Marcus R R, Horvath S M
Am J Physiol. 1983 Mar;244(3):H413-6. doi: 10.1152/ajpheart.1983.244.3.H413.
An automated limb blood flow plethysmograph has been developed and interfaced to a PDP-11/60 computer. This system automatically inflates blood pressure cuffs, calibrates strain gauges, provides real-time display of limb circumference changes, and provides digital output of limb blood flow and real-time graphic display of cuff pressure. The system has been designed to require a minimum amount of user interaction by providing automatic calibration in situ, which is initiated by depressing a switch, and automatic venous cuff inflation, which initiates computer analysis of blood flow data. Digital and graphic display of blood flow is provided on a computer terminal 12 s after the start of venous occlusion. All raw data are stored on a disk for optional postexperiment analysis, which enables each blood flow curve to be graphically displayed and reanalyzed under user control. Calculated data are stored on a disk for output to a line printer at the conclusion of an experiment. A trend plot of all analyzed blood flows can be displayed on a computer terminal anytime during an experiment.
一种自动肢体血流体积描记仪已被开发出来，并与一台PDP-11/60计算机相连接。该系统能自动给血压袖带充气、校准应变仪、实时显示肢体周长变化，并提供肢体血流的数字输出以及袖带压力的实时图形显示。该系统设计为通过原位自动校准（按下一个开关即可启动）和自动静脉袖带充气（启动血流数据的计算机分析）来减少用户交互。在静脉阻塞开始12秒后，血流的数字和图形显示会出现在计算机终端上。所有原始数据都存储在磁盘上，供实验后进行可选分析，这使得每条血流曲线都能在用户控制下以图形方式显示并重新分析。计算得到的数据存储在磁盘上，以便在实验结束时输出到行式打印机。在实验过程中的任何时候，所有分析过的血流趋势图都可以显示在计算机终端上。
