We investigated the effectiveness of a workplace intervention program that utilized self-monitoring of daily salt excretion by an electronic salt sensor and sent personalized e-mail advice via cellular phone. Forty-one hypertensive male workers were assigned to intervention and control groups, then counseled together. Intervention group members were asked to measure daily salt excretion and received e-mail advice. After 4 weeks, a greater decrease of blood pressure (BP) was observed in the intervention group, with significant reductions to daily salt excretion and home BP. The new intervention program is considered useful for BP control among hypertensive workers.
We assessed the influence of mental stress on cardiovascular parameters, including systolic blood pressure (SBP), heart rate (HR) and sympathetic activity (LF/HF), with the use of a quantitative indicator of energy expenditure (EE). Forty-four male university students underwent a mental arithmetic test. Their EE was 1.3-fold that at rest in response to the test. Change in EE ( EE) in response to the test was compared between subjects with high blood pressure (BP) and those without and between subjects with high salt intake and
Area Network) systems using UWB(Ultra Wide Band) wireless technology that are expected robustness against interference, low power consumption, and little interference to a body for health care.Two types of low and high bands of radio frequency for UWB were examined using various sensors in hospital and home environments.The high band UWB BAN system with TDMA protocol in MAC worked well to prevent interference. The most serious drawbacks was shadowing problem due to a body. We verified most suitable routing to avoid the shadowing problem on the bed.Keywords -wireless body area network (BAN), ultra wide band
It is well known that the sour milk containing lactotripeptides has a blood pressure lowering effect. The aim of this study was to evaluate the blood pressure (BP) lowering effect of lactotripeptides by monitoring home blood pressure, 24-h ambulatory measurements (ABPM), and daily urinary salt excretion. A total of 30 volunteers were given 200 ml of sour milk twice a day for 8 weeks after a 1-week run-in period. This preparation contained the lactotripeptides valine-proline-proline 2.66 mg and isoleucine-proline-proline 1.38 mg. The study participants had daily measurements of urinary salt excretion determined by an electric salt sensor and home blood pressure for each week during the run-in period, before the 4-and 8-week time points. 24-h ABPM was measured at the end of each week. Mean systolic blood pressure (SBP) during night sleep including base BP at 4 and 8 weeks were significantly lower than baseline values. Mean SBP and diastolic blood pressure (DBP) during night sleep of the 22 participants who belonged to the criteria of hypertension by 24-h ABPM was significantly decreased at 4 and 8 weeks. The change in 24-h mean SBP significantly correlated with mean urinary salt excretion over the three measurement periods. The 22 hypertensive subjects without taking lactotripeptides did not show significant change of blood pressure during 24 hours at 4 and 8 weeks. Our study confirmed the BP lowering effect of lactotripeptides during night-time sleep and showed that a lower intake of salt may increase the BP lowering effect of lactotripeptides through 24 hours in hypertensive subjects.
Measuring core body temperature is important in the study of human body temperature regulation in daily life. We measured core body temperature continuously using an ingestible capsule sensor that has excellent ambulatory utility in daily life. Daily temperature changes, including temperature increase during and just after bathing and temperature decrease during sleep, were observed in all subjects. Temperature readings and communication quality were found to be negligibly affected by the intracorporeal position of the capsule as determined by radiography, with no significant temperature difference among positions in the stomach, the small intestine and the large intestine. However, intake of hot or cold beverages during measurement should be avoided for accurate assessment. Loss of data from inside to outside the body was 3.7 ± 2.5% (1.4 ± 3.8% excluding sleeping hours). The increase in data loss during sleep was due to the change in position of the receiver. A loss of 0.66 ± 0.1% was obtained by placing the receiver less than 50 cm from the navel including during sleep, except during the first ten minutes after swallow. The path loss from inside to outside the body was estimated to be less than that of the capsule endoscope.
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