buylotrogold

In thinking about it, scaling is normalization running backwards. Guyton et.al. consider normalization for cardiac output and this might be extended to other attributes. Cardiac Index ========================================================== Cardiac index is cardiac output normalized by body surface area.   CI = CO / BSA                                                 (1) where   CI = Cardiac Index ((L/Min)/M^2)   CO = Cardiac Output (L/Min)   BSA = Body Surface Area (M^2) Textbook values are CI equal to 3.5 and BSA equal to 1.73 for a CO of CO of 6.0 L/Min. HumMod gives us   W = 72.4 kG   H = 178 cM   Age = 37 years   BSA = 1.9 M^2   CO = 5.5 L/Min   CI = 2.9 (L/Min)/M^2 Note that cardiac index decreases with age (more on this below) and default HumMod is 37 years old. Body Surface Area ======================================================= DuBois and DuBois (1916) give us   BSA = W^0.425 * H^0.725 * C   BSA = Area in cM^2   W = Weight in kG   H = Height in cM   C = Constant 71.84 Reduce C to 0.007184 to get area in M^2. Cardiac Index And Age =================================================== Use the data of Brandfonbrener et.al. to see the effect of age on cardiac index. I read the following values off a graph (will look at the original later).   Age   CI %vs.40