Ventilation Device with Exhaled CO2 Feedback Control

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Solution Overview

Problem

Existing ventilation devices struggle with timely and accurate detection and correction of hypoventilation or hyperventilation, leading to potential physical damage in patients, as manual adjustments are not conducive to rapid response.

Innovation Solution

A ventilation device and method that automatically adjusts ventilation control parameters based on exhaled CO2 concentration, using a controller to monitor and synchronize with patient's breathing patterns, adjusting tidal volume, trigger sensitivity, and respiratory rate to maintain optimal pulmonary ventilation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If manual monitoring and adjustment of ventilation parameters is used, then device complexity is reduced, but response time and correction speed are insufficient leading to delayed detection and correction of hypoventilation or hyperventilation

Engineering Contradiction:

Improveresponse time for detecting and correcting ventilation abnormalitiesVSAvoidautomation control system complexity

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The system continuously monitors exhaled CO2 concentration and uses this feedback to automatically adjust ventilation parameters. The controller compares actual CO2 levels with target ranges and dynamically modifies tidal volume and respiratory rate to maintain optimal ventilation, enabling rapid detection and correction of ventilation abnormalities without manual intervention

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The ventilation device performs self-adjustment by automatically detecting ventilation status through CO2 monitoring and autonomously correcting hypoventilation or hyperventilation conditions. The system serves itself by eliminating the need for continuous manual monitoring and adjustment, thereby reducing response time while maintaining manageable complexity through automated control algorithms

Inventive Principle:

Principle #25Self-service

2Measurement precision

If automatic adjustment of ventilation parameters based on CO2 concentration is implemented, then response speed and accuracy are improved, but device complexity increases

Engineering Contradiction:

Improvedetection accuracy of ventilation stateVSAvoidcontrol system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system employs continuous feedback from CO2 concentration measurements to precisely detect ventilation status. By comparing actual CO2 levels against target ranges in real-time, the system achieves high measurement precision in determining whether hypoventilation or hypervestilation is occurring, with the controller automatically adjusting parameters based on this precise detection

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual mechanical adjustment with automated electronic control based on CO2 sensing. The electronic controller substitutes for manual operation, using sensor data to automatically modify ventilation parameters, thereby improving detection accuracy while managing complexity through electronic automation rather than mechanical means

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If continuous monitoring of exhaled CO2 concentration is performed, then ventilation state detection accuracy is improved, but energy consumption and device complexity increase

Engineering Contradiction:

Improveventilation state monitoring reliabilityVSAvoidenergy consumption of monitoring system

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system maintains continuous monitoring of exhaled CO2 concentration throughout the ventilation process, ensuring uninterrupted detection of ventilation status. This continuous action provides reliable real-time data for detecting hypoventilation or hyperventilation, with the monitoring operating throughout each breath cycle to maintain high reliability

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The continuous CO2 monitoring creates a closed-loop feedback system where ventilation status is constantly assessed and automatically corrected. The reliable continuous data stream enables the controller to make timely adjustments, with the feedback mechanism ensuring that monitoring resources are used efficiently to maintain patient safety

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250325767A1Ventilation device, ventilation control method therefor, and storage medium

Publication Date: 2025.10.23 SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD

AI summary

A ventilation device, a ventilation control method therefor, and a storage medium. The method includes: acquiring ventilation control parameters, and causing, on the basis of the ventilation control parameters, a ventilation airway assembly to ventilate a patient; acquiring a target exhalation CO2 concentration range; acquiring an actual exhalation CO2 concentration of the patient; determining whether the actual exhalation CO2 concentration is within the target exhalation CO2 concentration range: if the actual exhalation CO2 concentration is not within the target exhalation CO2 concentration range, adjusting the ventilation control parameters, and causing, on the basis of the adjusted ventilation control parameters, the ventilation airway assembly to ventilate the patient.