ABSTRACT
Objective To study different ambient temperatures effected on hemorheological characteristics of rats. Methods 70 rats were divided into 7 groups evenly and raised at the ambient temperature of 7, 12, 16, 22, 28, 32 and 35 ℃, respectively, for 7 days. 5 mL blood was collected by heart puncture technique from each rat to test their hemorheological parameters within 2 hours. Results When the ambient temperature was at 7, 12, 32 or 35 ℃, the hemorheological parameters were abnormal, the variability of erythrocytes was reduced, the resistance of capillaries was increased and the erythrocytes was assembled easily, thus preventing the normal blood circulation, slowing the local blood stream, causing the hypoxia and affecting the organic metabolism and function. Conclusions The hemorheological parameters were optimal within the ambient temperature range of 16~28 ℃, with the resistance of blood flow being smaller and the rheological properties of red blood cells being better. As for keeping the good microcirculation of the organism, it seems that the lowest and highest ambient temperature should be around 7 ℃ and 32 ℃, respectively.
ABSTRACT
Objective To describe the status of fatigue and its influencing factors among hypertension patients. Methods A total of 1253 hypertension patients were investigated with global fatigue severity subscale,family APGAR index and self-designed questionnaire. Results 36.7% of hypertension patients were fatigue.Univariate analysis showed that the determinants of fatigue among hypertension patients included older, normal marriage, rural, low educational, mental, family dysfunction (P ＜ 0.05 ). Multivariate analysis revealed that age ( OR =2. 612,95% CI = 2. 047 ～ 3. 333 ), normal marriage ( OR = 1. 754,95% CI = 1. 259 ～ 2. 445 ), manual ( OR =0.810,95 % CI = 0.698 ～ 0.939) and family dysfunction ( OR = 1.717,95 % CI = 1. 396 ～ 2.111 ) were associated with fatigue. Conclusion The rate of status is high in the hypertension patients. The behavior is related to age,marital status, labor type and family function.