CN216824314U - Wearable monitoring device for monitoring arteriovenous internal fistula - Google Patents
Wearable monitoring device for monitoring arteriovenous internal fistula Download PDFInfo
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Abstract
The invention relates to the field of medical equipment, in particular to medical monitoring equipment, and more particularly relates to an arteriovenous internal fistula visual monitoring method and a wearable monitoring device. Meanwhile, the wearable monitoring device is adopted, and the cuff which can be used by the dialysis patient in daily life is used as the wearable base of the monitoring device, so that the wearable monitoring device has the advantages of attractive appearance, small size and the like.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to medical monitoring equipment, and more particularly relates to a wearable monitoring device for visual monitoring of arteriovenous internal fistula.
Background
Vascular access is the "lifeline" of a chronic renal failure maintenance hemodialysis patient, and guidelines for improving the global prognosis organization for renal disease (KDIGO) clearly identify autologous arteriovenous fistulas the "first choice" of a maintenance hemodialysis patient. Arteriovenous fistulization is a vascular anastomosis procedure in which the artery of the forearm near the wrist is anastomosed to the adjacent vein, allowing the vein to fill with arterial blood and forming an "arteriolized vein" over time.
The blood flow in the arteriovenous internal fistula can not be too high or too low, generally speaking, the blood flow requirement of the arteriovenous internal fistula can not be lower than 400-500ml/min at the lowest so as to ensure the flow rate requirement of hemodialysis; meanwhile, the blood flow of arteriovenous internal fistula cannot exceed 2000ml/min at most, otherwise, the heart load is increased to cause heart failure.
Therefore, establishing and maintaining a good and stable arteriovenous internal fistula blood flow is the key to ensure that the maintenance hemodialysis is smoothly carried out. Statistics show that up to 15-24% of maintenance hemodialysis patients develop vascular access stenosis and embolism. The resulting failure of an arteriovenous fistula is a significant problem that plagues those skilled in the art.
Therefore, the method for monitoring the blood flow of the arteriovenous internal fistula in time and effectively evaluating the function of the arteriovenous internal fistula so as to early and timely warn the problem of the vascular access is a research focus of technicians in the field and a technical difficulty which needs to be overcome by the technicians in the field.
Currently, in the prior art, existing monitoring devices and monitoring methods rely primarily on digital subtraction angiography. Digital subtraction angiography is the accepted "gold standard" for vascular examination, but this technique requires arterial puncture and has limited clinical use.
The kidney disease prognosis quality guideline (K/DOQI) suggests that the technology of ultrasonic dilution, conductance dilution, vascular Doppler ultrasound and the like is selected every month to measure the blood flow of the arteriovenous internal fistula, but all the tests need to use larger medical equipment, and the tests are not commonly and regularly used for the maintenance of the arteriovenous internal fistula of dialysis patients in domestic medical institutions. Other indirect monitoring methods, such as laser vibrometers for measuring the fluctuation velocity amplitude of the internal fistula and detectors for measuring the noise intensity of the internal fistula, also involve the problem of relatively large measuring equipment volume. Meanwhile, because these devices are bulky and the monitoring means are relatively complex, full-time monitoring cannot be achieved. The patient is required to perform the monitoring periodically, such as every month as required in the guideline. The monitoring mode has no way to timely monitor and effectively prevent embolism or access stenosis possibly generated by the arteriovenous internal fistula.
Wearable medical devices are an important component in the field of wearable research. Such as conventionally used hearing aids, cardiac devices and insulin pumps, as well as new types of devices such as Continuous Glucose Monitors (CGM) for diabetics, new electronic skin patches and new wearable medical devices.
Disclosure of Invention
The invention aims to solve the technical problem of how to carry out full-time and high-accuracy monitoring on the blood flow of the arteriovenous internal fistula of a maintenance hemodialysis receiver, thereby providing reliable data for ensuring stable and good blood flow of the arteriovenous internal fistula, finding out the stenosis or embolism of a vascular access in time and avoiding the failure of the arteriovenous internal fistula.
In order to solve the technical problem, the invention discloses an arteriovenous internal fistula monitoring method, which comprises the following steps of:
a first part: establishing standard data for comparison, specifically comprising the following steps,
s1: the measuring light source emits measuring illumination in the region where the arteriovenous internal fistula is located;
s2: the measuring light emitted in the step S1 penetrates through the skin, is absorbed and attenuated, is reflected to the photosensitive sensor, and is captured by the photosensitive sensor to obtain an optical signal;
s3: converting the optical signal in step S2 into an electrical signal;
s4: processing the electric signals to respectively obtain waveform graphic data and characteristic numerical value signal data;
s5: respectively storing waveform graph data and characteristic numerical value signal data in a certain time period after the internal arteriovenous fistula is successfully constructed in a memory as standard data for subsequent comparison;
a second part: the method for monitoring the arteriovenous internal fistula blood flow in real time specifically comprises the following steps,
k1: the measuring light source emits measuring illumination in the region where the arteriovenous internal fistula is located;
k2: the measuring light emitted in the step K1 penetrates through the skin, is absorbed and attenuated, is reflected to the photosensitive sensor, and is captured by the photosensitive sensor to obtain an optical signal;
k3: converting the optical signal in the step K2 into an electrical signal;
k4: processing the electric signals to respectively obtain waveform graphic data and characteristic numerical value signal data;
k5: comparing the waveform pattern data and the characteristic value signal data obtained by real-time monitoring with waveform pattern data and characteristic value signal data which are stored in a memory and serve as standard data;
k6: if the comparison result simultaneously meets the following two conditions, the abnormal condition is considered to occur, otherwise, the normal condition is considered to occur,
a. the waveform image data significantly differs by more than a preset amount;
b. the eigenvalue signal data value floats by more than a threshold.
Preferably, the measurement light is light emitted by a light emitting diode, more preferably the measurement light emitted by the measurement light source is green light.
As a preferred technical solution, the photosensitive sensor is a photodiode.
Further preferably, the processing the electrical signal to obtain the waveform pattern data specifically includes: and converting the intensity of the electric signal into an amplitude signal, presenting the intensity of the corresponding amplitude signal at different time points, and drawing the amplitude signal change along with the time change.
Meanwhile, preferably, the processing of the electrical signal to obtain the characteristic numerical value signal data means: the intensity change rule of the amplitude in the waveform graph data and the change rule of the area under the curve of the waveform in unit time.
Further, in step K6, the waveform image data indicated by the difference is: the waveform pattern data measured in real time is compared with the waveform pattern as standard data in the memory, and if the intensity change rule of the waveform amplitude or/and the area change rule under the curve of the waveform in unit time have 25% value change.
Further preferably, the preset amount is 10 minutes, and when the waveform image data significantly differs for 10 minutes, the determination condition a in step K6 is considered to be satisfied.
Preferably, the present invention further discloses that the comparison threshold of the characteristic value signal data value is 25%, that is, if the monitored characteristic value signal data value is higher than the characteristic value signal standard data value by 25%, or lower than the characteristic value signal standard data value by 25%, the judgment condition b in step K6 is satisfied.
Further preferably, the method further comprises data remote transmission, and the waveform image data, the characteristic value signal data and the comparison result are transmitted to a specific receiver through a data transmission technology.
Further preferably, the method further comprises data display, wherein the waveform image data, the characteristic numerical value signal data and the comparison result are displayed through a display.
In a preferred technical scheme, the method further comprises an alarm, and when the step K6 judges that the abnormality occurs, the alarm is given out. It is further preferred that the alarm is provided in the form of an optical alarm, and/or an acoustic alarm.
In a preferred embodiment, the number of the measuring light sources is two or more. Thus, at one point in time, a series of data at different locations is formed. More preferably, the measuring light sources are arranged in pairs. It is further preferable that the measurement light source is arranged along the wrist where the arteriovenous internal fistula is located, and the measurement light source may be arranged in pairs or not.
When the measurement light sources are arranged at the wrist where the arteriovenous internal fistula is located in pairs, the data of the two measurement light sources arranged in pairs are integrated into one data. Namely: two measuring light sources at the relative position of the sleeve shaft diameter are used as a pair of light sources, and when the measured optical signals are converted into electric signals to further form graphic signals, the amplitude signals at the same time point are mutually superposed and integrated into a group of graphic signals.
Preferably, when the data is a series of multi-point data, the data is first subjected to weight sorting, and the data is subjected to weight sorting so that the weight increases as the optical signal becomes weaker. The weaker the light signal reflected by the measurement light source, the stronger the blood flow signal of the measured part is, and the more thorough the light signal is absorbed, which correspondingly suggests that the position relationship between the measurement point and the arteriovenous fistula is the closest, and the weight in the signal measurement is also larger.
Meanwhile, the invention also discloses a wearable monitoring device suitable for the arteriovenous internal fistula monitoring method, which comprises a monitoring component, a controller and a memory, wherein the monitoring component consists of a light emitting diode and a photodiode, the photodiode is respectively connected with the memory and the controller, the memory is connected with the controller, the monitoring component, the controller and the memory are all fixed on a wearable substrate, and the monitoring component is fixed on one side, close to the skin, of the wearable substrate.
Further preferably, the system further comprises a communication device, and the communication device is connected with the controller. Preferably, the communication device is bluetooth.
More preferably, the device further comprises an alarm device, and the alarm device is connected with the controller. Further preferably, the alarm device comprises a sound emitting device and/or a light emitting device. Further preferably, the sound-emitting device is a buzzer, and the light-emitting device is an alarm lamp.
The controller referred to herein is preferably a CPU controller.
Further, it is particularly preferred that the wearable substrate is a cuff, and the monitoring assembly is fixed inside the cuff. In a preferred technical solution, the sleeve is an allergy-free breathable elastic sleeve. More preferably, the monitoring assembly is embedded in an arteriovenous cuff. Preferably, the thickness of the cuff is 5mm or more. Particularly preferably 5 mm.
It is further preferred that the monitoring components are two or more and are fixedly arranged at the inner side of the arteriovenous oversleeve in a ring shape.
More preferably, the monitoring components are fixedly arranged at the inner side of the sleeve in pairs in a ring shape, and the two monitoring components in the pair are respectively arranged at two end points of the diameter.
When there are a plurality of monitoring modules, each monitoring module sequentially performs data monitoring in a predetermined order.
After the technical scheme disclosed by the invention is adopted, the following beneficial effects are achieved:
firstly, the monitoring device disclosed by the invention is a wearable monitoring device, and the cuff which can be used by a dialysis patient in daily life is used as a wearable base of the monitoring device, so that the monitoring device has the advantages of attractive appearance, small size and the like, and meanwhile, the monitoring device is wearable, so that real-time monitoring can be realized. Meanwhile, beneficial information can be provided for medical physiological observation of arteriovenous internal fistula through the gradual change rule of the mode waveform acquired by the smart phone.
Secondly, the invention considers the individualized change of the blood flow of the arteriovenous internal fistula of different users, forms the individualized blood flow waveform in the arteriovenous internal fistula of a specific user after a dialysis patient uses for a period of time, and simultaneously continuously updates standard model data according to the blood flow change of the patient in use, realizes the individuation of monitoring and treatment, and avoids ineffective alarm as far as possible.
Thirdly, because the combination of the elements of the monitoring device is arranged in a ring-shaped distribution manner, the direction and the angle of the sleeve do not need to be considered by a user in the wearing process. Meanwhile, the data of a plurality of monitoring elements which are arranged in a ring shape are comprehensively considered, and the final comprehensive signal is obtained through weighting calculation. Therefore, the monitoring signal has stability, and data abnormity cannot occur along with wearing or movement.
Finally, the acousto-optic alarm module is placed on the outer surface of the oversleeve, and once the acquired blood flow information is obviously different from the mode waveform memorized by the equipment or the smart phone, the acousto-optic alarm module can automatically give an alarm. The sound-light stimulation is integrated, the possible problems of the arteriovenous internal fistula of a user can be reminded at the first time, and the alarm efficiency of the monitoring device is improved.
In summary, by using the wearable monitoring device and the matched arteriovenous internal fistula visual monitoring method disclosed by the invention, the blood flow of the arteriovenous internal fistula can be measured in real time, and the real-time monitoring of the blood flow of the internal fistula is realized. Meanwhile, the monitoring result is transmitted to external equipment, such as a smart phone, through Bluetooth or other wireless communication means, so that visualization of data monitoring and recording is achieved.
Drawings
FIG. 1 is a schematic view of a wearable monitoring device;
fig. 2 is a schematic arrangement diagram of monitoring components in the wearable monitoring device.
Detailed Description
In order that the invention may be better understood, we now provide further explanation of the invention with reference to specific examples.
The wearable monitoring device as shown in fig. 1 and 2 comprises a monitoring component 1, a controller 2 and a memory 3, wherein the monitoring component is composed of a light emitting diode and a photodiode, the photodiode is connected with the memory 3 and the controller 2 respectively, the memory 3 is connected with the controller 2, the monitoring component 1, the controller 2 and the memory 3 are all fixed on a wearable substrate, in this embodiment, we see that the wearable substrate is a sleeve 4, as shown in fig. 2, the sleeve preferably has a certain thickness, in this embodiment, the thickness is preferably 5mm, and the monitoring component 1 is fixed on the side of the wearable substrate close to the skin.
Further preferably, in the present embodiment, a communication device 5 is further included, and the communication device 5 is connected to the controller 2. Preferably, the communication device is bluetooth.
More preferably, the device further comprises an alarm device 6, and the alarm device 6 is connected with the controller 2. Further preferably, the alarm device comprises a sound emitting device and/or a light emitting device. In this embodiment, the alarm device preferably includes both a sound device and a light device. Wherein the sound generating device is a buzzer 601, and the light emitting device is an alarm lamp 602.
In this embodiment, the controller is a CPU controller.
With reference to fig. 1 and 2, it can be seen that in the present embodiment, two or more monitoring units are further preferably arranged and fixed inside the arteriovenous cuff in a ring shape. In this embodiment, we design six monitoring components, each of which includes a light emitting diode and a photodiode. The six monitoring components are individually identified as A, B, C, D, E, F.
More preferably, the monitoring components are fixedly arranged at the inner side of the sleeve in pairs in a ring shape, and the two monitoring components in the pair are respectively arranged at two end points of the diameter.
As shown in fig. 2, in the present embodiment, the six monitoring elements may be divided into three pairs, one pair of monitoring elements A, D, one pair of monitoring elements B, E, and one pair of monitoring elements C, F.
With reference to fig. 1 and 2, the working principle of the wearable monitoring device and the implementation of the visual monitoring are further elucidated below.
The arteriovenous internal fistula monitoring method in the embodiment comprises two parts. The first part is to establish standard data for comparison, and the second part is to monitor the blood flow of arteriovenous internal fistula in real time and send out alarm signal to abnormal blood flow signal.
After the patient finishes the internal arteriovenous fistula operation, for fixed, can wear the oversleeve that is used for fixing for the patient. The monitoring device is used as a wearable base through the sleeve and is contacted with the arm of the arteriovenous internal fistula of the patient. The monitoring assembly, which is secured to the inside surface of the sleeve as shown in fig. 2, is applied in a loop to the skin surface of the user's forearm. Because the light signals emitted by the light emitting diode in the monitoring device are absorbed in different positions to different degrees, the blood flow at the positions can be reflected by the light signals with different intensities received by the photodiode.
When the user wears the oversleeve,
s1: the measuring light source emits measuring illumination in the region where the arteriovenous internal fistula is located; for example, in the present embodiment, the preferable measurement light source is a green light signal emitted by the light emitting diode;
s2: the measuring light emitted in the step S1 penetrates through the skin, is absorbed and attenuated, is reflected to the photosensitive sensor, and is captured by the photosensitive sensor to obtain an optical signal; for example, in the present embodiment, the green light signal is emitted through the light emitting diodes in the six monitoring assemblies a to F, and is absorbed by the forearm of the skin to which the monitoring assemblies are attached, so as to form a reflected green light signal, and the green light signal is collected by the photodiode and transmitted to the controller;
s3: converting the optical signal in step S2 into an electrical signal;
s4: processing the electric signals to respectively obtain waveform graphic data and characteristic numerical value signal data;
for example, in the present embodiment, the controller can complete the conversion between the optical signal and the electrical signal; and further transmitting the signal to a memory;
s5: respectively storing waveform graph data and characteristic numerical value signal data in a certain time period after the internal arteriovenous fistula is successfully constructed in a memory as standard data for subsequent comparison;
through the above process, standard data for alignment can be constructed. Generally, the waveform pattern data and the characteristic value signal data of 72 hours are used as comparison bases.
Here, at the time of starting the use, a database based on waveform pattern data and characteristic numerical signal data of 72 hours of the user is first established. With the continuous monitoring, the new data continuously replaces the data in the original database, and the data used for comparison is always the data within 72 hours of the near comparison time point.
Therefore, the individualized internal fistula blood flow model of the user can be formed and is continuously updated along with the individualized change of the user, the individualized monitoring is realized, and the invalid alarm caused by standard stereotypy is effectively avoided.
In the following, we will describe the part for monitoring the arteriovenous internal fistula blood flow in real time, which specifically includes the following steps,
k1: the measuring light source emits measuring illumination in the region where the arteriovenous internal fistula is located;
k2: the measuring light emitted in the step K1 penetrates through the skin, is absorbed and attenuated, is reflected to the photosensitive sensor, and is captured by the photosensitive sensor to obtain an optical signal;
k3: converting the optical signal in the step K2 into an electrical signal;
k4: processing the electric signals to respectively obtain waveform graphic data and characteristic numerical value signal data;
the acquisition of real-time data is similar to the acquisition of standard data as described above. In the embodiment, the measuring light source is a green light signal emitted by the light emitting diode; the green light signals are emitted by the light emitting diodes in the six monitoring assemblies A-F, and are respectively absorbed by the forearms at the positions of the skins attached to the light emitting diodes to form reflected green light signals, and the green light signals are collected by the photodiodes and transmitted to the controller.
After the controller obtains the waveform graphic data and the characteristic value signal data which are monitored in real time, the controller further retrieves the stored standard data for comparison from the memory; and the number of the first and second electrodes,
k5: comparing the waveform pattern data and the characteristic value signal data obtained by real-time monitoring with waveform pattern data and characteristic value signal data which are stored in a memory and serve as standard data;
k6: if the comparison result simultaneously meets the following two conditions, the abnormality is considered to occur, otherwise, the abnormality is considered to be normal,
a. the waveform image data significantly differs by more than a preset amount; for example, the waveform image data in the present embodiment is significantly different from the following: comparing the waveform pattern data measured in real time with a waveform pattern serving as standard data in a memory, and if the intensity change rule of the waveform amplitude or/and the area change rule under the waveform curve in unit time have 25% value change; specifically, the preset amount is preferably 10 minutes, and when the waveform image data significantly differs for 10 minutes, the waveform image data is considered to be significantly different;
b. the characteristic value signal data value fluctuation is greater than a threshold value; for example, in this embodiment, the comparison threshold of the characteristic value signal data value is preferably 25%, that is, if the monitored characteristic value signal data value is higher than the characteristic value signal standard data value by 25% or lower than the characteristic value signal standard data value by 25%, it is considered that the characteristic value signal data value is more than the threshold value in the floating state.
It should be further explained that, in this embodiment, processing the electrical signal to obtain the waveform pattern data specifically means: converting the intensity of the electric signal into an amplitude signal, presenting the intensity of the corresponding amplitude signal at different time points, and drawing the amplitude signal change along with the time change; processing the electrical signal to obtain characteristic numerical signal data means: the intensity variation law of the amplitude in the waveform graph data and the variation law of the area under the curve of the waveform in unit time.
In this embodiment, it is further preferable that the method further includes data remote transmission, and the waveform image data, the characteristic value signal data, and the comparison result are transmitted to a specific receiver through a data transmission technology, for example, the data can be transmitted to the smart phone through bluetooth, so that the data can be further transmitted to a port of a doctor of a user or a specific system by means of a communication function of the smart phone, thereby realizing acquisition and storage of personalized data.
Further preferably, the method further comprises data display, and the waveform image data, the characteristic numerical value signal data and the comparison result are displayed through a display. For example, the patient can visually see the real-time monitoring data and the comparison result in a visual manner on the own smart phone or the doctor on a specific display interface.
Preferably, the present embodiment further includes an alarm, and the alarm is issued when it is determined in step K6 that an abnormality occurs. More preferably, the buzzer 601 sounds an alarm, the alarm lamp 602 blinks, and a light alarm is given.
We now describe the method of fitting sets of data in more detail with reference to the diagram in fig. 2.
As shown in fig. 2, in the present embodiment, the six monitoring assemblies may be divided into three pairs, one pair being the monitoring assembly A, D, one pair being the monitoring assembly B, E, and one pair being the monitoring assembly C, F.
When the user is wearing the sleeve, the monitoring component A, B, C, D, E, F forms a series of data for different locations at the same point in time. The data at the two measuring light sources arranged in pairs are combined into one data. Namely: two measuring light sources at the relative position of the sleeve shaft diameter are used as a pair of light sources, and when the measured optical signals are converted into electric signals to further form graphic signals, the amplitude signals at the same time point are mutually superposed and integrated into a group of graphic signals.
This forms three sets of signals, data one from monitoring component A, D, data two from monitoring component B, E, and data three from monitoring component C, F.
These three groups of data are first weighted and ranked, and the data are weighted so that the weaker the optical signal is, the higher the weight is. Since the blood flow volume adjacent to the arteriovenous fistula is large, the weaker the light signal reflected by the measuring light source is, the stronger the blood flow signal of the measured part is prompted, the more thorough the degree of absorption of the light signal is, and accordingly, the closest relationship between the measuring point and the arteriovenous fistula is prompted, and therefore, the greater weight is given to the measuring point during signal fitting.
If the monitoring components are a plurality of monitoring components which are asymmetrically arranged, data do not need to be superposed, weight sorting is carried out according to the strength of signals respectively, and similarly, the data are also subjected to weight sorting in a mode that the weaker the optical signal is, the higher the weight is.
Therefore, the important attention objects can be concentrated at the arteriovenous internal fistula, the change signals of the blood flow at the arteriovenous internal fistula are amplified, and the blood flow change of blood vessels in other forearms is reduced, so that the monitoring accuracy and sensitivity are improved.
What has been described above is a specific embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (15)
1. A wearing formula monitoring devices for arteriovenous internal fistula monitoring, its characterized in that: including monitoring subassembly, controller, memory, wherein the monitoring subassembly comprises emitting diode and photodiode, photodiode is connected respectively with memory and controller, the memory is connected with the controller, monitoring subassembly, controller, memory are all fixed on wearable basement to the monitoring subassembly is fixed in the skin one side that is close to of wearable basement.
2. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 1, wherein: the intelligent control system also comprises a communication device, and the communication device is connected with the controller.
3. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 1, wherein: the communication device is Bluetooth.
4. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 1, wherein: the device also comprises an alarm device, and the alarm device is connected with the controller.
5. The wearable monitoring device for arteriovenous fistula monitoring of claim 4, wherein: the alarm device comprises a sound generating device and/or a light emitting device.
6. A wearable monitoring device for arteriovenous fistula monitoring of claim 5, wherein: the sounding device is a buzzer.
7. A wearable monitoring device for arteriovenous fistula monitoring of claim 5, wherein: the light-emitting device is an alarm lamp.
8. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 1, wherein: the controller is a CPU.
9. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 1, wherein: the wearable base is a sleeve, and the monitoring assembly is fixed on the inner side of the sleeve.
10. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 9, wherein: the arteriovenous oversleeve is an anti-allergic breathable elastic oversleeve.
11. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 9, wherein: the monitoring component is embedded in the arteriovenous oversleeve.
12. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 9, wherein: the thickness of the oversleeve is more than 5 mm.
13. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 12, wherein: the thickness of the oversleeve is 5 mm.
14. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 1, wherein: the monitoring components are two or more and are fixedly arranged at the inner side of the arteriovenous oversleeve in an annular shape.
15. A wearable monitoring device for arteriovenous fistula monitoring as set forth in claim 1, wherein: the monitoring components are fixedly arranged on the inner sides of the arteriovenous oversleeves in pairs in an annular shape, and the two monitoring components in pairs are respectively arranged at two end points of the diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022918545.4U CN216824314U (en) | 2020-12-08 | 2020-12-08 | Wearable monitoring device for monitoring arteriovenous internal fistula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022918545.4U CN216824314U (en) | 2020-12-08 | 2020-12-08 | Wearable monitoring device for monitoring arteriovenous internal fistula |
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| Publication Number | Publication Date |
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| CN216824314U true CN216824314U (en) | 2022-06-28 |
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| CN202022918545.4U Expired - Fee Related CN216824314U (en) | 2020-12-08 | 2020-12-08 | Wearable monitoring device for monitoring arteriovenous internal fistula |
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| Country | Link |
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| CN (1) | CN216824314U (en) |
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