Until the Sui Dynasty in China, night sweat and spontaneous perspiration had been thought to be caused by same pathophysiology, that is, lowered superficial resistance by deficiency of Qi.In the Tang Dynasty, these were considered to have different pathophysiologies and a new principle indicated that pathogenic heat caused night sweat.In the Song and Jing Dynasties, deficiency of blood and pathogenic heat by deficiency of Yin was also considered to cause night sweat.In the Jing Dynasty, exogenous pathogens, such as Cold were considered to cause night sweat, which indicated the principle that not only the deficiency syndrome but also the excess syndrome caused night sweat.In the beginning of the Yuan and Ming Dynasties, it was concluded that the deficiency of Yin caused night sweat and the deficiency of Yang caused spontaneous perspiration.In the middle of the Ming Dynasty, another new theory indicated that deficiency of Yang also possibly caused night sweat; therefore we should diagnose abnormal sweat depending on the pathophysiology in each case.In the Qing Dynasty, new theories were established stating that not only exogenous pathogens but also Damp-heat, undigested food and stagnation of blood, all of which are included in excess syndrome, cause night sweat, and that based on which part of the body sweats occurred we might understand pathophysiology of night sweat. The night sweat by Warm-heat, which is different from the one by Wind-cold, was considered to be caused with deficiency of Yin.Thus we conclude that the theories of night sweat developed over time, based on Chinese medical classics.

Methods: Sixty fresh-frozen lumbar vertebrae from 6-month-old pigs were used. Before screw insertion, the CT values of the screw path were obtained for each sample. Specimens were then randomly divided into three equal groups. Each group had one of three pedicle screws inserted: 4.0-mm LEGACY (4.0-LEG), 4.5-mm LEGACY (4.5-LEG), or 4.5-mm SOLERA (4.5-SOL) (all from Medtronic Sofamor Danek Inc., Memphis, TN, USA). Each screw had a consistent 30-mm thread length. Axial pull-out testing was performed at a rate of 1.0 mm/min. Correlations between the CT values and pedicle screw pull-out strength were evaluated using Pearson’s correlation coefficient analysis. Results: The correlation coefficients between the CT values of the screw path and pedicle screw pull-out strength for the 4.0-LEG, 4.5-LEG, and 4.5-SOL groups were 0.836 (p <0.001), 0.780 (p <0.001), and 0.873 (p <0.001), respectively. Greater CT values were associated with greater screw pull-out strength. Conclusions The CT values of the screw path were strongly positively correlated with pedicle screw pull-out strength, regardless of the screw type and diameter, suggesting that the CT values could be clinically useful for predicting pedicle screw pull-out strength.

Objective：The number of heart failure （HF） patients is increasing in Japan as its population continues to age, but little is known about current medication strategies. We investigated the relationship between medication changes during hospitalization and the readmission rate among older Japanese patients with new-onset HF.Design：Retrospective cohort study.Methods：We analyzed medical record data from Toho University Medical Center Omori Hospital between March 2004 and April 2018. Initial admissions for new-onset HF in patients aged≥75 years were examined (n＝329). The class Ⅰ recommended medications stipulated in the JCS 2017/JHFS 2017 guidelines were used as the target medications for this study. Patients with dose titrations or additions of the target medications during hospitalization (dose titrations or additions group) were compared with patients without these changes (the other group). The primary outcome was readmission due to HF within one year of discharge. A hazard ratio, adjusted for potential confounders, was estimated using a Cox proportional hazards model.Results：There were 231 patients in dose titrations or additions group and 98 patients in the other group.The one-year readmission rate was 26.5％ in dose titrations or additions group and 31.8％ in the other group. The adjusted hazard ratio of medication changes for readmission was 0.82 (95％ confidence interval, 0.51-1.33, P＝0.415), but was not statistically significant.Conclusion：The older HF patients in dose titrations or additions group showed a reduced risk of readmission, but lacked significance due to low statistical power.