Myoelectrically activated respiratory leak sealing
First Claim
1. A method for controlling an air seal between a ventilator air circuit and a patient'"'"'s respiratory airways, comprising:
- mounting an air seal modifier between the ventilator air circuit and the patient'"'"'s respiratory airways;
sensing myoelectrical activity of a respiratory-related muscle of the patient to produce a myoelectrical signal representative of respiratory effort of the patient;
analyzing the myoelectrical signal to produce an air seal controlling signal; and
controlling the air seal modifier in response to the air seal controlling signal to (a) seal the air seal between the ventilator air circuit and the patient'"'"'s respiratory airways during respiratory effort of the patient, and (b) unseal the air seal between the ventilator air circuit and the patient'"'"'s respiratory airways to allow gas leaks during relaxation of respiratory effort of the patient.
1 Assignment
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Accused Products
Abstract
The method and system are for sealing/unsealing (regulating) airway leaks occurring between the ventilator circuit and respiratory airways during lung ventilatory support in response to myoelectrical activity of diaphragm. Myolectrical 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 sealing/unsealing of airway leaks in relation to the myoelectrical signal, respiratory flow signal and/or respiratory pressure signal to assist respiration of the patient. The amplitude of the myoelectrical signal is compared to a given threshold, and airway leaks are sealed when the amplitude of the myoelectrical signal is higher than this threshold. Increment of myoelectrical signal amplitude can be also detected to trigger the airway leak regulating device to seal the airway leaks, while decrement of the myoelectrical signal amplitude can be detected to unseal the airway leaks and thus permit air evacuation from the patient'"'"'s lungs.
49 Citations
35 Claims
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1. A method for controlling an air seal between a ventilator air circuit and a patient'"'"'s respiratory airways, comprising:
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mounting an air seal modifier between the ventilator air circuit and the patient'"'"'s respiratory airways; sensing myoelectrical activity of a respiratory-related muscle of the patient to produce a myoelectrical signal representative of respiratory effort of the patient; analyzing the myoelectrical signal to produce an air seal controlling signal; and controlling the air seal modifier in response to the air seal controlling signal to (a) seal the air seal between the ventilator air circuit and the patient'"'"'s respiratory airways during respiratory effort of the patient, and (b) unseal the air seal between the ventilator air circuit and the patient'"'"'s respiratory airways to allow gas leaks during relaxation of respiratory effort of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for controlling an air seal between a ventilator air circuit and a patient'"'"'s respiratory airways, comprising:
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a modifier of the air seal; a sensor of a myoelectrical activity of a respiratory-related muscle of the patient to produce a myoelectrical signal representative of respiratory effort of the patient; an analyzer of the myoelectrical signal to produce an air seal controlling signal; and an air seal controller responsive to the air seal controlling signal to activate the air seal modifier for (a) sealing the air seal between the ventilator air circuit and the patient'"'"'s respiratory airways during respiratory effort of the patient, and (b) unsealing the air seal between the ventilator air circuit and the patient'"'"'s respiratory airways to allow gas leaks during relaxation of the respiratory effort of the patient. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A system for controlling an air seal between a ventilator air circuit and a patient'"'"'s respiratory airways, comprising:
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means for modifying the air seal; means for sensing myoelectrical activity of a respiratory related muscle of the patient to produce a myoelectrical signal representative of respiratory effort of the patient; means for analyzing the myoelectrical signal to produce an air seal controlling signal; and air seal control means responsive to the air seal controlling signal to activate the air seal modifying means for (a) sealing the air seal between the ventilator air circuit and the patient'"'"'s respiratory airways during respiratory effort of the patient, and (b) unsealing the air seal between the ventilator air circuit and the patient'"'"'s respiratory airways to allow gas leaks during relaxation of respiratory effort of the patient.
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Specification