Medical inflating device and inflating method thereof

Abstract

The invention provides a medical inflation device. The medical inflation device comprises an air storage chamber, a constant pressure chamber, a pressure detection module and a plurality of airflow control modules. The air inlet end of the constant pressure chamber is connected with the air outlet end of the air storage chamber through a first controllable flow path, and the air outlet end of the constant pressure chamber is a cuff air supply outlet; the gas inlet end of the gas storage chamber is connected with various gas sources through a second controllable flow path; the air outlet end of the constant pressure chamber is also connected with external atmosphere through a third controllable flow path; airflow control modules are arranged on the first controllable flow path, the second controllable flow path and the third controllable flow path; the airflow control module is used for regulating and controlling airflow on-off and flow; the system has the functions of multi-gas-source redundancy, real-time detection and correction and gas safety guarantee, and the pressure of the cuff can be automatically adjusted in real time through pressure feedback.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical supplies, in particular to a medical inflation device and an inflation method thereof. BACKGROUND

[0002] In the field of medical inflation devices, the precise control of cuff pressure and the continuity of gas supply are crucial to ensure the safety of clinical treatment. In the prior art, for example, patent CN215309154U discloses an electric inflation device and a pressurizing bag, which adopts a dual-mode switching design of a gas pump and a manual balloon, and realizes basic inflation function through an inflation pipeline. However, the device does not have a pressure sensor, lacks real-time pressure feedback and dynamic adjustment capability, and the gas source switching completely relies on manual operation, which cannot cope with sudden gas source failures and has insufficient pressure control accuracy.

[0003] Another recent patent CN202421922064.2 discloses a multi-cavity tube balloon esophageal muscle training device that can be inflated and deflated, which realizes automatic inflation and deflation control of the balloon through a built-in air pump and a solenoid valve, and supports reciprocating inflation and deflation mode, and has made certain progress in the field of esophageal function rehabilitation. Although this technology solves the problem of cumbersome manual operation, it still does not have a real-time pressure sensor, and the pressure control is one-way according to the preset instructions, which cannot adjust the control strategy according to the pressure deviation. Therefore, it is an urgent need in the field to develop a medical inflation device with real-time pressure detection and correction, multiple gas source redundancy, and safety guarantee function. SUMMARY

[0004] In order to overcome the problems in the prior art, the purpose of the present application is to provide a medical inflation device and an inflation method thereof, which can have multiple gas source redundancy and guarantee gas safety function, and can automatically adjust the cuff pressure in real time through pressure feedback.

[0005] To achieve the above-mentioned purpose, the present application provides a medical inflation device, which comprises a gas storage chamber, a constant pressure chamber, a pressure detection module, a central controller and a plurality of airflow control modules. The gas inlet end of the constant pressure chamber is connected to the gas outlet end of the gas storage chamber through a first controllable flow path, and the first gas outlet end of the constant pressure chamber is a cuff gas supply outlet. The gas inlet end of the gas storage chamber is selectively connected to multiple gas sources through a second controllable flow path. The second gas outlet end of the constant pressure chamber is connected to the external atmosphere through a third controllable flow path. The first controllable flow path, the second controllable flow path and the third controllable flow path are each provided with an airflow control module; the airflow control module is used to regulate the on-off and flow rate of the airflow. The pressure detection module comprises a first pressure sensor for monitoring the constant pressure chamber and a second pressure sensor for monitoring the gas storage chamber. The central controller is electrically connected with the airflow control module and the pressure detection module, and is configured to acquire pressure data of the pressure detection module in real time and control the airflow control module based on pressure feedback to realize inflation, deflation and dynamic pressure maintenance of the cuff.

[0006] Further, the second controllable flow path includes a first air inlet path, a second air inlet path and a third air inlet path. The first air inlet path has a centralized air supply air inlet at the air inlet end and is connected with the air storage chamber at the air outlet end. The second air inlet path has an external air pump air supply air inlet at the air inlet end and is connected with the air storage chamber at the air outlet end. The third air inlet path has an internal air pump air supply air inlet at the air inlet end and is connected with the air storage chamber at the air outlet end through the internal air pump, and the internal air pump provides air inlet power. The airflow control module is arranged between the air storage chamber and the centralized air supply air inlet, between the air storage chamber and the external air pump air inlet, and between the air storage chamber and the internal air pump.

[0007] Further, a first purification chamber is arranged between the external air pump air inlet and the air storage chamber, and a second purification chamber is arranged between the internal air pump and the air storage chamber.

[0008] Further, one end of the third controllable flow path is connected with the air outlet end of the constant pressure chamber, and the other end is connected with the external atmosphere through the internal air pump air supply outlet of the internal air pump, and the internal air pump provides exhaust power; the airflow control module on the third controllable flow path is arranged between the constant pressure chamber and the internal air pump.

[0009] Further, a first airflow on-off element is arranged near the internal air pump air supply outlet in the third controllable flow path, a second airflow on-off element is arranged near the internal air pump air supply inlet in the third air inlet path, and a third airflow on-off element is arranged near the second purification chamber air inlet end on the third air inlet path.

[0010] Further, the device further includes a control panel, a data module and a power module. The data module is electrically connected with the central controller and is used for realizing real-time transmission of pressure data and control commands. The control panel is electrically connected with the central controller and is used for displaying device states and receiving user input operation instructions. The heat dissipation system is arranged inside the device and is used for dissipating heat of the internal air pump and the central controller. The power module supplies power to each electrical component.

[0011] Further, the gas flow control module comprises an electromagnetic valve for controlling the on-off of the gas flow and a gas mass flow controller for regulating the gas flow rate; the first gas flow on-off element and the second gas flow on-off element are both electromagnetic valves for controlling the on-off of the gas flow.

[0012] The application further provides a gas supply method of a medical inflation device, which is applied to the medical inflation device and comprises the following steps: S1: selecting a gas source through a control panel; S2: selecting an expansion mode through the control panel and configuring the gas flow rate parameter and the pressure parameter in the mode; S3: starting the gas flow control module on the air inlet passage corresponding to the gas source, and the gas first enters the gas storage chamber; when the pressure in the gas storage chamber reaches the set value, the gas flow control module on the air inlet passage is closed, the gas flow control module between the gas storage chamber and the constant pressure chamber is started, the gas is inflated to the cuff through the constant pressure chamber, when the pressure in the constant pressure chamber reaches the target pressure, the gas flow control module between the gas storage chamber and the constant pressure chamber is closed, and thus the inflation of the cuff is completed; S4: monitoring the pressure value in the constant pressure chamber in real time, and dynamically supplementing, discharging or timing supplementing the gas in the constant pressure chamber according to the preset pressure value feedback.

[0013] Further, the expansion mode comprises rapid expansion, slow expansion, gradual expansion or reciprocating expansion; The gas flow rate in the rapid expansion mode and the slow expansion mode is set as a fixed value; The gas flow rate in the gradual expansion mode is set as a multi-stage stepped increase, and each stage is maintained for a set time; The reciprocating expansion mode is preset with a number of expansion times, and the inflation and discharge are alternated according to the preset number of expansion times.

[0014] Further, in step S1, the method for judging the validity of the gas source connection is that: a set detection time is preset, the second pressure sensor monitors and feeds back the pressure in the gas storage chamber, if the pressure in the gas storage chamber is detected to rise within the set detection time, it is considered that the gas source connection is valid; otherwise, it is considered that the gas source connection is abnormal; when the gas source connection is abnormal, the other gas source type is automatically switched to, and when the gas source is an external air pump or an internal air pump, the corresponding gas purification chamber on the air inlet passage is started synchronously; In step S3, the method for judging whether the cuff is damaged is that: after the cuff is inflated, if the first pressure sensor in the constant pressure chamber does not detect that the pressure reaches a pressure threshold value within a preset time, or the decay amplitude exceeds a decay threshold value within p minutes after the pressure threshold value is reached, it is determined that the cuff is damaged; when the cuff damage is detected, an alarm is triggered and the abnormal information is transmitted online.

[0015] The application integrates multiple gas source architectures, can monitor the gas source pressure state in real time through the central controller, and switch the gas source when abnormal; through the cooperation of the pressure detection module and multiple gas flow control modules, the cuff pressure is monitored in real time and the air intake and exhaust is automatically controlled, and the cuff is accurately pressure regulated. Microorganisms, dust and other impurities in the gas are filtered through the gas purification chamber to ensure the safety of the filled gas; the application can support the self-defined setting of parameters such as pressure value, inflation flow, and maintenance time, so that the device can set multiple expansion modes when used, breaking through the limitation of single scene in the prior art; the application effectively improves the gas source reliability, pressure precision regulation and safety protection of the inflation device. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A medical inflation device structure schematic diagram provided for embodiment 1 of the application; Figure 2 A medical inflation device electrical control module schematic diagram provided for embodiment 1 of the application; BRIEF DESCRIPTION OF DRAWINGS: 101, constant pressure chamber; 102, gas storage chamber; 103, first purification chamber; 104, second purification chamber; 201, power module; 202, heat dissipation system; 203, central controller; 204, control panel; 205, data module; 206, sub-controller; 207, silent air pump; 211, first electromagnetic valve; 212, second electromagnetic valve; 213, third electromagnetic valve; 214, fourth electromagnetic valve; 215, fifth electromagnetic valve; 216, sixth electromagnetic valve; 217, seventh electromagnetic valve; 218, eighth electromagnetic valve; 221, first pressure sensor; 222, second pressure sensor; 231, first gas mass flow controller; 232, second gas mass flow controller; 233, third gas mass flow controller; 234, fourth gas mass flow controller; 235, fifth gas mass flow controller; 301, centralized gas supply air inlet; 302, external air pump gas supply air inlet; 303, built-in air pump gas supply air inlet; 304, built-in air pump gas supply air outlet; 305, cuff gas supply air outlet. DETAILED DESCRIPTION

[0017] Embodiment one The embodiment is to provide a medical inflation device, the structure schematic diagram of which is as shown in Figure 1 The medical inflation device includes a hardware module for gas processing and storage and an electrical control module for control and monitoring.

[0018] The hardware module comprises the gas storage chamber 102, the constant pressure chamber 101 and the gas flow control module; the gas flow control module comprises the first electromagnetic valve 211, the second electromagnetic valve 212, the third electromagnetic valve 213, the seventh electromagnetic valve 217 and the eighth electromagnetic valve 218 for controlling the on-off of the gas flow, and the first gas mass flow controller 231, the second gas mass flow controller 232, the third gas mass flow controller 233, the fourth gas mass flow controller 234 and the fifth gas mass flow controller 235 for regulating the gas flow.

[0019] The first gas outlet end of the constant pressure chamber 101 is the air supply outlet 305 for the cuff, which is connected with the air inside the cuff. The air inlet end of the constant pressure chamber 101 is connected with the air outlet end of the gas storage chamber 102 through the first controllable flow path, and the eighth electromagnetic valve 218 and the fourth gas mass flow controller 234 are arranged on the first controllable flow path. The eighth electromagnetic valve 218 is used for controlling the on-off of the air supply from the gas storage chamber 102 to the constant pressure chamber 101, and the fourth gas mass flow controller 234 is used for controlling the gas pressure and flow rate during air supply, so as to avoid overpressure and overhigh flow rate to cause the cuff to be inflated.

[0020] The second gas outlet end of the constant pressure chamber 101 is connected with the external atmosphere through the third controllable flow path. Specifically, one end of the third controllable flow path is connected with the gas outlet end of the constant pressure chamber 101, and the other end is connected with the external atmosphere through the built-in air pump air supply outlet 304 and the built-in air pump. The built-in air pump provides the exhaust power. The built-in air pump can be selected from a diaphragm air pump and a silent air pump. In this embodiment, the built-in air pump is selected as the silent air pump 207, and the first gas flow on-off element is arranged in the third controllable flow path close to the built-in air pump air supply outlet 304. The first gas flow on-off element can be selected from a ball valve and an electromagnetic valve. In this embodiment, the first gas flow on-off element is selected as the fifth electromagnetic valve 215.

[0021] The seventh electromagnetic valve 217 and the fifth gas mass flow controller 235 are further arranged between the constant pressure chamber 101 and the silent air pump 207. The seventh electromagnetic valve 217 and the fifth gas mass flow controller 235 are used for controlling whether the gas in the cuff is exhausted and the pressure and flow rate of the gas.

[0022] The air inlet end of the gas storage chamber 102 is connected with multiple gas sources through the second controllable flow path. In this embodiment, three kinds of gas sources are preferred, including an external gas source and an internal gas source. The external gas source comprises a hospital centralized air supply and an external air pump air supply, and the internal gas source is the air supply of the silent air pump 207. Correspondingly, the second controllable flow path comprises a first air inlet path, a second air inlet path and a third air inlet path. The three kinds of gas sources are connected to the gas storage chamber 102 through the three air inlet paths. The gas storage chamber 102 can be selected to have a gas storage capacity of 500ml-1000ml.

[0023] The first air intake passage has an air intake end that is a centralized air supply inlet 301 and an air outlet end that is connected to a gas storage chamber 102. A first solenoid valve 211 and a first gas mass flow controller 231 are provided between the gas storage chamber 102 and the centralized air supply inlet 301.

[0024] The second air intake passage has an air intake end that is an external air pump supply air inlet 302 and an air outlet end that is connected to the air storage chamber 102. A first purification chamber 103 is provided between the air storage chamber 102 and the external air pump supply air inlet 302. A second solenoid valve 212 and a second gas mass flow controller 232 are provided between the first purification chamber 103 and the air storage chamber 102.

[0025] The third air intake passage has an air intake port 303 for a built-in air pump at its intake end, and an exhaust end connected to the air storage chamber 102 via a silent air pump 207. The silent air pump 207 provides the air intake power; a second airflow cut-off element is provided in the third air intake passage near the air intake port 303 of the built-in air pump. In this embodiment, the second airflow cut-off element is a sixth solenoid valve 216. A second purification chamber 104 is provided between the air storage chamber 102 and the silent air pump 207, and a third solenoid valve 213 and a third gas mass flow controller 233 are provided between the second purification chamber 104 and the air storage chamber 102; a third airflow cut-off element is provided near the air intake end of the second purification chamber, and in this embodiment, the third airflow cut-off element is a fourth solenoid valve 214. When the built-in air pump supplies air, the fourth solenoid valve 214 is open; when the built-in air pump exhausts air, the fourth solenoid valve 214 is closed.

[0026] The first purification chamber 103 and the second purification chamber 104 are used to filter dust, microorganisms, bacteria, etc. from the air to prevent contaminated gas from being accidentally delivered to patients during use. The hospital's centralized gas supply already meets medical standards, so there is no need to design a purification chamber for the first air intake passage.

[0027] The electrical control module, such as Figure 2 As shown, the system includes a central controller 203 and a pressure detection module. The pressure detection module includes a first pressure sensor 221 and a second pressure sensor 222. The first pressure sensor 221 monitors the pressure inside the constant pressure chamber 101; the second pressure sensor 222 monitors the pressure inside the gas storage chamber 102. The signal output terminals of the first pressure sensor 221 and the second pressure sensor 222 are connected to the signal input terminals of the central controller 203. The central controller 203 is electrically connected to the pressure detection module and multiple airflow control modules. The central controller 203 is configured to acquire pressure data from the pressure detection module in real time and control the airflow control modules based on pressure feedback to achieve inflation, deflation, and dynamic pressure maintenance of the gas storage chamber.

[0028] The electrical control module also includes a control panel 204, a data module 205, a sub-controller 206, a heat dissipation module 202, and a power supply module 201.

[0029] The data module 205 is electrically connected to the central controller 203 and is used for data processing and real-time transmission of pressure data and control commands.

[0030] The control panel 204 is electrically connected to the central controller 203 and is used to display the device status and receive operation commands input by the user.

[0031] The sub-controller 206 is electrically connected to the central controller 203. The central controller 203 indirectly controls the start and stop of the silent air pump 207, the first cleanroom 103, the second cleanroom 104, the first solenoid valve 211, the second solenoid valve 212, the third solenoid valve 213, the fourth solenoid valve 214, the fifth solenoid valve 215, the sixth solenoid valve 216, the seventh solenoid valve 217, and the eighth solenoid valve 218 by sending control signals to the sub-controller 206. It also regulates the first gas mass flow controller 231, the second gas mass flow controller 232, the third gas mass flow controller 233, the fourth gas mass flow controller 234, and the fifth gas mass flow controller 235. The sub-controller 206 and the central controller 203 form a master-slave control architecture. The central controller provides a unified management interface and decision support, which facilitates global monitoring and scheduling of the entire system. The sub-controller can process the instructions of the field equipment nearby, which is convenient for wiring and installation, and achieves efficient system coordination. Alternatively, a centralized control scheme can be adopted, in which the central controller 203 directly connects to and manages the aforementioned controlled execution devices, which can also achieve functions such as dynamic control of cuff pressure, timed inflation, and active deflation.

[0032] The heat dissipation system 202 is used to dissipate heat from components such as the silent air pump 207, the central controller 203, and the sub-controller 206.

[0033] The power module 201 supplies power to the various electrical components of the device.

[0034] Example 2 This embodiment provides an inflation method for a medical inflation device, used to implement the medical inflation device shown in Embodiment 1 above. Specifically, this embodiment uses an external air pump to supply air to the cuff. The method includes the following steps: S1: Select the gas source via the control panel.

[0035] It also verifies the validity of the gas source connection. If the gas source connection is abnormal, it automatically switches to other gas source types. When the gas source is supplied by an external air pump or an internal air pump, the gas purification chamber of the corresponding air intake passage is started simultaneously.

[0036] Specifically, the medical inflation device is connected to an external power source, and the user configures the air source and inflation parameters through the control panel 204; in this embodiment, an external air pump is selected as the air source.

[0037] More preferably, the device can also automatically determine the validity of the gas source connection. The method for determining the validity of the gas source connection is as follows: the central controller 203 controls the second solenoid valve 212 and the second gas mass flow controller 232 of the second air intake passage to open. Since an external air pump is selected as the gas source, the central controller 203 simultaneously starts the first purification chamber 103 to filter and disinfect the gas entering the gas storage chamber 102. The second pressure sensor 222 provides real-time feedback on the pressure of the gas storage chamber 102. If an increase in the pressure of the gas storage chamber 102 is detected within 10 seconds, the gas source connection is considered valid; if no pressure increase is detected within 10 seconds, the gas source is determined to be disconnected, and the central controller 203 automatically switches to the built-in air pump supply mode of the third air intake passage. During the switching process, the central controller 203 first closes the second solenoid valve 212 and the second gas mass flow controller 232 of the second air intake passage, and then opens the fourth solenoid valve 214, the sixth solenoid valve 216, the third solenoid valve 213 and the gas mass flow controller 233 of the third air intake passage, while simultaneously starting the second cleanroom 104 and the silent air pump 207.

[0038] S2: Select the expansion mode via the control panel and configure the gas flow and pressure parameters for this mode.

[0039] Specifically, after confirming the air source connection is valid, the doctor connects the cuff inflation valve of the endotracheal tube to the cuff air supply outlet 305 of the device. By selecting the "rapid expansion" mode through the control panel 204, the doctor can set the pressure and inflation parameters according to their application needs, or use the default settings corresponding to the selected expansion mode. In this embodiment, the preferred settings are a cuff target pressure of 25 cmH2O, an inflation flow rate of 3 L / min, and a pre-inflation pressure of 0.4 MPa for the gas storage chamber 101.

[0040] S3: Turn on the airflow control module on the air intake path corresponding to the gas source, and the gas first enters the gas storage chamber 102; when the pressure in the gas storage chamber 102 reaches the set value, turn off the airflow control module on the corresponding air intake path, and turn on the airflow control module between the gas storage chamber 102 and the constant pressure chamber 101. The gas inflates the bladder through the constant pressure chamber 101. When the first pressure sensor 221 detects that the pressure in the constant pressure chamber 101 has reached the target pressure, turn off the airflow control module between the gas storage chamber 102 and the constant pressure chamber 101. The bladder inflation is thus completed.

[0041] Specifically, in this embodiment, the central controller 203 controls the opening of the second solenoid valve 212 and the second gas mass flow controller 232 on the second air intake passage. Compressed air output from the external air pump enters the gas storage chamber 102 after being processed by the first purification chamber 103. The second pressure sensor 222 provides real-time pressure feedback. When the pressure inside the gas storage chamber 102 reaches 0.4 MPa, the central controller 203 closes the second solenoid valve 212 and the second gas mass flow controller 232 on the second air intake passage, and simultaneously opens the eighth solenoid valve 218 and the fourth gas mass flow controller 234 on the first controllable flow path. The fourth gas mass flow controller 234 sets the flow rate to 3 L / min to inflate the constant pressure chamber 101 and the bladder. When the first pressure sensor 221 detects that the pressure inside the constant pressure chamber 101 reaches 25 cmH2O, the pressure inside the constant pressure chamber 101 also represents that the pressure of the air bladder has reached the target pressure. The central controller 203 then closes the eighth solenoid valve 218 and the fourth gas mass flow controller 234 on the first controllable flow path, completing the rapid inflation of the bladder.

[0042] When the user selects the "slow expansion" mode, the process is the same as the fast expansion in this embodiment, except that the flow rate of the fourth gas mass flow controller 234 is adjusted to 1L / min.

[0043] Simultaneously, the system determines whether the cuff is damaged based on the pressure value fed back by the first pressure sensor 221. If so, an alarm is triggered and the abnormal information is transmitted over the network. The method for determining whether the cuff is damaged is as follows: after the cuff is inflated, if the first pressure sensor 221 detects that the cuff pressure decreases by more than a certain threshold within p minutes, the cuff is determined to be damaged. For example, after rapid inflating the cuff, if the first pressure sensor 221 detects a pressure decrease of >15% within 30 seconds, the cuff is determined to be abnormal. Then, the "cuff damaged" prompt information is transmitted to the control panel 204 via the data module 205, and the control panel 204 displays a text prompt.

[0044] S4: Real-time monitoring of the pressure value in the constant pressure chamber 101, and dynamic replenishment, exhaust, or timed replenishment of air in the constant pressure chamber 101 according to the preset pressure value.

[0045] The central controller 203 activates the respiratory rate acquisition function. The first pressure sensor 221 captures the pressure changes of the cuff in real time. The preset inflator pressure threshold is 22 cmH2O and the exhaust pressure threshold is 28 cmH2O. If the first pressure sensor 221 detects that the cuff pressure is lower than the inflator threshold, the central controller 203 automatically opens the second solenoid valve 212, the second gas mass flow controller 232 on the second intake passage, and the eighth solenoid valve 218 and the fourth gas mass flow controller 234 on the first controllable flow path to inflate the cuff. If the pressure is higher than the exhaust threshold, the seventh solenoid valve 217, the fifth gas mass flow controller 235, the silent air pump 207, and the fifth solenoid valve 215 on the third controllable flow path are automatically opened to exhaust the air and maintain dynamic pressure stability.

[0046] Example 3 The difference from Embodiment 2 is that this embodiment uses a built-in air pump for inflation and replenishes the air supply to the bladder at regular intervals.

[0047] In step S1, the air source in this embodiment is a built-in air pump for inflation.

[0048] In step S3, the central controller 203 controls the opening of the fourth solenoid valve 214, the third solenoid valve 213, the third gas mass flow controller 233, the sixth solenoid valve 216, and the silent air pump 207 on the third air intake passage, simultaneously activating the second purification chamber 104 to filter and disinfect the gas entering the gas storage chamber 102. The compressed air output by the built-in air pump enters the gas storage chamber 102 after being processed by the second purification chamber 104, and the second pressure sensor 222 provides real-time pressure feedback. The gas flow from the gas storage chamber to the constant pressure chamber is the same as in Embodiment 2 and will not be described again.

[0049] In step S4, after the device inflates the cuff, the central controller 203 starts a timer with a preset pressure difference threshold of 5 cmH2O. The first pressure sensor 221 monitors the cuff pressure in real time. When the countdown ends, it determines whether to replenish air by analyzing the pressure changes before and after the countdown. If the cuff pressure after the countdown is higher than the pressure before the countdown by 5 cmH2O, air needs to be released; if the cuff pressure after the countdown is lower than the pressure before the countdown by 5 cmH2O, air needs to be replenished; if the pressure difference before and after the countdown is less than 5 cmH2O, air replenishment is not required, and the cycle continues. During the countdown, the first pressure sensor also monitors the cuff pressure in real time. If the pressure falls below the threshold during the countdown, the device will provide a text prompt through the control panel 204 and, after a period of waiting, will default to replenishing air.

[0050] Step S2 is the same as in Example 2, and will not be repeated here.

[0051] The difference between this embodiment and Embodiment 2 in that the constant pressure chamber 101 is dynamically replenished, vented, or timed replenished with air based on a preset pressure value is that Embodiment 2 adjusts the pressure based on the highest or lowest pressure threshold of the cuff to maintain the pressure value inside the cuff within a normal range. This embodiment, however, uses the pressure value of the cuff immediately after inflation as the optimal state pressure value, and then adjusts the cuff based on this optimal state pressure value to maintain pressure stability within the cuff, placing greater emphasis on fine-tuning and stabilization.

[0052] Example 4 The difference from Example 2 is that the expansion mode selected in this embodiment is "reciprocating expansion".

[0053] In step S2, the expansion mode is selected as "reciprocating expansion", the number of expansions is set to 5, and the target pressure is 28 cmH2O; In step S3, gas is pumped from the gas storage chamber 102 into the constant pressure chamber 101. The first pressure sensor 221 monitors the pressure, and pumping stops when the target pressure of 28 cmH2O is reached. Then, the central controller 203 opens the seventh solenoid valve 217, the fifth gas mass flow controller 235, the fifth solenoid valve 215, and the silent air pump 207 on the third controllable flow path to start venting, reducing the pressure of the bladder to 15 cmH2O, completing one reciprocating expansion cycle.

[0054] Repeat the inflation and deflation process 5 times. After the reciprocating expansion is completed: if the balloon needs to be used again, perform step S4 for real-time dynamic pressure control; if it does not need to be used again, deflate the balloon through the third controllable flow path and remove it from the human body. At this time, step S4 is not required.

[0055] Steps S1 and S4 are the same as in Example 2, and will not be repeated here.

[0056] Example 5 The difference from Embodiment 2 is that this embodiment adopts a "progressive expansion" mode, which inflates in stages to avoid the balloon rupture due to instantaneous high pressure, while precisely controlling the degree of expansion.

[0057] In step S2, the expansion mode is selected as "progressive expansion" and multiple inflation stages are set. In this embodiment, three inflation stages are preferably set, namely: Phase 1: Target pressure 15 cmH2O, flow rate 1.2 L / min, maintained for 20 seconds; Phase 2: Target pressure 22 cmH2O, flow rate 1.0 L / min, maintained for 30 seconds; Phase 3: Target pressure 28 cmH2O, flow rate 0.8 L / min, maintained for 40 seconds.

[0058] In step S3, the central controller 203 controls the airflow to fill the constant pressure chamber 101 according to the parameters of stage 1. After the first pressure sensor 221 reaches 15 cmH2O, it maintains it for 20 seconds. During this period, the second pressure sensor monitors the pressure of the gas storage chamber 102 and keeps it stable at 0.4 MPa.

[0059] After stage 1 is completed, the system automatically switches to stage 2 parameters, reducing the flow rate to 1.0 L / min, inflating to 22 cmH2O and maintaining it for 30 seconds.

[0060] After Phase 2 is completed, switch to Phase 3 parameters, reduce the flow rate to 0.8 L / min, inflate to 28 cmH2O and maintain for 40 seconds to complete the gradual expansion.

[0061] Steps S1 and S4 are the same as in Example 2, and will not be repeated here.

[0062] The above embodiments are merely preferred embodiments of the present invention. It should be noted that the scope of protection of the present invention is not limited to the above embodiments. All technical solutions disclosed in the claims and specification, combined with different medical cuff usage scenarios, adjustments to air source type, expansion mode and pressure parameters, are within the scope of protection of the present invention.

Claims

1. A medical inflation device, characterized in that, It includes a gas storage chamber, a constant pressure chamber, a pressure detection module, a central controller, and multiple airflow control modules; The air inlet of the constant pressure chamber is connected to the air outlet of the gas storage chamber through a first controllable flow path, and the first air outlet of the constant pressure chamber is the gas supply outlet of the bladder. The air inlet of the gas storage chamber is selectively connected to multiple gas sources through a second controllable flow path; The second air outlet of the constant pressure chamber is connected to the external atmosphere through a third controllable flow path; Each of the first, second, and third controllable flow paths is equipped with an airflow control module; the airflow control module is used to regulate the airflow interruption and flow rate. The pressure detection module includes a first pressure sensor for detecting the pressure of the constant pressure chamber and a second pressure sensor for detecting the pressure of the gas storage chamber. The central controller is electrically connected to the airflow control module and the pressure detection module. The central controller is configured to acquire pressure data from the pressure detection module in real time and control the airflow control module based on pressure feedback to achieve inflation, deflation and dynamic pressure maintenance of the cuff.

2. The medical inflation device according to claim 1, characterized in that, The second controllable flow path includes a first intake passage, a second intake passage, and a third intake passage; The first air intake passage has a centralized air supply inlet at the air intake end and an air outlet end connected to the air storage chamber. The second air intake passage has an air intake port for an external air pump and an air outlet connected to an air storage chamber. The third air intake passage has an air intake end that is a built-in air pump supply port, and the air outlet end is connected to the air storage chamber via the built-in air pump, which provides air intake power. An airflow control module is provided between the gas storage chamber and the centralized gas supply inlet, between the gas storage chamber and the external air pump inlet, and between the gas storage chamber and the built-in air pump.

3. A medical inflation device according to claim 2, characterized in that, A first purification chamber is provided between the air inlet of the external air pump and the air storage chamber; a second purification chamber is provided between the internal air pump and the air storage chamber.

4. A medical inflation device according to claim 2, characterized in that, One end of the third controllable flow path is connected to the air outlet of the constant pressure chamber, and the other end is connected to the external atmosphere through the built-in air pump supply outlet. The built-in air pump provides exhaust power. The airflow control module on the third controllable flow path is located between the constant pressure chamber and the built-in air pump.

5. A medical inflation device according to claim 4, characterized in that, The third controllable flow path is provided with a first airflow interruption element near the air supply outlet of the built-in air pump; the third air intake passage is provided with a second airflow interruption element near the air supply inlet of the built-in air pump; and the third air intake pipeline is provided with a third airflow interruption element near the air intake end of the second purification chamber.

6. A medical inflation device according to claim 1, characterized in that, It also includes a control panel, a data module, and a power module; The data module is electrically connected to the central controller and is used to realize the real-time transmission of pressure data and control commands. The control panel is electrically connected to the central controller and is used to display the device status and receive user input operation commands. The heat dissipation system is located inside the device and is used to dissipate heat from the built-in air pump and central controller. The power module supplies power to all electrical components.

7. A medical inflation device according to claim 5, characterized in that, The airflow control module includes a solenoid valve for controlling the interruption of airflow and a gas mass flow controller for regulating gas flow; the first airflow interruption element and the second airflow interruption element are both solenoid valves for controlling the interruption of airflow.

8. A method for inflating a medical inflation device, applied to a medical inflation device as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Select the gas source via the control panel; S2: Select the expansion mode via the control panel and configure the gas flow and pressure parameters for this mode; S3: Turn on the airflow control module on the air intake path corresponding to the gas source, and the gas first enters the gas storage chamber; when the pressure in the gas storage chamber reaches the set value, turn off the airflow control module on the corresponding air intake path, turn on the airflow control module between the gas storage chamber and the constant pressure chamber, and the gas inflates the bladder through the constant pressure chamber; when the pressure in the constant pressure chamber reaches the target pressure, turn off the airflow control module between the gas storage chamber and the constant pressure chamber, and the bladder inflation is completed. S4: Real-time monitoring of the pressure value inside the constant pressure chamber, and dynamic replenishment, exhaust, or timed replenishment of air in the constant pressure chamber based on the preset pressure value feedback.

9. The inflation method of a medical inflation device according to claim 8, characterized in that, In step S2, the expansion mode includes rapid expansion, slow expansion, gradual expansion, or reciprocating expansion; The gas flow rates for the rapid expansion mode and the slow expansion mode are set to fixed values; The gas flow rate in the progressive expansion mode is divided into a multi-stage stepped increase setting, with each stage maintained for a set time. The reciprocating expansion mode has a preset number of expansions, and the inflation and deflation alternate according to the preset number of expansions.

10. The inflation method of a medical inflation device according to claim 8, characterized in that, Step S1 also includes determining the validity of the gas source connection. The method for determining the validity of the gas source connection is as follows: a preset detection time is set, the second pressure sensor monitors and feeds back the pressure in the gas storage chamber. If the pressure in the gas storage chamber rises within the preset detection time, the gas source connection is considered valid; otherwise, the gas source connection is considered abnormal. When the gas source connection is abnormal, it automatically switches to other gas source types. When the gas source is an external air pump or an internal air pump, the gas purification chamber of the corresponding air intake passage is started simultaneously. Step S3 also includes determining whether the cuff is damaged. The method for determining whether the cuff is damaged is as follows: after inflating the cuff, if the first pressure sensor in the constant pressure chamber does not detect that the pressure reaches the pressure threshold within a preset time, or if the pressure decreases within p minutes after reaching the pressure threshold, the cuff is determined to be damaged. When the cuff is detected to be damaged, an alarm is triggered and the abnormal information is transmitted to the network.

Images