Ventilator with error detection for flow sensors
Inventors
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Assignees
Member
Hamilton Medical Inc.Hamilton Medical is focused on the development, manufacturing, and training for advanced respiratory support technologies. The company provides intelligent ventilation systems, high flow oxygen therapy, noninvasive ventilation, and educational platforms for healthcare professionals. Their offerings emphasize patient safety, data-driven decision making, and regulatory compliance across intensive care, transport, neonatal, and emergency settings.
Hamilton Medical is focused on the development, manufacturing, and training for advanced respiratory support technologies. The company provides intelligent ventilation systems, high flow oxygen therapy, noninvasive ventilation, and educational platforms for healthcare professionals. Their offerings emphasize patient safety, data-driven decision making, and regulatory compliance across intensive care, transport, neonatal, and emergency settings.
Publication Number
US-10905838-B2
Publication Date
2021-02-02
Expiration Date
Abstract
The present artificial respiration ventilator (10) comprises, inter alia, a flow sensor arrangement (44, 48) for quantitatively detecting a gas flow in a breathing line arrangement (30), comprising a distal flow sensor (48) located farther from the patient end of the ventilation line arrangement (30). and a proximal flow sensor (44) located closer to the patient end of the ventilation line arrangement (30), and has a control device (18) at least for processing measurement signals of the flow sensor arrangement (44, 48), wherein the control device (18) is designed for error detection based on the measurement signals of the distal (48) and/or the proximal sensor (44). According to the invention, the control device (18) is designed to detect an error of the flow sensor arrangement (44, 48) on the basis of a comparison of a change value (62, 76) of a measurement signal (54, 58, 68, 72) of the one flow sensor (44) with a change value (60, 74) of a measurement signal (52, 56, 66, 70) of the respective other flow sensor (48) or/and with a measurement signal (54, 58, 68, 72) of the one flow sensor (44).
Core Innovation
A ventilation device for artificial respiration includes a breathing gas source and a ventilation line arrangement extending between the breathing gas source and a patient-side proximal end. The ventilation device further includes a valve assembly with an inspiratory valve and an expiratory valve, and a flow sensor arrangement for the quantitative detection of a gas flow, comprising a distal flow sensor located farther from the patient end and a proximal flow sensor located closer to the patient end.
A control device processes measurement signals of the flow sensor arrangement for error detection based on measurement signals of at least one of the distal and the proximal flow sensor. The control device detects an error of the flow sensor arrangement by comparing a change value of a measurement signal of one flow sensor with at least one of a change value of the respective other flow sensor and the measurement signal of the one flow sensor. The control device is adapted to detect a jump error using ratios of sums of consecutively occurring change values of the measurement signal for the proximal and distal flow sensors relative to predetermined reference variables and predetermined reference threshold values.
The control device evaluates change values of the measurement signals in a breath-by-breath manner and performs error detection for both rapid jump errors and slower drift errors. The control device applies smoothing to the measurement signals using weighted moving averages and/or higher-order digital filters to obtain change values suitable for evaluation.
Claims Coverage
The document provides one independent claim. The independent claim contains the core architecture with a ventilation device, distal and proximal flow sensors, and a control device, together with jump-error detection based on ratios of summed consecutively occurring change values relative to reference variables and predetermined reference threshold values.
Ventilation device with distal and proximal flow sensors for error detection
A ventilation device for artificial respiration with a breathing gas source, a ventilation line arrangement with an inspiratory valve and an expiratory valve, a flow sensor arrangement including a distal flow sensor and a proximal flow sensor, and a control device adapted to process measurement signals of the flow sensor arrangement for error detection based on measurement signals of at least one of the distal and the proximal flow sensor by comparing change values of the measurement signals.
Jump error detection using ratios of summed consecutive change values
A control device adapted to detect a jump error of the flow sensor arrangement when a ratio of a sum value of consecutively occurring change values of the measurement signal of the proximal flow sensor to a first reference variable exceeds a predetermined reference threshold value and when a ratio of a sum value of consecutively occurring change values of the measurement signal of the distal flow sensor to a second reference variable falls below a predetermined reference threshold value.
Claim coverage centers on a ventilation device including distal and proximal flow sensors whose measurement signals are processed for error detection by comparing change values, with jump-error detection specifically defined through ratio-based thresholding of summed consecutively occurring change values for proximal and distal sensors relative to predetermined reference variables.
Stated Advantages
Earlier/more reliable detection of both rapid jump errors and slower drift errors.
Continued operation of the sensor processing.
Documented Applications
Artificial respiration using an artificial respiration ventilator with a breathing line including distal and proximal flow sensors and a control device for flow sensor arrangement error detection.
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