Internal fistula blood vessel detection system for hemodialysis

Abstract

The invention relates to the technical field of medical instruments, in particular to an internal fistula blood vessel detection system for hemodialysis, which comprises a data acquisition module for acquiring ultrasonic data, an impedance value, tremor intensity and a pressure spectrum; the mode determining module is used for determining a detection mode of the internal fistula blood vessel based on the tortuosity index and determining massage frequency and air bag pressure according to the blood vessel compliance index; the stenosis analysis module is used for determining whether the internal fistula blood vessel is stenosis or not based on the stenosis risk characterization parameter and determining whether the stenosis degree of the internal fistula blood vessel is in a reasonable range or not according to the blood flow velocity characterization value; the frequency adjusting module determines and adjusts the massage frequency based on the ratio; the injury analysis module is used for determining whether the internal fistula blood vessel is injured or not in the dialysis process on the basis of the bioelectrical impedance change rate and determining whether the internal fistula blood vessel injury is in a reasonable range or not after dialysis according to the tremor intensity change value; the pressure adjusting module determines and adjusts the pressure of the air bag based on the difference value. The accuracy of internal fistula blood vessel detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an internal fistula blood vessel detection system for hemodialysis. Background Art

[0002] Hemodialysis is a common treatment method for patients with renal failure such as end-stage renal disease, and the internal fistula blood vessel is an important blood vessel access for hemodialysis patients. However, various problems are likely to occur during the use of the internal fistula blood vessel. Narrowing of the internal fistula blood vessel may lead to poor blood flow, increasing the risk of thrombosis, and further making dialysis unable to be effectively carried out; while blood vessel injury may affect the structural and functional integrity of the blood vessel. Currently, the clinical detection methods for internal fistula blood vessels mainly include auscultation method, but this method is too dependent on the doctor's experience, with strong subjectivity, and it is often difficult to detect early stenosis or mild injury, prone to missed diagnosis. Ultrasonic examination, its results are greatly affected by the technical level and experience of the operator, and it is difficult to make an accurate diagnosis for some subtle stenosis or injury characteristics. Angiography, which belongs to invasive examination, will bring certain pain and risks to patients, and the examination cost is relatively high. Therefore, a system that can monitor the status of the internal fistula blood vessel in real time, comprehensively and accurately is needed to timely detect stenosis and injury problems and improve the accuracy of internal fistula blood vessel detection.

[0003] Chinese Patent Application Publication No.: CN119075053A discloses an arteriovenous internal fistula thrombus detection and early warning processing device, specifically an arteriovenous internal fistula thrombus detection and early warning processing device. In the above arteriovenous internal fistula thrombus detection and early warning processing device, first, the upper limb on the internal fistula side is heated by the infrared temperature measurement and heating mechanism to prevent thrombus formation, and the current heating temperature is adjusted according to the current body surface temperature detected by the infrared temperature measurement and heating mechanism; secondly, the blood flow velocity information is collected by the blood information collection component, and it is judged whether the current blood flow velocity is lower than a preset threshold according to the blood flow velocity information. When it is lower than the preset threshold, an early warning signal is sent by the early warning component and a vibration is generated by the vibration and patting mechanism to pat the blood vessels of the upper limb on the internal fistula side for thrombus elimination; in addition, an adjustable combined fixing frame is provided to adapt to upper limbs of different thicknesses, and a columnar inflatable airbag and a flexible fixing belt are used in cooperation for fixing to avoid compression of the blood vessels of the upper limb on the internal fistula side by the device.

[0004] However, the following problems exist in the prior art: The infrared temperature measurement and heating mechanism and the vibration and patting mechanism are set to prevent thrombus formation, and the thrombus situation is judged by the blood flow velocity information. The detection means are relatively single, and the stenosis and injury conditions of the internal fistula blood vessel are not deeply processed, resulting in untimely detection of the internal fistula blood vessel, and thus the problem of low accuracy of internal fistula blood vessel detection. Summary of the Invention

[0005] To this end, the present invention provides a fistula blood vessel detection system for hemodialysis to overcome the problems in the prior art that an infrared temperature measurement and heating mechanism and a vibration flapping mechanism are set to prevent the formation of thrombus, and the thrombus condition is judged through blood flow velocity information. The detection means is relatively single, and the stenosis and damage conditions of the fistula blood vessels are not deeply processed, resulting in untimely detection of the fistula blood vessels and thus low accuracy of the detection of the fistula blood vessels.

[0006] To achieve the above object, the present invention provides a fistula blood vessel detection system for hemodialysis, including: A data acquisition module, which is used to acquire the ultrasonic data of the ultrasonic patch array, the impedance value of the electrode sensor, and the tremor intensity and pressure spectrum of the pressure sensor; A mode determination module, which is connected to the data acquisition module and is used to determine the detection mode of the fistula blood vessel based on the tortuosity index of the fistula blood vessel before dialysis, and determine the massage frequency and balloon pressure of the corresponding detection mode according to the vascular compliance index of the fistula blood vessel; A stenosis analysis module, which is respectively connected to the data acquisition module and the mode determination module, and is used to determine whether the fistula blood vessel has stenosis based on the stenosis risk characterization parameter of the corresponding detection mode, and determine whether the stenosis degree of the fistula blood vessel is within a reasonable range according to the blood flow velocity characterization value of the fistula blood vessel; A frequency adjustment module, which is connected to the stenosis analysis module and is used to determine the adjustment of the massage frequency of the corresponding detection mode based on the ratio of the preset blood flow velocity characterization value to the blood flow velocity characterization value; An injury analysis module, which is respectively connected to the data acquisition module and the frequency adjustment module, and is used to determine whether the fistula blood vessel is damaged during dialysis based on the bioelectrical impedance change rate of the fistula blood vessel after dialysis, and determine whether the damage of the fistula blood vessel after dialysis is within a reasonable range according to the tremor intensity change value of the fistula blood vessel after dialysis; A pressure adjustment module, which is connected to the injury detection module and is used to determine the adjustment of the balloon pressure of the corresponding detection mode based on the difference between the tremor intensity change value and the preset tremor intensity change value.

[0007] Further, the mode determination module determines the detection mode of the fistula blood vessel based on the comparison result between the tortuosity index of the fistula blood vessel before dialysis and the tortuosity index threshold, wherein, Based on the comparison result that the tortuosity index of the fistula blood vessel before dialysis is less than or equal to the tortuosity index threshold, it is determined that the detection mode of the fistula blood vessel is the first detection mode, and the first detection mode is a straight blood vessel detection mode for detecting a fistula blood vessel with a straight blood vessel morphology; Based on the comparison result that the tortuosity index of the internal fistula blood vessel before dialysis is greater than the tortuosity index threshold, it is determined that the detection mode of the internal fistula blood vessel is the second detection mode, and the second detection mode is a curved blood vessel detection mode for detecting the tortuous internal fistula blood vessel with a tortuous blood vessel morphology.

[0008] Further, the mode determination module determines the massage frequency and the balloon pressure based on the comparison result between the blood vessel compliance index of the internal fistula blood vessel before dialysis and the preset blood vessel compliance index, where Based on the comparison result that the blood vessel compliance index of the internal fistula blood vessel before dialysis is less than or equal to the preset blood vessel compliance index, the first massage frequency and the first balloon pressure of the corresponding detection mode are determined; Based on the comparison result that the blood vessel compliance index of the internal fistula blood vessel before dialysis is greater than the preset blood vessel compliance index, the second massage frequency and the second balloon pressure of the corresponding detection mode are determined.

[0009] Further, the stenosis analysis module determines that the internal fistula blood vessel has stenosis based on the comparison result that the stenosis risk characterization parameter of the internal fistula blood vessel before dialysis in the corresponding detection mode is greater than the preset stenosis risk characterization parameter.

[0010] Further, the stenosis analysis module determines that the stenosis degree of the internal fistula blood vessel is not within a reasonable range based on the comparison result that the blood flow velocity characterization value of the internal fistula blood vessel before dialysis is greater than the preset blood flow velocity characterization value.

[0011] Further, the frequency adjustment module determines to increase the massage frequency with a first preset frequency adjustment coefficient based on the comparison that the ratio of the preset blood flow velocity characterization value to the blood flow velocity characterization value is less than or equal to the preset ratio.

[0012] Further, the frequency adjustment module determines to increase the massage frequency with a second preset frequency adjustment coefficient based on the comparison that the ratio of the preset blood flow velocity characterization value to the blood flow velocity characterization value is greater than the preset ratio.

[0013] Further, the damage analysis module determines that the internal fistula blood vessel is damaged during dialysis based on the comparison result that the bioelectrical impedance change rate of the internal fistula blood vessel after dialysis is greater than the preset bioelectrical impedance change rate, and determines that the damage of the internal fistula blood vessel after dialysis is within a reasonable range based on the comparison result that the change value of the thrill intensity of the internal fistula blood vessel after dialysis is less than or equal to the preset thrill intensity change value.

[0014] Further, the pressure adjustment module determines to decrease the balloon pressure with a first preset pressure adjustment coefficient based on the comparison result that the difference between the thrill intensity change value and the preset thrill intensity change value is less than or equal to the preset difference.

[0015] Further, the pressure adjustment module determines to reduce the airbag pressure with a second preset pressure adjustment coefficient based on the comparison result that the difference between the tremor intensity change value and the preset tremor intensity change value is greater than the preset difference.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows. The present invention realizes the comprehensive monitoring of the internal fistula blood vessel during dialysis through the collaborative work of multiple modules. The data acquisition module collects multi-modal data such as the ultrasonic morphology, bioelectrical impedance, and pressure tremor of the internal fistula blood vessel. The mode determination module sets the initial detection mode and initial parameters according to the tortuosity index and the vascular compliance index. The stenosis analysis module evaluates the stenosis state by combining the stenosis risk characterization parameter and the blood flow velocity characterization value. The frequency adjustment module dynamically adjusts the massage frequency. After dialysis, the injury analysis module uses the bioelectrical impedance change rate and the tremor intensity change value to judge the blood vessel injury condition. The pressure adjustment module adjusts the airbag pressure according to the injury degree, improving the monitoring efficiency of the internal fistula blood vessel state, promptly discovering stenosis and injury problems and making precise adjustments, improving the dialysis safety, increasing the stenosis detection sensitivity, and thus improving the accuracy of the internal fistula blood vessel detection.

[0017] Further, the present invention selects a suitable detection mode through the mode determination module according to the tortuosity index of the internal fistula blood vessel before dialysis, and determines the initial massage frequency and airbag pressure in combination with the vascular compliance index, realizing the precise detection and personalized treatment of internal fistula blood vessels with different morphologies and compliances, improving the detection accuracy and adaptability, and reducing the risk of mechanical stress injury.

[0018] Further, the present invention determines whether there is stenosis in the internal fistula blood vessel through the stenosis analysis module according to the stenosis risk characterization parameter in the current detection mode, and determines whether the stenosis degree is reasonable according to the blood flow velocity characterization value when there is stenosis, realizing the precise detection of the stenosis condition and its severity of the internal fistula blood vessel, improving the efficiency of promptly discovering and dealing with blood vessel stenosis problems, improving the dialysis quality, reducing the thrombosis risk, and enhancing the detection efficiency.

[0019] Further, the present invention dynamically adjusts the massage frequency through the frequency adjustment module according to the ratio of the preset blood flow velocity characterization value to the actual blood flow velocity characterization value, strengthening the protection of blood vessels during hemodialysis, enhancing the blood vessel dilation efficiency, reducing the restenosis incidence rate. Through reasonable adjustment of the massage frequency, it can promptly respond to blood vessel stenosis problems and prevent unnecessary stimulation or injury to blood vessels caused by excessive adjustment amplitude.

[0020] Further, during the dialysis process after adjusting the massage frequency, the present invention determines whether the internal fistula blood vessel is damaged by comparing the bioelectrical impedance change rate with the preset bioelectrical impedance change rate through the damage analysis module, and also uses the tremor intensity change value to evaluate whether the damage range of the damaged blood vessel is reasonable. Combining the bioelectrical impedance and the tremor intensity change, a more comprehensive and accurate monitoring means for the internal fistula blood vessel damage is provided, which helps to detect potential damage in a timely manner and effectively improves the dialysis quality.

[0021] Further, when the damage of the internal fistula blood vessel is within a reasonable range after dialysis, the present invention adjusts the airbag pressure according to the tremor intensity change value through the pressure adjustment module, reduces unnecessary pressure stimulation, promotes the recovery of blood vessel function, reasonably adjusts the airbag pressure, effectively avoids blood vessel damage caused by too high or too low pressure, and maintains the stability of the blood vessel tremor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the module connection of the internal fistula blood vessel detection system for hemodialysis according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the hemodialysis internal fistula blood vessel detector applied to the internal fistula blood vessel detection system according to an embodiment of the present invention; Figure 3 It is a flowchart for determining whether there is stenosis in the internal fistula blood vessel according to an embodiment of the present invention; Figure 4 It is a flowchart for determining whether the internal fistula blood vessel is damaged during dialysis according to an embodiment of the present invention; In the figure, 1, detection sleeve; 201, ultrasonic patch array; 202, electrode sensor; 203, pressure sensor; 3, display screen; 401, airbag; 402, massage component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0025] It should be noted that the data in this embodiment are all obtained through comprehensive analysis and evaluation of the historical detection data and corresponding historical detection results of the present invention in the three months before this detection. Those skilled in the art can understand that the determination method of the above single parameter of the present invention can be to select the value with the highest proportion according to the data distribution as the preset standard parameter, use weighted summation to take the obtained value as the preset standard parameter, substitute each historical data into a specific formula and take the value obtained by using this formula as the preset standard parameter or other selection methods, as long as it meets the requirement that the present invention can clearly define different specific situations in the single determination process through the obtained values.

[0026] Please refer to Figure 1 as shown, which is a schematic diagram of the module connection of the internal fistula blood vessel detection system for hemodialysis according to an embodiment of the present invention.

[0027] An embodiment of the present invention provides an internal fistula blood vessel detection system for hemodialysis, including: A data acquisition module, which is used to acquire the ultrasonic data of the ultrasonic patch array, the impedance value of the electrode sensor, and the tremor intensity and pressure spectrum of the pressure sensor; A mode determination module, which is connected to the data acquisition module, and is used to determine the detection mode of the internal fistula blood vessel based on the tortuosity index of the internal fistula blood vessel before dialysis, and determine the massage frequency and balloon pressure of the corresponding detection mode according to the vascular compliance index of the internal fistula blood vessel; A stenosis analysis module, which is respectively connected to the data acquisition module and the mode determination module, and is used to determine whether the internal fistula blood vessel has stenosis based on the stenosis risk characterization parameter of the corresponding detection mode, and determine whether the stenosis degree of the internal fistula blood vessel is within a reasonable range according to the blood flow velocity characterization value of the internal fistula blood vessel; A frequency adjustment module, which is connected to the stenosis analysis module, and is used to determine the adjustment of the massage frequency of the corresponding detection mode based on the ratio of the preset blood flow velocity characterization value to the blood flow velocity characterization value; An injury analysis module, which is respectively connected to the data acquisition module and the frequency adjustment module, and is used to determine whether the internal fistula blood vessel is damaged during dialysis based on the bioelectrical impedance change rate of the internal fistula blood vessel after dialysis, and determine whether the injury of the internal fistula blood vessel after dialysis is within a reasonable range according to the change value of the tremor intensity of the internal fistula blood vessel after dialysis; A pressure adjustment module, which is connected to the injury detection module, and is used to determine the adjustment of the balloon pressure of the corresponding detection mode based on the difference between the tremor intensity change value and the preset tremor intensity change value.

[0028] Please refer to Figure 2 as shown, which is a schematic diagram of the structure of a hemodialysis internal fistula blood vessel detector applied to the internal fistula blood vessel detection system according to an embodiment of the present invention.

[0029] An embodiment of the present invention provides a hemodialysis internal fistula blood vessel detector applied to an internal fistula blood vessel detection system, including: A detection sleeve 1, A detection mechanism, which includes an ultrasonic patch array 201 arranged on the inner surface of the detection sleeve for collecting ultrasonic data of the internal fistula blood vessel, an electrode sensor 202 arranged near the ultrasonic patch array 201 for collecting the impedance value of the internal fistula blood vessel, and a pressure sensor 203 arranged near the electrode sensor 202 for collecting the tremor intensity and pressure spectrum of the internal fistula blood vessel; A display screen 3, which is arranged on the outer surface of the detection sleeve 1 for displaying internal fistula blood vessel detection information; An auxiliary mechanism, which includes an airbag 401 arranged on the inner side of the detection sleeve 1 for applying pressure to the internal fistula blood vessel, and a massage component 402 arranged near the airbag 401 for stimulating the internal fistula blood vessel.

[0030] Specifically, the present invention realizes the comprehensive monitoring of the internal fistula blood vessel during dialysis through the collaborative work of multiple modules. The data acquisition module collects multi-modal data such as the ultrasonic morphology, bioelectrical impedance, and pressure tremor of the internal fistula blood vessel. The mode determination module sets the initial detection mode and initial parameters according to the tortuosity index and vascular compliance index. The stenosis analysis module evaluates the stenosis state by combining the stenosis risk characterization parameter and the blood flow velocity characterization value. The frequency adjustment module dynamically adjusts the massage frequency. After dialysis, the injury analysis module uses the bioelectrical impedance change rate and the tremor intensity change value to judge the blood vessel injury situation. The pressure adjustment module adjusts the airbag pressure according to the injury degree, improving the monitoring efficiency of the internal fistula blood vessel state, timely discovering stenosis and injury problems and making precise adjustments, improving the dialysis safety, improving the stenosis detection sensitivity, and thus improving the accuracy of the internal fistula blood vessel detection.

[0031] Specifically, the mode determination module determines the detection mode of the internal fistula blood vessel according to the comparison result between the tortuosity index of the internal fistula blood vessel before dialysis and the tortuosity index threshold; If the tortuosity index is less than or equal to the tortuosity index threshold, it is determined that the detection mode of the internal fistula blood vessel is the first detection mode; If the tortuosity index is greater than the tortuosity index threshold, it is determined that the detection mode of the internal fistula blood vessel is the second detection mode.

[0032] In the embodiment of the present invention, the value of the tortuosity index threshold is 0.6, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0033] In the embodiment of the present invention, the first detection mode is a straight blood vessel detection mode, which is applicable to the arteriovenous fistula blood vessels with relatively straight blood vessel morphology. The second detection mode is a curved blood vessel detection mode, which is applicable to the arteriovenous fistula blood vessels with significantly tortuous blood vessel morphology.

[0034] During the implementation process, the tortuosity index is the ratio of the actual length of the center line of the arteriovenous fistula blood vessel to the straight-line distance between the starting and ending points of the arteriovenous fistula blood vessel. The actual length of the center line and the straight-line distance between the starting and ending points are determined from the blood vessel B-mode image obtained by the ultrasonic patch array.

[0035] Specifically, under the condition of determining the detection mode of the arteriovenous fistula blood vessel, the mode determination module determines the initial massage frequency and the initial airbag pressure of the corresponding detection mode according to the comparison result between the blood vessel compliance index and the preset blood vessel compliance index; If the blood vessel compliance index is less than or equal to the preset blood vessel compliance index, the first massage frequency and the first airbag pressure are determined; If the blood vessel compliance index is greater than the preset blood vessel compliance index, the second massage frequency and the second airbag pressure are determined.

[0036] In the embodiment of the present invention, the preset blood vessel compliance index takes a value of 0.02 mmHg -1 , but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0037] In the embodiment of the present invention, the first massage frequency is 18 Hz to 22 Hz, preferably 20 Hz, the first airbag pressure is 23 mmHg to 27 mmHg, preferably 25 mmHg, the second massage frequency is 28 Hz to 32 Hz, preferably 30 Hz, and the second airbag pressure is 35 mmHg to 39 mmHg, preferably 37 mmHg.

[0038] During the implementation process, the blood vessel compliance index is the result of dividing the ratio of the blood vessel volume change amount to the initial blood vessel volume by the difference between the systolic pressure and the diastolic pressure in the pressure spectrum. The blood vessel volume change amount and the initial blood vessel volume are determined from the B-mode image of the ultrasonic patch array, and the difference between the systolic pressure and the diastolic pressure is determined from the pressure spectrum collected by the pressure sensor, and the peak pressure difference within at least one cardiac cycle is taken.

[0039] Specifically, the present invention selects a suitable detection mode according to the tortuosity index of the arteriovenous fistula blood vessel before dialysis through the mode determination module, and determines the initial massage frequency and the airbag pressure in combination with the blood vessel compliance index, realizing precise detection and personalized treatment of arteriovenous fistula blood vessels with different morphologies and compliances, improving the accuracy and adaptability of detection, and reducing the risk of mechanical stress damage.

[0040] Please refer to Figure 3 as shown, which is a flowchart for determining whether there is stenosis in the arteriovenous fistula blood vessel according to an embodiment of the present invention.

[0041] Specifically, under the condition of determining the detection mode of the arteriovenous fistula blood vessel, the stenosis analysis module determines whether there is stenosis in the arteriovenous fistula blood vessel according to the comparison result between the stenosis risk characterization parameter of the corresponding detection mode and the preset stenosis risk characterization parameter; If the stenosis risk characterization parameter is less than or equal to the preset stenosis risk characterization parameter, it is determined that there is no stenosis in the arteriovenous fistula blood vessel; If the stenosis risk characterization parameter is greater than the preset stenosis risk characterization parameter, it is determined that there is stenosis in the arteriovenous fistula blood vessel.

[0042] In an embodiment of the present invention, the value of the preset stenosis risk characterization parameter is 0.3, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0043] In the implementation process, the stenosis risk characterization parameter is the ratio of the standard deviation of the diameters of several sampling segments of the center line of the arteriovenous fistula blood vessel to the average value of the diameters of several sampling segments of the center line of the arteriovenous fistula blood vessel, and the center line of the arteriovenous fistula blood vessel is determined by the B-mode image obtained by the ultrasonic patch array.

[0044] Specifically, when the stenosis analysis module determines that there is stenosis in the arteriovenous fistula blood vessel, it determines whether the stenosis degree of the arteriovenous fistula blood vessel is within a reasonable range according to the comparison result between the blood flow velocity characterization value and the preset blood flow velocity characterization value; If the blood flow velocity characterization value is less than or equal to the preset blood flow velocity characterization value, it is determined that the stenosis degree of the arteriovenous fistula blood vessel is within a reasonable range; If the blood flow velocity characterization value is greater than the preset blood flow velocity characterization value, it is determined that the stenosis degree of the arteriovenous fistula blood vessel is not within a reasonable range.

[0045] In an embodiment of the present invention, the value of the preset blood flow velocity characterization value is 1.2, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0046] In the implementation process, the blood flow velocity characterization value is the ratio of the blood flow velocity at the stenosis site of the arteriovenous fistula blood vessel obtained from ultrasonic data to the blood flow velocity of the adjacent normal blood vessel segment.

[0047] Specifically, the present invention determines whether there is stenosis in the arteriovenous fistula blood vessel based on the stenosis risk characterization parameters in the current detection mode through the stenosis analysis module. When stenosis exists, it determines whether the degree of stenosis is reasonable according to the blood flow velocity characterization value, realizing precise detection of the stenosis condition and its severity of the arteriovenous fistula blood vessel, improving the efficiency of timely discovery and handling of blood vessel stenosis problems, improving the dialysis quality, reducing the risk of thrombosis formation, and enhancing the detection efficiency.

[0048] Specifically, under the condition that the degree of stenosis of the arteriovenous fistula blood vessel is determined not to be within a reasonable range, the frequency adjustment module determines to adjust the massage frequency of the corresponding detection mode according to the comparison result between the ratio of the preset blood flow velocity characterization value to the blood flow velocity characterization value and the preset ratio; If the ratio is less than or equal to the preset ratio, it is determined to increase the massage frequency to the corresponding value with the first preset frequency adjustment coefficient of 1.10; If the ratio is greater than the preset ratio, it is determined to increase the massage frequency to the corresponding value with the second preset frequency adjustment coefficient of 1.30; The ratio is the ratio of the preset blood flow velocity characterization value to the blood flow velocity characterization value.

[0049] In the embodiment of the present invention, the preset ratio takes a value of 0.15, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0050] In the embodiment of the present invention, the increased massage frequency is the product of the massage frequency and the preset frequency adjustment coefficient. The preset frequency adjustment coefficient includes the first preset frequency adjustment coefficient with a value of 1.10 and the second preset frequency adjustment coefficient with a value of 1.30. The massage frequency includes the first massage frequency and the second massage frequency. To ensure that the adjusted massage frequency meets the actual requirements and the adjustment range is not too large, a corresponding adjustment coefficient is set to control the adjustment range.

[0051] Specifically, the present invention dynamically adjusts the massage frequency according to the ratio of the preset blood flow velocity characterization value to the actual blood flow velocity characterization value through the frequency adjustment module, strengthening the protection of blood vessels during hemodialysis, enhancing the blood vessel dilation efficiency, reducing the incidence rate of restenosis. Through reasonable adjustment of the massage frequency, it can timely respond to blood vessel stenosis problems and prevent unnecessary stimulation or damage to blood vessels caused by excessive adjustment amplitude.

[0052] Please refer to Figure 4 as shown, which is a flowchart for the embodiment of the present invention to determine whether the arteriovenous fistula blood vessel is damaged during dialysis.

[0053] Specifically, under the condition that the damage analysis module determines to adjust the massage frequency of the corresponding detection mode, dialysis is performed on the internal fistula blood vessel with the adjusted massage frequency, and whether the internal fistula blood vessel is damaged during dialysis is determined according to the comparison result between the bioelectrical impedance change rate of the internal fistula blood vessel after dialysis and the preset bioelectrical impedance change rate; If the bioelectrical impedance change rate is less than or equal to the preset bioelectrical impedance change rate, it is determined that the internal fistula blood vessel is not damaged during dialysis; If the bioelectrical impedance change rate is greater than the preset bioelectrical impedance change rate, it is determined that the internal fistula blood vessel is damaged during dialysis.

[0054] In the embodiment of the present invention, the preset bioelectrical impedance change rate is 15%, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0055] During implementation, the bioelectrical impedance change rate is the ratio result of the absolute value of the difference between the impedance value of the internal fistula blood vessel after dialysis and the impedance value of the internal fistula blood vessel before dialysis to the impedance value of the internal fistula blood vessel before dialysis.

[0056] Specifically, under the condition that the damage analysis module determines that the internal fistula blood vessel is damaged during dialysis, it is determined whether the damage to the internal fistula blood vessel after dialysis is within a reasonable range according to the comparison result between the tremor intensity change value and the preset tremor intensity change value; If the tremor intensity change value is less than or equal to the preset tremor intensity change value, it is determined that the damage to the internal fistula blood vessel after dialysis is within a reasonable range; If the tremor intensity change value is greater than the preset tremor intensity change value, it is determined that the damage to the internal fistula blood vessel after dialysis is not within a reasonable range.

[0057] In the embodiment of the present invention, the preset tremor intensity change value is 0.45, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0058] During implementation, the tremor intensity change value is the ratio of the relative difference in the tremor intensity of the internal fistula blood vessel during dialysis to the standard deviation of the tremor intensity of the internal fistula blood vessel during dialysis.

[0059] Specifically, in the present invention, during dialysis after adjusting the massage frequency by the damage analysis module, the bioelectrical impedance change rate is compared with the preset bioelectrical impedance change rate to determine whether the internal fistula blood vessel is damaged, and the tremor intensity change value is also used to evaluate whether the damage range of the damaged blood vessel is reasonable. Combining the bioelectrical impedance and the tremor intensity change provides a more comprehensive and accurate monitoring means for the damage of the internal fistula blood vessel, which helps to detect potential damage in time and effectively improves the dialysis quality.

[0060] Specifically, when the pressure regulation module determines that the damage to the arteriovenous fistula blood vessel after dialysis is within a reasonable range, it determines to adjust the airbag pressure of the corresponding detection mode according to the comparison result between the difference between the tremor intensity change value and the preset tremor intensity change value and the preset difference; If the difference is less than or equal to the preset difference, it is determined to reduce the airbag pressure to the corresponding value with the first preset pressure adjustment coefficient of 0.97; If the difference is greater than the preset difference, it is determined to reduce the airbag pressure to the corresponding value with the second preset pressure adjustment coefficient of 0.93; The difference is the difference between the tremor intensity change value and the preset tremor intensity change value.

[0061] In the embodiment of the present invention, the preset difference is taken as 0.23, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0062] In the embodiment of the present invention, the reduced airbag pressure is the product of the preset pressure adjustment coefficient and the airbag pressure. The preset pressure adjustment coefficient includes the first preset pressure adjustment coefficient with a value of 0.97 and the second preset pressure adjustment coefficient with a value of 0.93. The airbag pressure includes the first airbag pressure and the second airbag pressure. To ensure that the adjusted airbag pressure meets the actual requirements and the adjustment range should not be too large, the adjustment coefficient is correspondingly set to control the adjustment range.

[0063] Specifically, in the present invention, when the damage to the arteriovenous fistula blood vessel after dialysis is within a reasonable range, the pressure regulation module adjusts the airbag pressure according to the tremor intensity change value, reduces unnecessary pressure stimulation, promotes the recovery of blood vessel function, reasonably adjusts the airbag pressure, effectively avoids blood vessel damage caused by too high or too low pressure, and maintains the stability of the blood vessel tremor intensity.

[0064] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0065] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An internal fistula blood vessel detection system for hemodialysis, characterized in that, Including: A data acquisition module for acquiring ultrasonic data of an ultrasonic patch array, impedance values of electrode sensors, and tremor intensities and pressure spectra of pressure sensors; A mode determination module connected to the data acquisition module for determining a detection mode of the internal fistula blood vessel based on a tortuosity index of the internal fistula blood vessel ultrasonic data before dialysis, and determining a massage frequency and an airbag pressure of a corresponding detection mode based on a vascular compliance index jointly determined by the ultrasonic data and the pressure spectrum; A stenosis analysis module connected to the data acquisition module and the mode determination module respectively for determining whether there is stenosis in the internal fistula blood vessel based on stenosis risk characterization parameters of a corresponding detection mode, and determining whether the stenosis degree of the internal fistula blood vessel is within a reasonable range based on a blood flow velocity characterization value of the internal fistula blood vessel; A frequency adjustment module connected to the stenosis analysis module for determining an adjustment of the massage frequency of a corresponding detection mode based on a ratio of a preset blood flow velocity characterization value to a blood flow velocity characterization value; An injury analysis module connected to the data acquisition module and the frequency adjustment module respectively for determining whether the internal fistula blood vessel is damaged during dialysis based on a bioelectrical impedance change rate of the internal fistula blood vessel after dialysis, and determining whether the injury of the internal fistula blood vessel after dialysis is within a reasonable range based on a change value of the tremor intensity of the internal fistula blood vessel after dialysis; A pressure adjustment module connected to the injury detection module for determining an adjustment of the airbag pressure of a corresponding detection mode based on a difference between a tremor intensity change value and a preset tremor intensity change value.

2. The internal fistula blood vessel detection system for hemodialysis according to claim 1, characterized in that, The mode determination module determines the detection mode of the internal fistula blood vessel based on a comparison result between a tortuosity index of the internal fistula blood vessel before dialysis and a tortuosity index threshold, wherein Based on a comparison result that the tortuosity index of the internal fistula blood vessel before dialysis is less than or equal to the tortuosity index threshold, the detection mode of the internal fistula blood vessel is determined to be a first detection mode, and the first detection mode is a straight blood vessel detection mode for detecting an internal fistula blood vessel with a straight blood vessel shape; Based on a comparison result that the tortuosity index of the internal fistula blood vessel before dialysis is greater than the tortuosity index threshold, the detection mode of the internal fistula blood vessel is determined to be a second detection mode, and the second detection mode is a curved blood vessel detection mode for detecting an internal fistula blood vessel with a tortuous blood vessel shape.

3. The internal fistula blood vessel detection system for hemodialysis according to claim 2, wherein The mode determination module determines the massage frequency and the airbag pressure based on a comparison result between a vascular compliance index of the internal fistula blood vessel before dialysis and a preset vascular compliance index, wherein Based on a comparison result that the vascular compliance index of the internal fistula blood vessel before dialysis is less than or equal to the preset vascular compliance index, a first massage frequency and a first airbag pressure of a corresponding detection mode are determined; Based on a comparison result that the vascular compliance index of the internal fistula blood vessel before dialysis is greater than the preset vascular compliance index, a second massage frequency and a second airbag pressure of a corresponding detection mode are determined.

4. The arteriovenous fistula blood vessel detection system for hemodialysis according to claim 3, characterized in that, The stenosis analysis module determines that there is stenosis in the internal fistula blood vessel based on a comparison result that the stenosis risk characterization parameter of the internal fistula blood vessel before dialysis of a corresponding detection mode is greater than a preset stenosis risk characterization parameter.

5. The internal fistula blood vessel detection system for hemodialysis according to claim 4, wherein, The stenosis analysis module determines that the stenosis degree of the arteriovenous fistula blood vessel is not within a reasonable range based on the comparison result that the blood flow velocity characterization value of the arteriovenous fistula blood vessel before dialysis is greater than the preset blood flow velocity characterization value.

6. The arteriovenous fistula blood vessel detection system for hemodialysis according to claim 5, wherein The frequency adjustment module determines to increase the massage frequency with a first preset frequency adjustment coefficient based on the comparison that the ratio of the preset blood flow velocity characterization value to the blood flow velocity characterization value is less than or equal to the preset ratio.

7. The internal fistula blood vessel detection system for hemodialysis according to claim 6, wherein The frequency adjustment module determines to increase the massage frequency with a second preset frequency adjustment coefficient based on the comparison that the ratio of the preset blood flow velocity characterization value to the blood flow velocity characterization value is greater than the preset ratio.

8. The internal fistula blood vessel detection system for hemodialysis according to claim 7, characterized in that, The damage analysis module determines that the arteriovenous fistula blood vessel is damaged during dialysis based on the comparison result that the bioelectrical impedance change rate of the arteriovenous fistula blood vessel after dialysis is greater than the preset bioelectrical impedance change rate, and determines that the damage of the arteriovenous fistula blood vessel after dialysis is within a reasonable range based on the comparison result that the tremor intensity change value of the arteriovenous fistula blood vessel after dialysis is less than or equal to the preset tremor intensity change value.

9. The internal fistula blood vessel detection system for hemodialysis according to claim 8, wherein The pressure adjustment module determines to decrease the airbag pressure with a first preset pressure adjustment coefficient based on the comparison result that the difference between the tremor intensity change value and the preset tremor intensity change value is less than or equal to the preset difference.

10. The internal fistula blood vessel detection system for hemodialysis according to claim 9, wherein, The pressure adjustment module determines to decrease the airbag pressure with a second preset pressure adjustment coefficient based on the comparison result that the difference between the tremor intensity change value and the preset tremor intensity change value is greater than the preset difference.

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