Variability of Breathing Pattern

摘要: When studying the performance of any control system, it is important to know not only mean response system but also constancy with which that maintained. Research into breathing, however, has been largely confined analysis an experimental intervention, and little or no attention paid “tightness” response. In recent edition Handbook Physiology, Cherniack et al. [1] state “the normal variability breathing studied by a few investigators”; moreover, studies pattern in patients disease states are almost nonexistent. Investigation respiratory over prolonged periods now feasible since can be recorded nonobtrusive manner using devices record motion rib cage abdomen which, turn, calibrated provide measure tidal volume [2, 3], employing [4–6]. Respiratory drive assessed on breath-by-breath basis calculating inspiratory flow (V T/T I) [4, 7]. addition, timing function measuring frequency fractional time (I I/TTOT). This repiratory center differs from its certain stimuli [8, 9].