Method of detecting and predicting neurocardiogenic syncope
First Claim
1. A method of detecting an impending neurocardiogenic syncope in a patient, comprising the steps of:
- obtaining at least one sample of baseline minute ventilation, tidal volume and respiratory rate of the patient;
detecting an increase in tidal volume over a predetermined period of respiration;
detecting an increase in minute ventilation over said predetermined period of respiration;
detecting any change in respiratory rate over said predetermined period of respiration;
storing at least one data associated with the increase in minute ventilation; and
detecting impending syncope when(a) the increase in minute ventilation is attributable to an increase in tidal volume; and
(b) the change in respiratory rate is less than 25% in relation to the at least one sampled baseline respiratory rate during the predetermined period of respiration, wherein the steps of detecting an increase in minute ventilation, detecting an increase in tidal volume, detecting any change in respiratory rate, and detecting impending syncope each occur, at least in part, in a microprocessor.
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Accused Products
Abstract
A method of detecting an early onset of neurocardiogenic syncope in a patient uses respiratory functions as a predictor of the syncope. According to the method, at least one sample of baseline minute ventilation, tidal volume and respiratory rate of the patient is obtained. The detection unit is set to detect an increase in tidal volume and in minute ventilation over a predetermined respiratory period. The detecting unit also detects any rate of change in respiratory rate and sends a signal to a microprocessor to determine whether the increase in minute ventilation is a sole function of increased tidal volume. The impending syncope is diagnosed if variance in respiratory rate is less than 25% in relation to the sampled baseline during the predetermined period of time.
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Citations
16 Claims
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1. A method of detecting an impending neurocardiogenic syncope in a patient, comprising the steps of:
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obtaining at least one sample of baseline minute ventilation, tidal volume and respiratory rate of the patient; detecting an increase in tidal volume over a predetermined period of respiration; detecting an increase in minute ventilation over said predetermined period of respiration; detecting any change in respiratory rate over said predetermined period of respiration; storing at least one data associated with the increase in minute ventilation; and detecting impending syncope when (a) the increase in minute ventilation is attributable to an increase in tidal volume; and (b) the change in respiratory rate is less than 25% in relation to the at least one sampled baseline respiratory rate during the predetermined period of respiration, wherein the steps of detecting an increase in minute ventilation, detecting an increase in tidal volume, detecting any change in respiratory rate, and detecting impending syncope each occur, at least in part, in a microprocessor. - View Dependent Claims (2, 3, 4, 5)
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6. A method of preventing neurocardiogenic syncope in operators of equipment, comprising the steps of:
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obtaining at least one sample of baseline minute ventilation, tidal volume and respiratory rate of the equipment operator; detecting an increase in tidal volume over a predetermined period of respiration of said equipment operator; detecting an increase in minute ventilation over said predetermined period of respiration of said equipment operator; detecting any change in respiratory rate over said predetermined period of respiration of said equipment operator; storing at least one data associated with the increase in minute ventilation; and alerting the equipment operator of impending syncope when (a) the increase in minute ventilation is attributable to an increase in tidal volume; and (b) the change in respiratory rate is less than 25% in relation to the at least one sampled baseline respiratory rate during the predetermined period of respiration, wherein the steps of detecting an increase in minute ventilation, detecting an increase in tidal volume, and detecting any change in respiratory rate each occur, at least in part, in a microprocessor. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method of detecting impending neurocardiogenic syncope in a patient, said method comprising:
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obtaining a sample baseline minute ventilation, tidal volume, and respiratory rate from the patient; obtaining a second minute ventilation, tidal volume, and respiratory rate from the patient over a predetermined period of time; and detecting impending syncope in the patient by (a) detecting an increase in minute ventilation, attributable to an increase in tidal volume, between said second minute ventilation and said baseline minute ventilation; and (b) detecting a change in respiratory rate between said second respiratory rate and said baseline respiratory rate of less than 25%, wherein the steps of detecting an increase in minute ventilation, detecting a change in respiratory rate, and detecting impending syncope each occur, at least in part, in a microprocessor. - View Dependent Claims (13, 14, 15, 16)
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Specification