The purpose of this study was to discuss the blood pressure response under various kinds of measurement conditions (temperature, time, body part, season) and the measurement conditions in the field of school health by using the cold pressor test (CPT). The subjects were healthy university students. All experiments were carried out during the period from November 2007 to February 2010. The blood pressure of all experiments was measured in left upper arm of subjects per 30 seconds. The right hand or finger of each subject was soaked in cold water.
The main findings were as follows:1) The vasopressor responses in the stimulation temperature of 12℃ (6.4±4.2mmHg) and 16℃ (4.0±6.9mmHg) were smaller than the responses in the stimulation temperature of 4℃ (11.9±7.7mmHg) and 8℃ (9.7±6.6mmHg). 2) The vasopressor response in the stimulation time for 1 minute (12.3±8.0mmHg) was bigger than the response in the stimulation time for 30 seconds (6.6±6.3mmHg). 3) The vasopressor responses in the stimulation body part of the fingers (6.0±3.7mmHg) and hands (6.1±7.5mmHg) showed little difference. 4) The vasopressor responses across the spring (14.0±7.3mmHg), summer (14.4±8.1mmHg), autumn (11.1±9.2mmHg) and winter (9.4±5.2mmHg) were not significantly different. However, between the average response in the summer (which showed the largest response of all the seasons) and the average response in winter (which showed the smallest response of all the seasons), there was a difference of 5.0mmHg. 5) From the above, when CPT was conducted to compare with previous study, the measurement conditions should be set in stimulation temperature of 4℃ and stimulation time for 1 minute. When it was not, measurement conditions could be also set to each study designs.
