A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 5/08 (2006.01) A61B 5/087 (2006.01)
Patent
CA 2314926
A ASTHMA DEVICE FOR MEASURING AND GRADING ASTHMA IN INDIVIDUAL IN INVIVO ACCESSMENT OF HUMAN SUBJECT. THE DEVICE INVOLVES EIGHT PARAMETER ALGORITHM CONSISTING OF SYMPTOM COMPLEX, TREATMENT RESPONSE CHECKLIST, PLUS A SPIROMETER MEASUREMENT OF BRONCHIAL CALIBER FUNCTION. ASTHMA MEASUREMENT ALLOWS CLINICIANS THE ABILITY TO GRADE OR STAGE CLINICAL ASTHMA. PULMONARY BRONCHIAL FLOW IS MEASURED ALONG THE MODEL OF LAMINAR FLOW MECHANICS. VOLUME FLOW IS CALCULATED BY THE FORMULA <SEE FORMULA> Q RESULT HAS CLOSE AGREEMENT WITH PEAK EXPIRATION FLOW VALUE AS ASSERTAINED BY RESPIRATORY SPIROMETRY WHEN LAMINAR FLOW CONDITIONS EXIST. HENCE P.E.F. VALUES ARE A MEASUREMENT OF BRONCHIAL CALIBER FUNCTION, WHEN LAMINAR FLOW CONDITIONS ARE SATISIFIED. THE ADDITIVE ALGORITHM CHECKLIST IS LABELLED 'ASTHMA SCORE', WITH MEASURED P.E.F., IS KEYED AND DISPLAYED IN A HAND COMPUTER. ASTHMA MEASUREMENT ALLOWS CLINICAL STAGING BY TITERATING ASTHMA SCORE AND P.E.F. VALUES. A 163 PATIENT MEASURED ASTHMA STUDY PRODUCED THREE CATAGORIES OF ASTHMA STAGING BY ASTHMA SUBTYPES, WITH APPPROPRIATE CLINICAL LABELS BY SEVERITY: (a) MILD ASTHMA - P.E.F./ASTHMA SCORE > 80% (b) MODERATE/SEVERE ASTHMA - P.E.F./ASTHMA SCORE 35 - 75% (c) RESPIRATORY DISTRESS ASTHMA P.E.F./ASTHMA SCORE < 30%
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