Ventilation Trigger Detection via Neural Network Waveform Matching

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Solution Overview

Problem

Existing ventilators often fail to accurately detect patient-ventilator synchrony during mechanical ventilation, leading to issues such as ineffective effort, double triggering, false triggering, delayed cycling, and premature cycling.

Innovation Solution

A ventilation trigger detection method and apparatus that monitor airway pressure and flow parameters in real-time, using similarity matching of waveforms to determine synchrony and adjust trigger sensitivity accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional threshold-based detection methods are used, then the device complexity is low, but the measurement precision of patient-ventilator synchrony is insufficient

Engineering Contradiction:
Improvedetection accuracy of patient-ventilator synchronyVSAvoidcomplexity of detection algorithm
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces traditional mechanical threshold-based detection with a neural network-based intelligent detection system. The neural network model automatically learns optimal detection thresholds and patterns from training data, substituting simple mechanical comparison operations with adaptive intelligent processing, thereby improving measurement precision while managing complexity through software-based solutions.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent dynamically adjusts detection parameters by training the neural network on diverse patient-ventilator interaction data. The system changes detection thresholds and sensitivity parameters based on learned patterns rather than using fixed values, allowing adaptive optimization of detection accuracy for different clinical scenarios and patient conditions.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If multiple ventilation parameters are monitored simultaneously, then the reliability of synchrony detection is improved, but the use of energy increases

Engineering Contradiction:
Improvereliability of patient-ventilator synchrony detectionVSAvoidenergy consumption of ventilator
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent extracts and processes only the most critical ventilation parameters (airway pressure and flow rate) that are essential for detecting patient-ventilator synchrony. By selecting and monitoring only these key parameters rather than all available sensors, the system maintains high detection reliability while minimizing energy consumption associated with continuous multi-parameter monitoring.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The neural network model performs self-optimization by automatically adjusting which parameters require intensive monitoring based on learned patterns. The system identifies and focuses computational resources on the most informative parameters for each specific patient-ventilator interaction scenario, reducing unnecessary energy expenditure on monitoring less relevant parameters.

Inventive Principle:
Principle #25Self-service

3Speed

If real-time waveform similarity matching is implemented, then the detection speed is improved, but the device complexity increases

Engineering Contradiction:
Improvedetection speed of asynchrony eventsVSAvoidcomplexity of signal processing system
Core Design Contradiction:
SpeedVSDevice complexity

Solution Approach 1:

The patent replaces complex real-time waveform similarity matching algorithms with a pre-trained neural network inference system. The heavy computational work of pattern recognition is performed offline during training, while real-time operation uses the trained model for rapid classification. This substitution maintains high detection speed while reducing the complexity of real-time signal processing requirements.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The neural network model is trained in advance on extensive datasets of normal and abnormal patient-ventilator interactions. This preliminary action of offline training allows the system to rapidly classify new waveforms during real-time operation without performing complex similarity calculations, thereby achieving fast detection speed with reduced real-time computational complexity.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP3834871B1Computer program for ventilation trigger detection, ventilation trigger detection apparatus, and ventilation device
Publication Date: 2025.04.16 SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
  • EP3834871B1 patent drawingFigure 1A~1B
  • EP3834871B1 patent drawingFigure 2~4
  • EP3834871B1 patent drawingFigure 5~6

AI summary

A ventilation trigger detection method, applied to a ventilation device. The method includes: monitoring a ventilation parameter during mechanical ventilation for a user, the ventilation parameter including at least one of an airway pressure and an airway flow (101); and determining patient-ventilator synchrony during the ventilation according to a change in the ventilation parameter (102). Furthermore, this disclosure also relates to a ventilation trigger detection apparatus, a ventilation device, and a storage medium.