Respiratory Assistance Device Chest Compression Frequency Correction
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Solution Overview
Problem
Existing respiratory assistance devices during cardiopulmonary resuscitation (CPR) often fail to accurately provide the frequency of chest compressions, leading to incorrect feedback for rescuers, complicating the process and potentially delaying patient care due to the need for additional equipment and complexity in device operation.
Innovation Solution
A respiratory assistance device that delivers respiratory gas at varying pressure levels, using signal processing to detect and correct the frequency of chest compressions by accounting for undetected compressions through virtual compression estimation, ensuring accurate feedback without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional devices are used to measure and display chest compression frequency, then measurement precision is improved, but device complexity increases and setup time increases
Solution Approach 1:
The patent combines the chest compression detection function with the existing respiratory assistance device by integrating measurement means and signal processing means into the ventilator system. This merging eliminates the need for separate external devices while maintaining accurate compression frequency measurement capability.
Solution Approach 2:
The respiratory assistance device is designed to perform multiple functions: it provides respiratory support through gas delivery while simultaneously measuring chest compression frequency and displaying feedback information. This multi-functionality reduces the overall equipment needed during CPR operations.
2Measurement precision
If additional devices are used to measure and display chest compression frequency, then measurement precision is improved, but setup time increases
Solution Approach 1:
By integrating the measurement and display functions into the existing respiratory assistance device that is already deployed for ventilation, the system eliminates the time required to set up and calibrate separate external measurement devices during the critical CPR procedure.
3Power
If gas is delivered at high pressure during chest compressions, then respiratory support is improved, but measurement precision deteriorates due to signal interference
Solution Approach 1:
The patent segments the measurement function from the gas delivery function by using separate measurement means that can independently detect chest compression signals. The signal processing means then analyzes these signals to distinguish between compression events and gas delivery pressure variations, maintaining both high-pressure gas delivery and accurate measurement.
Solution Approach 2:
The signal processing means acts as an intermediary that processes raw signals from the measurement means, filtering out interference from gas delivery pressure variations to extract accurate chest compression frequency information. This intermediary processing enables reliable detection despite the presence of high-pressure gas delivery.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides reliable and accurate chest compression frequency information, helping rescuers maintain the recommended 100 compressions per minute, thereby improving CPR effectiveness and simplifying the rescue process.
Implementation Method 1
a source of gas (4) able to deliver a flow of respiratory gas in a ventilatory circuit (2) intended to be connected to a patient, the flow of respiratory gas being delivered by said source of gas (4) so as to generate and maintain several levels of pressure of gas (Ph, Pb), for prefixed durations (Dh, Db)
Implementation Method 2
measurement means (6) suitable for and designed to measure at least one flow parameter representative of the gas flow chosen from gas pressure and gas flow rate, and to deliver at least one flow signal representative of said flow parameter
Implementation Method 3
signal processing means (5) designed for and capable of, that is to say configured to: i) analyze and deduce from said flow signal, an existence or an absence of chest compressions performed on said patient, ii) determining the frequency value (F) of said chest compressions in the event of existence of chest compressions
Data Source
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AI summary
The invention relates to a respiratory assistance device (1) usable by a first responder, such as a paramedic, firefighter, nurse, or similar professional, when performing cardiac massage on a person (20) in cardiopulmonary arrest, to ventilate said person while they are undergoing chest compressions. According to the invention, the respiratory assistance device (1) includes signal processing means adapted to provide the display means with a corrected frequency value (Fc) corresponding to the frequency value (F) determined immediately before the start of a considered duration (Dh, Db), when the signal processing means do not detect chest compressions (CT) during a portion of said duration (Dh, Db).