Apparatus to measure and record peak air passage pressure
First Claim
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1. An apparatus for measuring lung function of a subject, comprising:
- air passage means for receiving an exhalation of the subject;
pressure sensing means for producing signals of the pressure in said air passage means during said exhalation;
means for processing said signals to derive a peak value of the signal;
means for comparing a plurality of peak values from the respective signals from a succession of exhalations within a predetermined time period;
means responsive to said means for comparing for selecting a plurality of the highest peak values from the compared plurality of peak values;
means for storing said selected peak values; and
means for reading said stored peak values from said storing means.
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Abstract
The apparatus measure the exhalation of a subject and stores selected data relating to the peak value of the air pressure during exhalation. The storing unit for the data stores the peak values for a plurality of time periods and the apparatus can collect a series of measurements over an extended time period. Auxiliary information and data relating to each measurement can also be stored in the storing unit. A dedicated power source may be incorporated for holding the stored information in the storing unit.
66 Citations
10 Claims
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1. An apparatus for measuring lung function of a subject, comprising:
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air passage means for receiving an exhalation of the subject; pressure sensing means for producing signals of the pressure in said air passage means during said exhalation; means for processing said signals to derive a peak value of the signal; means for comparing a plurality of peak values from the respective signals from a succession of exhalations within a predetermined time period; means responsive to said means for comparing for selecting a plurality of the highest peak values from the compared plurality of peak values; means for storing said selected peak values; and means for reading said stored peak values from said storing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. An apparatus according to claim 9, further comprising a readout means having a pointer and an associated scale;
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a separate display panel connected to said processing means for displaying peak flow results and reminder information.
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Specification