Heyer E J, Wald A, Mencke A
Department of Anesthesiology, Columbia University, New York, NY 10032-3784, USA.
J Clin Monit. 1995 Sep;11(5):305-10. doi: 10.1007/BF01616988.
As a first step in our study to document postoperative cerebral dysfunction, and to determine whether global cerebral blood flow can be implicated in the etiology of this postoperative change, we have assembled a flexible data acquisition system to acquire and record data from four independent sources, three in digital form and one analog. Each of the monitors that we use has a different requirement: One has eight channels of analog output; the other three have RS-232 digital outputs, each with a data stream with different characteristics. The central element of our data collection is a personal computer running the data acquisition and analysis program, LabVIEW for Windows (National Instruments, Austin, TX). All data are processed through separate LabVIEW global variables; the data strings are concatenated and stored on the hard disk in a spreadsheet format for further analysis. We illustrate an intraoperative recording made during cardiopulmonary bypass (CPB) by showing a graph of the mean arterial pressure (MAP), mixed venous oxyhemoglobin saturation recorded from the jugular bulb (JVO2Sat), and temperature measured from the nasopharynx. A decrease in the MAP after unclamping the aorta is accompanied by a decrease in JVO2Sat.
作为我们记录术后脑功能障碍研究的第一步，并确定全脑血流量是否与这种术后变化的病因有关，我们组装了一个灵活的数据采集系统，以从四个独立来源采集和记录数据，其中三个为数字形式，一个为模拟形式。我们使用的每个监测器都有不同的要求：一个有八个模拟输出通道；另外三个有RS-232数字输出，每个都有具有不同特征的数据流。我们数据收集的核心元件是一台运行数据采集和分析程序（适用于Windows的LabVIEW，美国国家仪器公司，奥斯汀，德克萨斯州）的个人计算机。所有数据都通过单独的LabVIEW全局变量进行处理；数据字符串被连接起来并以电子表格格式存储在硬盘上以供进一步分析。我们通过展示平均动脉压（MAP）、从颈静脉球记录的混合静脉氧合血红蛋白饱和度（JVO2Sat）以及从鼻咽部测量的温度的图表，来说明体外循环（CPB）期间的术中记录。主动脉夹闭解除后MAP的下降伴随着JVO2Sat的下降。
