One second rate
The rate (いちびょうりつ) is one of the items of the examination of breathing function for one second and is a ratio of quantity (one second quantity) discharged in air quantity (forced vital capacity) that is called when I make an effort (with power) and discharged breath for first one second. I mean that the bronchus becomes constricted when this ratio decreases, and air cannot flow smoothly and show a drop in a bronchial asthma patient and occlusive lung disease patients such as the pulmonary emphysema. I measure the lungs, a thorax, the diaphragmatic elasticity, the strength of the respiratory muscle. The calculating formula is as follows.
One second rate (%) = one second quantity ÷ forced vital capacity *100
It has physiological significance I make an effort then, and to spit out. Because thorax internal pressure increases by a summons effort, the bronchus is pressed, and this is because confinement becomes clearer (quantity of summons becomes less than the resting period in the original ordinary men by the effort-related summons). Conversely I mean that slow breathing helps the improvement of the breathing function deeply by the disease that a rate decreases for one second.
Is transcribed into .0% of FEV1 as sketchy description expression; abbreviation of forced expiratory volume 1.0 (sec) %. Normal level is more than 70%. The smoker reflects chronic pulmonary emphysema and is often less than normal level.
This article is taken from the Japanese Wikipedia One second rate
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