Automatic patient weighing system

摘要

A patient weighing system for automatically providing a visual display of instantaneous patient weight includes a bed assembly for receiving the patient which is supported by weight responsive means producing analog signals as a function of instantaneous total weight. The analog signals are converted to commensurate digital signals. A first storage register stores the digital signal representative of the weight of the bed assembly without the patient. A second storage register stores the digital signals representative of the total weight of the bed assembly including the patient. A difference digital signal is developed which is representative of the difference between the digital signals stored in the first and second storage registers, providing a net or remainder digital signal which is a function of patient weight. A suitable means responsive to the difference digital signal is provided for visually displaying the patient weight, preferably on a repetitive cyclic basis so that the patient weight visual data is constantly updated. In a preferred embodiment, a manually adjustable input is provided to compensate for additions to the bed weight not attributable to change in patient weight such as pillows, blankets, medical equipment, etc. Additionally, by storing the difference digital signal and comparing it with the next sequentially developed difference digital signal, a suitable change of patient weight visual display can be provided.