抄録
Mechanical characteristics of transportation equipment for patients and its physical effect on the patients' body are discussed. Three dimensional acceleration of stretcher used in the hospital, ambulance and doctor helicopter are measured. Angular velocity of the stretcher is also acquired. In case of stretcher transport, acceleration gives little effect on the patients' body while angular velocity causes uncomfortable. Mathematical model that derives ride discomfort is used to estimate the ideal rotation method during stretcher transport. Next, an actively controlled stretcher (ACS) for ambulance is developed since the emergency brake causes blood pressure variation. The ACS reduces the blood pressure variation and gives good ride comfort during the transportation. Finally, mechanical characteristics of doctor helicopter are analyzed and it is found that helicopter transport gives lesser horizontal acceleration than ambulance one but it is expected to provoke motion sickness because of the huge vertical acceleration below 1[Hz].
