WO2025139981A1 - Monitoring system for detecting thrombosis - Google Patents

Abstract

A monitoring system for detecting deep venous thrombosis, relating to the technical field of medical instruments. The monitoring system comprises a signal acquisition module and an ultrasonic hardware system. The signal acquisition module performs ultrasonic transceiving between a plurality of ultrasonic probes and a detected object to acquire ultrasonic detection data of the detected object, converts the ultrasonic detection data to analog signals by means of 128 channels in the ultrasonic probe, and transmits the analog signals to the ultrasonic hardware system. The ultrasonic hardware system comprises a multiplexer module, an analog signal processing module, a beamforming module, and an upper computer module. The monitoring system facilitates medical staff in monitoring the deep venous thrombosis of a patient. By arranging the plurality of ultrasonic probes, the monitoring system can monitor veins at different positions of the patient, thereby avoiding tedious operations during detection, and enabling the real-time detection of thrombosis of multiple lower limb veins of the patient.

Description

A monitoring system for detecting thrombosis Technical Field

The present invention relates to the technical field of medical devices, and in particular to a monitoring system for detecting thrombosis.

Background Art

Deep venous thrombosis (DVT) in the lower extremities is a common disease in patients with acute and critical illnesses and orthopedic surgery. DVT often leads to life-threatening pulmonary embolism (PE). Even if patients survive a PE attack, there is still a risk of chronic thromboembolic pulmonary hypertension, which can lead to death within 2-3 years after the first attack. Therefore, early diagnosis of DVT and timely adoption of corresponding clinical decisions can help reduce the incidence and mortality of thrombosis in patients and improve prognosis. At present, there is no effective monitoring and early warning method for DVT in related studies at home and abroad. It is particularly important to establish a real-time, convenient and accurate DVT monitoring method.

Ultrasound examination of the patient's lower limb veins generally requires a conventional bedside ultrasound device, which is performed by a professional ultrasound physician. The process is complicated and cannot achieve real-time dynamic monitoring.

In the prior art, Chinese patent CN103721348A discloses an ultrasonic monitoring treatment device and an ultrasonic monitoring device, which include: an ultrasonic medium containing unit for containing an ultrasonic wave conductive medium; an ultrasonic monitoring probe for emitting ultrasonic waves for imaging, whose emitting surface is located in the ultrasonic medium containing unit; an ultrasonic treatment head for emitting ultrasonic waves for treatment, whose emitting surface is located in the ultrasonic medium containing unit; a sound-absorbing material containing unit located in the ultrasonic medium containing unit, which includes a flexible sound-transmitting membrane for enclosing a liquid sound-absorbing material capable of absorbing ultrasonic waves; and a sound-absorbing material charging and discharging unit for charging or withdrawing liquid sound-absorbing material into or out of the sound-absorbing material containing unit.

Chinese patent CN215458154U portable ultrasonic detection device suitable for human or animal discloses a portable ultrasonic detection device suitable for human or animal, which includes a host and a display, the host includes a shell rotatably connected to the display and a control panel installed on the shell, the shell includes a first side, a second side arranged opposite to the first side, and a periphery connected between the first side and the second side, the control panel is arranged on the first side, wherein the host also includes a buffer protection component, the periphery includes at least two edge portions and a corner portion transitionally connected between two adjacent edges, and the buffer protection component includes a corner protection portion covering the corner portion. By arranging the buffer protection component on the shell of the host, when the host falls, the buffer protection component covered on the outside of the host shell first contacts the ground, thereby effectively buffering the impact force of the host falling to the ground, thereby effectively reducing the phenomenon of damage to the host due to falling.

In the prior art, ultrasound and its various components are used to facilitate the use of ultrasound detection and increase the anti-destructiveness of the device. However, ultrasound equipment generally requires professional ultrasound physicians to operate, the operation process is complicated, and real-time dynamic monitoring cannot be achieved. In response to the above problems, the present invention provides a monitoring system for detecting thrombosis. By fixing a patch-style transducer and a solid coupling gel on the corresponding skin surface of the patient's lower limb veins with tape, real-time dynamic monitoring of the changes in the lower limb veins can be achieved, solving the problem that the lower limb venous thrombosis detection operation process is complicated and cannot be monitored in real time.

Summary of the invention

A monitoring system for detecting thrombosis is provided by placing an ultrasonic detection device in an ultrasonic probe, and making it into a patch and sticking it on the patient's lower limb veins for monitoring, and processing it through a hardware system, so that the situation in the patient's lower limb veins is displayed in real time by a host computer, so that the lower limb vein thrombosis detection operation process is simplified and multiple real-time monitoring is achieved. Based on this, the present invention is completed.

First aspect

The present invention provides a monitoring system for detecting thrombosis, which comprises:

Signal acquisition module and ultrasound hardware system.

The signal acquisition module obtains ultrasonic detection data of the inspected part by transmitting and receiving ultrasonic waves between multiple ultrasonic probes and the inspected part, and converts the ultrasonic detection data into analog signals through the 128 channels in the ultrasonic probe and transmits them to the ultrasonic hardware system;

The ultrasonic hardware system comprises a multi-path selection module, an analog signal processing module, a beamforming module and a host computer module.

in

Multi-channel selection module: receives 128-channel analog signals output by multiple ultrasonic probes transmitted by the signal acquisition module, and selects one of the 128-channel analog signals output by multiple ultrasonic probes, allowing only the 128-channel analog signal of the selected probe to pass, and transmits the 128-channel analog signal to the analog signal processing module; the selection of multiple ultrasonic detection data is based on the observation requirements of the actual detection site;

Analog signal processing module: The selected 128-channel analog signals enter the analog signal processing module. Each analog signal will undergo low-noise amplification, noise reduction filtering, variable gain amplification, and analog-to-digital signal conversion, and finally be converted into digital 128-channel 12-bit channel data and transmitted to the beamforming module;

Beamforming module: The digitized 128-channel 12-bit channel data is input into the beamforming module. According to the delay time calculated by the system, each channel data is delayed compensated so that the compensated digitized 128-channel 12-bit channel data are phase-aligned. Then, the 128-channel 12-bit channel data after delay compensation are synthesized into one channel of data by accumulation operation. The synthesized beam signal data is IQ demodulated and low-pass filtered to obtain baseband IQ data within a certain bandwidth range.

The synthesized beam signal data is subjected to IQ demodulation and low-pass filtering to obtain baseband IQ data within a certain bandwidth range.

Perform image preprocessing on the baseband IQ data, including envelope extraction, logarithmic compression, etc., to finally obtain image data that can be displayed.

The processed image data is transmitted to the host computer module.

Host computer module: The processed digital signal is displayed on the host computer in the form of image data.

Furthermore, the host computer may be a display.

Furthermore, the host computer module interactively controls the ultrasound hardware system, specifically controls the multi-channel selection module to select the incoming analog signal;

Furthermore, the host computer module sends commands to the ultrasound hardware system, thereby controlling the signal acquisition module to acquire signals, and the acquisition method is that the user controls and starts multiple probe scanning functions through the host computer module.

One implementation mode of the present invention is as follows: the host computer module sends a command to the ultrasound hardware system via WIFI, command 1, which allows the multiplexer to select only probe 1, scan for S seconds, rest for G seconds, and the image of probe 1 is uploaded to the host computer in real time, followed by command 2, which allows the multiplexer to select only probe 2, scan for S seconds, rest for G seconds, and the image of probe 2 is uploaded to the host computer in real time, and finally command 3, which allows the multiplexer to select only probe 3, scan for S seconds, rest for G seconds, and the image of probe 3 is uploaded to the host computer in real time, and then the host computer module controls the multiplexer to switch back to probe 1, and so on, until the time to start the three-probe scanning function exceeds T seconds, the software control system stops scanning, and the host computer module obtains the image data of the three probes respectively.

Second aspect

The present invention provides a monitoring device for detecting thrombosis, which comprises:

Detection components, detection host 1 and host computer 2,

in

A detection component, the detection component comprises the signal acquisition module described in the first aspect, wherein the ultrasonic detection probe is a patch probe 3, one end of the probe 3 is connected to a data line 4, and is connected to the detection host 1 through a plug;

The detection host 1 includes a control mainboard 1008, a heat sink 1006, a power converter 1007 and a housing 1003.

in

The control mainboard 1008, the heat sink 1006, the power converter 1007 and the housing 1003 are placed in the housing 1003.

The control mainboard 1008 is loaded with the ultrasonic hardware system described in the first aspect, analyzes and processes various data, controls other electrical appliances in the device, and is responsible for information transmission.

The shell 1003 is connected by a snap-on method, so that a cavity is formed inside the detection host.

A naked switch 1001 is provided on one side of the housing 1003, which is the power switch of the detection host 1.

The housing 1003 has a hole on one side thereof to provide an interface 1002 for connecting with an external detection device to achieve signal transmission.

The detection host is provided with a battery 1005 for supplying power to other electrical appliances of the device.

The radiator 1006 is used to dissipate heat from the control mainboard 8 to prevent it from being overheated.

The power converter 1007 converts the electric energy during charging so that the electric energy is stored in the battery 1005 .

A host computer 2, which is connected to the detection host 1 by signal and is used for displaying relevant images and information;

A connecting plate 5 and a supporting plate 6 for supporting the connecting plate 5 are provided on the upper surface of the detection host 1 . One side of the connecting plate 5 is rotatably connected to the detection host 1 and is connected to the host computer 2 by magnetic attraction.

Compared with the prior art, the monitoring system for detecting thrombosis provided by the present invention has the following technical advantages:

The present invention provides a monitoring system for detecting thrombosis. The system uses a patch probe to perform ultrasonic detection on the patient's lower limb veins, which is convenient for medical staff to monitor the patient's lower limb venous thrombosis. By setting up multiple ultrasonic probes, the veins at different locations of the patient can be monitored, avoiding tedious operations during detection, and performing real-time thrombosis detection on multiple veins of the patient.

Other features and advantages of the present invention will be described in detail in the following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of the overall structure of a monitoring system for detecting thrombosis according to the present invention.

FIG. 2 is a schematic diagram of the overall structure of a monitoring device for detecting thrombosis according to the present invention.

FIG3 is a schematic diagram of the structure of a monitoring device for detecting thrombosis according to the present invention after removing the host computer.

FIG. 4 is a schematic diagram of a monitor for detecting thrombosis according to the present invention with a connecting plate removed.

FIG. 5 is a schematic diagram of a folded support plate of a monitoring device for detecting thrombosis according to the present invention.

FIG. 6 is a schematic diagram of the internal structure of a monitoring device for detecting thrombosis according to the present invention.

FIG. 7 is a schematic diagram of the internal structure of a monitoring device for detecting thrombosis according to the present invention.

FIG8 is a schematic diagram of normal lower limb veins under two-dimensional conditions in Example 2 of the present invention.

FIG9 is a schematic diagram of thrombosis in the lower extremity veins under two-dimensional conditions in Example 2 of the present invention.

FIG10 is a schematic diagram of normal lower limb veins under color Doppler conditions in Example 2 of the present invention.

FIG. 11 is a schematic diagram of thrombosis in the lower extremity veins under color Doppler conditions in Example 2 of the present invention.

FIG12 is a schematic diagram of lower limb veins under spectral Doppler conditions in Example 2 of the present invention.

FIG. 13 is a schematic diagram of beam synthesis of a monitor for detecting thrombosis in Example 1 of the present invention.

FIG. 14 is a schematic diagram of demodulation and filtering of a monitoring device for detecting thrombosis in Example 1 of the present invention.

The reference numerals are as follows:
1-Detection host; 2-Upper computer; 3-Patch probe; 4-Data line; 5-Connection board; 6-Support board; 1001-
Power switch; 1002-interface; 1003-housing; 1004-protective shell; 1005-battery; 1006-radiator; 1007-power converter; 1008-mainboard.

DETAILED DESCRIPTION

In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

Example 1 A monitoring device for detecting thrombosis

As shown in Figures 1-7, 13, and 14

A monitoring device for detecting thrombosis, comprising:

Detection components, detection host 1 and host computer 2.

in

Detection components,

The detection component includes a signal acquisition module, which performs ultrasonic transmission and reception between multiple ultrasonic probes and the inspected part to obtain ultrasonic detection data of the inspected object, and converts the ultrasonic detection data into an analog signal through 128 channels in the ultrasonic probe, and transmits it to the detection host 1; wherein the ultrasonic detection probe is a patch probe 3, one end of the probe 3 is connected to a data cable 4, and is connected to the detection host 1 through a plug.

Detect host 1,

The detection host 1 includes a control mainboard 1008 and an ultrasonic hardware system mounted on the control mainboard 1008, a heat sink 1006, a power converter 1007 and a housing 1003.

in

The control mainboard 1008, the heat sink 1006, and the power converter 1007 are placed in the housing 1003, and the housing 1003 is connected by a card and form a cavity inside the detection host.

A naked switch 1001 is provided on one side of the housing 1003, which is the power switch of the detection host 1.

An interface 1002 is provided through a hole on one side of the housing 1003 for connecting with an external detection device to achieve signal transmission.

The detection host is provided with a battery 1005 inside for supplying power to other electrical appliances of the device.

The radiator 1006 is used to dissipate heat from the control mainboard 8 to prevent it from being overheated.

The power converter 1007 converts the electric energy during charging so that the electric energy is stored in the battery 1005 .

The ultrasonic hardware system comprises a multi-path selection module, an analog signal processing module, a beamforming module and a host computer module.

in

Multi-channel selection module: receives the 128-channel analog signals output by the three ultrasonic probes transmitted by the signal acquisition module, and selects one of the 128-channel analog signals output by the three ultrasonic probes, allowing only the 128-channel analog signal of the selected probe to pass, and transmits the 128-channel analog signal to the analog signal processing module; the selection of the three ultrasonic detection data is based on the observation requirements of the actual detection part;

Analog signal processing module: The selected 128-channel analog signals enter the analog signal processing module. Each analog signal will undergo low-noise amplification, noise reduction filtering, variable gain amplification, and analog-to-digital signal conversion, and finally be converted into digital 128-channel 12-bit channel data and transmitted to the beamforming module;

The single-channel analog signal chain parameters are as follows:

1. The low noise gain amplifier (LNA) of the receiving circuit supports adjustable gain of +12dB or +18dB.

2. The variable gain amplifier (VGA) of the receiving circuit supports linear adjustable gain from 0dB to +30dB.

3. The anti-aliasing filter (AAF) of the receiving circuit supports bandwidths of 9MHz, 10MHz, 15MHz, and 18MHz

The ADC resolution of the receiving circuit is 12 bits and the sampling rate is 50MHz;

Beamforming module: The digitized 128-channel 12-bit channel data is input into the beamforming module. According to the delay time calculated by the system, each channel data is delayed compensated so that the compensated digitized 128-channel 12-bit channel data are phase-aligned. Then, the 128-channel 12-bit channel data after delay compensation are synthesized into one channel of data by accumulation operation. The synthesized beam signal data is IQ demodulated and low-pass filtered to obtain baseband IQ data within a certain bandwidth range.

As shown in Figure 13

Assume that at time t, 128 receiving channels input data x1(t), x2(t)...x128(t). After delay accumulation calculation, each channel ch will calculate a corresponding path delay τ _ch (t) . Each channel data uses its own τ _ch (t) for delay compensation, and then all are accumulated to form the beamformed data S(t) .

The synthesized beam signal data is subjected to IQ demodulation and low-pass filtering to obtain baseband IQ data within a certain bandwidth range.

As shown in Figure 14

The beamformed signal S(t) is a modulated signal containing a carrier. To facilitate subsequent processing, it needs to be aligned for demodulation and low-pass filtering to convert it into a baseband signal with a center frequency of 0 and suppress useless signals outside the design bandwidth.

Demodulate the signal, that is, multiply S(t) by a complex demodulation factor.

e ^-i*2*π*fc*t = Cos(2*π*fc*t)-j*sin(2**π*fc*t) , where fc is the demodulation frequency. In this way, IQ demodulation data containing baseband signals can be obtained. In actual operation, S(t) is copied into two signals, multiplied by cos(2*π*fc*t) and sin(2*π*fc*t) respectively.
I _dem (t)＝S(t)*cos(2*π*fc*t)
Q _dem (t)＝S(t)*-sin(2*π*fc*t)

The demodulated IQ data contains unnecessary high-frequency components, so we need to pass the above IQ data through a low-pass filter (LPF) to obtain the IQ signal within the desired bandwidth. Assuming that the signal bandwidth we need is B, we set the cutoff frequency of the low-pass filter function H(t) to B/2 to obtain the final IQ data.

I(t)＝ _Idem (t)ΦH(t),
Q(t)＝ _Qdem (t)ΦH(t),

In the above formula, Φ represents the convolution operation symbol.

Perform image preprocessing on the baseband IQ data, including envelope extraction, logarithmic compression, etc., to finally obtain image data that can be displayed.

The IQ data obtained by demodulation and filtering carries the phase and amplitude information of the original beam data, and the B mode requires the amplitude, so it is necessary to perform envelope operation on the IQ data to obtain the amplitude of the original beam data.

The amplitude range of the envelope data A(t) far exceeds the pixel range (0 to 255) that can be realized by the computer, so it needs to be logarithmically compressed so that it is within the range of 0 to 255.
P(t)＝A* _log10 (A(t))+B，

A and B are compression parameters, which are adjusted according to the actual debugging situation to obtain a good image display effect. Usually, the initial value of A is 20, the initial value of B is 0, and P(t) is the final pixel value of the image to be displayed.

The processed image data is transmitted to the host computer 2.

The upper computer 2, the display component 2 is connected to the detection host 1 by signal, and is used for displaying relevant images and information.

The host computer 2 interactively controls the ultrasonic hardware system, specifically controls the multi-way selection module to select the incoming analog signal; sends commands to the ultrasonic hardware system, and then controls the signal acquisition module to acquire signals. The acquisition method is that the user controls the start of the three probe scanning functions through the host computer 2. The host computer 2 sends commands to the ultrasonic hardware system through WIFI. At the beginning, the multi-way selector only selects probe 1, scans for S seconds, rests for G seconds, and the image of probe 1 is uploaded to the host computer in real time. Then the software controls the multi-way selector only selects probe 2, scans for S seconds, rests for G seconds, and the image of probe 2 is uploaded to the host computer 2 in real time. Finally, the software controls the multi-way selector only selects probe 3, scans for S seconds, rests for G seconds, and the image of probe 3 is uploaded to the host computer 2 in real time. Then the host computer 2 controls the multi-way selector to switch back to probe 1, and so on. Until the time to start the three-probe scanning function exceeds T seconds, the software control system stops scanning, and the host computer 2 obtains the image data of the three probes respectively.

A connecting plate 5 and a supporting plate 6 for supporting the connecting plate are provided on the upper surface of the detection host 1 . One side of the connecting plate 5 is rotatably connected to the detection host 1 and is connected to the host computer 2 by magnetic attraction.

Example 2: Use of a monitoring device for detecting thrombosis

The instrument used in this example is the same as that in Example 1.

Study subjects

The subjects were patients who were bedridden for a long time (>72 hours) in the emergency intensive care unit of Shanghai Sixth People's Hospital. The purpose and methods of this study were explained to the patients, and their consent was obtained and they signed the informed consent form.

The monitor is operated by professional ward physicians or nurses who have received professional ultrasound training and can determine the presence of thrombosis early and in a timely manner.

Operation process

1) Turn on the detection host 1 of the monitoring instrument and connect the detection host 1 to the host computer 2 via wireless.

2) Place the patch probes of the monitor on the corresponding skin surfaces of the femoral vein, popliteal vein and calf muscle vein of the left lower limb of the subject, and use tape to stick and fix the three patch probes to the corresponding positions, and adjust the ultrasound image of the host computer 2 so that its gain and depth are in the optimal image state.

3) The detection host 1 of the monitor is tied around the waist of the subject, so that the subject can realize real-time dynamic monitoring of the ultrasonic images of the lower limb veins no matter lying on the bed or walking, and predict the formation of thrombus at an early stage.

4) Professional ward physicians or nursing staff found precursors of thrombosis in the lower extremity venous ultrasound images: two-dimensional images: increased venous diameter, rough wall, echoes in the lumen, inability to close under pressure, and increase in venous diameter by less than 10% under fatigue maneuvers;

Color Doppler images: The blood flow in the venous lumen cannot be completely filled, and there is no color blood flow enhancement after the probe is pressurized;

Spectral Doppler image: the change of blood flow velocity with respiration disappears, and the fatigue test response disappears.

When the above signs appear in ultrasound images, doctors and nursing staff should report to their superiors in a timely manner and give appropriate drug treatment.

The incidence of left lower limb venous thrombosis is higher than that of the right lower limb, which is 2 to 3 times that of the right side.

In a statistical experiment of 1432 cases, the incidence of left lower limb venous thrombosis was 69.3%, right side accounted for 26.6%, and bilaterally accounted for 4.1%. Therefore, the probe was first placed on the left lower limb to monitor the occurrence of thrombosis.

The incidence of calf muscle vein thrombosis is higher than that of the femoral vein and popliteal vein in the thigh, but the mortality rate of femoral vein and popliteal vein thrombosis is higher than that of the calf muscle vein, and the ultrasound images of the femoral vein and popliteal vein are easier to display. Therefore, we chose to place three patch probes on the corresponding skin surfaces of the femoral vein, popliteal vein and calf muscle vein to monitor the occurrence of thrombosis.

Image examples and interpretation

In two-dimensional conditions:

Under normal circumstances: 1. The walls of the lower limb veins are relatively smooth and continuous, and the sound permeability of the lumen is good; 2. The diameter of the vein can be closed by applying pressure with the probe; 3. The inner diameter of the vein increases by ≥10% under the fatigue maneuver.

In case of thrombosis in the lower extremity veins: 1. The wall of the lower extremity veins is thickened and rough, with a thickness exceeding 2mm, and fine suspended weak echoes, low echoes or high echoes appear in the lumen; 2. The diameter of the vein cannot be closed by pressure applied by the probe. 3. The inner diameter of the vein increases by <10% under fatigue maneuvers.

As shown in Figure 8, where: A: normal circumference common femoral vein cross section, B: normal femoral vein longitudinal section;

Under normal circumstances, the wall of the lower limb veins is relatively smooth and continuous, the lumen is well permeable, the diameter of the veins can be compressed by the probe pressure, and the inner diameter of the veins increases by ≥10% under the fatigue maneuver.

As shown in Figure 9, where: A: longitudinal section of common femoral vein thrombosis, B: cross section of femoral vein thrombosis;

In case of thrombosis in the lower extremity veins: the wall of the lower extremity veins is thickened, real echoes appear in the lumen, the diameter of the vein cannot be closed by pressure with probe pressure, and the inner diameter of the vein increases by <10% under fatigue maneuvers

Under color Doppler conditions:

Under normal circumstances: 1. The blood flow in the veins of the lower limbs is well filled; 2. Manual compression of the distal limbs will enhance the color filling of the venous blood flow.

In the case of thrombosis in the lower limb veins: 1. Partial embolism, there is a filling defect in the lumen of the lower limb veins, discontinuous blood flow filling, and only a narrow blood flow signal filling is seen; complete embolism, there is no blood flow filling in the lower limb veins; 2. Manual compression of the distal limbs, the color filling enhancement of the venous blood flow disappears or weakens.

As shown in Figure 10, A: normal popliteal vein color Doppler image, B: normal femoral vein color Doppler image; Under normal circumstances, the blood flow in the lumen of the lower limb vein is well filled.

As shown in Figure 11, A: Color Doppler image of partial femoral vein embolism: there is a filling defect in the venous lumen, discontinuous blood flow filling, and only a narrow blood flow signal filling is seen; B: Color Doppler image of complete femoral vein embolism: there is no blood flow filling in the lower limb vein

Under spectral Doppler conditions:

Under normal circumstances: 1. The frequency spectrum of the lower limb veins, that is, the blood flow velocity will change with breathing; 2. The blood flow in the fatigue test shows a reverse spectrum, which lasts no more than 0.5s.

In the case of lower limb venous thrombosis: 1. The spectrum of the lower limb veins, that is, the change in blood flow velocity with breathing disappears; 2. The fatigue test reaction disappears.

As shown in FIG12 , A: normal femoral vein spectral Doppler image; B: femoral vein spectral Doppler image when thrombus appears at the proximal end:

Under normal circumstances, the waveform of the lower extremity venous spectrum is affected by respiration, and the amplitude varies;

When thrombus appears at the proximal end of the lower limb vein, the spectral waveform of the lower limb vein disappears with the change of breathing.

The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims (10)

A monitoring system for detecting lower extremity venous thrombosis, comprising: Signal acquisition module and ultrasound hardware system; The signal acquisition module obtains ultrasonic detection data of the inspected part by transmitting and receiving ultrasonic waves between multiple ultrasonic probes and the inspected part, and converts the ultrasonic detection data into analog signals through the 128 channels in the ultrasonic probe and transmits them to the ultrasonic hardware system; The ultrasound hardware system includes a multi-channel selection module, an analog signal processing module, a beamforming module and a host computer module; in Multi-channel selection module: receives 128-channel analog signals output by multiple ultrasonic probes transmitted by the signal acquisition module, and selects one of the 128-channel analog signals output by multiple ultrasonic probes, allowing only the 128-channel analog signal of the selected probe to pass, and transmits the 128-channel analog signal to the analog signal processing module; the selection of multiple ultrasonic detection data is based on the observation requirements of the actual detection site; Analog signal processing module: The selected 128-channel analog signals enter the analog signal processing module. Each analog signal will undergo low-noise amplification, noise reduction filtering, variable gain amplification, and analog-to-digital signal conversion, and finally be converted into digital 128-channel 12-bit channel data and transmitted to the beamforming module; Beamforming module: The digitized 128-channel 12-bit channel data is input into the beamforming module. According to the delay time calculated by the system, each channel data is delayed compensated so that the compensated digitized 128-channel 12-bit channel data are phase-aligned. Then, the 128-channel 12-bit channel data after delay compensation are synthesized into one channel of data by accumulation operation. The synthesized beam signal data is IQ demodulated and low-pass filtered to obtain baseband IQ data within a certain bandwidth range. Perform image preprocessing on the baseband IQ data, including envelope extraction and logarithmic compression, and finally obtain image data that can be displayed. The processed image data is transmitted to the host computer module; Host computer module: The processed digital signal is displayed on the host computer in the form of image data. The monitoring system for detecting lower extremity venous thrombosis according to claim 1 is characterized in that the host computer can be a display. According to a monitoring system for detecting lower extremity venous thrombosis according to claim 1, it is characterized in that: the host computer module interactively controls the ultrasonic hardware system, specifically controls the multi-channel selection module to select the incoming analog signal. According to a monitoring system for detecting lower limb venous thrombosis according to claim 3, it is characterized in that: the host computer module sends commands to the ultrasonic hardware system, thereby controlling the signal acquisition module to acquire signals, and the acquisition method is that the user controls the start of multiple probe scanning functions through the host computer module. According to a monitoring system for detecting lower extremity venous thrombosis as described in claim 1, it is characterized in that: the host computer module sends commands to the ultrasonic hardware system via WIFI, command 1, let the multiplexer only select probe 1, scan for S seconds, rest for G seconds, and the image of probe 1 is uploaded to the host computer in real time, then command 2, let the multiplexer only select probe 2, scan for S seconds, rest for G seconds, and the image of probe 2 is uploaded to the host computer in real time, and finally command 3, let the multiplexer only select probe 3, scan for S seconds, rest for G seconds, and the image of probe 3 is uploaded to the host computer in real time, and then the host computer module controls the multiplexer to switch back to probe 1, and so on, until the time to start the three-probe scanning function exceeds T seconds, the software control system stops scanning, and the host computer module obtains the image data of the three probes respectively. A monitoring device for detecting lower extremity venous thrombosis, comprising: Detection component, detection host (1) and host computer (2), in A detection component, the detection component comprising the signal acquisition module as claimed in claim 1, wherein the ultrasonic detection probe is a patch probe (3), one end of the probe (3) is connected to a data line (4), and is data-connected to a detection host (1) via a plug; The detection host (1) comprises a control mainboard (1008), a heat sink (1006), a power converter (1007) and a housing (1003); in The control mainboard (1008), the heat sink (1006), and the power converter (1007) are placed in the housing (1003). The control mainboard (1008) is loaded with the ultrasonic hardware system as claimed in claim 1, analyzes and processes various data, controls other electrical appliances in the device, and is responsible for information transmission; A host computer (2) is connected to the detection host (1) by signal and is used for displaying relevant images and information. The monitoring device for detecting lower extremity venous thrombosis according to claim 6 is characterized in that: the housing (1003) is connected by a snap-on method so that a cavity is formed inside the detection host. A naked switch (1001) is provided on one side of the housing (1003), which is the power switch of the detection host (1). One side of the housing (1003) is perforated with an interface (1002) for connecting with an external detection device to achieve signal transmission. The detection host (1) is provided with a battery (1005) inside, which is used to supply power to other electrical devices of the device. The monitoring device for detecting lower extremity venous thrombosis according to claim 6 is characterized in that the radiator (1006) is used to dissipate heat from the control main board (8) to prevent it from being overheated. The monitoring device for detecting lower extremity venous thrombosis according to claim 6 is characterized in that the power converter (1007) converts electrical energy during charging so that the electrical energy is stored in the battery (1005). A monitoring device for detecting lower extremity venous thrombosis according to claim 6, characterized in that: a connecting plate (5) and a supporting plate (6) for supporting the connecting plate are provided on the upper surface of the detection host (1), and one side of the connecting plate (5) is rotatably connected to the detection host (1) and is connected to the host computer (2) by magnetic attraction.