OBJECTIVE: To investigate the behavioral and ultrastructural changes of intrathecal administration of different concentrations of ropivacaine for 12 h. METHODS: Thirty male SD rats were randomly divided into 5 groups (6 rats in each group):group N (control), group A (ropivacaine 0.25%), group B (ropivacaine 0.5%), group C (ropivacaine 0.75%),and group D (ropivacaine 1.0%). A polyurethane microcatheter was inserted into the lumbar subarachnoid space 8 cm according to Yakshos intrathecal administration. The rats in group N received saline 0.12 mL/kg for 8 times at 1.5 h interval through the catheter, and the rats in the other groups received different concentrations of ropivacaine in the same way as in group N. The poster paw withdrawal latency to heat (PWHL) and mechanical stimulation (von Fray filament) (PWML) were measured the day before the intrathecal administration and 12 hours after the first intrathecal administration of ropivacaine. Motor function (MF) was measured after the last intrathecal administration. After the behavior test, the rats were sacrificed and the lumber segments of the spinal cord were immediately removed for electron microscopic examination. RESULTS: A total hind limb paralysis was seen at 30 seconds and intramuscular strain gradually came back 10~60 minutes after the intrathecal administration of ropivacaine in group A, B, C, and D, but not in group N. The recovery time of motor block of group A was the shortest (P<0.05), that of group D was the longest,and that of group B and C was between group A and D. Intrathecal administration of different concentrations of ropivacaine did not affect the percent maximum possible effect (%MPE) of PWHL and PWML. Electron microscopic examination showed that the spinal cords were normal in group N and A, slight edema of mitochondria and endoplasmic reticulum (ER) in group B, loosened fibrous layers in medullary sheath, edema and local degeneration of neuraxis in group C,and shrinkage of nuclear membrane, serious edema of ER, vacuolus change of mitochondria and local demyelination in group D. CONCLUSION Ropivacaine (0.5%, 0.75%, and 1.0%) administered intrathecally for 12 hours causes different degrees of ultrastructural changes in the spinal cord depending on concentrations.
Amides ; administration & dosage ; toxicity ; Anesthetics, Local ; administration & dosage ; toxicity ; Animals ; Behavior, Animal ; drug effects ; Dose-Response Relationship, Drug ; Injections, Spinal ; Male ; Microscopy, Electron ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Ropivacaine ; Spinal Cord ; ultrastructure

Hospital fire safety management is not only a key aspect of hospital safety management,but also bears the im-portant mission of ensuring the safety of the lives and property of patients within the hospital.With the continuous development of intelligent technology,the fire safety industry is gradually moving towards intelligence,digitization,and networking.This article will combine the practical situation of smart fire protection at Guangdong Second People's Hospital,actively explore new models of smart fire protection construction and application under the new situation,in order to provide reference for major hospitals to build strong fire safety barriers.

Objective To investigate the effect of Huatan Qushi Huoxue prescription on the ultrastructure of hepatocyte mitochondria in a rat model of nonalcoholic steatohepatitis (NASH). Methods A total of 48 male Sprague-Dawley rats were randomly divided into blank group, model group, Yishanfu group, and Huatan Qushi Huoxue prescription group, with 12 rats in each group. The rats in the model group and the drug groups were administered and modeled since week 2; the rats in the blank group were given normal diet, and those in the other three groups were given high-fat diet. Based on dose conversion between human and animal, the equivalent dose of Huatan Qushi Huoxue prescription was 1.26 g/100 g body weight, and the equivalent dose of polyene phosphatidylcholine capsules (Yishanfu) was 0.014 18 g/100 g body weight. The rats in the model group were given 0.9% sodium chloride by gavage, those in the Yishanfu group were given polyene phosphatidylcholine suspension by gavage, and those in the traditional Chinese medicine group were given the granules of Huatan Qushi Huoxue prescription by gavage, once a day for 10 consecutive weeks. A transmission electron microscope was used to observe liver ultrastructure and perform a quantitative analysis. A one-way analysis of variance was used for comparison of continuous data between multiple groups; for further pairwise comparison, the least significant difference t -test was used for data with homogeneity of variance, and the Dunnett's T3 was used for data with heterogeneity of variance. Results The model group had a large number of lipid droplets accumulated in hepatocytes, changes in mitochondrial morphology and structure, and reductions in the number of mitochondria and endoplasmic reticulum. The Huatan Qushi Huoxue prescription group had a significant reduction in lipid droplets in hepatocytes and significant increases in the number of mitochondria and endoplasmic reticulum compared with the model group, with intact mitochondrial membrane and structure. The Yishanfu group had a reduction in lipid droplets in hepatocytes, an increase in the number of mitochondria, and a reduction in the number of endoplasmic reticulum, with relatively intact mitochondrial membrane and structure. The quantitative analysis showed that compared with the blank group, the model group had a significant increase in the area of lipid droplets and a significant reduction in mitochondria, with a significant difference in mitochondrial density between the two groups (all P < 0.01); after drug intervention, the Yishanfu group had a significant reduction in the area of lipid droplets and a significant increase in the number of mitochondria, with a significant difference in mitochondrial density between the Yishanfu group and the model group (all P < 0.01); compared with the Yishanfu group, the traditional Chinese medicine group had a significantly greater reduction in the area of lipid droplets and a significant increase in the number of mitochondria, with a significant difference in mitochondrial density between the two groups (all P < 0.05). Conclusion Huatan Qushi Huoxue prescription can improve lipid accumulation, increase mitochondrial density, and protect mitochondrial structure and function, with a better clinical effect than Yishanfu.

BACKGROUND: Limited published research has examined the relationships of negative life events and coping styles with sleep quality in Chinese junior high school students. We aimed to investigate the prevalence of poor sleep quality and to clarify the role of coping styles between negative life events and sleep quality. METHODS: A cross-sectional study of 3081 students was conducted in Ganzhou City, Jiangxi Province, Southeastern China. Adolescent Self-Rating Life Events Checklist, Simplified Coping Style Questionnaire, and Pittsburg Sleep Quality Index were applied to assess negative life events, coping styles, and sleep quality, respectively. Descriptive analyses, independent-samples t tests, one-way analyses of variance, Pearson correlation analyses, and structural equation modeling (SEM) were applied to analyze the data. RESULTS: The prevalence of poor sleep quality was 26.7%. Negative life events (B = 0.038, P < 0.001) and negative coping style (B = 0.049, P < 0.001) demonstrated a positive association with poor sleep quality, while positive coping style indicated a negative association with poor sleep quality (B = -0.029, P < 0.001). Interactions of negative life events and coping styles with sleep quality were not found (all P > 0.05). The association between negative life events and sleep quality was mediated by negative coping styles. CONCLUSIONS Our results indicated that poor sleep quality was common in these Chinese adolescents. Negative life events and negative coping style were associated with an increased prevalence of poor sleep quality, while the positive coping style was related to a decreased prevalence of poor sleep quality. A negative coping style mediated the association between negative life events and sleep quality.
Adaptation, Psychological ; Adolescent ; Child ; China ; Cross-Sectional Studies ; Humans ; Life Change Events ; Psychology, Adolescent ; Psychology, Child ; Sleep

BACKGROUND: Most Chinese migrants have been faced with obstacles to getting access to local public health services. Young migrants among internal migrants make a major contribution to the economy. However, the establishment of their health records has been ignored. This research was aimed at exploring the status and associated factors of the establishment of health records among young Chinese migrants. METHODS: Data were obtained from the 2017 China Migrants Dynamic Survey (CMDS). Chi-square test and binary logistic regression were performed to investigate the associated factors of the establishment of health records among young Chinese migrants. RESULTS: Approximately 30.2% of young migrants had their health records established in inflow communities. Urban residence, medical insurance (insured), and lower average monthly household income were attributed to the establishment of more health records. Young migrants who were in northeast China and across provinces and immigrated for working or engaging in trade were less likely to have health records established. Young migrants who participated in social activities and public affairs activities and took type of people in touch as natives in the inflow area showed a higher possibility of establishing health records. Meanwhile, receiving health education and hearing about national basic public health services (BPHSs) were beneficial for establishing the health records of more young migrants. CONCLUSION This study showed that the health records of young migrants had a relatively low establishment rate. Sociodemographic and migration characteristics, health status, public health services, and social integration factors were all related to the health record establishment of young Chinese migrants.
Adolescent ; Adult ; China ; Female ; Health Records, Personal ; Humans ; Male ; Transients and Migrants/statistics & numerical data* ; Young Adult