Development of a Blood Pressure Control System for Wide Use

开发广泛使用的血压控制系统

基本信息

批准号：
10555143
负责人：
ARAKI Mituhiko
金额：
$ 8.32万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

In this research, we have improved our blood pressure control system for hypotensive anesthesia so that it can be used widely. To be concrete, we have made 1) improvement of risk control algorithm, 2) modification of the auto-tuning function for individual difference, and 3) modification of the system structure and interface. The obtained results are as follows.As new risk control functions, we added i) an algorithm for blood transfusion, i. e. transfusion of plasma protein fraction (PPF), concentrated red cell (CRC) and fresh frozen plasma (FFP), and ii) a function for determination of the maximal infusion rate of the hypotensive drug. By adding these functions, the safety of our system is improved.We modified the auto-tuning algorithm of the controller gain, which became inappropriate by the modification of risk control algorithm. By this modification, the controller gain can be changed small enough when the blood pressure is lower than the target blood pressure, and then the performance and the safety of our system are improved.A note-type personal computer is used to make the system smaller. Moreover, the interface for the command input is changed from keyboard to mouse in order to input command easily. Furthermore, a function of judging whether the input value is appropriate or not is added. By these modifications, our system can be easily used in usual operation rooms by medical doctors.Our modifications of the blood pressure control system achieve the purpose in safety and usability.

在这项研究中，我们改善了血压控制系统的低血压麻醉系统，因此可以广泛使用。要具体，我们已经进行了1）改进风险控制算法，2）修改个体差异的自动调节功能，以及3）修改系统结构和界面。获得的结果如下。作为新的风险控制功能，我们添加了i）输血算法，i。 e。血浆蛋白分数（PPF），浓缩红细胞（CRC）和新鲜冷冻血浆（FFP）的输血和II）的功能，是确定低渗药物最大输注率的功能。通过添加这些功能，我们修改了控制器增益的自动调整算法，通过修改风险控制算法，该算法变得不合适。通过这种修改，当血压低于目标血压时，控制器的增益可以足够小，然后改善了系统的性能和安全性。音符类型的个人计算机用于使系统较小。此外，命令输入的接口从键盘更改为鼠标，以便轻松地输入命令。此外，判断输入值是否合适的函数。通过这些修改，医生可以轻松地在通常的操作室中使用我们的系统。我们的血压控制系统的修改实现了安全性和可用性的目的。