US 6,588,423 B1 · Method and device responsive to myoelectrical activity for triggering ventilatory support

Abstract

A method and device for triggering ventilatory support to assist the patient's respiration. Myoelectrical activity of a patient's respiratory-related muscle is sensed to detect respiratory effort, and to produce a myoelectrical signal representative of the sensed muscle myoelectrical activity. Respiratory flow and pressure can also be measured to produce respective respiratory pressure and respiratory flow signals. A logic trigger circuit triggers ventilatory support in relation to the myoelectrical signal, respiratory flow signal and/or respiratory pressure signal to assist respiration of the patient. The amplitude of the myolectrical signal is compared to a given threshold, and ventilatory support is triggered when the amplitude of the myoelectrical signal is higher than this threshold. Increment of myoelectrical signal amplitude can also be detected to trigger ventilatory support, while decrement of the myoelectrical signal amplitude can be detected to request non-triggering of the ventilatory support.

Claims24

Dependent claims

A method for triggering ventilatory support from a ventilatory apparatus connected to a patient's respiratory system to assist respiration of said patient, comprising:

sensing myoelectrical activity of a respiratory-related muscle of the patient, to thereby detect respiratory effort of said patient;
in response to the sensed muscle myoelectrical activity, calculating a real-time myoelectrical signal representative of a level or change in respiratory effort;
and
activating/deactivating ventilatory support in relation to the myoelectrical signal to synchronise, in real-time, activating/deactivating of the ventilatory support to the patient with respiratory effort of said patient, said activating/deactivating of ventilatory support comprising:
comparing an amplitude, integral, derivative or combination thereof related to the myoelectrical signal to a given threshold;
and
activating ventilatory support when said amplitude, integral, derivative or combination thereof is higher than said given threshold.

4 more elements

A method for triggering ventilatory support from a ventilatory apparatus connected to a patient's respiratory system to assist respiration of said patient, comprising:

sensing myoelectrical activity of a respiratory-related muscle of the patient, to thereby detect respiratory effort of said patient;
in response to the sensed muscle myoelectrical activity, calculating a real-time myoelectrical signal representative of a level or change in respiratory effort;
and
activating/deactivating ventilatory support in relation to the myoelectrical signal to synchronise, in real-time, activating/deactivating of the ventilatory support to the patient with respiratory effort of said patient, wherein activating/deactivating of ventilatory support comprises:
detecting an increment of an amplitude, integral, derivative or combination thereof related to the myoelectrical signal;
and
activating ventilatory support in response to detection of said increment.

4 more elements

A method for triggering ventilatory support from a ventilatory apparatus connected to a patient's respiratory system to assist respiration of said patient, comprising:

sensing myoelectrical activity of a respiratory-related muscle of the patient, to thereby detect respiratory effort of said patient;
in response to the sensed muscle myoelectrical activity, calculating a real-time myoelectrical signal representative of a level or change in respiratory effort;
and
activating/deactivating ventilatory support in relation to the myoelectrical signal to synchronise, in real-time, activating/deactivating of the ventilatory support to the patient with respiratory effort of said patient, wherein activating/deactivating of ventilatory support comprises:
comparing an amplitude, integral, derivative or combination thereof related to the myoelectrical signal to a given threshold;
and
deactivating ventilatory support when said amplitude, integral, derivative or combination thereof is lower than said given threshold.

4 more elements

A method for triggering ventilatory support from a ventilatory apparatus connected to a patient's respiratory system to assist respiration of said patient, comprising:

sensing myoelectrical activity of a respiratory-related muscle of the patient, to thereby detect respiratory effort of said patient;
in response to the sensed muscle myoelectrical activity, calculating a real-time myoelectrical signal representative of a level or change in respiratory effort;
and
activating/deactivating ventilatory support in relation to the myoelectrical signal to synchronise, in real-time, activating/deactivating of the ventilatory support to the patient with respiratory effort of said patient, wherein activating/deactivating of ventilatory support comprises:
detecting a decrement of an amplitude, integral, derivative or combination thereof related to the myoelectrical signal;
and
deactivating ventilatory support in response to detection of said decrement.

4 more elements

A device for triggering ventilatory support from a ventilatory apparatus connected to a patient's respiratory-system to assist respiration of said patient, comprising:

sensor means for sensing myoelectrical activity of a respiratory-related muscle of the patient, to thereby detect respiratory effort of said patient;
means for calculating, in response to the sensed muscle myoelectrical activity, a real-time myoelectrical signal representative of a level or change in respiratory effort;
and
means for activating/deactivating ventilatory support in relation to the myoelectrical signal to synchronise, in real-time, activating/deactivating of the ventilatory support to the patient with respiratory effort of said patient, said activating/deactivating means comprising:
means for comparing an amplitude, integral, derivative or combination thereof related to the myoelectrical signal to a given threshold;
and
means for activating ventilatory support when said amplitude, integral, derivative or combination thereof is higher than said given threshold.

4 more elements

A device for triggering ventilatory support from a ventilatory apparatus connected to a patient's respiratory system to assist respiration of said patient, comprising:

sensor means for sensing myoelectrical activity of a respiratory-related muscle of the patient, to thereby detect respiratory effort of said patient;
means for calculating, in response to the sensed muscle myoelectrical activity, a real-time myoelectrical signal representative of a level or change in respiratory effort;
and
means for activating/deactivating ventilatory support in relation to the myoelectrical signal to synchronise, in real-time, activating/deactivating of the ventilatory support to the patient with respiratory effort of said patient, wherein the activating/deactivating means comprises:
means for detecting an increment of an amplitude, integral, derivative or combination thereof related to the myoelectrical signal;
and
means for activating ventilatory support in response to detection of said increment.

4 more elements

A device for triggering ventilatory support from a ventilatory apparatus connected to a patient's respiratory system to assist respiration of said patient, comprising:

sensor means for sensing myoelectrical activity of a respiratory-related muscle of the patient, to thereby detect respiratory effort of said patient;
means for calculating, in response to the sensed muscle myoelectrical activity, a real-time myoelectrical signal representative of a level or change in respiratory effort;
and
means for activating/deactivating ventilatory support in relation to the myoelectrical signal to synchronise, in real-time, activating/deactivating of the ventilatory support to the patient with respiratory effort of said patient, wherein the activating/deactivating means comprises:
means for comparing an amplitude, integral, derivative or combination thereof related to the myoelectrical signal to a given threshold;
and
means for deactivating ventilatory support when said amplitude, integral, derivative or combination thereof is lower than said given threshold.

4 more elements

A device for triggering ventilatory support from a ventilatory apparatus connected to a patient's respiratory system to assist respiration of said patient, comprising:

sensor means for sensing myoelectrical activity of a respiratory-related muscle of the patient, to thereby detect respiratory effort of said patient;
means for calculating, in response to the sensed muscle myoelectrical activity, a real-time myoelectrical signal representative of a level or change in respiratory effort;
and
means for activating/deactivating ventilatory support in relation to the myoelectrical signal to synchronise, in real-time, activating/deactivating of the ventilatory support to the patient with respiratory effort of said patient, wherein the activating/deactivating means comprises:
means for detecting a decrement of an amplitude, integral, derivative or combination thereof related to the myoelectrical signal;
and
means for deactivating the ventilatory support in response to detection of said decrement.

4 more elements

Dependencies are inferred from the claim text.

Method and device responsive to myoelectrical activity for triggering ventilatory support

Life of this patent

Method and device responsive to myoelectrical activity for triggering ventilatory support

Life of this patent

Abstract

Claims24