Positive and negative pressure convertible type medical pressurizing cabin system for plateau first-aid transfer
By installing a positive and negative pressure convertible medical hyperbaric chamber system on ambulances, the problems of limited functionality and difficulty in pressure control of portable hyperbaric oxygen chambers have been solved, enabling long-distance stable treatment of critically ill patients and efficient use of resources, thus meeting the emergency needs of various types of emergencies.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-20
- Publication Date
- 2026-03-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing portable hyperbaric oxygen chambers have limited functionality, pressure, and battery life, making it difficult to meet the needs for continuous, stable, and safe treatment and transport of critically ill patients under long-distance and complex road conditions. Furthermore, controlling the external environmental pressure during vehicle movement is challenging.
Design a positive and negative pressure convertible medical pressurization chamber system to be installed on an ambulance, including a fully enclosed rigid medical pressurization main chamber, an integrated pressure control and life support unit, and equipped with a pressure regulation module, a central controller, an environmental monitoring module and a medical gas interface. It can switch between high-altitude pressurized emergency rescue and negative pressure isolation transport modes, and is equipped with intelligent travel pressure management and self-testing functions.
It enables continuous and stable treatment of critically ill patients during movement, ensures pressure maintenance equivalent to that in low-altitude environments, improves the efficiency of emergency resources and emergency response capabilities, and adapts to flexible responses to various emergencies.
Smart Images
Figure CN121731084A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, specifically to a positive and negative pressure convertible medical pressurization chamber system for high-altitude emergency transport. Background Technology
[0002] In high-altitude areas, the air is thin, and atmospheric pressure and oxygen partial pressure decrease significantly with increasing altitude. Patients with acute mountain sickness suffer from severe deficiencies in dissolved oxygen levels in their blood due to environmental hypoxia. Simply administering oxygen at normal atmospheric pressure has limited effectiveness in improving tissue hypoxia, especially in tissues reliant on dissolved oxygen for energy. Hyperbaric oxygen therapy is a clinically proven effective treatment for this condition. Its principle lies in significantly increasing the amount of dissolved oxygen in the blood by raising the environmental pressure, thereby rapidly correcting tissue hypoxia. Therefore, fixed hyperbaric oxygen chambers have become essential equipment in medical institutions in high-altitude areas.
[0003] A hyperbaric chamber, a sealed compartment that maintains an internal pressure higher than the external ambient pressure, is used for hyperbaric oxygen therapy. Traditional medical hyperbaric chambers are mostly fixed structures, bulky and immobile. To meet mobility needs, some portable soft pressurization bags or small rigid pressurization chambers exist, but their functions are limited (usually only providing pressurization), pressure is limited, operating time is short, and they lack comprehensive life support and environmental control systems, making it difficult to meet the needs of continuous, stable, and safe treatment and transport of critically ill patients over long distances and in complex road conditions.
[0004] High-altitude emergency transport, especially long-distance transport from high-altitude sites to low-altitude hospitals, presents certain challenges: patients receive continuous hyperbaric oxygen therapy equivalent to that at low altitudes to sustain life during transport, but controlling external environmental pressure is difficult as the vehicle continues to move.
[0005] Therefore, a positive and negative pressure convertible medical pressurization chamber system for high-altitude emergency transport was designed to solve the aforementioned technical problems. Summary of the Invention
[0006] To address the shortcomings of existing technologies, this invention provides a positive and negative pressure convertible medical pressurization chamber system for high-altitude emergency transport, which solves the technical problems mentioned in the background section.
[0007] To achieve the above objectives, the present invention provides the following technical solution: a positive and negative pressure convertible medical pressurization chamber system for high-altitude emergency transport, installed on an ambulance, comprising: A fully enclosed rigid medical pressurized main cabin mounted on the vehicle; And an integrated pressure control and life support unit connected to the aforementioned pressurized medical main cabin; The integrated pressure control and life support unit includes a pressure regulation module, a central controller, a pressure sensor array, an environmental monitoring module, and a medical gas interface. The pressure control module includes an air compressor unit, a vacuum pump unit, and controlled ventilation valves, and is connected to the medical pressurization main cabin via pipelines. The pressure sensor array is used to monitor the absolute pressure inside the medical pressurized main cabin and the pressure difference between the inside and outside of the cabin in real time. The central controller receives signals from the pressure sensor array and controls the operation of the pressure regulation module. The environmental monitoring module is used to monitor the oxygen concentration, carbon dioxide concentration, temperature, and humidity inside the medical pressurized main cabin; The medical gas interface is located inside the medical pressurized main cabin and is used to connect to the oxygen supply device; The central controller is configured to control the pressure regulation module, enabling the medical pressurized main cabin to stably maintain and switch between two working pressure states: the first state is a high-altitude pressurized emergency rescue mode where the cabin pressure is always higher than the external environmental pressure, and the second state is a negative pressure isolation and transfer mode where the cabin pressure is always lower than the external environmental pressure.
[0008] Preferably, the system further includes an intelligent stroke pressure management module, which is connected to the central controller; In high-altitude pressurization emergency mode, once the system obtains the destination information and the estimated arrival time, the intelligent travel pressure management module automatically starts the linear pressure relief program; The linear depressurization program controls the pressure regulation module to ensure that the pressure inside the medical pressurized main cabin decreases at a constant rate to reach equilibrium with the external environmental pressure within a preset travel time period before reaching the destination.
[0009] Preferably, a high-efficiency air filter is connected in series in the exhaust passage of the pressure regulation module; When the system is in negative pressure isolation transfer mode, all gases discharged from the medical pressurized main cabin are filtered by the high-efficiency air filter before being released into the external environment.
[0010] Preferably, the cabin of the medical pressurized main compartment is made of fiber-reinforced composite material, forming an integral sealed pressure-bearing structure capable of withstanding repeated positive and negative pressure loads.
[0011] Preferably, the system further includes an embedded airtightness self-test function; The embedded airtightness self-test function is executed by the central controller. The process is as follows: the control pressure regulation module inflates or deflates the sealed medical pressurized main cabin to a test pressure value, then the pipeline is closed, the pressure change value is monitored by the pressure sensor array within a fixed time, and the overall airtightness status of the cabin is judged based on the pressure change value.
[0012] Preferably, the system is equipped with a one-button emergency rescue mode triggering device; When the one-button emergency mode trigger device is activated, the central controller automatically executes a predetermined operation sequence, which includes at least: controlling the pressure regulation module to rapidly pressurize the medical pressurized main cabin to a preset target value, and simultaneously activating the environmental monitoring module.
[0013] Preferably, the system further includes an integrated remote communication monitoring platform; The integrated remote communication monitoring platform includes in-cabin audio and video acquisition equipment, vital signs data interface and wireless data transmission terminal, which are used to remotely transmit real-time images, environmental parameters and patient physiological data in the cabin to the emergency command center. Beneficial effects
[0014] This invention provides a positive / negative pressure convertible medical pressurization chamber system for high-altitude emergency transport. This system enables continuous, stable, and low-altitude-equivalent pressure maintenance therapy for critically ill patients during long-distance transport on a mobile vehicle platform. Intelligent travel pressure management seamlessly integrates the treatment process with hospital reception procedures, preventing delays in treatment due to waiting for depressurization. Furthermore, the system's built-in environmental monitoring and self-checking functions enhance operational safety and reliability. The convertible design between positive and negative pressure operating modes allows the same equipment to flexibly handle various public health emergencies, such as high-altitude disease emergency care and infectious disease isolation and transport, effectively improving the utilization efficiency of limited emergency resources and comprehensive emergency support capabilities in high-altitude areas. Attached Figure Description
[0015] Figure 1 This is a flowchart illustrating a positive and negative pressure convertible medical pressurization chamber system for high-altitude emergency transport, as described in this invention. Detailed Implementation
[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] Please see Figure 1 This invention provides a technical solution: a positive and negative pressure convertible medical pressurization chamber system for high-altitude emergency transport, installed on an ambulance, the system comprising: A fully enclosed rigid medical pressurized main cabin mounted on the vehicle; And an integrated pressure control and life support unit connected to the aforementioned pressurized medical main cabin; The integrated pressure control and life support unit includes a pressure regulation module, a central controller, a pressure sensor array, an environmental monitoring module, and a medical gas interface. The pressure control module includes an air compressor unit, a vacuum pump unit, and controlled ventilation valves, and is connected to the medical pressurization main cabin via pipelines. The pressure sensor array is used to monitor the absolute pressure inside the medical pressurized main cabin and the pressure difference between the inside and outside of the cabin in real time. The central controller receives signals from the pressure sensor array and controls the operation of the pressure regulation module. The environmental monitoring module is used to monitor the oxygen concentration, carbon dioxide concentration, temperature, and humidity inside the medical pressurized main cabin; The medical gas interface is located inside the medical pressurized main cabin and is used to connect to the oxygen supply device; The central controller is configured to control the pressure regulation module, enabling the medical pressurized main cabin to stably maintain and switch between two working pressure states: the first state is a high-altitude pressurized emergency rescue mode where the cabin pressure is always higher than the external environmental pressure, and the second state is a negative pressure isolation and transfer mode where the cabin pressure is always lower than the external environmental pressure.
[0018] In this embodiment, the system further includes an intelligent stroke pressure management module, which is connected to the central controller. In high-altitude pressurization emergency mode, once the system obtains the destination information and the estimated arrival time, the intelligent travel pressure management module automatically starts the linear pressure relief program; The linear depressurization program controls the pressure regulation module to ensure that the pressure inside the medical pressurized main cabin decreases at a constant rate to reach equilibrium with the external environmental pressure within a preset travel time period before reaching the destination.
[0019] In this embodiment, a high-efficiency air filter is connected in series in the exhaust passage of the pressure regulation module; When the system is in negative pressure isolation transfer mode, all gases discharged from the medical pressurized main cabin are filtered by the high-efficiency air filter before being released into the external environment.
[0020] In this embodiment, the cabin of the medical pressurized main cabin is made of fiber-reinforced composite material, forming an integral sealed pressure-bearing structure capable of withstanding repeated positive and negative pressure loads.
[0021] In this embodiment, the system is further configured to include an embedded airtightness self-test function; The embedded airtightness self-test function is executed by the central controller. The process is as follows: the control pressure regulation module inflates or deflates the sealed medical pressurized main cabin to a test pressure value, then the pipeline is closed, the pressure change value is monitored by the pressure sensor array within a fixed time, and the overall airtightness status of the cabin is judged based on the pressure change value.
[0022] In this embodiment, the system is further configured to have a one-button emergency rescue mode triggering device; When the one-button emergency mode trigger device is activated, the central controller automatically executes a predetermined operation sequence, which includes at least: controlling the pressure regulation module to rapidly pressurize the medical pressurized main cabin to a preset target value, and simultaneously activating the environmental monitoring module.
[0023] In this embodiment, the system is further configured to include an integrated remote communication monitoring platform; The integrated remote communication monitoring platform includes in-cabin audio and video acquisition equipment, vital signs data interface and wireless data transmission terminal, which are used to remotely transmit real-time images, environmental parameters and patient physiological data in the cabin to the emergency command center.
[0024] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.
[0025] Example: The system is carried by an ambulance with a reinforced chassis. Its medical cabin is transformed into a fully enclosed rigid pressurized main cabin integrally formed by fiber-reinforced composite materials. The main cabin is completely physically isolated from the driver's cabin. Observation windows, sealed transfer windows, oxygen supply interfaces and lighting systems meeting medical standards are provided on the cabin walls. The core of the system is a pressure control and life support unit integrated on the vehicle chassis girder. This unit includes a silent scroll air compressor, an oil rotary vane vacuum pump, a set of precision proportional regulating valve groups driven by a servo motor, a buffer balance tank and corresponding air filtration components. At reasonable positions on the inner top and side walls of the pressurized main cabin, absolute pressure sensors, differential pressure sensors, oxygen concentration sensors, carbon dioxide sensors and temperature and humidity sensors are installed. The signal cables of all sensors are aggregated and connected to the central control cabinet located at the co-pilot position in the driver's cabin. The central control cabinet has an industrial-grade programmable logic controller as the central controller. Its touch-screen human-machine interface provides functions such as mode selection, pressure setting, real-time data display and alarm information viewing. When implementing the plateau pressurized first aid mode, the operator selects this mode through the touch screen and sets the target equivalent altitude. The central controller then starts the air compressor and precisely controls the air flow into the main cabin through the proportional regulating valve, so that the cabin pressure rises at a steady rate and stabilizes at a preset value about 15 - 20 kPa higher than the external environment (corresponding to the equivalent altitude dropping to about 2500 meters). At the same time, the cabin environmental monitoring system keeps working, and medical oxygen is supplied at a fixed concentration regulated by the Venturi principle to ensure effective oxygenation of patients in the pressurized environment. When the transfer task is started and the destination is input, the built-in navigation and timing module of the system starts to work. 20 minutes before the expected arrival at the destination, the intelligent journey pressure management program is automatically activated. The central controller controls the proportional regulating valve to slowly open the exhaust passage and linearly relieve pressure at a constant rate of about 0.8 - 1.0 kPa per minute, ensuring that the pressure inside and outside the cabin is basically balanced when the ambulance stops, and medical staff can immediately open the airtight door for rapid transfer. When implementing the negative pressure isolation transfer mode, the operator selects this mode. The central controller starts the vacuum pump and maintains the cabin pressure at a stable level about -25 to -30 Pa lower than the external environment. All discharged gases are filtered through a H13-class high-efficiency particulate air filter installed at the end of the exhaust passage. Before each start or during regular maintenance of the system, an embedded airtightness self-check can be performed: The controller first closes all valves, starts the compressor to raise the cabin pressure to +100 Pa, then seals the system and monitors the pressure decay within 10 minutes. If the decay value is less than 15 Pa, the airtightness is judged to be qualified.
[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.
Claims
1. A positive and negative pressure convertible medical pressure cabin system for highland emergency transport, installed on an ambulance vehicle, characterized in that, The system comprises: a fully-closed rigid medical pressurized main cabin arranged on a vehicle; and an integrated pressure control and life support unit in communication with the medical pressurized main cabin; the integrated pressure control and life support unit comprises a pressure regulating module, a central controller, a pressure sensor array, an environmental monitoring module and a medical gas interface; the pressure regulating module comprises an air compressor set, a vacuum pump set and a controlled ventilation valve, and is connected to the medical pressurized main cabin through pipelines; the pressure sensor array is used to monitor the absolute pressure in the medical pressurized main cabin and the pressure difference between inside and outside the cabin in real time; the central controller receives signals from the pressure sensor array and controls the operation of the pressure regulating module; the environmental monitoring module is used to monitor the oxygen concentration, carbon dioxide concentration, temperature and humidity in the medical pressurized main cabin; the medical gas interface is arranged in the medical pressurized main cabin and is used to connect an oxygen supply device; the central controller is configured to control the pressure regulating module so that the medical pressurized main cabin can be stably maintained and switched between two working pressure states, a first state being a high-altitude pressurized first-aid mode in which the pressure in the cabin is always higher than the ambient pressure, and a second state being a negative pressure isolation transfer mode in which the pressure in the cabin is always lower than the ambient pressure.
2. The positive and negative pressure convertible medical pressure cabin system for high altitude emergency rescue and transfer according to claim 1, characterized in that The system further comprises an intelligent travel pressure management module connected to the central controller; in the high-altitude pressurized first-aid mode, when the system obtains destination information and estimated arrival time, the intelligent travel pressure management module automatically starts a linear pressure relief program; the linear pressure relief program controls the pressure regulating module so that the pressure in the medical pressurized main cabin decreases at a constant rate to balance with the ambient pressure within a preset travel time period before arrival at the destination.
3. The positive and negative pressure convertible hyperbaric chamber system for high altitude emergency rescue and transportation according to claim 1, characterized in that An efficient air filter is connected in series to the exhaust passage of the pressure regulating module; when the system is in the negative pressure isolation transfer mode, all the gas discharged from the medical pressurized main cabin is filtered by the efficient air filter before being discharged to the ambient environment.
4. The positive and negative pressure convertible hyperbaric chamber system for high altitude emergency rescue and transportation according to claim 1, characterized in that The cabin body of the medical pressurized main cabin is made of fiber-reinforced composite material, forming a whole sealed pressure-bearing structure capable of bearing repeated positive and negative pressure loads.
5. The positive and negative pressure convertible hyperbaric chamber system for high altitude emergency rescue and transport of claim 1, wherein The system further comprises an embedded air-tightness self-checking function; the embedded air-tightness self-checking function is executed by the central controller, and the process is to control the pressure regulating module to inflate or deflate the sealed medical pressurized main cabin to a test pressure value, then close the pipelines, monitor the pressure change value within a fixed time through the pressure sensor array, and judge the overall air-tightness state of the cabin body according to the pressure change value.
6. The positive and negative pressure convertible hyperbaric chamber system for high altitude emergency rescue and transport of claim 1, wherein The system is provided with a one-key first-aid mode triggering device; when the one-key first-aid mode triggering device is activated, the central controller automatically executes a predetermined operation sequence, which at least includes controlling the pressure regulating module to rapidly pressurize the medical pressurized main cabin to a preset target value and simultaneously activating the environmental monitoring module.
7. The positive and negative pressure convertible hyperbaric chamber system for high altitude emergency rescue and transport of claim 1, wherein The system further comprises an integrated remote communication monitoring platform; The integrated remote communication monitoring platform comprises an in-cabin audio and video acquisition device, a vital sign data interface and a wireless data transmission terminal, which are used for remotely transmitting the in-cabin real-time picture, environmental parameters and patient physiological data to the emergency command center.