Method and system for validating inspiratory muscle activity of a patient, and mechanical ventilation system using the same
Inventors
Sinderby, Christer • Beck, Jennifer • Comtois, Norman
Assignees
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Publication Number
US-10517528-B2
Publication Date
2019-12-31
Expiration Date
Abstract
The present disclosure relates to a method and a system for validating inspiratory muscle activity of a patient. Left and right electrical activity signals respectively representing activity of a left muscle and of a right muscle synchronized with an inspiratory effort of the patient are acquired from non-invasive sensors. A cardiac activity signal is extracted from the left and right electrical activity signals. A synchrony, a symmetry or a proportionality of the left and right electrical activity signals from which the cardiac activity signal is extracted is verified. A mechanical ventilation system incorporating the system for validating inspiratory muscle activity of the patient is also disclosed.
Core Innovation
The invention validates measurements of an inspiratory muscle activity of a patient by acquiring, from non-invasive sensors, left and right electrical activity signals respectively representing activity of a left muscle and of a right muscle synchronized with an inspiratory effort of the patient. A cardiac activity signal is extracted from the left and right electrical activity signals, and the validity of the inspiratory muscle activity measurements is determined based on at least one of synchrony, symmetry, or proportionality of the left and right electrical activity signals from which the cardiac activity signal is extracted.
The method uses relationships between the left and right electrical activity signals as a validity check for the cardiac signal extraction. The validity determination uses synchrony, symmetry, or proportionality between the left and right electrical activity signals.
The validated measurements of inspiratory muscle activity are used to control a mechanical ventilator providing ventilatory assist to the patient via a breathing tube. In a non-invasive validation approach, the extraction and verification of the left/right electrical activity signals support determining whether the measurements are valid, enabling control of ventilation based at least in part on the determination of validity.
Claims Coverage
The document contains two independent claims, a method and a system. The main inventive features across these independent claims are synchronized non-invasive left/right electrical signal acquisition, cardiac activity signal extraction, validity verification using synchrony, symmetry, or proportionality, and controlling a mechanical ventilator based on the validity determination.
Validating inspiratory muscle measurements using synchronized non-invasive left and right electrical signals
A method of validating measurements of an inspiratory muscle activity by acquiring, from non-invasive sensors, left and right electrical activity signals respectively representing activity of a left muscle and of a right muscle synchronized with an inspiratory effort of the patient.
Extracting a cardiac activity signal from left and right electrical activity signals
Extracting a cardiac activity signal from the left and right electrical activity signals.
Determining validity based on synchrony, symmetry or proportionality between left and right signals
Determining whether the measurements of the inspiratory muscle activity are valid based on at least one of synchrony, symmetry, or proportionality of the left and right electrical activity signals from which the cardiac activity signal is extracted.
Controlling a mechanical ventilator based on the validity determination
Controlling a mechanical ventilator providing ventilatory assist via a breathing tube based at least in part on a determination that the measurements of the inspiratory muscle activity are valid.
System validating inspiratory muscle measurements using non-invasive left/right sensors and cardiac extraction
A system comprising non-invasive sensors configured to acquire synchronized inspiratory-effort left and right electrical activity signals representing activity of a left muscle and of a right muscle; an extractor of a cardiac activity signal from the left and right electrical activity signals; and a controller controlling a mechanical ventilator based at least in part on a determination that the measurements are valid.
Comparator-based verification of synchrony, symmetry or proportionality for cardiac extraction validity
A first comparator configured to verify at least one of synchrony, symmetry, or proportionality of the left and right electrical activity signals from which the cardiac activity signal is extracted, with a determiner responsive to the verification to determine whether the measurements are valid.
Ventilatory assist via breathing tube controlled by a controller based on validity
A mechanical ventilator and a breathing tube providing ventilatory assist, wherein the controller controls the mechanical ventilator based at least in part on a determination that the measurements are valid.
Across the independent claims, the invention centers on using synchronized non-invasive left/right electrical activity signals, extracting a cardiac activity signal, verifying validity using synchrony, symmetry, or proportionality between the left/right signals used for cardiac extraction, and controlling a mechanical ventilator based on the resulting validity determination.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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