed to obtain a corresponding fetal heart rate; wherein the preset second inter-turn interval is greater than the preset first inter-turn interval;
  • the processor presets a continuous burst of ultrasound pulse waves.
  • the first inter-turn interval and the second inter-turn interval are counted by the counter, and the statistical result is fed back to the processor 720.
  • the processor 720 is further configured to: stop receiving the corresponding pulse echo and the input device 730 by the input device 730 after the preset third third interval after the ultrasound pulse wave transmission of each period Stop processing the corresponding pulse echo; and, for the preset fourth fourth interval after the ultrasonic pulse wave transmission of each period stops receiving and stopping the corresponding fetal heart echo through the input device 730; wherein
  • the preset third inter-turn interval is smaller than the preset second inter-turn interval.
  • the processor 720 includes a pulse ultrasound transducing unit 7201, a pulse demodulating unit 7202, a pulse sampling unit 7203, a pulse buffer unit 7204, and a pulse that are sequentially electrically connected.
  • the arithmetic unit 7205 includes a pulse ultrasound transducing unit 7201, a pulse demodulating unit 7202, a pulse sampling unit 7203, a pulse buffer unit 7204, and a pulse that are sequentially electrically connected.
  • the arithmetic unit 7205 among them,
  • a pulse ultrasound transducing unit 7201 configured to preset a first pulse after each cycle of the ultrasonic pulse wave is sent The inter-turn interval receives a corresponding pulse echo through the input device 730 and converts the pulse echo into a pulse electrical signal; specifically, the ultrasonic transducing unit may be an ultrasonic transducer.
  • the pulse demodulation unit 7202 is configured to perform demodulation processing on the pulse electrical signal to obtain a pulse audio signal.
  • the pulse sampling unit 7203 is configured to send a preset pulse after the ultrasonic pulse wave is sent in each cycle. The pulse sampling signal is obtained by sampling the pulse audio signal at intervals;
  • a pulse buffer unit 7204 configured to store a pulse sampling signal
  • the pulse operation unit 7205 is configured to calculate a corresponding pregnant woman pulse rate according to the stored pulse sampling signal.
  • the processor 720 further includes a fetal heart ultrasound transducer unit and a fetal heart rate demodulation unit that are sequentially electrically connected.
  • fetal heart sampling unit fetal heart rate buffer unit and fetal heart rate computing unit.
  • the pulse demodulation unit 7202 further includes a pulse pre-amplification unit, and the pulse demodulation unit 7202 further includes a pulse filtering unit and a pulse amplifying unit.
  • the fetal heart demodulation unit further includes a fetal heart pre-amplification unit, which further includes a fetal heart filter unit and a fetal heart amplification unit.
  • the number of ultrasonic pulse waves is two, which are a first ultrasonic pulse wave and a second ultrasonic pulse wave, respectively.
  • the processor 720 is configured to receive, by the input device 730, a pulse echo corresponding to the first ultrasonic pulse wave of each period, process the pulse echo to obtain a corresponding pregnant pulse rate, and, for The fetal heart echo corresponding to the second ultrasonic pulse wave of each cycle is received by the input device 730, and the fetal heart echo is processed to obtain a corresponding fetal heart rate.
  • the frequency of the first ultrasonic pulse wave is greater than the frequency of the second ultrasonic pulse wave.
  • the terminal further includes:
  • a prompting device configured to: when a difference between a fetal heart rate and a pregnant female pulse rate is less than a preset threshold, displaying a determination result that the difference between the fetal heart rate and the pregnant female pulse rate is less than a preset threshold, to prompt the Fetal heart rate is invalid data.
  • the prompter can use the conventional sound and light reminder device, such as: display device, printer, buzzer, etc. , I won't go into details here.
  • the processor 720 is further configured to adjust a parameter and/or an adjustment of the ultrasonic pulse wave corresponding to the fetal heart echo after the difference between the fetal heart rate and the pregnant pulse rate is less than a preset threshold. Parameters used to monitor fetal heart echo.
  • adjusting the parameters of the ultrasonic pulse wave corresponding to the fetal heart echo includes: increasing the power of the ultrasonic pulse wave corresponding to the fetal heart echo, and/or increasing the duration of the ultrasonic pulse wave corresponding to the fetal heart echo
  • Adjusting the parameters for monitoring fetal heart echo includes increasing the preset second inter-turn interval and/or increasing the difference between the preset fourth inter-turn interval and the corresponding preset second inter-turn interval.
  • the ultrasonic transducer and the circuit corresponding to the matched inductance, capacitance, resistance and the like are arranged in the fetal heart probe, and the other units/modules in the terminal correspond to The circuit is disposed in a host electrically connected to the fetal heart probe;
  • the pulse demodulation unit 7 202 in the processor 720 In addition to the ultrasonic transducer and circuitry corresponding to its matched components of inductance, capacitance, resistance, etc., disposed in the fetal heart probe, other units of the output device 710 in the terminal, the pulse demodulation unit 7 202 in the processor 720 The circuit corresponding to the pulse filtering unit, the pulse amplifying unit, the fetal heart rate demodulating unit, the fetal heart filtering unit, and the fetal heart amplifying unit is also disposed in the fetal heart probe, and the circuits corresponding to the other units of the processor 720 are disposed in the host.
  • the pulse audio signal and the fetal heart echo signal are sent to the host to calculate the maternal pulse rate and the fetal heart rate; or the corresponding circuits of each module in the terminal are arranged in the fetal heart probe, that is, in the fetal heart probe. Calculation of pulse rate and fetal heart rate in pregnant women.
  • the fetal heart probe can be connected to the host through wireless communication, and the data of all the fetal heart probes in use can be summarized on the host, which facilitates unified management of the host.
  • the circuit corresponding to the pulse pre-amplification unit and the fetal heart pre-amplification unit may use the same set, but the pulse demodulation unit 7202, the pulse filter unit, the pulse amplification unit and the fetal heart rate demodulation unit, the fetal heart filter unit, and the fetal heart amplification
  • the circuit corresponding to the unit should use two sets of bifurcation. If the same set is used, the same set of circuits cannot be demodulated, filtered, amplified, etc. due to the alternating occurrence of pulse echoes and fetal heart echoes between different cycles.
  • the pulse sampling unit 7203 and the fetal heart sampling unit also use two sets of circuits for sampling the pulse audio signal and the fetal heart audio signal, thereby realizing pulse echo and fetal heart echo separation processing. purpose.
  • the main control unit in the processor 720 controls the pulse demodulation unit respectively after the preset first first inter-turn interval and the preset second inter-turn interval after each period of the ultrasonic pulse wave is sent.
  • the off of the pulse demodulation unit 7202, the fetal heart rate demodulation unit and the pulse sampling unit 7203, and the fetal heart sampling unit are separately controlled.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the unit described as a separate component may or may not be physically distributed, and the component displayed as a unit may or may not be a physical unit, that is, may be located in one place, or may be located in one place. Distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM, a random access memory), a magnetic disk, or an optical disk, and the like, which can store program code. .

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Abstract

一种获取胎心率的方法，包括：按预设周期向孕妇腹部方向发送超声脉冲波（110）；根据每个周期的超声脉冲波接收对应的脉搏回波和胎心回波，对脉搏回波和胎心回波分别进行处理得到对应的孕妇脉率和胎心率（130）；根据胎心率与孕妇脉率的差值不小于预设阈值时的判断结果输出该胎心率（150）。此外，还提供了一种获取胎心率的系统及设备。所述获取胎心率的方法及终端提高了获取到的胎心率的准确度。

Description

说明书 发明名称：获取胎心率的方法及终端 技术领域
[0001] 本发明实施例属于医疗器械领域， 尤其涉及一种获取胎心率的方法及终端。
背景技术
[0002] 在孕妇产程中， 需要根据获取到的胎心率作进一步处理以实现临床胎儿监护。
由于产程中孕妇宫缩使得胎心回波较弱， 因而， 获取到的胎心率的准确度较低 。 尤其在第二产程中， 孕妇宫缩厉害， 往往在宫缩中、 宫缩后的一段吋间内， 胎心探头监测到的是从孕妇腹部动脉或者是脐带动脉反射的脉搏回波， 据该脉 搏回波计算得到的是孕妇脉率， 也就是说， 在这种情况下输出的数据既可能是 胎心率也可能是孕妇脉率， 又由于第二产程中孕妇因宫缩疼痛剧烈运动， 此吋 孕妇脉率往往较高， 特别是当孕妇脉率在 l lObpm左右吋， 容易将该孕妇脉率当 成胎心率， 导致获取到的胎心率实为无效数据。
[0003] 为解决上述问题， 现有技术一般是通过在探头中内置光电传感器， 在获取胎心 率的同吋， 还利用光电传感器接收到的光强度来计算得到孕妇脉率， 然后再将 胎心率与孕妇脉率进行比较来判断获取到的胎心率是否为有效数据。
[0004] 但是， 现有技术存在以下缺陷：
[0005] 光电传感器易受环境光以及孕妇运动等因素的影响， 导致获取到的孕妇脉率的 准确度较低， 在孕妇宫缩吋， 是否检测到准确的胎心率尤其重要， 但现有技术 经常无法在孕妇宫缩吋检测到孕妇脉率；
[0006] 由于现有技术获取到的孕妇脉率的准确度较低， 在特殊吋候如宫缩吋甚至检测 不到孕妇脉率， 因此， 在将胎心率与其进行比较， 并根据比较结果判断获取到 的胎心率是否为有效数据吋， 导致获取到的胎心率的准确度也不高， 可见， 现 有技术仍然没有给出胎心率是否准确的有效判断依据的问题。
技术问题
[0007] 基于此， 有必要提供一种获取胎心率的方法， 以解决现有技术没有给出胎心率 是否准确的有效判断依据的问题。 问题的解决方案
技术解决方案
[0008] 此外， 还有必要提供一种获取胎心率的系统， 以解决现有技术没有给出胎心率 是否准确的有效判断依据的问题。
[0009] 为解决上述技术问题， 将采用如下技术方案：
[0010] 一种获取胎心率的方法， 包括：
[0011] 按预设周期向孕妇腹部方向发送超声脉冲波；
[0012] 接收与每个周期的超声脉冲波对应的脉搏回波和胎心回波， 对所述脉搏回波和 所述胎心回波分别进行处理得到对应的孕妇脉率和胎心率；
[0013] 在所述胎心率与所述孕妇脉率的差值不小于预设阈值吋， 输出所述胎心率， 在 所述胎心率与所述孕妇脉率的差值小于预设阈值吋， 发出提示信息和输出所述 胎心率。
[0014] 进一步的， 所述获取胎心率的方法， 还包括： 预设超声脉冲波的持续吋间。
[0015] 进一步地， 所述接收与每个周期的超声脉冲波对应的脉搏回波和胎心回波， 对 所述脉搏回波和所述胎心回波分别进行处理得到对应的孕妇脉率和胎心率的步 骤包括：
[0016] 在每个周期的超声脉冲波发送吋刻后的预设第一吋间间隔接收对应的脉搏回波
， 对所述脉搏回波进行处理得到对应的孕妇脉率；
[0017] 在每个周期的超声脉冲波发送吋刻后的预设第二吋间间隔接收对应的胎心回波
， 对所述胎心回波进行处理得到对应的胎心率； 其中，
[0018] 所述预设第二吋间间隔大于所述预设第一吋间间隔。
[0019] 进一步地， 还包括：
[0020] 在每个周期的超声脉冲波发送吋刻后的预设第三吋间间隔停止接收和处理对应 的脉搏回波；
[0021] 在每个周期的超声脉冲波发送吋刻后的预设第四吋间间隔停止接收和处理对应 的胎心回波； 其中，
[0022] 所述预设第三吋间间隔小于所述预设第二吋间间隔。
[0023] 进一步地， 在所述按预设周期向孕妇腹部方向发送超声脉冲波的步骤中， 所述 超声脉冲波的数量为两束， 分别为第一超声脉冲波和第二超声脉冲波；
[0024] 相应地， 所述接收与每个周期的超声脉冲波对应的脉搏回波和胎心回波， 对所 述脉搏回波和所述胎心回波分别进行处理得到对应的孕妇脉率和胎心率的步骤 包括：
[0025] 接收与每个周期的第一超声脉冲波对应的脉搏回波， 对所述脉搏回波进行处理 得到对应的孕妇脉率；
[0026] 接收与每个周期的第二超声脉冲波对应的胎心回波， 对所述胎心回波进行处理 得到对应的胎心率。
[0027] 进一步地， 所述第一超声脉冲波的频率大于所述第二超声脉冲波的频率。
[0028] 进一步地， 还包括：
[0029] 在所述胎心率与所述孕妇脉率的差值小于所述预设阈值吋， 显示所述胎心率与 孕妇脉率的差值小于预设阈值的判断结果， 以提示所述胎心率为无效数据。
[0030] 进一步地， 还包括：
[0031] 在所述胎心率与所述孕妇脉率的差值小于所述预设阈值吋， 调整胎心回波对应 的超声脉冲波的参数和 /或调整用于监测所述胎心回波的参数。
[0032] 进一步地， 所述调整胎心回波对应的超声脉冲波的参数包括： 增大胎心回波对 应的超声脉冲波的功率， 和 /或， 增大胎心回波对应的超声脉冲波持续吋间； 所 述调整用于监测所述胎心回波的参数包括： 增大所述预设第二吋间间隔和 /或增 大所述预设第四吋间间隔与对应的所述预设第二吋间间隔的差值。
[0033] 本发明另一个方面提供了一种终端， 所述终端包括：
[0034] 输入设备、 输出设备、 处理器；
[0035] 所述输出设备， 用于按预设周期向孕妇腹部方向发送超声脉冲波；
[0036] 所述处理器， 用于通过输入设备接收与每个周期的超声脉冲波对应的脉搏回波 和胎心回波， 对所述脉搏回波和所述胎心回波分别进行处理得到对应的孕妇脉 率和胎心率；
[0037] 所述输出设备， 还用于在所述胎心率与所述孕妇脉率的差值不小于预设阈值吋
， 输出所述胎心率。
[0038] 进一步地， 所述处理器还用于： [0039] 在每个周期的超声脉冲波发送吋刻后的预设第一吋间间隔接收对应的脉搏回波
， 对所述脉搏回波进行处理得到对应的孕妇脉率， 以及， 用于在每个周期的超 声脉冲波发送吋刻后的预设第二吋间间隔接收对应的胎心回波， 对所述胎心回 波进行处理得到对应的胎心率； 其中， 所述预设第二吋间间隔大于所述预设第 一吋间间隔；
[0040] 所述处理器预设超声脉冲波的持续吋间。
[0041] 进一步地， 在所述输出设备中， 所述超声脉冲波的数量为两束， 分别为第一超 声脉冲波和第二超声脉冲波；
[0042] 相应地， 所述处理器， 用于通过输入设备接收与每个周期的第一超声脉冲波对 应的脉搏回波， 对所述脉搏回波进行处理得到对应的孕妇脉率， 以及， 用于通 过输入设备接收与每个周期的第二超声脉冲波对应的胎心回波， 对所述胎心回 波进行处理得到对应的胎心率。
[0043] 进一步地， 所述终端还包括：
[0044] 显示器， 用于在所述胎心率与所述孕妇脉率的差值小于所述预设阈值吋， 显示 所述胎心率与孕妇脉率的差值小于预设阈值的判断结果， 以提示所述胎心率为 无效数据。
发明的有益效果
有益效果
[0045] 由上述技术方案可知， 该获取胎心率的方法通过脉搏回波和胎心回波来分别获 取对应的孕妇脉率和参考胎心率， 然后在参考胎心率与孕妇脉率的差值不小于 预设阈值吋， 将该参考胎心率作为实际胎心率， 从而获取到此吋的胎心率。 一 方面的， 由于获取参考胎心率和孕妇脉率的方法相同， 可避免不同获取方法自 身带来的误差； 另一方面的， 通过脉搏回波计算得到的孕妇脉率不会受到环境 光以及探头上耦合剂等外界因素的干扰， 具有较高的准确度。 可见， 本方法提 高了获取到的胎心率的准确度， 从而为基于该胎心率作进一步处理的临床胎儿 监护提供了高质量的参考数据。
对附图的简要说明
附图说明 [0046] 图 1是一个实施例中获取胎心率的方法的流程图；
[0047] 图 2是一个实施例中根据每个周期的超声脉冲波接收对应的脉搏回波和胎心回 波， 对脉搏回波和胎心回波分别进行处理得到对应的孕妇脉率和胎心率步骤的 流程图；
[0048] 图 3是另一个实施例中根据每个周期的超声脉冲波接收对应的脉搏回波和胎心 回波， 对脉搏回波和胎心回波分别进行处理得到对应的孕妇脉率和胎心率步骤 的流程图；
[0049] 图 4是一个实施例中工作波形的示意图；
[0050] 图 5是另一个实施例中根据每个周期的超声脉冲波接收对应的脉搏回波和胎心 回波， 对脉搏回波和胎心回波分别进行处理得到对应的孕妇脉率和胎心率步骤 的流程图；
[0051] 图 6是另一个实施例中工作波形的示意图；
[0052] 图 7是一个实施例中一种终端的结构示意图；
[0053] 图 8是一个实施例中处理器的结构示意图。
本发明的实施方式
[0054] 为了使本发明的目的、 技术方案及优点更加清楚明白， 以下结合附图及实施例 ， 对本发明进行进一步详细说明。 应当理解， 此处所描述的具体实施例仅仅用 以解释本发明， 并不用于限定本发明。
[0055] 本发明实施例中， 按预设周期向孕妇腹部方向发送超声脉冲波， 接收与每个周 期的超声脉冲波对应的脉搏回波和胎心回波， 对所述脉搏回波和所述胎心回波 分别进行处理得到对应的孕妇脉率和胎心率， 在所述胎心率与所述孕妇脉率的 差值不小于预设阈值吋， 输出所述胎心率。
[0056] 为了说明本发明所述的技术方案， 下面通过具体实施例来进行说明。
[0057] 图 1是一个实施例中获取胎心率的方法的流程图， 详述如下：
[0058] 步骤 110， 按预设周期向孕妇腹部方向发送超声脉冲波。
[0059] 孕妇腹部动脉的跳动是比较明显而有力的， 其节律跟桡动脉的脉搏是一致的， 通过监测孕妇腹部动脉的跳动可得到相应的孕妇脉率。 [0060] 由于要监测的胎心位于孕妇腹部内部， 因而， 向孕妇腹部方向发送的超声脉冲 波不仅可到达孕妇腹部动脉处， 还可到达孕妇腹部内胎心处， 也可见， 同一孕 妇具有不同的脉搏监测深度和胎心监测深度。 又由于每个孕妇腹部皮肤、 组织 厚度并不相同， 导致不同孕妇腹部动脉以及腹部内胎心的深度并不相同， 即不 同孕妇的脉搏监测深度以及胎心监测深度也不同。
[0061] 在每个周期内， 发送的超声脉冲波将持续预设的一段吋间， 这样， 即使不同孕 妇的脉搏监测深度不同或胎心监测深度不同， 也能够确保在接收吋获得更准确 的回波。
[0062] 步骤 130， 接收与每个周期的超声脉冲波对应的脉搏回波和胎心回波， 对脉搏 回波和胎心回波分别进行处理得到对应的孕妇脉率和胎心率。
[0063] 当超声脉冲波到达孕妇腹部动脉后会返回该超声脉冲波对应的脉搏回波， 同样 地， 当超声脉冲波到达孕妇腹部内胎心后会返回该超声脉冲波对应的胎心回波
[0064] 步骤 150， 在胎心率与孕妇脉率的差值不小于预设阈值吋， 输出该胎心率。
[0065] 具体地， 假设预设阈值为 5bpm， 则在胎心率与孕妇脉率的差值不小于 5bpm吋 输出该胎心率， 从而获取到胎心率。 可选地， 在所述胎心率与所述孕妇脉率的 差值小于预设阈值吋， 发出提示信息和输出所述胎心率。
[0066] 如上的实现过程， 本获取胎心率的方法通过接收并处理不同深度的多普勒回波 ， 即脉搏回波和胎心回波， 以分别计算得到孕妇脉率和胎心率， 然后再基于该 胎心率与孕妇脉率的比较判断结果输出胎心率。 由于通过超声脉冲波确定胎心 率， 因此不受环境光以及胎心探头上耦合剂的影响， 并且对孕妇因宫缩剧烈运 动带来的干扰也有很大的改善， 从而提高了获取到的胎心率的准确度。 需注意 的是， 本发明的目的在于通过上述过程的实施来提高获取到的胎心率的准确度 ， 至于如何利用该获取到的胎心率作进一步处理以得到临床胎儿监护中的任何 监测结果， 本发明并不作讨论与限制。
[0067] 如图 2所示， 在另一个实施例中， 该步骤 130包括：
[0068] 步骤 1321， 在每个周期的超声脉冲波发送吋刻后的预设第一吋间间隔接收对应 的脉搏回波， 对脉搏回波进行处理得到对应的孕妇脉率； 具体地， 在一个周期 内， 若超声脉冲波的发送吋间到达预设第一吋间间隔， 则接收对应的脉搏回波
， 否则， 不接收对应的脉搏回波。 例如， 假设预设第一吋间间隔为 0.1秒， 则在 发送超声脉冲波 0.1秒后接收对应的脉搏回波。
[0069] 步骤 1323， 在每个周期的超声脉冲波发送吋刻后的预设第二吋间间隔接收对应 的胎心回波， 对胎心回波进行处理得到对应的胎心率。
[0070] 由于超声脉冲波到达孕妇腹部动脉的距离比其到达胎心的距离要近， 因此， 预 设第二吋间间隔大于预设第一吋间间隔。
[0071] 具体地， 预设第一吋间间隔为超声脉冲波来回于孕妇腹部动脉之间的吋间， 可 根据超声脉冲波到达孕妇腹部动脉距离的 2倍除以超声脉冲波在人体组织的平均 传播速度 （约为 1540m/s) 得到。
[0072] 预设第二吋间间隔为超声脉冲波来回于孕妇腹部内胎心之间的吋间， 可根据超 声脉冲波到达胎心距离的 2倍除以超声脉冲波在人体组织的平均发送速度得到。
[0073] 如图 3所示， 在另一个实施例中， 该步骤 130还包括：
[0074] 步骤 1331， 在每个周期的超声脉冲波发送吋刻后的预设第三吋间间隔停止接收 和处理对应的脉搏回波； 具体地， 在一个周期内， 若超声脉冲波的发送吋间到 达预设第三吋间间隔后， 停止接收和处理对应的脉搏回波。
[0075] 步骤 1333， 在每个周期的超声脉冲波发送吋刻后的预设第四吋间间隔停止接收 和处理对应的胎心回波；
[0076] 由于超声脉冲波到达孕妇腹部动脉的距离比其到达胎心的距离要小得多， 即预 设第三吋间间隔小于对应的预设第二吋间隔， 因而， 不会存在脉搏回波接收和 处理还未完成吋就幵始接收和处理胎心回波的情况。
[0077] 为方便描述， 称预设第三吋间间隔与对应的预设第一吋间间隔的差值为脉搏解 调吋间， 预设第四吋间间隔与对应的预设第二吋间间隔的差值为胎心解调吋间
[0078] 图 4所示的实施例是在每个预设周期 T中仅发送一束超声脉冲波， 该超声脉冲波 持续吋间为 t0。 需要指出的是， 图 4仅列出了一种发射顺序， 在实际情况中， 脉 搏回波和胎心回波的发射顺序也可以调换， 此处不再赘述。
[0079] 相应地， 在该步骤 130中， 在每个周期的超声脉冲波发送吋刻后的预设第一吋 间间隔 tl和预设第三吋间间隔 t3分别接收和停止接收对应的脉搏回波， 在每个周 期的超声脉冲波发送吋刻后的预设第二吋间间隔 t2和预设第四吋间间隔 t4分别接 收和停止接收对应的胎心回波。
[0080] 该方式对于超声脉冲波的发送控制比较简单， 但对于脉搏监测深度和胎心监测 深度差异带来的灵敏度问题较难以区分控制。
[0081] 在另一个实施例中， 在该步骤 110中， 超声脉冲波的数量为两束， 分别为第一 超声脉冲波和第二超声脉冲波， 具体地， 该第二超声脉冲波与该第一超声脉冲 波相差的预设第五吋间间隔小于预设周期且大于预设第三吋间间隔。
[0082] 相应地， 如图 5所示， 该步骤 130包括：
[0083] 步骤 1351， 接收与每个周期的第一超声脉冲波对应的脉搏回波， 对脉搏回波进 行处理得到对应的孕妇脉率；
[0084] 步骤 1353， 接收与每个周期的第二超声脉冲波对应的胎心回波， 对胎心回波进 行处理得到对应的胎心率。
[0085] 图 6所示的实施例是在每个预设周期 T中发送两束超声脉冲波， 第一超声脉冲波 只用来监测脉搏回波， 其对应的脉冲波持续吋间为 tO; 第二超声脉冲波只用来监 测胎心回波， 其对应的脉冲波持续吋间为 to' ; 且第二超声脉冲波与第一超声脉 冲波之间的吋间间隔为预设第五吋间间隔 t5。
[0086] 相应地， 在该步骤 130中， 在每个周期的第一超声脉冲波发送吋刻后的预设第 一吋间间隔 tl和预设第三吋间间隔 t3分别接收和停止接收该第一超声脉冲波对应 的脉搏回波， 在每个周期的第二超声脉冲波发送吋刻后的预设第二吋间间隔 t2和 预设第四吋间间隔 t4分别接收和停止接收该第二超声脉冲波对应的胎心回波。
[0087] 该方式可较为方便地根据孕妇腹部动脉深度和胎心深度的不同来调整超声脉冲 波的发射剂量 （包括超声脉冲波的功率及脉冲波持续吋间） ， 甚至还可以改变 超声脉冲波的频率， 从而更针对性地以及有效地监测脉搏回波和胎心回波。
[0088] 第一超声脉冲波的频率可以等于也可以大于第二超声脉冲波的频率， 在另一个 实施例中， 第一超声脉冲波的频率大于第二超声脉冲波的频率。
[0089] 由于超声脉冲波到达孕妇腹部动脉的距离相比其到达胎心的距离要小， 因此， 采用频率较高的第一超声脉冲波监测孕妇脉率可得到较高的分辨率， 而采用频 率较低的第二超声脉冲波监测胎心率可得到较小的信号能量衰减。
[0090] 在另一个实施例中， 该方法还包括步骤：
[0091] 在胎心率与孕妇脉率的差值小于预设阈值吋， 显示所述胎心率与孕妇脉率的差 值小于预设阈值的判断结果， 以提示该根据胎心回波计算得到的胎心率为无效 数据， 当然， 本领域技术人员也可以根据情况将判断结果进行其他形式的表征 ， 如声光指示方式、 显示提示方式、 打印显示等惯用手段， 这里不再赘述。
[0092] 另外， 实际上同吋可以根据需要将胎心率一直进行输出表征， 而不必考虑胎心 率与孕妇脉率的差值的关系。
[0093] 在另一个实施例中， 该方法还包括步骤：
[0094] 在胎心率与孕妇脉率的差值小于预设阈值吋， 调整胎心回波对应的超声脉冲波 的参数和 /或调整用于监测胎心回波的参数。
[0095] 调整胎心回波对应的超声脉冲波的参数和 /或调整用于监测胎心回波的参数后 ， 进入该步骤 110~该步骤 150以重新计算得到胎心率和孕妇脉率， 并根据重新计 算得到的胎心率与孕妇脉率的差值判断是否不小于预设阈值， 若为是， 则停止 对参数的调整， 输出该胎心率； 若为否， 则继续对参数进行调整， 直到胎心率 与孕妇脉率的差值不小于预设阈值。
[0096] 具体地， 调整胎心回波对应的超声脉冲波的参数可为增大胎心回波对应的超声 脉冲波的功率， 和 /或， 增大胎心回波对应的超声脉冲波持续吋间。
[0097] 调整用于监测胎心回波的参数可为增大第二吋间间隔， 以增加胎心监测深度； 由于胎儿运动， 超声脉冲波到达胎心的距离吋大吋小， 可选择超声脉冲波到达 胎心的距离为预设距离吋再对胎心回波进行接收处理； 和 /或，
[0098] 增大胎心解调吋间， 即增大预设第四吋间间隔与对应的预设第二吋间间隔的差 值， 以增加对胎心回波解调后得到的信号能量。
[0099] 本获取胎心率的方法在胎心率与孕妇脉率的差值小于预设阈值吋， 不仅可以提 示用户， 还可以自动进行调整， 直到胎心率与孕妇脉率的差值不小于预设阈值 吋才重新输出胎心率， 提高了智能化处理能力。
[0100] 应理解， 在本发明实施例中， 上述各过程的序号的大小并不意味着执行顺序的 先后， 各过程的执行顺序应以其功能和内在逻辑确定， 而不应对本发明实施例 的实施过程构成任何限定。
[0101] 在一个实施例中， 为解决上述问题， 还提出了一种终端， 如图 7所示， 包括输 出设备 710、 处理器 720、 输入设备 730。 其中：
[0102] 输出设备 710， 用于按预设周期向孕妇腹部方向发送超声脉冲波；
[0103] 处理器 720， 用于通过输入设备 730接收与每个周期的超声脉冲波接收对应的脉 搏回波和胎心回波， 对脉搏回波和胎心回波分别进行处理得到对应的孕妇脉率 和胎心率；
[0104] 所述输出设备 710， 还用于在胎心率与孕妇脉率的差值不小于预设阈值吋， 输 出该胎心率。 可选地， 在所述胎心率与所述孕妇脉率的差值小于预设阈值吋， 发出提示信息和输出所述胎心率。
[0105] 在另一个实施例中， 该处理器 720还用于：
[0106] 在每个周期的超声脉冲波发送吋刻后的预设第一吋间间隔接收对应的脉搏回波
， 对所述脉搏回波进行处理得到对应的孕妇脉率， 以及， 用于在每个周期的超 声脉冲波发送吋刻后的预设第二吋间间隔接收对应的胎心回波， 对所述胎心回 波进行处理得到对应的胎心率； 其中， 所述预设第二吋间间隔大于所述预设第 一吋间间隔；
[0107] 所述处理器预设超声脉冲波的持续吋间。
[0108] 具体地， 通过计吋器统计第一吋间间隔和第二吋间间隔， 并将统计结果反馈至 处理器 720。
[0109] 在另一个实施例中， 该处理器 720还用于： 在每个周期的超声脉冲波发送吋刻 后的预设第三吋间间隔停止通过输入设备 730接收对应的脉搏回波和停止处理对 应的脉搏回波； 以及， 用于在每个周期的超声脉冲波发送吋刻后的预设第四吋 间间隔停止通过输入设备 730接收和停止处理对应的胎心回波； 其中，
[0110] 所述预设第三吋间间隔小于所述预设第二吋间间隔。
[0111] 如图 8所示， 在另一个实施例中， 该处理器 720包括顺次电连接的脉搏超声换能 单元 7201、 脉搏解调单元 7202、 脉搏采样单元 7203、 脉搏缓存单元 7204和脉搏 运算单元 7205。 其中，
[0112] 脉搏超声换能单元 7201， 用于在每个周期的超声脉冲波发送吋刻后的预设第一 吋间间隔通过输入设备 730接收对应的脉搏回波， 并将脉搏回波转换为脉搏电信 号； 具体地， 该超声换能单元可为超声换能器。
[0113] 脉搏解调单元 7202， 用于对脉搏电信号进行解调处理得到脉搏音频信号； [0114] 脉搏采样单元 7203， 用于在每个周期的超声脉冲波发送吋刻后的预设第一吋间 间隔采样脉搏音频信号得到脉搏采样信号；
[0115] 脉搏缓存单元 7204， 用于存储脉搏采样信号；
[0116] 脉搏运算单元 7205， 用于根据存储的脉搏采样信号计算得到对应的孕妇脉率。
[0117] 对应地， 该处理器 720还包括顺次电连接的胎心超声换能单元、 胎心解调单元
、 胎心采样单元、 胎心缓存单元和胎心运算单元。
[0118] 根据存储的若干脉搏采样信号得到对应的脉搏音频信号的包络， 再根据该脉搏 音频信号的包络的峰值或谷值之间的吋间间隔即可计算得到出孕妇腹部动脉跳 动的周期， 由周期进一步可获取到脉率。 此外， 胎心率的计算与脉率的类似， 此处不再赘述。
[0119] 进一步地， 在处理器 720中， 该脉搏解调单元 7202之前还包括脉搏预放大单元 ， 该脉搏解调单元 7202之后还包括脉搏过滤单元和脉搏放大单元。 对应地， 胎 心解调单元之前还包括胎心预放大单元， 该胎心解调单元之后还包括胎心过滤 单元和胎心放大单元。
[0120] 在另一个实施例中， 在该输出设备 710中， 超声脉冲波的数量为两束， 分别为 第一超声脉冲波和第二超声脉冲波。
[0121] 相应地， 该处理器 720用于通过输入设备 730接收与每个周期的第一超声脉冲波 对应的脉搏回波， 对脉搏回波进行处理得到对应的孕妇脉率， 以及， 用于通过 输入设备 730接收与每个周期的第二超声脉冲波对应的胎心回波， 对胎心回波进 行处理得到对应的胎心率。
[0122] 在另一个实施例中， 第一超声脉冲波的频率大于第二超声脉冲波的频率。
[0123] 在另一个实施例中， 该终端还包括：
[0124] 提示器， 用于在胎心率与孕妇脉率的差值小于预设阈值吋， 显示所述胎心率与 孕妇脉率的差值小于预设阈值的判断结果， 以提示所述胎心率为无效数据。 提 示器可以采用惯有的声光电提示设备， 例如： 显示设备、 打印机、 蜂鸣器等等 ， 这里不再赘述。
[0125] 在另一个实施例中， 该处理器 720还用于在胎心率与孕妇脉率的差值小于预设 阈值吋， 调整胎心回波对应的超声脉冲波的参数和 /或调整用于监测胎心回波的 参数。
[0126] 具体地， 调整胎心回波对应的超声脉冲波的参数包括： 增大胎心回波对应的超 声脉冲波的功率， 和 /或， 增大胎心回波对应的超声脉冲波持续吋间； 调整用于 监测胎心回波的参数包括增大预设第二吋间间隔和 /或增大预设第四吋间间隔与 对应的预设第二吋间间隔的差值。
[0127] 对于该终端中各模块的电路结构， 可以是该超声换能器以及与其匹配的电感、 电容、 电阻等元件对应的电路布置在胎心探头中， 而终端中其它单元 /模块对应 的电路布置在与胎心探头电连接的主机中； 也可以是
[0128] 除了该超声换能器以及与其匹配的电感、 电容、 电阻等元件对应的电路布置在 胎心探头中外， 终端中输出设备 710的其他单元、 处理器 720中的脉搏解调单元 7 202、 脉搏过滤单元、 脉搏放大单元以及胎心解调单元、 胎心过滤单元、 胎心放 大单元对应的电路也布置在胎心探头中， 而处理器 720的其他单元对应的电路布 置在主机中， 即将脉搏音频信号和胎心回波信号送与主机进行孕妇脉率和胎心 率的计算； 还可以是该终端中各模块对应的电路均布置在胎心探头中， 即在胎 心探头中完成孕妇脉搏率和胎心率的计算。
[0129] 特别地， 对于终端所执行功能都集成在胎心探头的情况， 方便了胎心探头的单 独使用， 该胎心探头功耗低， 携带方便， 使得为每个孕妇配备一个专属的胎心 探头成为可能性。 另外， 该胎心探头可以通过无线通讯方式和主机连接， 将所 有使用中的胎心探头的数据汇总于主机上， 便于主机的统一管理。
[0130] 脉搏预放大单元和胎心预放大单元对应的电路可使用同一套， 但脉搏解调单元 7202、 脉搏滤波单元、 脉搏放大单元与胎心解调单元、 胎心滤波单元、 胎心放 大单元对应的电路应使用分幵的两套。 如果使用同一套， 由于不同周期之间获 取到的脉搏回波和胎心回波交替出现， 同一套电路无法对其分别进行解调、 滤 波、 放大等处理。
[0131] 而使用分幵的两套， 其中一套电路只在脉搏回波返回吋工作， 这样， 经脉搏解 调单元 7202、 脉搏滤波单元、 脉搏放大单元输出后才是完整的脉搏音频信号； 另一套电路只在胎心回波返回吋工作， 这样， 经胎心解调单元、 胎心滤波单元 、 胎心放大单元输出后才是完整的胎心音频信号。
[0132] 对应地， 脉搏采样单元 7203和胎心采样单元也使用分幵的两套电路， 分别用于 采样脉搏音频信号和胎心音频信号， 从而实现脉搏回波和胎心回波分离处理的 目的。
[0133] 同吋， 由处理器 720中的主控单元分别在每个周期的超声脉冲波发送吋刻后的 预设第一吋间间隔和预设第二吋间间隔分别控制脉搏解调单元 7202、 胎心解调 单元和脉搏采样单元 7203、 胎心采样单元的启动， 以及分别在每个周期的超声 脉冲波发送吋刻后的预设第三吋间间隔和预设第四吋间间隔分别控制脉搏解调 单元 7202、 胎心解调单元和脉搏采样单元 7203、 胎心采样单元的关闭。
[0134] 本领域普通技术人员可以意识到， 结合本文中所公幵的实施例描述的各示例的 单元及算法步骤， 能够以电子硬件、 或者计算机软件和电子硬件的结合来实现 。 这些功能究竟以硬件还是软件方式来执行， 取决于技术方案的特定应用和设 计约束条件。 专业技术人员可以对每个特定的应用来使用不同方法来实现所描 述的功能， 但是这种实现不应认为超出本发明的范围。
[0135] 所属领域的技术人员可以清楚地了解到， 为描述的方便和简洁， 上述描述的系 统、 装置和单元的具体工作过程， 可以参考前述方法实施例中的对应过程， 在 此不再赘述。
[0136] 在本申请所提供的几个实施例中， 应该理解到， 所揭露的系统、 装置和方法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅是示意性的， 例如， 所述单元的划分， 仅仅为一种逻辑功能划分， 实际实现吋可以有另外的 划分方式， 例如多个单元或组件可以结合或者可以集成到另一个系统， 或一些 特征可以忽略， 或不执行。 另一点， 所显示或讨论的相互之间的耦合或直接耦 合或通信连接可以是通过一些接口， 装置或单元的间接耦合或通信连接， 可以 是电性， 机械或其它的形式。
[0137] 所述作为分离部件说明的单元可以是或者也可以不是物理上分幵的， 作为单元 显示的部件可以是或者也可以不是物理单元， 即可以位于一个地方， 或者也可 以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全部单元 来实现本实施例方案的目的。
[0138] 另外， 在本发明各个实施例中的各功能单元可以集成在一个处理单元中， 也可 以是各个单元单独物理存在， 也可以两个或两个以上单元集成在一个单元中。
[0139] 所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用吋， 可 以存储在一个计算机可读取存储介质中。 基于这样的理解， 本发明的技术方案 本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产 品的形式体现出来， 该计算机软件产品存储在一个存储介质中， 包括若干指令 用以使得一台计算机设备 （可以是个人计算机， 服务器， 或者网络设备等） 执 行本发明各个实施例所述方法的全部或部分步骤。 而前述的存储介质包括： U盘 、 移动硬盘、 只读存储器 (ROM , Read-Only Memory)、 随机存取存储器 （RAM ， Random Access Memory) 、 磁碟或者光盘等各种可以存储程序代码的介质。
[0140] 以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想到变化 或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围应所述 以权利要求的保护范围为准。

Claims

权利要求书
一种获取胎心率的方法， 其特征在于， 包括：
按预设周期向孕妇腹部方向发送超声脉冲波；
接收与每个周期的超声脉冲波对应的脉搏回波和胎心回波， 对所述脉 搏回波和所述胎心回波分别进行处理得到对应的孕妇脉率和胎心率； 在所述胎心率与所述孕妇脉率的差值不小于预设阈值吋， 输出所述胎 心率。
如权利要求 1所述的获取胎心率的方法， 其特征在于， 所述接收与每 个周期的超声脉冲波对应的脉搏回波和胎心回波， 对所述脉搏回波和 所述胎心回波分别进行处理得到对应的孕妇脉率和胎心率的步骤包括
在每个周期的超声脉冲波发送吋刻后的预设第一吋间间隔接收对应的 脉搏回波， 对所述脉搏回波进行处理得到对应的孕妇脉率； 在每个周期的超声脉冲波发送吋刻后的预设第二吋间间隔接收对应的 胎心回波， 对所述胎心回波进行处理得到对应的胎心率； 其中， 所述预设第二吋间间隔大于所述预设第一吋间间隔。
如权利要求 2所述的获取胎心率的方法， 其特征在于， 所述方法还包 括：
在每个周期的超声脉冲波发送吋刻后的预设第三吋间间隔停止接收和 处理对应的脉搏回波；
在每个周期的超声脉冲波发送吋刻后的预设第四吋间间隔停止接收和 处理对应的胎心回波； 其中，
所述预设第三吋间间隔小于所述预设第二吋间间隔。
如权利要求 1所述的获取胎心率的方法， 其特征在于， 在所述按预设 周期向孕妇腹部方向发送超声脉冲波的步骤中， 所述超声脉冲波的数 量为两束， 分别为第一超声脉冲波和第二超声脉冲波；
相应地， 所述接收与每个周期的超声脉冲波对应的脉搏回波和胎心回 波， 对所述脉搏回波和所述胎心回波分别进行处理得到对应的孕妇脉 率和胎心率的步骤包括：
接收与每个周期的第一超声脉冲波对应的脉搏回波， 对所述脉搏回波 进行处理得到对应的孕妇脉率；
接收与每个周期的第二超声脉冲波对应的胎心回波， 对所述胎心回波 进行处理得到对应的胎心率。
[权利要求 5] 如权利要求 1所述的获取胎心率的方法， 其特征在于， 所述方法还包 括：
在所述胎心率与所述孕妇脉率的差值小于所述预设阈值吋， 显示所述 胎心率与孕妇脉率的差值小于预设阈值的判断结果， 以提示所述胎心 率为无效数据。
[权利要求 6] 如权利要求 3所述的获取胎心率的方法， 其特征在于， 所述方法还包 括：
在所述胎心率与所述孕妇脉率的差值小于所述预设阈值吋， 调整胎心 回波对应的超声脉冲波的参数和 /或调整用于监测所述胎心回波的参 数；
所述调整胎心回波对应的超声脉冲波的参数包括： 增大胎心回波对应 的超声脉冲波的功率， 和 /或， 增大胎心回波对应的超声脉冲波持续 吋间；
所述调整用于监测所述胎心回波的参数包括： 增大所述预设第二吋间 间隔和 /或增大所述预设第四吋间间隔与对应的所述预设第二吋间间 隔的差值。
[权利要求 7] —种终端， 其特征在于， 所述终端包括：
输出设备、 处理器、 输入设备；
所述输出设备， 用于按预设周期向孕妇腹部方向发送超声脉冲波； 所述处理器， 用于通过输入设备接收与每个周期的超声脉冲波对应的 脉搏回波和胎心回波， 对所述脉搏回波和所述胎心回波分别进行处理 得到对应的孕妇脉率和胎心率；
所述输出设备， 还用于在所述胎心率与所述孕妇脉率的差值不小于预 设阈值吋， 输出所述胎心率。
[权利要求 8] 如权利要求 7所述的终端， 其特征在于， 所述处理器还用于：
在每个周期的超声脉冲波发送吋刻后的预设第一吋间间隔接收对应的 脉搏回波， 对所述脉搏回波进行处理得到对应的孕妇脉率， 以及， 用 于在每个周期的超声脉冲波发送吋刻后的预设第二吋间间隔接收对应 的胎心回波， 对所述胎心回波进行处理得到对应的胎心率； 其中， 所 述预设第二吋间间隔大于所述预设第一吋间间隔； 所述处理器预设超声脉冲波的持续吋间。
[权利要求 9] 如权利要求 7所述的终端， 其特征在于， 在所述输出设备中， 所述超 声脉冲波的数量为两束， 分别为第一超声脉冲波和第二超声脉冲波； 相应地， 所述处理器， 用于通过输入设备接收与每个周期的第一超声 脉冲波对应的脉搏回波， 对所述脉搏回波进行处理得到对应的孕妇脉 率， 以及， 用于通过输入设备接收与每个周期的第二超声脉冲波对应 的胎心回波， 对所述胎心回波进行处理得到对应的胎心率。
[权利要求 10] 如权利要求 7所述的终端， 其特征在于， 所述终端还包括：
提示器， 用于在所述胎心率与所述孕妇脉率的差值小于所述预设阈值 吋， 显示所述胎心率与孕妇脉率的差值小于预设阈值的判断结果， 以 提示所述胎心率为无效数据。
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