METHODS AND DEVICES FOR SENSING RESPIRATION AND CONTROLLING VENTILATOR FUNCTIONS
First Claim
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1. An apparatus for sensing respiration and synchronizing a ventilator to the respiration of a patient, the apparatus comprising:
- a plurality of thermal breath sensors; and
wherein at least one of the plurality of thermal breath sensors is a heated thermal breath sensor.
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Abstract
Improved methods and devices are described for sensing the respiration pattern of a patient and controlling ventilator functions, particularly for use in an open ventilation system. An apparatus for sensing respiration and synchronizing a ventilator to the respiration of a patient is described. The apparatus may include a plurality of thermal breath sensors. At least one of the plurality of thermal breath sensors may be a heated thermal breath sensor.
30 Citations
20 Claims
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1. An apparatus for sensing respiration and synchronizing a ventilator to the respiration of a patient, the apparatus comprising:
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a plurality of thermal breath sensors; and wherein at least one of the plurality of thermal breath sensors is a heated thermal breath sensor. - View Dependent Claims (2, 3, 4, 5, 6, 20)
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7. An apparatus for sensing respiration and synchronizing a ventilator to the respiration of a patient, the apparatus comprising:
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at least three thermal breath sensors; wherein a first thermal breath sensor measures temperature in an airway of the patient, a second thermal breath sensor measures temperature at or near the opening of an airway of the patient, and a third thermal breath sensor measures ambient temperature; wherein signals from the first thermal breath sensor and the second thermal breath sensor are initially compared to a signal from the third thermal breath sensor to determine if inspired ambient air should be warmer or cooler than body temperature, and wherein the initial signal comparison defines an inspiratory phase and an expiratory phase associated with the signals from the first thermal breath sensor and the second thermal breath sensor; and wherein the signals from the first thermal breath sensor and the second thermal breath sensor are subsequently compared to each other to compensate for drift and artifacts, and wherein the subsequent signal comparison is used to determine true patterns, phases and timing of the patient'"'"'s respiration. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus for sensing respiration and synchronizing a ventilator to the respiration of a patient, the apparatus comprising:
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a ventilation tube to deliver gas to the patient; wherein the ventilation tube further comprises a ventilation gas delivery channel to deliver gas to the patient; and a breath sensing conduit in communication with an airway of the patient, wherein a thermal breath sensor is positioned in series with the breath sensing conduit. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification