Method and terminal for obtaining fetal heart

• US 10,736,522 B2
• Filed: 12/23/2016
• Issued: 08/11/2020
• Est. Priority Date: 01/22/2016
• Status: Active Grant

• Current Assignee: Edan Instruments, Inc.
• Original Assignee: Edan Instruments, Inc.
• Inventors: Liao, Weita, Tan, Juanjuan
• Primary Examiner(s): Voorhees, Catherine M
• Assistant Examiner(s): Dinga, Roland
• Application Number:
  US15/518,163
• Publication Number:
  US 20180042500A1
• Time in Patent Office: 1,327 Days
• CPC Class Codes: A61B 5/0011 Foetal or obstetric data
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/02411 of foetuses
• CPC Class Codes: A61B 5/4343 Pregnancy and labour monitoring, e.g. for labour onset detection
• CPC Class Codes: A61B 8/00 Diagnosis using ultrasonic, sonic or infrasonic waves imaging of objects using sonar G01S15/00
• CPC Class Codes: A61B 8/02 Measuring pulse or heart rate
• CPC Class Codes: A61B 8/0866 involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby

Abstract

A method for obtaining fetal heart rate which includes: transmitting an ultrasonic pulse wave (110) towards an abdomen of a pregnant woman according to a preset period; receiving a pulse echo and a fetal heart echo corresponding to the ultrasonic pulse wave in each of the periods, and processing the pulse echo and the fetal heart echo independently to obtain a corresponding pulse rate of the pregnant woman and the fetal heart rate (130); outputting the fetal heart rate (150) when a difference value between the fetal heart rate and the pulse rate of the pregnant woman is not lower than a preset threshold. Furthermore, a system and an apparatus for obtaining fetal heart rate are also provided. The method and terminal for obtaining a fetal heart rate improves accuracy of the obtained fetal heart rate.

Claims

1. A method for obtaining fetal heart rate, wherein the method comprises:

transmitting an ultrasonic pulse wave towards an abdomen of a pregnant woman according to a period;

receiving a pulse echo and a fetal heart echo corresponding to the ultrasonic pulse wave in each of the periods, and processing the pulse echo and the fetal heart echo independently to obtain a corresponding pulse rate of the pregnant woman and the fetal heart rate;

outputting the fetal heart rate when a difference value between the fetal heart rate and the pulse rate of the pregnant woman is not lower than a preset threshold.

2. The method for obtaining fetal heart rate of claim 1, wherein the step of receiving a pulse echo and a fetal heart echo corresponding to the ultrasonic pulse wave in each of the periods, and processing the pulse echo and the fetal heart echo independently to obtain a corresponding pulse rate of the pregnant woman and the fetal heart rate comprises:

receiving a corresponding pulse echo at a first preset time interval after the time of sending the ultrasonic pulse wave in each of the periods, and processing the pulse echo to obtain the corresponding pulse rate of the pregnant woman;

receiving a corresponding fetal heart echo at a second preset time interval after the time of sending the ultrasonic pulse wave in each of the periods, and processing the fetal heart echo to obtain the corresponding fetal heart rate;

wherein,

the second preset time interval is longer than the first preset time interval.

3. The method for obtaining fetal heart rate of claim 2, wherein, the method further comprises:

stopping receiving and processing the corresponding pulse echo at a third preset time interval after the time of sending the ultrasonic pulse wave in each of the periods;

stopping receiving and processing the corresponding fetal heart echo at a fourth preset time interval after the time of sending the ultrasonic pulse wave in each of the periods;

wherein,

the third preset time interval is shorter than corresponding second preset time interval.

4. The method for obtaining fetal heart rate of claim 3, wherein the method further includes:

when the difference value between the fetal heart rate and the pulse rate of the pregnant woman is lower than the preset threshold, adjusting parameters of the ultrasonic pulse wave corresponding to the fetal heart echo and/or adjusting parameters configured to monitor the fetal heart echo;

adjusting 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 parameters configured to monitor the fetal heart echo includes;

increasing the second time interval and/or increasing the difference value between the fourth preset time interval and the corresponding second preset time interval.

5. The method for obtaining fetal heart rate of claim 1, wherein in the step of transmitting an ultrasonic pulse wave towards an abdomen of a pregnant woman according to a period, the ultrasonic pulse wave has two beams, which are respectively a first ultrasonic pulse wave and a second ultrasonic pulse wave;

correspondingly, the step of receiving a pulse echo and a fetal heart echo corresponding to the ultrasonic pulse wave in each of the periods, and processing the pulse echo and the fetal heart echo independently to obtain a corresponding pulse rate of the pregnant woman and the fetal heart rate comprises;

receiving a pulse echo corresponding to the first ultrasonic pulse wave in each of the periods, and processing the pulse echo to obtain the corresponding pulse rate of the pregnant woman;

receiving a fetal heart echo corresponding to the second ultrasonic pulse wave in each of the periods, and processing the fetal heart echo to obtain a corresponding fetal heart rate.

6. The method for obtaining fetal heart rate of claim 1, wherein the method further comprises:

when the difference value between the fetal heart rate and the pulse rate of the pregnant woman is lower than the preset threshold, displaying a judgment result that the difference value between the fetal heart rate and the pulse rate of the pregnant woman is lower than the preset threshold so as to remind that the fetal heart rate is invalid data.

7. A terminal, wherein the terminal comprises:

an input device, an output device and a processor;

the output device is configured to transmit an ultrasonic pulse wave towards an abdomen of a pregnant woman according to a period;

the processor is configured to receive a pulse echo and a fetal heart echo corresponding to the ultrasonic pulse wave in each of the periods through the input device, and respectively process the pulse echo and the fetal heart echo to obtain a corresponding pulse rate of the pregnant woman and fetal heart rate;

the output device is further configured to output the fetal heart rate when the difference value between the fetal heart rate and the pulse rate of the pregnant woman is not lower than a preset threshold.

8. The terminal of claim 7, wherein the processor is further configured to:

receive a corresponding pulse echo at a first preset time interval after time of sending the ultrasonic pulse wave in each of the periods, process the pulse echo to obtain a corresponding pulse rate of the pregnant woman, and receive a corresponding fetal heart echo at a second preset time interval after time of sending the ultrasonic pulse wave in each of the periods, and process the fetal heart echo to obtain a corresponding fetal heart rate;

wherein the second preset time interval is longer than the first preset time interval;

the processor presets duration of the ultrasonic pulse wave.

9. The terminal of claim 7, wherein in the output device, the ultrasonic pulse wave has two beams, which are separately a first ultrasonic pulse wave and a second ultrasonic pulse wave;

correspondingly, the processor is configured to receive a pulse echo corresponding to the first ultrasonic pulse wave in each of the periods through the input device and process the pulse echo to obtain the corresponding pulse rate of the pregnant woman, and configured to receive fetal heart echo corresponding to the second ultrasonic pulse wave in each of the periods through the input device and process the fetal heart echo to obtain the corresponding fetal heart rate.

10. The terminal of claim 7, wherein the terminal further comprises:

a displayer configured to display a judgment result that the difference value between the fetal heart rate and the pulse rate of the pregnant woman is lower than the preset threshold when the difference value between the fetal heart rate and the pulse rate of the pregnant woman is lower than the preset threshold so as to remind that the fetal heart rate is invalid data.