Title: An adaptive PI algorithm for regulation of blood pressure of hypertension patients

Authors: K.Y. Zhu, U. Rajendra Acharya, C.M. Lim

Addresses: Department of Electronic and Computer Engineering, Ngee Ann Polytechnic, Singapore 599489, Singapore. ' Department of Electronic and Computer Engineering, Ngee Ann Polytechnic, Singapore 599489, Singapore. ' Department of Electronic and Computer Engineering, Ngee Ann Polytechnic, Singapore 599489, Singapore

Abstract: It is known that postsurgical hypertension is common in cardiac patients and untreated hypertension patients and may result in complications. To prevent this side effect, regulation of the blood pressure for this kind of patient is necessary. The aim of an automatic drug control system is to quickly reduce the oscillatory change in mean blood pressure through infusion of sodium nitroprusside (SNP). In this paper, a new adaptive PI algorithm updating variations in time-delay and sensitivity of the patient is proposed and its effectiveness is analysed in detail. Simulation under clinical conditions is also carried out and the results show that this control system can handle the changes in patient|s dynamics.

Keywords: adaptive control; mean arterial blood pressure; PID controllers; time-varying systems; post-surgical hypertension; cardiac patients; hypertension patients; blood pressure regulation; simulation.

DOI: 10.1504/IJMIC.2011.040486

International Journal of Modelling, Identification and Control, 2011 Vol.13 No.1/2, pp.22 - 29

Published online: 31 May 2011 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article