Foot dorsal artery pulse monitoring method

Abstract

The invention relates to the technical field of dorsal foot artery monitoring, and particularly discloses a dorsal foot artery pulse monitoring method, which comprises the following steps: periodically monitoring a dorsal foot artery, dividing a monitoring period by unit time to obtain a plurality of monitoring time points, and marking the monitoring time points; acquiring a blood flow velocity value at each monitoring time point; calculating to obtain a blood flow pulsation index; comparing the blood flow pulsation index with a blood flow artery threshold value to obtain a pulsation stable signal or an early warning signal; based on the early warning signal, calculating to obtain an artery fluctuation resistance index; the arterial fluctuation resistance index is compared with the arterial fluctuation resistance index threshold value in combination with the early warning signal to obtain a risk signal, so that the problem that a single-direction consideration result is inaccurate is solved, the problem of delay caused by inaccurate evaluation in the dorsal foot artery monitoring and evaluation process is avoided, the dorsal foot artery monitoring accuracy is improved, and the risk of the dorsal foot artery is reduced. The body abnormity can be quickly and accurately judged and timely intervened, so that an effective reference basis is provided for monitoring the dorsal arteries of the feet.

Description

Technical Field

[0001] The present invention relates to the technical field of dorsalis pedis artery monitoring, and particularly relates to a method for monitoring dorsalis pedis artery pulsation. Background Art

[0002] As an invasive diagnostic and therapeutic operation in clinical practice, percutaneous transfemoral artery puncture intervention may lead to various postoperative complications at the puncture site if the handling of each link during the perioperative period is improper, such as bleeding, hematoma, pseudoaneurysm, arteriovenous fistula, thrombosis, embolism, vasovagal reflex, etc. at the puncture site.

[0003] By monitoring the change in blood flow velocity, if a decrease in blood flow rate is found, further evaluation and treatment of the blood flow condition of the lower extremities are required. For example, by monitoring the pulsation intensity of the dorsalis pedis artery of the patient, it is possible to determine whether there is arterial embolism or thrombosis. In addition, position management is a basic link in postoperative care. A reasonable position can promote venous return, reduce limb swelling, and improve blood circulation.

[0004] During the existing dorsalis pedis artery monitoring process, the blood flow velocity of the dorsalis pedis artery is usually directly monitored, and the disease is judged and the position is adjusted or intervened based on the blood flow velocity. There is a certain degree of inaccuracy. As the diagnostic basis for doctors, misjudgment is likely to occur, and it cannot play a direct and effective role in the recovery of patients. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for monitoring dorsalis pedis artery pulsation to solve the problems in the above background.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for monitoring dorsalis pedis artery pulsation includes the following steps:

[0008] Step 1: Periodically monitor the dorsalis pedis artery. Taking the unit time T as the monitoring period, taking the monitoring period T as the x-axis, and taking the blood flow velocity as the y-axis, construct a monitoring time-blood flow velocity coordinate system, and fit the blood flow velocity values of the dorsalis pedis artery within the monitoring period T into the monitoring time-blood flow velocity coordinate system;

[0009] Step 2: Divide the monitoring period T into several monitoring time points with the unit time t and mark them as n, where n is 1, 2, 3...; obtain the blood flow velocity values at each monitoring time point n, denoted as V n ; calculate the blood flow pulsation index PI;

[0010] Step 3: Compare the blood flow pulsation index PI with the blood flow artery threshold to obtain a pulsation stable signal or a warning signal;

[0011] Step 4: Based on the warning signal, calculate and obtain the arterial fluctuation resistance index RI;

[0012] Step 5: Combine the warning signal, compare the arterial fluctuation resistance index RI with the arterial fluctuation resistance index threshold, and obtain a risk signal.

[0013] As a further solution of the present invention: The calculation method of the blood flow pulsatility index PI is as follows:

[0014] Through Calculate and obtain the average blood flow velocity Vp;

[0015] Then, through Calculate and obtain the blood flow pulsatility index PI of the dorsalis pedis artery.

[0016] As a further solution of the present invention: The blood flow artery threshold includes a maximum blood flow pulsatility threshold and a minimum blood flow pulsatility threshold.

[0017] As a further solution of the present invention: If the blood flow pulsatility index PI is less than or equal to the maximum blood flow pulsatility threshold and greater than or equal to the minimum blood flow pulsatility threshold, a pulsation stable signal is generated;

[0018] Otherwise, a warning signal is generated.

[0019] As a further solution of the present invention: The warning signal includes an arterial vascular resistance warning signal and an arterial high-speed warning signal;

[0020] If the blood flow pulsatility index PI is less than the minimum blood flow pulsatility threshold, an arterial vascular resistance warning signal is generated;

[0021] If the blood flow pulsatility index PI is greater than the maximum blood flow pulsatility threshold, an arterial high-speed warning signal is generated. [[ID=^]]

[0022] As a further solution of the present invention: The calculation method of the arterial fluctuation resistance index RI is as follows:

[0023] Obtain the blood flow velocity stability threshold, including: the normal upper limit value of blood flow and the lower limit value of blood flow velocity;

[0024] Obtain the monitoring time points when the average blood flow velocity Vp is greater than the upper limit value of blood flow velocity, denoted as high-flow velocity time points, and marked as m, where m is 1, 2, 3...; Record the blood flow velocity value at each high-flow velocity time point m as V m ;

[0025] Obtain the minimum blood flow velocity Vmin within the monitoring period T;

[0026] Through Calculate and obtain the arterial fluctuation resistance value RI at the high-flow velocity time point m m ;

[0027] Then, through calculation, the arterial fluctuation resistance value Rj is obtained;

[0028] Finally, through calculation, the arterial fluctuation resistance index RI is obtained.

[0029] As a further solution of the present invention: the arterial fluctuation resistance index threshold includes a high arterial fluctuation resistance index threshold and a low arterial fluctuation resistance index threshold.

[0030] As a further solution of the present invention: the risk signals include high-risk signals, medium-risk signals, low-risk signals, and early warning risk signals.

[0031] As a further solution of the present invention: if the early warning signal is an arterial vessel resistance early warning signal and the arterial fluctuation resistance index RI is less than the low arterial fluctuation resistance index threshold, a high-risk signal is generated;

[0032] if the early warning signal is an arterial vessel resistance early warning signal and the arterial fluctuation resistance index RI is greater than the high arterial fluctuation resistance index threshold, a medium-risk signal is generated;

[0033] if the early warning signal is an arterial high-speed early warning signal and the arterial fluctuation resistance index RI is greater than the high arterial fluctuation resistance index threshold, a low-risk signal is generated;

[0034] if the early warning signal is an arterial high-speed early warning signal and the arterial fluctuation resistance index RI is less than the low arterial fluctuation resistance index threshold, an early warning risk signal is generated.

[0035] As a further solution of the present invention: a dorsal artery pulsation monitoring system includes:

[0036] A data acquisition module: periodically monitors the dorsal artery, uses the unit time T as the monitoring period, uses the monitoring period T as the x-axis, and uses the blood flow velocity as the y-axis to construct a monitoring time-blood flow velocity coordinate system, and fits the dorsal artery blood flow velocity values within the monitoring period T into the monitoring time-blood flow velocity coordinate system;

[0037] A data processing module: divides the monitoring period T into several monitoring time points with the unit time t and marks them as n, where n is 1, 2, 3...; obtains the blood flow velocity values at each monitoring time point n, denoted as V n ; calculates the blood flow pulsation index PI;

[0038] An early warning module: compares the blood flow pulsation index PI with the blood flow artery threshold to obtain a pulsation stable signal or an early warning signal;

[0039] An early warning processing module: based on the early warning signal, calculates the arterial fluctuation resistance index RI;

[0040] Risk warning module: Combining warning signals, comparing the arterial pulsation resistance index RI with the arterial pulsation resistance index threshold to obtain a risk signal.

[0041] Advantages of the present invention:

[0042] (1) In the present invention, by real-time monitoring and analyzing the blood flow velocity within a cycle, and considering the blood flow pulsation index PI and the arterial pulsation resistance index RI in combination, the problem of inaccurate results due to single-direction consideration is solved, avoiding the problem of delay caused by inaccurate evaluation during the dorsalis pedis artery monitoring and evaluation process, and improving the accuracy of dorsalis pedis artery monitoring;

[0043] (2) After monitoring and analyzing the blood flow velocity of the dorsalis pedis artery, based on the analysis results, corresponding risk warnings are generated, providing certain risk warnings for patients and doctors. At the same time, certain references can be given to patients based on the monitoring results, quickly and accurately judging physical abnormalities, and intervening in a timely manner, providing an effective reference basis for the monitoring of the dorsalis pedis artery. Description of the drawings

[0044] The present invention will be further described below in conjunction with the drawings.

[0045] Figure 1 is a schematic diagram of the method flow of the present invention;

[0046] Figure 2 is a block diagram of the monitoring system in the present invention. Detailed implementation manners

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0048] Embodiment 1

[0049] In invasive diagnostic and therapeutic operations such as percutaneous transfemoral coronary intervention (PCI), the occurrence of postoperative complications, especially those related to blood circulation disorders, is a key factor affecting the recovery and long-term health of patients. In order to effectively monitor and prevent these complications, a dorsalis pedis artery pulsation monitoring method, combined with comprehensive intervention measures such as body position management, early activity, ankle pump exercise, and limb massage, is used to meet the effects and accuracy of postoperative monitoring;

[0050] Please refer to Figure 1 As shown, the present invention is a dorsalis pedis artery pulsation monitoring method, including the following steps:

[0051] Step 1: Periodically monitor the dorsalis pedis artery. Taking the unit time T as the monitoring period, use Doppler ultrasound to monitor and obtain the blood flow velocity value of the dorsalis pedis artery in real time within the monitoring period T. Then, taking the monitoring period T as the x-axis and the blood flow velocity as the y-axis, construct a monitoring time-blood flow velocity coordinate system, and fit the blood flow velocity values of the dorsalis pedis artery within the monitoring period T into the monitoring time-blood flow velocity coordinate system;

[0052] After invasive diagnoses and treatments such as percutaneous transluminal coronary intervention (PCI), when dealing with basic body position management, generally, the affected limb of the patient is elevated by 20°-30° to promote the return of lower limb venous blood and reduce congestion; the puncture side limb is immobilized for 6 to 12 hours, and the patient is required to stay in bed absolutely for 24 hours with less flexion of the hip joint. When conditions permit, getting out of bed activities, ankle pump exercises, and limb massages are also required to ensure the normal circulation of blood flow in blood vessels and ensure rapid recovery after the operation. At this time, it is necessary to monitor the blood vessels of the dorsalis pedis artery. The monitoring period T can be 15 minutes, 30 minutes, etc.; Dorsalis pedis artery pulsation: once every 30 minutes to 6 hours; once every 60 minutes to 24 hours;

[0053] Step 2: Divide the monitoring period T into several monitoring time points with the unit time t and label them as n, where n is 1, 2, 3...; Obtain the blood flow velocity value at each monitoring time point n, denoted as V n ; Calculate the blood flow pulsatility index PI;

[0054] Specifically, the calculation method of the blood flow pulsatility index PI is as follows:

[0055] Through Calculate the average blood flow velocity Vp;

[0056] Then, through Calculate the blood flow pulsatility index PI of the dorsalis pedis artery; Calculating the blood flow pulsatility index PI can be used to determine whether the blood flow velocity and pulsation resistance are stable within the monitoring period T;

[0057] Step 3: Compare the blood flow pulsatility index PI with the blood flow artery threshold, where the blood flow artery threshold includes the maximum blood flow pulsation threshold and the minimum blood flow pulsation threshold;

[0058] If the blood flow pulsatility index PI is less than or equal to the maximum blood flow pulsation threshold and greater than or equal to the minimum blood flow pulsation threshold, generate a pulsation stable signal;

[0059] Otherwise, generate warning signals, including arterial vascular resistance warning signals and arterial high-speed warning signals;

[0060] If the blood flow pulsatility index PI is less than the minimum blood flow pulsation threshold, generate an arterial vascular resistance warning signal;

[0061] If the blood flow pulsation index PI is greater than the maximum blood flow pulsation threshold, an arterial high-speed warning signal is generated;

[0062] Step Four: Based on the warning signal, calculate the arterial fluctuation resistance index RI;

[0063] Specifically, the calculation method of the arterial fluctuation resistance index RI is as follows:

[0064] Obtain the blood flow velocity stability threshold, including: the normal upper limit value of blood flow and the lower limit value of blood flow velocity;

[0065] Obtain the monitoring time points when the average blood flow velocity Vp is greater than the upper limit value of blood flow velocity, denoted as high-flow time points, and marked as m, where m is 1, 2, 3...; Denote the blood flow velocity value at each high-flow time point m as V m ;

[0066] Obtain the minimum blood flow velocity Vmin within the monitoring period T;

[0067] Through Calculate the arterial fluctuation resistance value RI at the high-flow time point m m ;

[0068] Then through Calculate the arterial fluctuation resistance value Rj;

[0069] Finally, through Calculate the arterial fluctuation resistance index RI;

[0070] Step Five: Combine the warning signal and compare the arterial fluctuation resistance index RI with the arterial fluctuation resistance index threshold. Among them, the arterial fluctuation resistance index threshold includes the high arterial fluctuation resistance index threshold and the low arterial fluctuation resistance index threshold, and obtain a risk signal. The risk signal includes a high-risk signal, a medium-risk signal, a low-risk signal, and a warning risk signal;

[0071] If the warning signal is an arterial vascular resistance warning signal and the arterial fluctuation resistance index RI is less than the low arterial fluctuation resistance index threshold, a high-risk signal is generated; at this time, it indicates that there may be an abnormal channel between the dorsal artery of the foot and the vein; under this risk signal, the monitor needs to conduct an examination and treatment in a timely manner, and at the same time detect whether there is abnormal limb temperature in the dorsal foot and lower limbs;

[0072] If the warning signal is the arterial vascular resistance warning signal and the arterial fluctuation resistance index RI is greater than the high threshold of the arterial fluctuation resistance index, a medium-risk signal is generated. At this time, it indicates that the dorsal artery of the foot may be stenotic. Generally, the patient's foot will show coldness, numbness, pallor, or weakened dorsal artery pulsation. In severe cases, arterial embolism may occur. Arterial embolism is mainly manifested as pale skin color, cool skin temperature, pain, numbness, and sensory abnormalities in the lower extremities. Severe patients may even have a risk of lower extremity necrosis and even amputation in a short time. Venous embolism is mainly manifested as some swelling, weakness, red skin color, and increased skin temperature in the lower extremities. At this time, timely intervention and examination are required;

[0073] If the warning signal is the arterial high-speed warning signal and the arterial fluctuation resistance index RI is greater than the high threshold of the arterial fluctuation resistance index, a low-risk signal is generated. At this time, it indicates that the blood flow in the dorsal artery of the foot is accelerating, and there may be local stenosis or arteriosclerosis in the front-end blood vessels, and further examinations can be carried out;

[0074] If the warning signal is the arterial high-speed warning signal and the arterial fluctuation resistance index RI is less than the low threshold of the arterial fluctuation resistance index, a warning risk signal is generated. At this time, it indicates that the dorsal artery pulsation of the foot is enhanced, the local temperature is increased, and there may be a problem of pseudoaneurysm, that is, a pulsating mass;

[0075] In the process of monitoring and evaluating the dorsal artery of the foot, if only the blood flow pulsation index is considered, the abnormal fluctuations of the blood flow velocity within the monitoring period are ignored. If only the arterial fluctuation resistance index RI is considered, the overall high or low condition of the arterial blood flow velocity is ignored. This monitoring method monitors the blood flow velocity in real time within the cycle, analyzes and calculates, and combines the blood flow pulsation index PI and the arterial fluctuation resistance index RI, solving the problem of inaccurate results in a single direction of consideration, avoiding the problem of inaccurate evaluation and delay in the process of monitoring and evaluating the dorsal artery of the foot, and improving the accuracy of dorsal artery of the foot monitoring;

[0076] In addition, after monitoring and analyzing the blood flow velocity of the dorsal artery of the foot, based on the analysis results, corresponding risk warnings are generated, providing certain risk warnings for patients and doctors. At the same time, certain references can be given to patients based on the monitoring results, quickly and accurately judging physical abnormalities, and intervening in a timely manner, providing an effective reference basis for the monitoring of the dorsal artery of the foot.

[0077] Embodiment 2

[0078] Referring to Figure 2 As shown, based on the above embodiment, this embodiment provides a dorsal artery of the foot pulsation monitoring system, including:

[0079] Data acquisition module: Periodically monitor the dorsalis pedis artery. Taking the unit time T as the monitoring period, using the monitoring period T as the x-axis and the blood flow velocity as the y-axis, construct a monitoring time-blood flow velocity coordinate system, and fit the blood flow velocity values of the dorsalis pedis artery within the monitoring period T into the monitoring time-blood flow velocity coordinate system;

[0080] Data processing module: Divide the monitoring period T into several monitoring time points with unit time t and label them as n, where n is 1, 2, 3...; Obtain the blood flow velocity value at each monitoring time point n, denoted as V n ; Calculate the blood flow pulsatility index PI;

[0081] Warning module: Compare the blood flow pulsatility index PI with the blood flow artery threshold to obtain a pulsation stability signal or a warning signal;

[0082] Warning processing module: Based on the warning signal, calculate the artery fluctuation resistance index RI;

[0083] Risk reminder module: Combine the warning signal and compare the artery fluctuation resistance index RI with the artery fluctuation resistance index threshold to obtain a risk signal.

[0084] Those of ordinary skill in the art can realize that, combining the units and algorithm steps of each example described in the embodiments disclosed herein, can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but this implementation should not be considered to exceed the scope of this application.

[0085] The above formulas are all dimensionless and take their numerical calculations. The formulas are obtained by collecting a large amount of data for software simulation to obtain a formula that is closest to the actual situation. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0086] The above has described a detailed description of an embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A dorsalis pedis artery pulsation monitoring method, characterized in that It includes the following steps: Step 1: Periodically monitor the dorsalis pedis artery. Taking the unit time T as the monitoring period, using the monitoring period T as the x-axis and the blood flow velocity as the y-axis, construct a monitoring time-blood flow velocity coordinate system, and fit the dorsalis pedis artery blood flow velocity values within the monitoring period T into the monitoring time-blood flow velocity coordinate system; Step 2: Divide the monitoring period T into several monitoring time points with unit time t and label them as n, where n is 1, 2, 3...; Obtain the blood flow velocity value at each monitoring time point n, denoted as V n ; Calculate the blood flow pulsatility index PI; Step 3: Compare the blood flow pulsatility index PI with the blood flow artery threshold to obtain a pulsation stable signal or a warning signal; Step 4: Based on the warning signal, calculate and obtain the arterial fluctuation resistance index RI; Step 5: Combine the warning signal and compare the arterial fluctuation resistance index RI with the arterial fluctuation resistance index threshold to obtain a risk signal.

2. The dorsal artery of foot pulsation monitoring method according to claim 1, wherein The calculation method of the blood flow pulsatility index PI is: By calculating, the mean blood flow velocity Vp is obtained; Then, through calculate the blood flow pulsatility index PI of the dorsalis pedis artery.

3. The method for monitoring dorsalis pedis artery pulsation according to claim 1, characterized in that The blood flow artery threshold includes a maximum blood flow pulsation threshold and a minimum blood flow pulsation threshold.

4. The method for monitoring dorsalis pedis artery pulsation according to claim 3, wherein If the blood flow pulsatility index PI is less than or equal to the maximum blood flow pulsation threshold and greater than or equal to the minimum blood flow pulsation threshold, a pulsation stable signal is generated; Otherwise, a warning signal is generated.

5. A dorsalis pedis artery pulsation monitoring method according to claim 4, characterized in that The warning signal includes an arterial vascular resistance warning signal and an arterial high-speed warning signal; If the blood flow pulsatility index PI is less than the minimum blood flow pulsation threshold, an arterial vascular resistance warning signal is generated; If the blood flow pulsatility index PI is greater than the maximum blood flow pulsation threshold, an arterial high-speed warning signal is generated.

6. The method for monitoring dorsalis pedis artery pulsation according to claim 1, wherein The calculation method of the arterial fluctuation resistance index RI is: Obtain the blood flow velocity stability threshold, including: the upper limit value of normal blood flow and the lower limit value of blood flow velocity; Obtain the monitoring time points where the mean blood flow velocity Vp is greater than the upper limit of the blood flow velocity, denoted as high flow velocity time points, and marked as m, where m is 1, 2, 3...; Denote the blood flow velocity value at each high flow velocity time point m as V m ; Obtain the minimum blood flow velocity Vmin within the monitoring period T; By calculating, the arterial pulsation resistance value RI at the high flow rate time point m is obtained m ; Then, through calculate to obtain the arterial fluctuation resistance value Rj; Finally, by calculating, the arterial fluctuation resistance index RI is obtained.

7. A dorsalis pedis artery pulsation monitoring method according to claim 1, characterized in that The arterial fluctuation resistance index threshold includes a high arterial fluctuation resistance index threshold and a low arterial fluctuation resistance index threshold.

8. A dorsalis pedis artery pulsation monitoring method according to claim 1, characterized in that The risk signal includes a high-risk signal, a medium-risk signal, a low-risk signal, and a warning risk signal.

9. The dorsalis pedis artery pulsation monitoring method according to claim 1, wherein If the warning signal is an arterial vascular resistance warning signal and the arterial fluctuation resistance index RI is less than the low arterial fluctuation resistance index threshold, a high-risk signal is generated; If the warning signal is an arterial vascular resistance warning signal and the arterial fluctuation resistance index RI is greater than the high arterial fluctuation resistance index threshold, a medium-risk signal is generated; If the warning signal is an arterial high-speed warning signal and the arterial fluctuation resistance index RI is greater than the high arterial fluctuation resistance index threshold, a low-risk signal is generated; If the warning signal is an arterial high-speed warning signal and the arterial fluctuation resistance index RI is less than the low arterial fluctuation resistance index threshold, a warning risk signal is generated.

10. A dorsalis pedis artery pulsation monitoring system, characterized in that, This system is used to execute the dorsalis pedis artery pulsation monitoring method described in any one of the above claims 1-9, and includes: Data acquisition module: Periodically monitor the dorsalis pedis artery. Taking the unit time T as the monitoring period, using the monitoring period T as the x-axis and the blood flow velocity as the y-axis, construct a monitoring time-blood flow velocity coordinate system, and fit the dorsalis pedis artery blood flow velocity values within the monitoring period T into the monitoring time-blood flow velocity coordinate system; Data processing module: Divide the monitoring period T into several monitoring time points with unit time t and label them as n, where n is 1, 2, 3...; Obtain the blood flow velocity value at each monitoring time point n, denoted as V n ; Calculate the blood flow pulsatility index PI; Warning module: Compare the blood flow pulsatility index PI with the blood flow artery threshold to obtain a pulsation stable signal or a warning signal; Warning processing module: Based on the warning signal, calculate and obtain the arterial fluctuation resistance index RI; Risk warning module: Combining warning signals, comparing the arterial fluctuation resistance index RI with the arterial fluctuation resistance index threshold value to obtain a risk signal.

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