Ventilatory assistance using an external effort sensor
First Claim
Patent Images
1. A method for controlling a mechanical ventilator comprising the steps of:
- providing a subject with breathable gas at controllable pressure;
providing a patient mountable source of light targeting a suprasternal notch of the subject;
deriving a measure of respiratory effort from the movement of the skin of the suprasternal notch only from a reflection of light from said notch; and
adjusting said controllable pressure in relation to a reference pressure in accordance with said measure of respiratory effort.
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Accused Products
Abstract
An optical sensor mountable on a patient and targets the supranasternal notch for detecting skin movement by dint of reflected light indicating respiratory effort. The sensor is used in conjunction with a ventilator to provide artificial ventilation support.
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Citations
27 Claims
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1. A method for controlling a mechanical ventilator comprising the steps of:
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providing a subject with breathable gas at controllable pressure;
providing a patient mountable source of light targeting a suprasternal notch of the subject;
deriving a measure of respiratory effort from the movement of the skin of the suprasternal notch only from a reflection of light from said notch; and
adjusting said controllable pressure in relation to a reference pressure in accordance with said measure of respiratory effort. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling a mechanical ventilator comprising the steps of:
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providing a subject with breathable gas at controllable pressure;
providing a patient mountable source of light targeting a suprasternal notch of the subject;
deriving a measure of respiratory effort from movement of a subject'"'"'s skin only as a function of light reflected from the suprasternal notch of the subject; and
adjusting said controllable pressure to be the sum of a first pressure plus a second pressure proportional to the respiratory effort. - View Dependent Claims (11, 12)
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13. A method for controlling a mechanical ventilator comprising the steps of:
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providing a subject with breathable gas at controllable pressure;
providing a patient mountable source of light targeting a suprasternal notch of the subject;
deriving a measure of a varying degree of inspiratory and expiratory respiratory effort from movement of the subject'"'"'s skin only as a function of light reflected from the suprasternal notch of the subject; and
adjusting said controllable pressure by servo-controlling the measure of the varying degree of inspiratory and expiratory respiratory effort to be zero. - View Dependent Claims (14)
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15. A mechanical ventilator to provide ventilatory support comprising:
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a source of breathable gas at a controllable pressure for a subject;
a patient mountable source of light targeting a suprasternal notch of the subject;
a transducer to measure respiratory effort from movement of skin of a suprasternal notch only from a reflection of light from said notch; and
a controller that responds to said transducer and adjusts said controllable pressure in relation to a reference pressure in accordance with the measure of respiratory effort. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A mechanical ventilator comprising:
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a source of breathable gas at a controllable pressure;
a source of light mountable to the patient'"'"'s body to target a suprasternal notch of the subject;
a transducer for measuring a varying degree of inspiratory and expiratory respiratory effort from movement of a subject'"'"'s skin only as a function of light reflected from the suprasternal notch of the subject; and
a controller that responds to said transducer and adjusts said controllable pressure to be a sum of a first pressure plus a second pressure proportional to the varying degree of inspiratory and expiratory respiratory effort from said transducer. - View Dependent Claims (25)
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26. A mechanical ventilator comprising:
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a source of breathable gas at a controllable pressure;
a source of light mountable to the patient'"'"'s body to target a suprasternal notch of the subject;
a transducer for measuring a varying degree of inspiratory and expiratory respiratory effort from movement of a subject'"'"'s skin only as a function of light reflected from the suprasternal notch of the subject; and
a controller that responds to said transducer and adjusts said controllable pressure by servo-controlling the varying degree of inspiratory and expiratory respiratory effort to be zero. - View Dependent Claims (27)
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Specification