Ventilator Automatic Cardiac Massage Mode Detection

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Solution Overview

Problem

Current artificial ventilation devices during cardiac massage fail to automatically detect whether the massage is manual or automatic, leading to inadequate ventilation that may cause lung damage due to inconsistent compression frequencies and depths, which are not tailored to individual patients.

Innovation Solution

A medical ventilator equipped with measurement and signal processing means to determine the mode of cardiac massage (manual or automatic) and adjust ventilation parameters accordingly, using distinct pressure settings for each mode to ensure optimal lung protection and ventilation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If mechanical ventilation is applied during cardiac massage, then lung protection is improved by maintaining functional residual capacity, but the ventilation may be too violent for patients with automatic massage boards causing lung damage

Engineering Contradiction:

Improvelung protectionVSAvoidlung damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The ventilator dynamically adjusts ventilation parameters based on real-time detection of massage mode. When automatic massage is detected, the system modifies inspiratory pressure, flow rate, and tidal volume to prevent excessive rib cage displacement. This dynamic adaptation ensures lung protection is maintained while avoiding the harmful effects of fixed ventilation settings during automatic cardiac massage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes ventilation parameters (pressure, flow, volume) according to the detected massage mode. For automatic massage, inspiratory pressure is reduced and inspiratory time is extended to prevent violent rib cage excursions. This parameter modification resolves the contradiction by tailoring ventilation intensity to the specific massage context, protecting lungs from both collapse and over-expansion damage.

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If automated chest compression devices are used, then massage consistency is improved, but the same massage is delivered regardless of patient morphology causing potential lung injury

Engineering Contradiction:

Improvemassage consistencyVSAvoidlung injury

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The ventilator implements a feedback mechanism by continuously monitoring airflow and pressure signals to detect the presence and characteristics of cardiac massage. Based on this feedback, the system automatically identifies whether manual or automatic massage is being performed and adjusts ventilation parameters accordingly. This closed-loop control resolves the contradiction by making the ventilation responsive to the actual massage being delivered, preventing lung injury while maintaining massage consistency.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs self-adjustment by automatically detecting massage mode and modifying ventilation settings without external intervention. The ventilator monitors its own gas flow and pressure measurements, processes these signals to identify massage characteristics, and autonomously changes ventilation parameters to prevent lung damage. This self-service capability eliminates the need for manual configuration while protecting against the harmful effects of standardized automatic massage.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If manual cardiac massage is performed, then adaptation to patient morphology is improved, but compression frequency and depth are inconsistent leading to inadequate ventilation

Engineering Contradiction:

Improveadaptation to patient morphologyVSAvoidventilation effectiveness

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system replaces manual monitoring and adjustment of ventilation parameters with automated electronic detection and control. Pressure sensors and flow meters continuously monitor gas flow characteristics, and electronic processing algorithms automatically identify manual massage patterns. This substitution of mechanical/manual systems with electronic automation resolves the contradiction by providing both the adaptability to detect varied massage patterns and the productivity of automated parameter adjustment, ensuring effective ventilation despite inconsistent manual compression quality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP3299055B1Breathing assistance apparatus with automatic detection of manual or automatic cardiac massage mode

Publication Date: 2019.12.18 AIR LIQUIDE MEDICAL

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AI summary

The invention relates to a respiratory assistance device (1) comprising a gas circuit (2) designed to convey a gas flow, comprising measuring means (6) arranged to measure a flow parameter and configured to convert it into a flow signal, signal processing means (8) for processing said flow signal and for deducing information representative of a manual cardiac massage mode or an automatic cardiac massage mode, storage means (12) configured to store several ventilation modes comprising a first ventilation mode comprising first ventilation parameters (PB1, PH1) applicable in the case of manual cardiac massage, and a second ventilation mode comprising second ventilation parameters (PB2, PH2) applicable in the case of automatic cardiac massage, and ventilation mode selection means for retrieving and selecting within the storage means (12),the first or second memorized ventilation mode, depending on the representative information of a manual or automatic cardiac massage mode provided by the signal processing means (8).