目的探讨冲刺间歇训练时两种恢复方式(积极性恢复vs.消极性恢复)对士兵运动能力和训练效果的影响。方法选取18名男性武警士兵完成6组冲刺间歇训练(30 s Wingate全力蹬车试验),间歇期(4 min)分别进行消极性恢复(即在功率自行车上休息)和...目的探讨冲刺间歇训练时两种恢复方式(积极性恢复vs.消极性恢复)对士兵运动能力和训练效果的影响。方法选取18名男性武警士兵完成6组冲刺间歇训练(30 s Wingate全力蹬车试验),间歇期(4 min)分别进行消极性恢复(即在功率自行车上休息)和积极性恢复(以1.1 W/kg负荷继续蹬车),每次Wingate试验时(不包括间歇期)记录峰值功率(PP)、平均功率(MP)、疲劳指数(FI)、总做功(TW)和心率(HR)等参数。结果与消极性恢复比较,积极性恢复PP在第2次Wingate试验时降低(P<0.05),MP和HR在第4~6次Wingate试验时升高,差异均有统计学意义(P<0.05),FI和TW差异无统计学意义(P>0.05)。结论积极性恢复可提高冲刺间歇训练后期的训练效果,士兵应根据训练方案选择合理的恢复方式。展开更多
The safety and effectiveness of a novel Chinese one-shot dilation technique based on stimulated diuresis for percutaneous nephrolithotomy（PCNL） were investigated.After the feasibility of the Chinese one-shot dilatio...The safety and effectiveness of a novel Chinese one-shot dilation technique based on stimulated diuresis for percutaneous nephrolithotomy（PCNL） were investigated.After the feasibility of the Chinese one-shot dilation based on stimulated diuresis was verified by an animal study,this technique was applied in the clinical practice.A total of 67 patients in our department underwent the modified PCNL from July 2014 to June 2015.After the renal infundibulum was distended by stimulated diuresis,the kidney was punctured under the ultrasonographic guidance via the fornix of the target calyx.The working channel was dilated using a special designed pencil-shaped fascial dilator.The successful access rate,nephrostomy tract creation time,pre-and postoperative hemoglobin values and serum creatinine concentrations,stone-free rate and complications were recorded and analyzed.The renal infundibulum was successfully distended in all of the patients by the diuresis treatment.Under the ultrasonographic guidance,the successful access rate was 100% and the mean tract creation time was 2.0 min（range：1.5–5.0 min）.The stone-free rate right after surgery was 91.0%.Although the postoperative hemoglobin was significantly reduced（P〈0.01）,transfusion was not clinically necessary.There was no significant difference in serum creatinine concentrations before and after operation（P〉0.05）.No severe complication occurred during or after the PCNL.It was suggested that this Chinese one-shot dilation technique based on stimulated diuresis is an efficient and safe innovation for PCNL,and is even helpful for those patients with non-dilated pelvicaliceal systems.展开更多
Background The impact of pediatric body mass index(BMI)trajectories on the risk of adolescent hypertension(HTN)determined by three separate visits remains unclear.This longitudinal study aims to identify potential ped...Background The impact of pediatric body mass index(BMI)trajectories on the risk of adolescent hypertension(HTN)determined by three separate visits remains unclear.This longitudinal study aims to identify potential pediatric sex-specific BMI trajectories and to assess their associations with HTN and HTN subtypes.Methods Based on the Health Promotion Program for Children and Adolescents(HPPCA)in Suzhou,China,a total of 24,426 participants who had initial normal blood pressure(BP)and had at least four BMI measurements during 2012-2020 were included.HTN was defined as simultaneously having three separate visits of elevated BP in 2020.Latent class growth models were used to explore sex-specific BMI trajectories,whose associations with HTN and HTN subtypes were further examined by logistic regression.Results The incidence of HTN determined through three separate visits was 3.34%.Four trajectories were identified for both sexes:low BMI increasing,medium BMI increasing,high BMI increasing,and highest BMI increasing.Compared to the medium BMI increasing group,the odds ratio(95%confidential interval)for developing adolescent HTN of the low,high,and highest BMI increasing groups among boys were 0.54(0.39,0.75),1.90(1.44,2.51),and 2.89(1.90,4.39),respectively;and the corresponding values for girls were 0.66(0.48,0.90),2.30(1.72,3.09),and 4.71(3.06,7.26).Similar gradually elevated associations between different trajectories with isolated systolic hypertension,systolic and diastolic hypertension were observed.Conclusion Current results emphasized the adverse effects of stable high BMI on HTN and the benefits of maintaining normal weight throughout childhood.展开更多
Aim To evaluate the effect of single or dual field irra- diation （IR） with the same dose on damage to miniature pig parotid glands. Methodology Sixteen miniature pigs were divided into two IR groups （n=6） and a co...Aim To evaluate the effect of single or dual field irra- diation （IR） with the same dose on damage to miniature pig parotid glands. Methodology Sixteen miniature pigs were divided into two IR groups （n=6） and a control group （n=4）. The irradi- ation groups were subjected to 20 Gy X-radiation to one parotid gland using single-field or dual-field modality by linear accelerator. The dose-volume distributions between two IR groups were compared. Saliva from parotid glands and blood were collected at 0, 4, 8 and 16 weeks after irradiation. Parotid glands were removed at 16 weeks to evaluate tissue morphology.Results The irradiation dose volume distributions were significantly different between single and dual field irradi- ation groups （t----4.177, P=0.002）, although dose volume histogramin （DVH） indicated the equal maximal dose in parotid glands. Saliva flow rates from IR side decreased dramatically at all time points in IR groups, especially in dual field irradiation group. The radiation caused changes of white blood cell count in blood, lactate dehydrogenase and amylase in serum, calcium, potassium and amylase in saliva. Morphologically, more severe radiation damage was found in irradiated parotid glands from dual field irradi- ation group than that from single field irradiation group. Conclusion Data from this large animal model demons- trated that the radiation damage from the dual field irradiation was more severe than that of the single field irradiation at the same dose, suggesting that dose-volume distribution is an important factor in evaluation of the radiobiology of parotid glands.展开更多
文摘目的探讨冲刺间歇训练时两种恢复方式(积极性恢复vs.消极性恢复)对士兵运动能力和训练效果的影响。方法选取18名男性武警士兵完成6组冲刺间歇训练(30 s Wingate全力蹬车试验),间歇期(4 min)分别进行消极性恢复(即在功率自行车上休息)和积极性恢复(以1.1 W/kg负荷继续蹬车),每次Wingate试验时(不包括间歇期)记录峰值功率(PP)、平均功率(MP)、疲劳指数(FI)、总做功(TW)和心率(HR)等参数。结果与消极性恢复比较,积极性恢复PP在第2次Wingate试验时降低(P<0.05),MP和HR在第4~6次Wingate试验时升高,差异均有统计学意义(P<0.05),FI和TW差异无统计学意义(P>0.05)。结论积极性恢复可提高冲刺间歇训练后期的训练效果,士兵应根据训练方案选择合理的恢复方式。
文摘The safety and effectiveness of a novel Chinese one-shot dilation technique based on stimulated diuresis for percutaneous nephrolithotomy（PCNL） were investigated.After the feasibility of the Chinese one-shot dilation based on stimulated diuresis was verified by an animal study,this technique was applied in the clinical practice.A total of 67 patients in our department underwent the modified PCNL from July 2014 to June 2015.After the renal infundibulum was distended by stimulated diuresis,the kidney was punctured under the ultrasonographic guidance via the fornix of the target calyx.The working channel was dilated using a special designed pencil-shaped fascial dilator.The successful access rate,nephrostomy tract creation time,pre-and postoperative hemoglobin values and serum creatinine concentrations,stone-free rate and complications were recorded and analyzed.The renal infundibulum was successfully distended in all of the patients by the diuresis treatment.Under the ultrasonographic guidance,the successful access rate was 100% and the mean tract creation time was 2.0 min（range：1.5–5.0 min）.The stone-free rate right after surgery was 91.0%.Although the postoperative hemoglobin was significantly reduced（P〈0.01）,transfusion was not clinically necessary.There was no significant difference in serum creatinine concentrations before and after operation（P〉0.05）.No severe complication occurred during or after the PCNL.It was suggested that this Chinese one-shot dilation technique based on stimulated diuresis is an efficient and safe innovation for PCNL,and is even helpful for those patients with non-dilated pelvicaliceal systems.
文摘Background The impact of pediatric body mass index(BMI)trajectories on the risk of adolescent hypertension(HTN)determined by three separate visits remains unclear.This longitudinal study aims to identify potential pediatric sex-specific BMI trajectories and to assess their associations with HTN and HTN subtypes.Methods Based on the Health Promotion Program for Children and Adolescents(HPPCA)in Suzhou,China,a total of 24,426 participants who had initial normal blood pressure(BP)and had at least four BMI measurements during 2012-2020 were included.HTN was defined as simultaneously having three separate visits of elevated BP in 2020.Latent class growth models were used to explore sex-specific BMI trajectories,whose associations with HTN and HTN subtypes were further examined by logistic regression.Results The incidence of HTN determined through three separate visits was 3.34%.Four trajectories were identified for both sexes:low BMI increasing,medium BMI increasing,high BMI increasing,and highest BMI increasing.Compared to the medium BMI increasing group,the odds ratio(95%confidential interval)for developing adolescent HTN of the low,high,and highest BMI increasing groups among boys were 0.54(0.39,0.75),1.90(1.44,2.51),and 2.89(1.90,4.39),respectively;and the corresponding values for girls were 0.66(0.48,0.90),2.30(1.72,3.09),and 4.71(3.06,7.26).Similar gradually elevated associations between different trajectories with isolated systolic hypertension,systolic and diastolic hypertension were observed.Conclusion Current results emphasized the adverse effects of stable high BMI on HTN and the benefits of maintaining normal weight throughout childhood.
基金supported by the National Natural Science Foundation of China(Grant 30430690)Beijing Major Scientific Program Grants(D09 06007000091
文摘Aim To evaluate the effect of single or dual field irra- diation （IR） with the same dose on damage to miniature pig parotid glands. Methodology Sixteen miniature pigs were divided into two IR groups （n=6） and a control group （n=4）. The irradi- ation groups were subjected to 20 Gy X-radiation to one parotid gland using single-field or dual-field modality by linear accelerator. The dose-volume distributions between two IR groups were compared. Saliva from parotid glands and blood were collected at 0, 4, 8 and 16 weeks after irradiation. Parotid glands were removed at 16 weeks to evaluate tissue morphology.Results The irradiation dose volume distributions were significantly different between single and dual field irradi- ation groups （t----4.177, P=0.002）, although dose volume histogramin （DVH） indicated the equal maximal dose in parotid glands. Saliva flow rates from IR side decreased dramatically at all time points in IR groups, especially in dual field irradiation group. The radiation caused changes of white blood cell count in blood, lactate dehydrogenase and amylase in serum, calcium, potassium and amylase in saliva. Morphologically, more severe radiation damage was found in irradiated parotid glands from dual field irradi- ation group than that from single field irradiation group. Conclusion Data from this large animal model demons- trated that the radiation damage from the dual field irradiation was more severe than that of the single field irradiation at the same dose, suggesting that dose-volume distribution is an important factor in evaluation of the radiobiology of parotid glands.
