摘要: One of history’s purposes is to teach us lessons in how avoid the errors past. I feel that urodynamics seems have “gone clinical” too eagerly and has devoted itself much problems lower urinary tract, commendably, but neglect ureter renal pelvis. Homeostasis chemical composition bodily fluids, very medium for life itself, depends upon function thus urodynamics. There a vast uncharted area between homeostasis retention or expulsion urine.