Microprocessor system for the simplified diagnosis of sleep apnea
First Claim
1. A device for determining the respiratory status of a patient, the device comprising:
- a ventilation indexing oximeter including;
a. a ventilation measurement device for generating a first result indicative of the volume of at least one gas ventilated as a function of time, b. an oximeter for generating a second result indicative of the oxygen saturation of human blood, and c. a microprocessor programmed for comparing the first result with the second result to generate a third result indicative of both the first result and the second result.
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Abstract
A method of evaluating a patient with sleep apnea includes monitoring a patient to produce at least one timed waveform of at least one physiologic parameter, identifying along the waveform a first waveform variation indicative of an apnea, identifying along the waveform a second waveform variation indicative of another apnea, determining the interval intermediate at least one portion of the first waveform variation and at least one portion of the second waveform, and assessing the severity of sleep apnea based on at least the determining. A device for determining the severity of sleep apnea comprises a monitor capable of generating a signal indicative of at least one physiologic parameter and a processor capable of processing the signal, the processor operating to generate a timed waveform of the parameter and to identify a plurality of sequential waveform variations indicative of a corresponding plurality of sequential apneas, the sequential waveform variations having temporal and spatial relationships between the waveform variations and along the waveform, the processor further operating to determine at least one of the temporal and the spatial relationships and displaying the determining so that the determining can be used to assess the severity of sleep apnea.
306 Citations
35 Claims
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1. A device for determining the respiratory status of a patient, the device comprising:
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a ventilation indexing oximeter including;
a. a ventilation measurement device for generating a first result indicative of the volume of at least one gas ventilated as a function of time, b. an oximeter for generating a second result indicative of the oxygen saturation of human blood, and c. a microprocessor programmed for comparing the first result with the second result to generate a third result indicative of both the first result and the second result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of assessing gas exchange of the respiratory system of a patient, the method comprising:
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a. using a flow measuring device, measuring a volume of at least one ventilated gas over a first time interval to derive a first result, the result being substantially equal to the volume of the at least one gas ventilated by the patient during the first interval, b. using an oximeter, measuring the oxygen saturation of arterial blood over a second time interval to derive a second result, the second result corresponding to the oxygen saturation of arterial blood induced by the first result; and
c. using a computer, comparing the first result with the second result to derive a third result indicative of both the second result and the first result. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification