| Popis: |
The lessened vital capacity in intrathoracic diseases and the recommendation that vital capacity be used as a test of physical fitness have renewed interest in the question of normal standards for vital capacity. The vital capacity varies greatly even among healthy individuals, and some of the factors which accompany these variations are known. Among them are the sex, weight, height, size of the chest, age and general physical fitness. The clinician desires a normal standard with which he may compare the vital capacity of his patient. Would he do better, for example, to compare it with the average for individuals of the same height, of the same weight or of the same chest measurements; or should he use some combination of these? Obviously, that standard is best which shows the least variation among normal individuals. The convenience of the standard also deserves some consideration, for a convenient standard is more |
