A post-cardiac surgery atrial fibrillation monitoring and alert system

Abstract

The utility model discloses a kind of postoperative atrial fibrillation monitoring alarm systems, it is related to the technical field of atrial fibrillation monitoring, and it includes: main control module, detection module, storage module, display module, input-output module and alarm module;Detection module detects the electrocardiosignal, pulse voltage signal and heart sound signal of postoperative patient, sends to main control module;Main control module carries out sampling to electrocardiosignal, pulse voltage signal and heart sound signal, and stores to storage module;According to the instruction of input-output module, the signal after selection sampling is displayed through display module, and the signal stored is selected from storage module and is displayed through display module;Threshold comparison unit of main control module sends signal to alarm module according to heart rate signal, pulse signal, heart sound signal and threshold value, and alarm module sends alarm prompt.The utility model can monitor the sign data of postoperative patient and send alarm, remind medical staff to handle in time, reduce the influence of postoperative atrial fibrillation on patient recovery.

Description

Technical Field

[0001] This utility model relates to the field of atrial fibrillation monitoring technology, and more specifically to an atrial fibrillation monitoring and alarm system after cardiac surgery. Background Technology

[0002] Atrial fibrillation (AF) is a common arrhythmia, usually caused by irregular, rapid contractions of the atria. AF prevents blood from being completely pumped from the atria to the ventricles, affecting the heart's pumping function and leading to dangerous consequences such as decreased cardiac output and thrombosis. For patients undergoing cardiac surgery, the incidence of AF after coronary artery bypass grafting is 10%-40%, and after valve surgery, it can be as high as 60%. The incidence is even higher after major surgeries such as aortic surgery, severely impacting postoperative recovery and potentially worsening the patient's condition. This AF can significantly hinder postoperative recovery and may even exacerbate the patient's overall condition.

[0003] However, due to the randomness and uncertainty of the occurrence of atrial fibrillation after cardiac surgery, and the fact that doctors cannot constantly monitor and analyze the electrocardiograms and other data of postoperative cardiac patients, the occurrence of atrial fibrillation after cardiac surgery is often overlooked, leading to a worsening of the patient's condition, an increased risk of postoperative complications and death, and seriously threatening the life and health of postoperative cardiac patients.

[0004] Therefore, how to effectively monitor the vital signs of patients after cardiac surgery and issue an alarm when postoperative atrial fibrillation occurs to remind medical staff to take timely action is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a postoperative atrial fibrillation monitoring and alarm system, which monitors and displays the vital signs data such as heart rate, pulse rate, and heart sounds of postoperative cardiac patients in real time, and issues an alarm when abnormalities occur, thereby improving the postoperative survival rate of postoperative cardiac patients.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model discloses a postoperative atrial fibrillation monitoring and alarm system, comprising: a main control module, and a detection module, a storage module, a display module, an input / output module and an alarm module connected to the main control module;

[0008] The detection module detects the electrocardiogram signal, pulse voltage signal, and heart sound signal of the patient after cardiac surgery and sends them to the main control module;

[0009] The main control module samples the received electrocardiogram signal, pulse voltage signal, and heart sound signal and stores them in the storage module; according to the instructions of the input / output module, it selects the sampled signal and displays it through the display module; according to the instructions of the input / output module, it selects the stored signal from the storage module and displays it through the display module.

[0010] The main control module is equipped with a threshold comparison unit. It obtains a heart rate signal from the electrocardiogram signal and a pulse signal from the pulse voltage signal. It compares the difference between the maximum and minimum values ​​of the heart rate signal with a first threshold; if the difference is greater, it sends a first alarm signal to the alarm module. It also compares the difference between the heart rate signal and the pulse rate signal with a second threshold; if the difference is greater, it sends a second alarm signal to the alarm module. Finally, it compares the heart sound signal with a third threshold; if the difference is less than a third alarm signal, it sends a third alarm signal to the alarm module.

[0011] The alarm module issues an alarm prompt based on the received alarm signal.

[0012] Furthermore, the detection module includes an electrocardiogram (ECG) detection unit, a pulse rate detection unit, and a heart sound detection unit, which respectively acquire the ECG signal, the pulse voltage signal, and the heart sound signal; each unit of the detection module is connected to the corresponding signal input port of the main control module via a signal line.

[0013] Furthermore, the ECG detection unit includes an ECG electrode group, a first amplification circuit, a first filtering circuit, and a first output line connected in sequence. The ECG electrode group collects the original ECG signal of the patient after cardiac surgery. The first amplification circuit amplifies the signal collected by the ECG electrode group. The first filtering circuit filters the amplified signal to obtain the final output ECG signal, which is output by the first output line.

[0014] Furthermore, the pulse rate detection unit includes a piezoelectric pulse sensor, a second amplification circuit, a second filtering circuit, and a second output line connected in sequence. The piezoelectric pulse sensor collects the original pulse voltage signal of the patient after cardiac surgery. The second amplification circuit amplifies the signal collected by the piezoelectric pulse sensor. The second filtering circuit filters the amplified signal to obtain the final output pulse voltage signal, which is output by the second output line.

[0015] Furthermore, the heart sound detection unit includes a micro-sound sensor, a third amplification circuit, a third filtering circuit, and a third output line connected in sequence. The micro-sound sensor collects the original heart sound signal of the patient after cardiac surgery. The third amplification circuit amplifies the signal collected by the micro-sound sensor. The third filtering circuit filters the amplified signal to obtain the final output heart sound signal, which is output by the third output line.

[0016] Furthermore, the main control module includes a signal input port, a sampling unit, a main control MCU, an I / O port, and a threshold comparison unit;

[0017] The sampling unit samples the electrocardiogram signal, pulse voltage signal, and heart sound signal received by the signal input port, and transmits them to the main control MCU and the threshold comparison unit, respectively.

[0018] The main control MCU communicates with the storage module, the display module, and the input / output module through the I / O port, and executes the instructions of the input / output module; the main control MCU transmits the digital sampling signal received from the sampling unit to the storage module for storage;

[0019] The threshold comparison unit sends the heart rate signal and the pulse signal to the main control MCU. The main control MCU displays the real-time heart rate and real-time pulse rate on the display module according to the instructions of the input / output module. The threshold comparison unit sends the first alarm signal, the second alarm signal and the third alarm signal to the main control MCU, and sends them to the alarm module through the IO port.

[0020] Furthermore, the sampling unit includes a first AD converter, a second AD converter, and a third AD converter, which respectively sample the electrocardiogram signal, the pulse voltage signal, and the heart sound signal.

[0021] Furthermore, the threshold comparison unit includes a first counting unit, a second counting unit, a first comparison subunit, a second comparison subunit, and a third comparison subunit;

[0022] The first counting unit counts the peaks of the electrocardiogram signal to obtain a heart rate signal within a set time period; the second counting unit counts the peaks of the pulse voltage signal to obtain a pulse rate signal within a set time period.

[0023] The first comparison subunit stores the maximum and minimum values ​​of the heart rate signal within a set time period, as well as the first threshold, in its first register, second register, and third register, respectively. The first comparison subunit compares the difference between the first register and the second register with the threshold stored in the third register. If the difference is greater than the threshold, the first alarm signal is issued.

[0024] The fourth, fifth, and sixth registers of the second comparison subunit store the heart rate signal value, pulse rate signal value, and the second threshold for each time period, respectively; the second comparison subunit compares the difference between the fourth register and the fifth register with the threshold stored in the sixth register, and if the difference is greater than the threshold, it issues the second alarm signal;

[0025] The seventh register of the third comparison subunit stores the heart sound value at each time moment, and the eighth register stores the third threshold. The third comparison subunit compares the seventh register with the eighth register, and if the value is less than the threshold, it issues the third alarm signal.

[0026] Furthermore, it also includes a power supply module, which supplies power to the detection module, the main control module, the storage module, the display module, the alarm module, and the input / output module.

[0027] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a postoperative atrial fibrillation monitoring and alarm system, which can monitor the real-time heart rate, pulse rate and heart sounds of postoperative cardiac patients in real time, and determine whether postoperative atrial fibrillation has occurred based on the set threshold and issue an alarm to remind medical staff to deal with it in time, thereby reducing the impact of atrial fibrillation on the postoperative recovery of cardiac patients, improving the postoperative recovery effect of cardiac patients, and ensuring the life and health status of postoperative cardiac patients. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 A schematic diagram of the overall structure of this utility model.

[0030] Figure 2 A schematic diagram of the detection module structure provided by this utility model.

[0031] Figure 3 A schematic diagram of the main control module structure provided by this utility model.

[0032] Figure 4 A schematic diagram of the threshold comparison unit structure provided by this utility model. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model discloses a postoperative atrial fibrillation monitoring and alarm system, such as... Figure 1 As shown, it includes: a main control module, and a detection module, a storage module, a display module, an input / output module, and an alarm module connected to the main control module;

[0035] The detection module detects the electrocardiogram (ECG), pulse voltage, and heart sound signals of patients after cardiac surgery and sends them to the main control module.

[0036] The main control module samples the received electrocardiogram (ECG), pulse voltage, and heart sound signals and stores them in the storage module; according to the instructions of the input / output module, it selects the sampled signals and displays them through the display module; according to the instructions of the input / output module, it selects the stored signals from the storage module and displays them through the display module.

[0037] The main control module is equipped with a threshold comparison unit. It obtains the heart rate signal from the electrocardiogram signal and the pulse signal from the pulse voltage signal. It compares the difference between the maximum and minimum values ​​of the heart rate signal with the first threshold. If the difference is greater than the first threshold, it sends a first alarm signal to the alarm module. It compares the difference between the heart rate signal and the pulse signal with the second threshold. If the difference is greater than the second threshold, it sends a second alarm signal to the alarm module. It compares the heart sound signal with the third threshold. If the difference is less than the third threshold, it sends a third alarm signal to the alarm module.

[0038] The alarm module issues an alarm notification based on the received alarm signal.

[0039] In a specific embodiment, such as Figure 2 As shown, the detection module includes an electrocardiogram (ECG) detection unit, a pulse rate detection unit, and a heart sound detection unit, which respectively collect ECG signals, pulse voltage signals, and heart sound signals; each unit of the detection module is connected to the corresponding signal input port of the main control module through a signal line.

[0040] In one specific embodiment, the electrocardiogram (ECG) detection unit includes an ECG electrode group, a first amplification circuit, a first filtering circuit, and a first output line connected in sequence. The ECG electrode group collects the raw ECG signal of the patient after cardiac surgery. The first amplification circuit amplifies the signal collected by the ECG electrode group. The first filtering circuit filters the amplified signal to obtain the final output ECG signal, which is output by the first output line.

[0041] In one specific embodiment, the pulse rate detection unit includes a piezoelectric pulse sensor, a second amplification circuit, a second filtering circuit, and a second output line connected in sequence. The piezoelectric pulse sensor collects the raw pulse voltage signal of the patient after cardiac surgery. The second amplification circuit amplifies the signal collected by the piezoelectric pulse sensor. The second filtering circuit filters the amplified signal to obtain the final output pulse voltage signal, which is output by the second output line.

[0042] In one specific embodiment, the heart sound detection unit includes a micro-sound sensor, a third amplification circuit, a third filtering circuit, and a third output line connected in sequence. The micro-sound sensor collects the original heart sound signal of the patient after cardiac surgery. The third amplification circuit amplifies the signal collected by the micro-sound sensor. The third filtering circuit filters the amplified signal to obtain the final output heart sound signal, which is output by the third output line.

[0043] In a specific embodiment, such as Figure 3 As shown, the main control module includes a signal input port, a sampling unit, a main control MCU, an I / O port, and a threshold comparison unit;

[0044] The sampling unit samples the electrocardiogram signal, pulse voltage signal and heart sound signal received at the signal input port, and transmits them to the main control MCU and the threshold comparison unit respectively.

[0045] The main control MCU communicates with the storage module, display module, and input / output module through the I / O port, and executes the instructions of the input / output module, such as instructions to select and display ECG signals, pulse voltage signals, and heart sound signals, instructions to read stored records from the storage module, and instructions to set thresholds; the main control MCU transmits the digital sampling signals received from the sampling unit to the storage module for storage.

[0046] The threshold comparison unit sends the heart rate signal and pulse signal to the main control MCU. The main control MCU displays the real-time heart rate and real-time pulse rate on the display module according to the instructions of the input / output module. The threshold comparison unit sends the first alarm signal, the second alarm signal and the third alarm signal to the main control MCU, and sends them to the alarm module through the IO port.

[0047] In one specific embodiment, the sampling unit includes a first AD converter, a second AD converter, and a third AD converter, which respectively sample the electrocardiogram signal, pulse voltage signal, and heart sound signal.

[0048] In a specific embodiment, such as Figure 4 As shown, the threshold comparison unit includes a first counting unit, a second counting unit, a first comparison subunit, a second comparison subunit, and a third comparison subunit;

[0049] The first counting unit counts the peaks of the electrocardiogram signal to obtain the heart rate signal within a set time period; the second counting unit counts the peaks of the pulse voltage signal to obtain the pulse rate signal within a set time period.

[0050] The first comparison subunit stores the maximum and minimum values ​​of the heart rate signal within a set time period, as well as a first threshold, in its first register, second register, and third register, respectively. The first comparison subunit compares the difference between the first register and the second register with the threshold stored in the third register. If the difference is greater than the threshold, a first alarm signal is issued.

[0051] The fourth, fifth, and sixth registers of the second comparison subunit store the heart rate signal value, pulse rate signal value, and second threshold for each time period, respectively; the second comparison subunit compares the difference between the fourth and fifth registers with the threshold stored in the sixth register, and if it is greater than the threshold, it issues a second alarm signal;

[0052] The seventh register of the third comparison subunit stores the heart sound value at each time moment, and the eighth register stores the third threshold. The third comparison subunit compares the seventh register with the eighth register, and if the value is less than the threshold, it issues the third alarm signal.

[0053] Specifically, postoperative atrial fibrillation has three main characteristics: irregular heart rate, pulse rate less than heart rate, and fluctuating heart sound intensity. Irregular heart rate can be detected by measuring the difference between the maximum and minimum heart rate over a set time period after the heart surgery. The difference between the heart rate and pulse rate over the same time period can detect whether the pulse rate is less than the heart rate. And the comparison of heart sounds with a set threshold can determine whether the heart sounds can remain stable at a certain intensity. When the alarm module simultaneously receives the first, second, and third alarm signals, it can determine that postoperative atrial fibrillation has occurred and issue an alarm to alert medical staff.

[0054] In one specific embodiment, it also includes a power supply module that supplies power to the detection module, main control module, storage module, display module, alarm module, and input / output module.

[0055] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A postoperative atrial fibrillation monitoring and alarm system, characterized in that, include: The main control module, and the detection module, storage module, display module, input / output module and alarm module connected to the main control module; The detection module detects the electrocardiogram signal, pulse voltage signal, and heart sound signal of the patient after cardiac surgery and sends them to the main control module; The main control module samples the received electrocardiogram signal, pulse voltage signal, and heart sound signal and stores them in the storage module; according to the instructions of the input / output module, it selects the sampled signal and displays it through the display module; according to the instructions of the input / output module, it selects the stored signal from the storage module and displays it through the display module. The main control module is equipped with a threshold comparison unit. It obtains a heart rate signal from the electrocardiogram signal and a pulse signal from the pulse voltage signal. It compares the difference between the maximum and minimum values ​​of the heart rate signal with a first threshold; if the difference is greater, it sends a first alarm signal to the alarm module. It then compares the difference between the heart rate signal and the pulse signal with a second threshold; if the difference is greater, it sends a second alarm signal to the alarm module. Finally, it compares the heart sound signal with a third threshold; if the difference is less than a third alarm signal, it sends a third alarm signal to the alarm module. The alarm module issues an alarm prompt based on the received alarm signal.

2. The postoperative atrial fibrillation monitoring and alarm system according to claim 1, characterized in that, The detection module includes an electrocardiogram (ECG) detection unit, a pulse rate detection unit, and a heart sound detection unit, which respectively acquire the ECG signal, the pulse voltage signal, and the heart sound signal; each unit of the detection module is connected to the corresponding signal input port of the main control module via a signal line.

3. The postoperative atrial fibrillation monitoring and alarm system according to claim 2, characterized in that, The electrocardiogram (ECG) detection unit includes an ECG electrode group, a first amplification circuit, a first filtering circuit, and a first output line connected in sequence. The ECG electrode group collects the original ECG signal of the patient after cardiac surgery. The first amplification circuit amplifies the signal collected by the ECG electrode group. The first filtering circuit filters the amplified signal to obtain the final output ECG signal, which is output by the first output line.

4. The postoperative atrial fibrillation monitoring and alarm system according to claim 2, characterized in that, The pulse rate detection unit includes a piezoelectric pulse sensor, a second amplification circuit, a second filtering circuit, and a second output line connected in sequence. The piezoelectric pulse sensor collects the original pulse voltage signal of the patient after cardiac surgery. The second amplification circuit amplifies the signal collected by the piezoelectric pulse sensor. The second filtering circuit filters the amplified signal to obtain the final output pulse voltage signal, which is output by the second output line.

5. The postoperative atrial fibrillation monitoring and alarm system according to claim 2, characterized in that, The heart sound detection unit includes a micro-sound sensor, a third amplification circuit, a third filtering circuit, and a third output line connected in sequence. The micro-sound sensor collects the original heart sound signal of the patient after cardiac surgery. The third amplification circuit amplifies the signal collected by the micro-sound sensor. The third filtering circuit filters the amplified signal to obtain the final output heart sound signal, which is output by the third output line.

6. The postoperative atrial fibrillation monitoring and alarm system according to claim 1, characterized in that, The main control module includes a signal input port, a sampling unit, a main control MCU, an I / O port, and a threshold comparison unit; The sampling unit samples the electrocardiogram signal, pulse voltage signal, and heart sound signal received by the signal input port, and transmits them to the main control MCU and the threshold comparison unit, respectively. The main control MCU communicates with the storage module, the display module, and the input / output module through the I / O port, and executes the instructions of the input / output module; the main control MCU transmits the digital sampling signal received from the sampling unit to the storage module for storage; The threshold comparison unit sends the heart rate signal and the pulse signal to the main control MCU. The main control MCU displays the real-time heart rate and real-time pulse rate on the display module according to the instructions of the input / output module. The threshold comparison unit sends the first alarm signal, the second alarm signal and the third alarm signal to the main control MCU, and sends them to the alarm module through the IO port.

7. The postoperative atrial fibrillation monitoring and alarm system according to claim 6, characterized in that, The sampling unit includes a first AD converter, a second AD converter, and a third AD converter, which respectively sample the electrocardiogram signal, the pulse voltage signal, and the heart sound signal.

8. The postoperative atrial fibrillation monitoring and alarm system according to claim 1, characterized in that, The threshold comparison unit includes a first counting unit, a second counting unit, a first comparison subunit, a second comparison subunit, and a third comparison subunit; The first counting unit counts the peaks of the electrocardiogram signal to obtain a heart rate signal within a set time period; the second counting unit counts the peaks of the pulse voltage signal to obtain a pulse rate signal within a set time period. The first comparison subunit stores the maximum and minimum values ​​of the heart rate signal within a set time period, as well as the first threshold, in its first register, second register, and third register, respectively. The first comparison subunit compares the difference between the first register and the second register with the threshold stored in the third register. If the difference is greater than the threshold, the first alarm signal is issued. The fourth, fifth, and sixth registers of the second comparison subunit store the heart rate signal value, pulse rate signal value, and the second threshold for each time period, respectively; the second comparison subunit compares the difference between the fourth register and the fifth register with the threshold stored in the sixth register, and if the difference is greater than the threshold, it issues the second alarm signal; The seventh register of the third comparison subunit stores the heart sound value at each time moment, and the eighth register stores the third threshold. The third comparison subunit compares the seventh register with the eighth register, and if the value is less than the threshold, it issues the third alarm signal.

9. The postoperative atrial fibrillation monitoring and alarm system according to claim 1, characterized in that, It also includes a power supply module, which supplies power to the detection module, the main control module, the storage module, the display module, the alarm module and the input / output module.

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