CN-121971283-A - Cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control

CN121971283ACN 121971283 ACN121971283 ACN 121971283ACN-121971283-A

Abstract

The invention relates to the technical field of biomedical engineering and emergency life support, in particular to a cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control, which aims at the problems of high risk of secondary injury, blind pressing and fixed parameters of the existing equipment and provides the following scheme, wherein the cardiopulmonary resuscitation system comprises an adjustable mechanical support system, a pneumatic pressing execution system, a physiological signal detection system and a central intelligent processing and control system; the pneumatic compression execution system realizes smooth pressure increment through an air pressure gradient control algorithm and reduces instantaneous impact force in cooperation with a flexible contact capsule body, the physiological signal detection system acquires multi-mode signals of electrocardio, photoelectric volume pulse wave and chest impedance blood flow diagram in the compression intermittent period, and the central intelligent processing and control system evaluates the compression effectiveness based on physiological feedback and dynamically adjusts compression parameters through a self-adaptive strategy. The invention improves the safety and effectiveness of cardiopulmonary resuscitation, has convenient operation and strong suitability, and is suitable for clinical and pre-hospital emergency scenes.

Inventors

LIU HUANHUAN
LIU GANG
WANG HAILONG

Assignees

安徽医科大学第一附属医院

Dates

Publication Date: 20260505
Application Date: 20260329

Claims (10)

1. The cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control is characterized by comprising an adjustable mechanical support system, a pneumatic pressing execution system, a physiological signal detection system and a central intelligent processing and control system; the adjustable mechanical support system is arranged and fixed above the trunk of the patient in a straddling way and is used for providing mounting and positioning support for the pneumatic pressing execution system; The pneumatic pressing execution system is arranged on the adjustable mechanical support system and comprises a flexible contact capsule body, an air pressure adjusting module, a sensing unit and an air source, wherein the air pressure adjusting module is communicated with the flexible contact capsule body and comprises an electromagnetic valve for receiving a control signal and linearly and continuously adjusting the air pressure output to the flexible contact capsule body, and the sensing unit is a piezoresistive pressure sensor and is used for monitoring the air pressure in the flexible contact capsule body in real time; the physiological signal detection system comprises an electrocardio detection electrode, a photoelectric volume pulse wave probe and an impedance blood flow graph detection module, wherein the electrocardio detection electrode is integrated on the contact surface of the flexible contact capsule body, the photoelectric volume pulse wave probe is used for detecting pulse wave signals aiming at the arterial pulsation position of the body surface of a patient, and an excitation electrode and a measurement electrode of the impedance blood flow graph detection module are arranged on the chest of the patient; The central intelligent processing and control system is respectively and electrically connected with the air pressure adjusting module, the piezoresistive pressure sensor and the physiological signal detection system, runs an air pressure gradient control algorithm, enables the pressure in the flexible contact capsule body to reach a target value according to a preset pressure change gradient by outputting a gradient control signal to the electromagnetic valve, collects and processes signals of the physiological signal detection system in an chest compression intermittent period, evaluates the effectiveness of compression cycle based on a processing result, and dynamically adjusts subsequent compression target parameters.
2. The cardiopulmonary resuscitation system integrating multimodal physiological feedback and air pressure gradient control of claim 1, wherein said air pressure gradient control algorithm is executed as follows: the central intelligent processing and control system calculates the required target air pressure P_target according to the preset target pressing depth and the patient individual information; generating a pressure setting curve P_set (t) which is smoothly increased from the initial pressure to the target pressure P_target in a linear or S-shaped manner according to a preset pressure rising time Tr; the electromagnetic valve is driven by adopting a closed-loop control algorithm through the real-time feedback of the piezoresistive pressure sensor, so that the actual pressure P_real (t) in the flexible contact bag body tracks the pressure setting curve P_set (t) in real time.
3. The cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control according to claim 2, wherein the pressure rising time Tr is an adjustable parameter, the range of the pressure rising time Tr is 20ms-100ms, the central intelligent processing and control system automatically adjusts the Tr value according to the estimated or learned patient thoracic compliance, the longer Tr value is selected to realize soft compression when the thoracic compliance is high, and the shorter Tr value is selected to ensure compression efficiency when the thoracic compliance is low.
4. The cardiopulmonary resuscitation system integrating multi-modal physiological feedback and air pressure gradient control of claim 1, wherein said impedance flow graph detection module is configured to apply a safe high-frequency weak ac excitation current to a chest of a patient during a relaxation phase of a single compression cycle, detect a chest impedance change via a measurement electrode, calculate a chest impedance Z (t) and its differential dZ/dt, and non-invasively evaluate a trend of a stroke volume change generated by compression by analyzing characteristics of a dZ/dt waveform.
5. The cardiopulmonary resuscitation system integrating multimodal physiological feedback and air pressure gradient control of claim 1, wherein said central intelligent processing and control system is configured with an adaptive adjustment strategy comprising: analyzing electrocardiosignals, identifying shockable heart rhythm or autonomous circulation recovery signs, and correspondingly prompting defibrillation or adjusting a compression mode; a second strategy is to take the blood flow trend calculated by the impedance blood flow diagram and the photoelectric volume pulse wave amplitude as effective blood flow indexes, and automatically and slightly increasing the target pressing depth or pressure if the indexes are continuously lower than a preset threshold value; and thirdly, analyzing the relation between the pressure required by reaching the standard compression depth and the thoracic impedance, and dynamically correcting the thoracic stiffness model parameters of the patient for the accurate control of the subsequent compression parameters.
6. The cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control according to claim 1, wherein the response bandwidth of the electromagnetic valve is more than or equal to 100Hz, the sampling rate of the piezoresistive pressure sensor is more than or equal to 1kHz, and the electromagnetic valve and the piezoresistive pressure sensor together form an air pressure closed loop servo system with high frequency response.
7. The cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control according to claim 1, wherein the bottom surface of the flexible contact capsule body is of a multi-chamber independently controllable structure and comprises a central main chamber and at least one peripheral auxiliary chamber surrounding the central main chamber, and the air pressure regulating module is provided with an independent air passage and an independent control unit for each chamber to realize focused pressing or wave pressing.
8. The cardiopulmonary resuscitation system integrating multimodal physiological feedback and air pressure gradient control according to claim 1, wherein the adjustable mechanical support system is made of an aviation aluminum alloy and is provided with a quick release lock catch and an electric lifting mechanism, and a sliding rail is integrated on a cross beam, so that the pneumatic pressing execution system is allowed to perform fine adjustment of front, back, left and right positions so as to be aligned to the lower 1/3 position in the sternum of a patient.
9. The cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control according to claim 1, wherein the air source is a portable high-pressure carbon fiber air bottle, the working pressure is 300Bar, adjustable pressure air of 0-1MPa is output after two-stage decompression, the flexible contact bag body is made of medical grade silica gel, and the bottom surface is a slightly convex curved surface matched with the curvature of the chest of a human body.
10. The cardiopulmonary resuscitation system of any of claims 1-9, further comprising a remote collaboration interface for transmitting real-time physiological data, compression parameters, and system operational status to a remote medical center via a wireless network, and receiving control instructions from the remote medical center.

Description

Cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control Technical Field The invention relates to the technical field of biomedical engineering and emergency life support, in particular to a cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control. Background Sudden cardiac arrest is an emergency medical condition that threatens human life, and high quality chest compressions are the central link in saving patient life during cardiopulmonary resuscitation. At present, automatic chest compression equipment is applied to scenes such as clinical emergency and pre-hospital emergency, but the existing equipment has a plurality of technical limitations: 1. The prior equipment is driven by a motor or a common electromagnetic valve, and generates instantaneous impact force in the pressing process, so that secondary injuries such as rib fracture, visceral injury and the like of patients are easily caused, and the risk of injury to old people and osteoporosis patients is higher; 2. The traditional equipment is generally in a blind pressing mode, lacks the capability of detecting and evaluating the actual blood flow perfusion effect in the pressing process in real time, and cannot judge whether the pressing is effective or not; 3. the physiological signal acquisition is difficult, namely the strong mechanical pressing action can seriously interfere the acquisition of conventional physiological signals such as electrocardio, blood oxygen and the like, so that the physiological state of a patient cannot be monitored on line; 4. the compression parameters are fixed, namely the parameters such as compression depth, pressure, frequency and the like of the existing equipment are fixed, and cannot be dynamically adjusted according to individual differences (such as chest compliance and weight) of patients and physiological feedback in the compression process, so that personalized optimal compression is difficult to realize. Therefore, the scheme provides the cardiopulmonary resuscitation system integrating the multi-mode physiological feedback and the air pressure gradient control so as to improve the safety and the effectiveness of cardiopulmonary resuscitation. Disclosure of Invention The cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control solves the problems that secondary damage, blind pressing, parameter fixing and signal acquisition are easy to cause when the cardiopulmonary resuscitation system is used in the prior art. In order to achieve the above purpose, the present invention adopts the following technical scheme: a cardiopulmonary resuscitation system integrating multi-mode physiological feedback and air pressure gradient control comprises an adjustable mechanical support system, a pneumatic pressing execution system, a physiological signal detection system and a central intelligent processing and control system; the adjustable mechanical support system is arranged and fixed above the trunk of the patient in a straddling way and is used for providing mounting and positioning support for the pneumatic pressing execution system; The pneumatic pressing execution system is arranged on the adjustable mechanical support system and comprises a flexible contact capsule body, an air pressure adjusting module, a sensing unit and an air source, wherein the air pressure adjusting module is communicated with the flexible contact capsule body and comprises an electromagnetic valve for receiving a control signal and linearly and continuously adjusting the air pressure output to the flexible contact capsule body, and the sensing unit is a piezoresistive pressure sensor and is used for monitoring the air pressure in the flexible contact capsule body in real time; the physiological signal detection system comprises an electrocardio detection electrode, a photoelectric volume pulse wave probe and an impedance blood flow graph detection module, wherein the electrocardio detection electrode is integrated on the contact surface of the flexible contact capsule body, the photoelectric volume pulse wave probe is used for detecting pulse wave signals aiming at the arterial pulsation position of the body surface of a patient, and an excitation electrode and a measurement electrode of the impedance blood flow graph detection module are arranged on the chest of the patient; The central intelligent processing and control system is respectively and electrically connected with the air pressure adjusting module, the piezoresistive pressure sensor and the physiological signal detection system, runs an air pressure gradient control algorithm, enables the pressure in the flexible contact capsule body to reach a target value according to a preset pressure change gradient by outputting a gradient control signal to the electromagnetic valve, collects and processes signa