It Is Necessary To Remember That A Curve

It is necessary to remember that a curve of an average portion Stream or the forced stream of an exhalation, at 50 % volume of the exhaled Air of the patient (=FEV25-75 %), can fall below the lowermost Limit of normal values even when indicators FVC, FEV1 and FEV1/FVC % Have normal amounts. Lower values for indicator specifications FEV25-75 % can be and less than 50 % from average settlement (= ' due ') Sizes. It is the important feature of measurement can be used for Revealings of the bottom limits of individual normal values with Confidential interval of 95 % from average due size. However Sizes FEV25-75 very strongly depend on the general time of an exhalation. If Time of the forced exhalation the patient any way changes more than On 10 % after application it it is difficult To interpret. The truth and earlier end of a breath with application often moves a curve of the middle of the forced The exhaled volume to the exhalation beginning. Additional special researches with the help Estimation of vital capacity of lungs in position of the patient lying on a back: The estimation of force of a diaphragm can be executed through Measurement of vital capacity in vertical or a sitting position The patient and comparison of these indicators with the measurements made in Position of the patient lying on a back.