Intermittent limb inflating and pressurizing device synchronous with auxiliary ventilation and cardiac cycle

Abstract

The utility model discloses a limb intermittent inflating and pressurizing device synchronous with auxiliary ventilation and cardiac cycle in the technical field of medical appliances and devices, which comprises a pressurizing device host and a limb air bag connected with the pressurizing device host, the limb air bag is bound with the limb of a patient, and a breathing machine is arranged on one side of the limb of the patient. The breathing machine is communicated with a patient breathing channel through a breathing machine pipeline, is electrically connected with a controller arranged in the pressurizing device host through a breathing data transmission line, and transmits breathing data to the controller; an electrode plate of the electrocardio sensor is attached to the chest of a patient, the electrocardio sensor is electrically connected with a controller arranged in the pressurizing device host through a circuit, and electrocardio data is transmitted to the controller through the electrocardio sensor so as to judge the cardiac cycle; the pressurizing device host inflates and deflates the limb air bags according to the cardiac cycle parameters and the breathing data. According to the device, each time of limb vein pump inflation is triggered when the internal pressure of the thoracic cavity of a patient is low, so that the ideal effect of preventing venous thrombosis is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments and devices, in particular to a limb intermittent inflation and pressurization device synchronized with auxiliary ventilation and cardiac cycle. Background Art

[0002] Venous thromboembolism (VTE), which includes deep vein thrombosis (DVT) and pulmonary embolism (PE), is a serious, preventable, life-threatening condition. In 2021, my country included "increasing the standardized prevention rate of VTE" among the top ten national healthcare quality and safety improvement goals. Critically ill patients often have high-risk factors for VTE, such as mechanical ventilation (invasive and non-invasive), sedative use, and central venous catheters. Studies have shown that the incidence of VTE in mechanically ventilated patients in intensive care units can be as high as 31%.

[0003] Prevention of venous thromboembolism generally includes drug anticoagulation and mechanical prevention. In critically ill patients, mechanical prevention is primarily achieved through intermittent limb inflation and compression devices. Intermittent limb inflation and compression devices apply intermittent pressure to the patient's limbs, causing pulsatile acceleration of limb venous blood flow, thereby reducing the risk of venous thrombosis. The effectiveness of intermittent limb inflation and compression devices in increasing venous blood flow is generally affected by factors such as right atrial pressure, intrathoracic pressure, abdominal pressure, limb posture, and venous filling.

[0004] When the heart is in the systole phase, the pressure in the atrium increases, which is not conducive to venous blood return. Therefore, the intermittent pneumatic pressurization device of the limbs is less effective in increasing the venous blood flow rate. When the heart is in the diastole phase, the pressure in the atrium decreases, which is conducive to venous blood return. The intermittent pneumatic pressurization device of the limbs is more effective in increasing the venous blood flow rate and is conducive to the prevention of venous thrombosis.

[0005] For patients who are not using mechanical ventilation, there is negative pressure in the chest cavity during the inspiratory phase and positive pressure in the chest cavity during the expiratory phase. Therefore, the intermittent pneumatic compression device for the limbs is more effective in accelerating blood flow during the inspiratory phase and can better prevent deep vein thrombosis. On the contrary, if the intermittent pneumatic compression device for the limbs is inflated and pressurized during the expiratory phase, because the chest cavity is under positive pressure at this time, it is not conducive to the return of lower limb venous blood to the heart, and the effect of accelerating lower limb venous blood flow is often poor.

[0006] For patients requiring prolonged mechanical ventilation, due to conditions such as respiratory distress or decreased lung compliance, changes in intrathoracic pressure over the respiratory cycle are significantly higher than in patients without respiratory disease. This is also significantly higher than changes in right atrial pressure over the cardiac cycle. Furthermore, the changes in intrathoracic pressure over the respiratory cycle vary depending on the ventilator mode. Ventilators typically use positive pressure ventilation. Bed-assisted ventilation modes can be primarily categorized as controlled ventilation, assisted ventilation, support ventilation, and other modes derived from combinations of the first three. Noninvasive assisted ventilation modes primarily include support ventilation. In the invasive assisted ventilation control ventilation mode, the patient has no spontaneous breathing. During the inspiratory phase, the ventilator sends air to the lungs through a high positive pressure, and the intrathoracic pressure increases; during the expiratory phase, the ventilator reduces the pressure, and the gas in the lungs flows from the lungs to the ventilator, and the intrathoracic pressure drops to a lower level. Therefore, in the controlled ventilation mode, the intrathoracic pressure is lowest at the end of exhalation, and the limb intermittent pneumatic compression device has the best pressurization effect at this time. However, in the inspiratory phase and the early expiratory phase, the chest cavity is in a high-pressure state, and the inflation and pressurization effect of the limb intermittent pneumatic compression device is poor; in the invasive / non-invasive assisted ventilation support ventilation mode, the patient has spontaneous breathing and may even have respiratory distress. In the early inspiratory phase, the strong spontaneous breathing generates a negative pressure in the chest cavity, and the expiratory phase has a positive pressure in the chest cavity. Therefore, the limb intermittent pneumatic compression device has the best blood flow acceleration effect when inflating and pressurizing at the early inspiratory phase. Patients who choose the assisted ventilation mode of invasive assisted ventilation generally have weak but spontaneous breathing. Spontaneous breathing triggers positive pressure delivery from the ventilator, resulting in high intrathoracic pressure during the inspiratory phase and a low pressure at the end of the expiratory phase. At this time, intermittent limb compression devices are most effective at accelerating blood flow through inflation and compression at the end of the expiratory phase. However, some patients who choose the assisted ventilation mode experience respiratory distress and strong spontaneous breathing. In these cases, the changes in intrathoracic pressure are similar to those in the supported ventilation mode, and intermittent limb compression devices are most effective at accelerating blood flow through inflation and compression at the beginning of the inspiratory phase.

[0007] A limb venous pump system synchronized with the limb pulse has been published in the Chinese National Patent Database. Its publication number is CN102579238A, and its publication date is July 18, 2012. The system includes a venous pump unit, ventilation tubing, an extremity airbag, and a pulse sensor. The pulse sensor measures arterial pulse signals from the dorsum of the foot, upper limbs, and other limb areas. Based on these signals, the system adjusts the pulse inflation interval of the extremity airbag, thereby generating pulse pressure to the soles of the feet or palms in sync with the arterial rhythm. This fully utilizes the patient's limb's inherent circulatory capacity, effectively promoting blood circulation and achieving optimal therapeutic effects. Because a patient's respiratory and ventilation status can vary with their state of consciousness, this system only uses cardiac cycle signals, such as pulse signals, to adjust the pulse inflation interval of the limb airbag. However, the patient's respiratory status also affects the pulse signal. Therefore, this system cannot accurately inflate and pressurize the limb airbag according to changes in the ventilator's ventilation mode and respiratory cycle to improve therapeutic effects. Utility Model Content

[0008] The purpose of the utility model is to overcome the defects in the prior art and provide a limb intermittent pneumatic pressurization device that is synchronized with assisted ventilation and cardiac cycle, which is connected to a ventilator through a respiratory data transmission line, and adjusts the interval time of inflation and pressurization of the limb intermittent pneumatic pressurization device in combination with electrocardiogram sensor data to achieve an ideal therapeutic effect.

[0009] The purpose of the utility model is achieved as follows: a limb intermittent inflation and pressurization device synchronized with assisted ventilation and cardiac cycle, comprising a pressurization device host and a limb airbag connected to the pressurization device host, the limb airbag being detachably bound to the patient's limb, a ventilator being arranged on one side of the patient's limb, the ventilator being connected to the patient's respiratory passage via a ventilator pipe, the ventilator being electrically connected to a controller arranged in the pressurization device host via a respiratory data transmission line, and transmitting respiratory data to the controller; an electrocardiogram sensor electrode sheet being applied to the patient's chest surface, the electrocardiogram sensor electrode sheet being electrically connected to an electrocardiogram sensor, the electrocardiogram sensor being electrically connected to a controller arranged in the pressurization device host via a line, and transmitting electrocardiogram data to the controller via the electrocardiogram sensor to determine the cardiac cycle; the pressurization device host inflates and deflates the limb airbag according to cardiac cycle parameters and respiratory data.

[0010] Furthermore, the pressurizing device host includes a controller, a display unit, a pressure sensor, an air pump, a pressure regulator, a command input unit and an alarm unit. The controller controls the inflation and deflation of the air pump based on the preset parameters set by the operator through the command input unit and the respiratory data and cardiac cycle data received through the line; the air pump is used to provide air pressure to the limb airbag, and the opening and closing of the air pump are controlled manually and by the controller system. The air outlet of the air pump is connected to the limb airbag through the ventilation pipe; the respiratory data includes the patient's ventilation mode, flow rate detection data, pressure monitoring data, etc.

[0011] Furthermore, the pressure regulation includes inflation pressure and deflation pressure, wherein the inflation pressure is the highest pressure in the limb airbag during inflation, and the deflation pressure is the lowest pressure in the limb airbag during deflation.

[0012] Furthermore, the pressure sensor is used to monitor the pressure in the limb airbag, and the controller adjusts the operating speed of the air pressure pump so that the air pressure pump reaches the set inflation pressure and deflation pressure.

[0013] Furthermore, the alarm unit triggers an alarm when the controller receives abnormal cardiac cycle signals, respiratory data, and when the total treatment time is reached.

[0014] Furthermore, the limb airbag is tightly bound to the patient's soles, lower limbs or upper limbs through straps. When the limb airbag is rapidly inflated, it can form pulse pressure on the limb, so that the venous blood in the limb obtains pulse acceleration, thereby increasing the blood flow rate and preventing thrombosis.

[0015] When the present invention is working, the operator sets the control mode, auxiliary mode, inflation trigger scheme under the support mode, maximum inflation pressure, inflation frequency (times / minute), total treatment time and other preset parameters on the controller through the command input unit. The controller obtains data from the electrocardiogram sensor, ventilator and pressure sensor through the data line connection. These data can be displayed on the display unit for easy viewing. According to these data, the controller controls the air pressure pump to inflate and deflate the limb airbag and adjusts the pressure, that is, controls the inflation pressure to be the highest pressure in the limb airbag during inflation, and controls the deflation pressure to be the lowest pressure in the limb airbag during deflation. When the alarm condition is triggered, the controller outputs an alarm signal to the alarm unit, and the alarm unit reminds the medical staff. The intermittent inflation and pressurization device of the utility model is connected to the ventilator through a respiratory data transmission line to obtain respiratory mechanics data and transmit it to the controller, and obtains cardiac cycle data through an electrocardiogram sensor and transmits it to the controller. The controller controls the operation of the air pressure pump based on the respiratory mechanics data and cardiac cycle data, and performs pulsed inflation into the limb airbag. The intermittent inflation and pressurization device of the limb maximizes inflation and pressurization when the chest cavity and right atrium pressure are low, so as to achieve the ideal effect of preventing venous thrombosis.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] First, the device can measure the intensity of the patient's inspiratory effort by monitoring the patient's breathing data, and adjust the limb airbags to inflate and deflate according to the intensity. When the limb airbags are inflated rapidly, they can form pulsed pressure on the limbs, thereby causing the venous blood in the limbs to obtain pulsed acceleration, thereby increasing the blood flow rate and achieving the effect of preventing thrombosis.

[0018] Second, the device can trigger corresponding inflation plans according to the patient's different ventilation modes, achieving the purpose of precise inflation and pressurization to improve the treatment effect.

[0019] Third, the device has a simple structure and is easy to set up and use in clinical treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 This is a circuit diagram of the utility model.

[0022] Figure 3 Schematic diagram of the pressure-time curve and flow-rate-time curve in the ventilator pressure control mode, where a is the pressure-time curve measured by the ventilator; b is the flow-rate-time curve measured by the ventilator.

[0023] Figure 4 Schematic diagram of the pressure-time curve and flow-time curve in ventilator-assisted control mode, where a is the pressure-time curve measured by the ventilator; b is the flow-time curve measured by the ventilator; d is the downward shift of the ventilator pressure-time curve baseline caused by the patient's inspiratory effort, which triggers the ventilator to deliver air; e is the patient's inspiratory effort measured by the ventilator's end-expiratory pause function; t is the interval between the patient's start of spontaneous breathing and the lowest point of intrathoracic pressure.

[0024] Figure 5 Schematic diagram of the inflation and deflation cycle of the pressurizing device, where a is the triggered inflation period. During this stage, the pressurizing device triggers the inflation of the limb airbags based on the respiratory signal, cardiac cycle signal and preset setting value; b is the controlled inflation period. If the limb airbags are not inflated during the triggered inflation period, the limb airbags will be pressurized and inflated immediately after entering the triggered inflation period.

[0025] In the above figure, 1 is the main unit of the pressurizing device, 2 is the ventilation tube, 3 is the limb airbag, 4 is the electrocardiogram sensor, 5 is the ventilator, 6 is the ventilator tube, 7 is the respiratory data transmission line, 8 is the controller, 9 is the display unit, 10 is the pressure sensor, 11 is the pressure regulator, 12 is the alarm unit, and 13 is the command input unit. DETAILED DESCRIPTION

[0026] like Figure 1 、 2 The device shown is an intermittent limb inflation and pressurization device synchronized with assisted ventilation and cardiac cycle, comprising a pressurization device main unit 1 and a limb airbag 3 connected to the pressurization device main unit 1. The limb airbag 3 is detachably bound to the patient's limb. A ventilator 5 is provided on one side of the patient's limb. The ventilator 5 is connected to the patient's respiratory passage via a ventilator pipe 6. The ventilator 5 is electrically connected to a controller 8 provided in the pressurization device main unit 1 via a respiratory data transmission line 7 and transmits respiratory data to the controller 8. Electrocardiogram (ECG) sensor 4 electrodes are applied to the patient's chest surface. The ECG sensor 4 electrodes are electrically connected to the ECG sensor 4. The ECG sensor 4 is electrically connected to the controller 8 provided in the pressurization device main unit 1 via a line and transmits ECG data to the controller 8 via the ECG sensor 4 to determine the cardiac cycle. The pressurization device main unit 1 inflates and deflates the limb airbag 3 according to cardiac cycle parameters and respiratory data.

[0027] The main unit 1 of the pressurizing device includes a controller 8, a display unit 9, a pressure sensor 10, an air pump, a pressure regulator 11, a command input unit 13 and an alarm unit 12. The controller 8 controls the inflation and deflation of the air pump based on the preset parameters set by the operator through the command input unit 13 and the respiratory data and cardiac cycle data received through the line; the air pump is used to provide air pressure to the limb airbag 3, and the opening and closing of the air pump are controlled manually and by the controller 8 system. The air outlet of the air pump is connected to the limb airbag 3 through the ventilation pipe 2; the respiratory data includes the patient's ventilation mode, flow rate detection data, pressure monitoring data, etc.

[0028] The pressure regulation 11 includes inflation pressure and deflation pressure. The inflation pressure is the highest pressure in the limb airbag 3 when inflated, and the deflation pressure is the lowest pressure in the limb airbag 3 when deflated.

[0029] The pressure sensor 10 is used to monitor the pressure in the limb airbag 3. The controller 8 adjusts the operating speed of the air pressure pump so that the air pressure pump reaches the set inflation pressure and deflation pressure.

[0030] The alarm unit 12 triggers an alarm when the controller 8 receives abnormal cardiac cycle signals, respiratory data, or when the total treatment time is reached.

[0031] The limb airbag 3 is tightly bound to the patient's soles, lower limbs or upper limbs through a strap. When the limb airbag 3 is rapidly inflated, it can form a pulse pressure on the limb, so that the venous blood in the limb obtains a pulse acceleration, thereby increasing the blood flow rate and preventing thrombosis.

[0032] Example 1: End-expiratory combined ECG inflation triggering scheme for the compression device in controlled ventilation mode

[0033] like Figure 3 As shown, the ventilator 5 can provide flow information (shown in 3b), pressure information (shown in 3a), and ventilation mode information at each time point. In the flow-time waveform, positive flow represents inspiration, and negative flow represents expiration. At the end of expiration, when the negative flow returns to zero, the intrathoracic pressure is at its lowest point in the respiratory cycle, and at this time, the inflation and pressurization of the limb airbag 3 is most effective. If a respiratory flow rate of ≤2 L / min is used as the criterion for determining the end of expiration, the end of expiration generally lasts for about 1 second, typically encompassing one cardiac cycle. Inflation and pressurization of the limb airbag 3 during the diastole phase at the end of expiration can achieve optimal venous blood flow acceleration, thereby achieving the desired effect of preventing venous thrombosis.

[0034] Therefore, in the controlled ventilation mode, the first diastolic electrical signal at the end of expiration (i.e., the electrocardiogram T wave signal) is used as the time node for inflation and pressurization of the limb airbag 3. That is, when the ventilator 5 is in the controlled ventilation mode, if the expiratory flow rate is ≤ the set flow rate (the default parameter is 2 L / min) for more than 0.1 second and the electrocardiogram T wave signal appears, inflation and pressurization are immediately performed; if the expiratory flow rate is always greater than the set flow rate before the next inhalation or the expiratory flow rate is ≤ the set flow rate for more than 0.1 second until the next inhalation phase and no electrocardiogram T wave signal appears, the limb airbag 3 will not be pressurized and inflated during this respiratory cycle.

[0035] If it is inconvenient to place the ECG sensor 4 electrodes on the patient's chest, if ECG signal recognition is poor, or if the patient is experiencing atrial fibrillation, the operator can adjust the end-expiratory combined ECG inflation triggering scheme of the pressurization device in the controlled ventilation mode to the end-expiratory inflation triggering scheme through the command input unit 13. That is, when the ventilator 5 is in controlled ventilation mode, inflation and pressurization will be immediately initiated if the expiratory flow rate is less than or equal to the set flow rate (the default parameter is 2 L / min) for 0.2 seconds.

[0036] Example 2: Early inspiratory triggering scheme of the compression device in supported ventilation mode

[0037] Support ventilation mode is generally used for patients receiving noninvasive, responsible ventilation or invasive, assisted ventilation with strong spontaneous breathing. Spontaneous inspiration in these patients creates a strong intrathoracic negative pressure, making bag inflation most effective at this time. Therefore, in support ventilation, the bag inflation and pressurization start time is set to the scheduled time after inspiration initiation. This time defaults to 0.15 seconds but can also be set by the operator through the command input unit of the pressurization device, based on the time to peak inspiratory effort (t) measured by the ventilator.

[0038] like Figure 4As shown in the figure, the patient's inspiratory effort (e) is measured by the ventilator's end-expiratory pause function. The ventilator can measure the intensity of the inspiratory effort (i.e., the magnitude of the pressure drop), namely the time to peak inspiratory effort t. If the patient's inspiratory effort is too weak, the command input unit can be used to adjust the early inspiratory inflation triggering scheme of the support ventilation mode to the end-expiratory combined ECG inflation triggering scheme, the same as the control ventilation mode, based on clinical needs.

[0039] Example 3: Inflation triggering scheme of the compression device in assisted ventilation mode

[0040] Assisted ventilation mode is typically used in conjunction with controlled ventilation mode for patients receiving sedation and analgesia. Such patients often have weak spontaneous breathing, so the default end-expiratory combined ECG inflation triggering scheme in assisted ventilation mode is the same as that used in controlled ventilation. The operator can measure the intensity of the patient's inspiratory effort using the ventilator's end-expiratory pause function. If the inspiratory effort is excessive, the operator can adjust the end-expiratory combined ECG inflation triggering scheme in assisted ventilation mode to the same early inspiratory inflation triggering scheme as used in support ventilation mode based on clinical needs through the command input unit. For patients with inconvenient chest placement of ECG sensor electrodes, poor ECG signal recognition, or atrial fibrillation, the operator can adjust the end-expiratory combined ECG inflation triggering scheme in assisted ventilation mode to the end-expiratory inflation triggering scheme through the command input unit. Specifically, when the ventilator is in assisted ventilation mode, inflation is initiated immediately if the expiratory flow rate is ≤ the set flow rate (default parameter is 2 L / min) for 0.2 seconds.

[0041] Example 4: Control Mode of the Pressurizing Device During the Inflation and Deflating Cycle

[0042] like Figure 5 As shown in the figure, the inflation and deflation cycle of the compression device consists of a triggered inflation period (a) and a controlled inflation period (b). Alternating inflation and deflation of the left and right limbs prevents the sudden increase in venous return that can occur with simultaneous inflation of the airbags in both limbs, which can lead to congestive heart failure. It also ensures that the limb veins have sufficient time to refill after the limb airbags are deflated. During the trigger inflation phase of the inflation / deflation cycle (left), the pressurizing device triggers inflation of the left limb airbag based on respiratory signals, cardiac cycle signals, and preset settings. Inflation stops when the preset pressure is reached, and the pressure is maintained for 1 second before deflation to the preset pressure. The airbag remains at a low pressure until the next inflation / deflation cycle (left). If the left limb airbag is not triggered during the trigger inflation phase of the inflation / deflation cycle (left), the limb airbag is immediately pressurized and inflated during the controlled inflation phase of the inflation / deflation cycle (left). Inflation stops when the preset pressure is reached, and the pressure is maintained for 1 second before deflation to the preset pressure. The airbag remains at a low pressure until the next inflation / deflation cycle (left). The inflation / deflation cycle (right) controls the inflation / deflation of the right limb airbag, using the same protocol as the inflation / deflation cycle (left).

[0043] During operation, the intermittent pneumatic compression device of the present invention uses a strap to attach the limb airbag 3 to the patient's foot, lower limb, or upper limb. A respiratory data transmission line 7 connects the ventilator 5 to the compression device main unit 1, transmitting relevant respiratory data to the compression device main unit 1's controller 8. Electrodes of the electrocardiogram (ECG) sensor 4 are attached to the patient's chest surface. The ECG sensor 4 is connected to the compression device main unit 1 via a line, transmitting cardiac cycle signals to the compression device main unit 1's controller. During operation, the compression device main unit 1 is turned on, and parameters such as the inflation triggering scheme, maximum inflation pressure, inflation frequency (times / minute), and total treatment time for the control mode, auxiliary mode, and support mode are set through the command input unit 13 according to clinical needs. After initiating intermittent pneumatic compression therapy, the compression device main unit 1 inflates and deflates the corresponding limb airbag 3 once during each inflation / deflation cycle based on the respiratory data transmitted by the ventilator 5, the cardiac cycle data transmitted by the ECG sensor 4, and preset parameters.

[0044] The pressure in the limb airbags 3 is monitored by the pressure sensor 10, and the controller 8 automatically adjusts the operating speed of the air pump based on the previous operating conditions to achieve the set inflation pressure and deflation pressure; this cycle continues, and after the total treatment time is reached, the bilateral limb airbags 3 remain in the deflated state, and the alarm unit is triggered to remind medical staff that the treatment is over.

[0045] The alarm unit is triggered as follows: First, the operator selects the end-expiratory combined with ECG inflation trigger scheme, and the controller does not receive cardiac cycle signals for one minute during operation, or the ECG sensor cannot recognize the ECG T wave signal, or the ECG sensor recognizes the ECG signal as an atrial fibrillation signal; Second, the controller does not receive a respiratory signal for more than one minute during operation; Third, the operator selects the end-expiratory combined with ECG inflation trigger scheme or the operator selects the end-expiratory inflation trigger scheme, and the expiratory flow rate cannot be ≤ the set flow rate (the default parameter is 2 L / min) for one consecutive minute and maintained for more than 0.2 seconds; Fourth, the total treatment time is reached.

[0046] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, technicians in this field can make some substitutions and deformations of some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A limb intermittent inflation and pressurization device synchronized with assisted ventilation and cardiac cycle, comprising a pressurization device main unit and a limb airbag connected to the pressurization device main unit, characterized in that: The limb airbag is detachably tied to the patient's limb, and a ventilator is arranged on one side of the patient's limb. The ventilator is connected to the patient's respiratory channel through a ventilator pipe. The ventilator is electrically connected to a controller arranged in the pressurizing device host through a respiratory data transmission line, and transmits respiratory data to the controller; an ECG sensor electrode sheet is applied to the patient's chest surface, and the ECG sensor electrode sheet is electrically connected to the ECG sensor. The ECG sensor is electrically connected to the controller arranged in the pressurizing device host through a line, and transmits ECG data to the controller through the ECG sensor to determine the cardiac cycle; the pressurizing device host inflates and deflates the limb airbag according to the cardiac cycle parameters and respiratory data.

2. The intermittent pneumatic pressurization device for limbs synchronized with assisted ventilation and cardiac cycle according to claim 1, characterized in that: The main body of the pressurizing device includes a controller, a display unit, a pressure sensor, an air pump, a pressure regulator, a command input unit and an alarm unit. The controller controls the inflation and deflation of the air pump based on the preset parameters set by the operator through the command input unit and the respiratory data and cardiac cycle data received through the line. The air pump is used to provide air pressure to the limb airbag. The opening and closing of the air pump is controlled manually and by the controller system. The air outlet of the air pump is connected to the limb airbag through a ventilation pipe.

3. The intermittent pneumatic pressurization device for limbs synchronized with assisted ventilation and cardiac cycle according to claim 2, characterized in that: The pressure regulation includes inflation pressure and deflation pressure. The inflation pressure is the highest pressure in the limb airbag during inflation, and the deflation pressure is the lowest pressure in the limb airbag during deflation.

4. The intermittent pneumatic pressurization device for limbs synchronized with assisted ventilation and cardiac cycle according to claim 2, characterized in that: The pressure sensor is used to monitor the pressure in the limb airbag, and the controller adjusts the running speed of the air pressure pump to enable the air pressure pump to reach the set inflation pressure and deflation pressure.

5. The intermittent pneumatic pressurization device for limbs synchronized with assisted ventilation and cardiac cycle according to claim 2, characterized in that: The alarm unit triggers an alarm when the controller receives abnormal cardiac cycle signals, respiratory data, and reaches the total treatment time.

6. The intermittent pneumatic pressurization device for limbs synchronized with assisted ventilation and cardiac cycle according to claim 1, characterized in that: The limb airbag is tightly bound to the patient's soles, lower limbs or upper limbs through a strap. When the limb airbag is rapidly inflated, it can form a pulsed pressure on the limb, so that the venous blood in the limb obtains a pulsed acceleration, thereby increasing the blood flow rate and preventing thrombosis.

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