RELATION SHIP BETWEEN FEVI% AND PEF% IN PATIENTS WITH OBSTRUCTIVE AIR WAY DISEASES

*Dr. Rokan M. Fadhil and Dr. Mohammad H. Fairs

ABSTRACT

Spirometry is the recommended investigation for diagnosis and categorization of the severity of the air flow limitation, however spirometry is not widely availably, while PEF instrument is cheep portable and easy to operate and maintain, so the PEF is frequently proposed as alternative to FEVI for this purpose, and widely used in general practice as a surrogate for FEVI in assessment of airway obstruction disease. The aims of this prospective study were to evaluate the correlation between FEVI and peak expiratory flow (PEF) values expressed as a percentage of their predicted value; and to assess the factors influencing differences between these two measurements. This study was took place between Ist December 2016 and 1st July 2017 in Baquba teaching hospital. A total of 100 Patients with history suggestive of obstructive airway diseases (gave symptoms of cough, wheezes, shortness of breathe, chest tightness), and their pulmonary function test show obstructive pattern (FEV1/FVC<70%). They were 60(60%) male and 40(40%) female, their age ranged from (16 -82 years) with mean ± SD (51.1±16.51). Careful detailed history and physical examination (including age gender, height and weight), and pulmonary function test were carried out. In order to study the relationship between FEVI% and PEF% we:-  Compare the value of low FEVI% (<80% of predicted value) with low PEF 80% of predicted value) in relation to diagnosis of obstructive air way diseases.  In order to see the concordance between FEVI% and PEF% in categorization of severity of airway obstruction we:-

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