Respiratory diagnostic device
AssigneesUniversite Joseph Fourier, Assistance Publique
InventorsPierre-Yves Gumery, Laurent Heyer
Life of this patent
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Abstract
The invention relates to a device for analyzing a patient's respiratory status, including: means for determining electromyographic activity (EMG-AN) at the wings of the patient's nose and the start of nasal contractions; means for determining electromyographic activity (EMG-THO) at the patient's thorax and the start of thoracic inspiratory contractions; means for determining the rostro-caudal delay between the start of the nasal contractions and the start of the thoracic inspiratory contractions; means for comparing the delay to a threshold; and means for supplying an alarm signal when the delay is above said threshold.
Claims7
A device for analyzing a patient's respiratory state, comprising:
- a first analog-to-digital converter to convert a signal representative of electromyographic activity (EMG-AN) at a level of alae of a patient's nose and a beginning of nasal contractions to provide a first digitized signal;
- a second analog-to-digital converter to convert a signal representative of electromyographic activity (EMG-THO) at a level of the patient's thorax and a beginning of thoracic inspiratory contractions to provide a second digitized signal;
- and
- a processor, operatively connected to the first and second analog-to-digital converters, operative to:
- determine rostro-caudal delay between the beginnings of the nasal contractions of the first digitized signal and of the thoracic inspiratory contractions of the second digitized signal;
- compare said delay with a threshold;
- and
- generate an alarm signal when said delay is greater than said threshold.
A device for controlling a respiratory ventilator comprising:
- a first analog-to-digital converter to convert a signal representative of electromyographic activity (EMG-AN) at a level of alae of a patient's nose and a beginning of nasal contractions to provide a first digitized signal;
- a second analog-to-digital converter to convert a signal representative of determining electromyographic activity (EMG-THO) at a level of the patient's thorax and a beginning of thoracic inspiratory contractions to provide a second digitized signal;
- and
- a processor, operatively connected to the first and second analog-to-digital converters, operative to:
- determine rostro-caudal delay between the beginnings of the nasal contractions of the first digitized signal and of the thoracic inspiratory contractions of the second digitized signal;
- compare said delay with a threshold;
- and
- provide a signal authorizing the ventilator to be stopped when said delay is smaller than said threshold.
Dependencies are inferred from the claim text.