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Proceedings Paper

Modeling of patient's blood pressure variation during ambulance transportation
Author(s): Kenji Sakatani; Takahiko Ono; Yasuhide Kobayasi; Shinichi Hikita; Mitsuyuki Saito
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Paper Abstract

In an emergency transportation by ambulance, a patient is transported in a supine position. In this position, a patient's blood pressure (BP) variation depending on an inertial force which occurs when an ambulance accelerates or decelerates. This BP variation causes a critical damage for a patent with brain disorder. In order to keep a patient stable during transportation, it is required to maintain small BP variation. To analyze the BP variation during transportation, a model of the BP variation has so far been made. But, it can estimate the BP variation only in braking. The purpose of this paper is to make a dynamical model of the BP variation which can simulate it in both braking and accelerating. First, to obtain the data to construct the model, we used a tilting bed to measure a head-to-foot acceleration and BP of fingertip. Based on this data, we build a mathematical model whose input is the head-to-foot acceleration and output is the Mean BP variation. It is a switched model which switches two models depending on the jerk. We add baroreceptor reflex to the model as a offset value.

Paper Details

Date Published: 9 January 2008
PDF: 5 pages
Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 67943K (9 January 2008); doi: 10.1117/12.783961
Show Author Affiliations
Kenji Sakatani, Hiroshima City Univ. (Japan)
Takahiko Ono, Hiroshima City Univ. (Japan)
Yasuhide Kobayasi, Hiroshima City Univ. (Japan)
Shinichi Hikita, Hiroshima City Univ. (Japan)
Mitsuyuki Saito, Hiroshima City Univ. (Japan)

Published in SPIE Proceedings Vol. 6794:
ICMIT 2007: Mechatronics, MEMS, and Smart Materials
Minoru Sasaki; Gisang Choi Sang; Zushu Li; Ryojun Ikeura; Hyungki Kim; Fangzheng Xue, Editor(s)

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