Method for non-cooperative lung function diagnosis using ultrasound
First Claim
1. Device for lung function diagnosis without cooperation of a patient, comprisingan ultrasonic gas flow and molar mass sensor based upon a transit-time or time-of-flight method,an exchangeable or fixed flow tube having a mouthpiece,software used for tidal breathing analysis of a patient without cooperation of the patient by measuring flow, volume and molar mass, using a statistical method for analysis of said measured signals and subsequently deriving from results of the analysis a lung function status index for diagnostic or monitoring purposes, andinstructions provided on a computer-readable medium,structured and arranged to perform the analysis based on a single deep exhalation or a combination of quiet breathing and a single deep exhalation, by the patient,wherein the derived lung function status index is structured and arranged to be used for the diagnosis or prediction of COPD (chronic obstructive pulmonary disease) or asthma.
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Abstract
A method and device are provided for measuring state of lung function of a patient using ultrasonic flow and molar mass measurement. Flow and molar mass signals are recorded during tidal breathing without requiring patient cooperation. Statistical analysis of the recorded data in combination with anthropometirc data and/or data form a questionnaire can be used to diagnose various pulmonary ailments or diseases.
23 Citations
14 Claims
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1. Device for lung function diagnosis without cooperation of a patient, comprising
an ultrasonic gas flow and molar mass sensor based upon a transit-time or time-of-flight method, an exchangeable or fixed flow tube having a mouthpiece, software used for tidal breathing analysis of a patient without cooperation of the patient by measuring flow, volume and molar mass, using a statistical method for analysis of said measured signals and subsequently deriving from results of the analysis a lung function status index for diagnostic or monitoring purposes, and instructions provided on a computer-readable medium, structured and arranged to perform the analysis based on a single deep exhalation or a combination of quiet breathing and a single deep exhalation, by the patient, wherein the derived lung function status index is structured and arranged to be used for the diagnosis or prediction of COPD (chronic obstructive pulmonary disease) or asthma.
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8. Method for lung function diagnosis without cooperation of a patient, comprising the steps of
using a device including an ultrasonic gas flow and molar mass sensor based on a transit-time or time-of-flight method, an exchangeable or fixed flow tube with a mouthpiece, appropriate software used for tidal breathing analysis of a patient without cooperation of a patient and instructions provided on a computer-readable medium, measuring flow, volume and molar mass, using statistical method for analysis of said measured signals, subsequently deriving from results of the analysis, a lung function status index for diagnostic or monitoring purposes, basing on a single deep exhalation or a combination of quiet breathing and a single deep exhalation, and using the lung function status index for the diagnosis or prediction of COPD (chronic obstructive pulmonary disease) or asthma.
Specification