Modeling of patient's blood pressure variation during ambulance transportation

Kenji Sakatani; Takahiko Ono; Yasuhide Kobayasi; Shinichi Hikita; Mitsuyuki Saito

doi:10.1117/12.783961

9 January 2008 Modeling of patient's blood pressure variation during ambulance transportation

Kenji Sakatani, Takahiko Ono, Yasuhide Kobayasi, Shinichi Hikita, Mitsuyuki Saito

Proceedings Volume 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials; 67943K (2008) https://doi.org/10.1117/12.783961
Event: ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 2007, Gifu, Japan

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.

Citation Download Citation

Kenji Sakatani, Takahiko Ono, Yasuhide Kobayasi, Shinichi Hikita, and Mitsuyuki Saito "Modeling of patient's blood pressure variation during ambulance transportation", Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 67943K (9 January 2008); https://doi.org/10.1117/12.783961

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