Dooley J W, Mehm W J, Jennings C A, Flowers E P, Casale J G
Department of Scientific Laboratories, Armed Forces Institute of Pathology, Washington, DC 20306-6000.
Undersea Biomed Res. 1990 May;17(3):247-51.
Modifications of an automated, noninvasive vascular diagnostic system (VASCULAB, MedaSonics, Inc.) for measuring blood pressure and plethysmographic blood flow responses to normobaric and hyperbaric oxygenation are described. The system consisted of a pump for inflating and deflating blood pressure cuffs and a microprocessor program controller (VSC21) with ultrasound Doppler, strain-gauge plethysmograph, and chart recorder. Inclusion of the VSC21 controller in the chamber was required for performance of procedures that could not be controlled from outside the chamber. All other components were outside the chamber. For fire prevention the VSC21 controller was nitrogen-purged in an acrylic case mounted on a mobile cart. Pressure-cuff tubes were attached via adapted fittings and connectors in the cart to connector ports in the controller's front panel. Electrical power cables and instrument signal wires were routed through chamber penetrations to an electrical power source and other VASCULAB components, respectively, outside the chamber. Initially, compression of the chamber to pressures in excess of 1.68 bar disabled the VSC21, requiring removal of its front membrane panel and ventilation of its pressure-sensitive keypad switches. This allowed automated assessment of blood pressure and calf blood flow at test pressures of 1.97 and 2.96 bar.
本文描述了一种用于测量血压以及对常压和高压氧合的容积描记血流反应的自动化、非侵入性血管诊断系统（VASCULAB，MedaSonics公司）的改进。该系统包括一个用于给血压袖带充气和放气的泵以及一个带有超声多普勒、应变片容积描记器和图表记录器的微处理器程序控制器（VSC21）。对于无法在舱室外进行控制的操作，需要将VSC21控制器置于舱室内。所有其他组件均在舱室外。为了防火，VSC21控制器在安装于移动推车上的丙烯酸箱内用氮气吹扫。压力袖带管通过推车上适配的配件和连接器连接到控制器前面板的连接端口。电力电缆和仪器信号线分别通过舱室穿孔连接到舱室外的电源和其他VASCULAB组件。最初，将舱室压缩到超过1.68巴的压力会使VSC21失效，需要拆除其前面的膜面板并对其压敏键盘开关进行通风。这样就可以在1.97和2.96巴的测试压力下自动评估血压和小腿血流。
