Analysis of influencing factors of screened myopia in primary school students in seven provinces / 中国学校卫生

Objective@#To understand the current situation and associated factors of myopia among primary school students, and to provide scientific basis for prevention and control of myopia among primary school students.@*Methods@#In Gansu, Guangdong, Guangxi, Guizhou, Liaoning, Shandong, Shanxi and other provinces, 1 prefecture was selected, and a number of primary schools were selected from each region. All the students in the class were selected as the object of this survey. A total of 8 365 middle school students were examined for their eyesight, and the data of general population economic indicators and natural environment indicators were obtained through the statistical yearbook of various provinces and cities. The influencing factors of primary school students myopia were analyzed by chi-square test and multivariate Logistic regression.@*Results@#Univariate analysis showed that different provinces and different sex, different nationalities, different grade, parents average salary, sunshine duration, air temperature, altitude, longitude, latitude, different economic zone(χ2=116.22, 18.08, 26.33, 1 059.04, 14.86, 10.28, 16.95, 10.01, 23.15, 29.43, 88.14, P<0.05). Multivariate analysis results showed that gender, grade, sunshine duration, longitude were risk factor for poor vision(OR=1.31, 1.71, 1.45, 1.54, P<0.05); Economic zone and parents salary were protective factors for poor eyesight of students (OR=0.65, 0.86, P<0.05).@*Conclusion@#Myopia of primary school students is affected by a variety of factors, economic and social factors and natural environmental factors have an impact on the screening.

Associated factors of screened myopia of junior middle school students in six provinces of China / 中国学校卫生

Objective@#To understand the current situation and associated factors of myopia in junior middle school students, and to provide scientific basis for prevention and control of myopia in junior middle school students.@*Methods@#A total of 5 393 junior middle school students were selected from middle schools in Guangdong, Guangxi, Guizhou, Liaoning, Shandong, Shanxi provinces. The visual acuity of middle school students was examined, and the data of general population, economy, sociology and natural environment were obtained through statistical yearbook of each province. The influencing factors of myopia of middle school students were analyzed by univariate and multivariate Logistic regression.@*Results@#The results of single factor analysis showed that the myopia rate of junior high school students was different by gender, grades, parents average wage, sunshine duration, temperature, altitude, longitude and latitude(χ2=47.76，59.05，10.79，106.19，53.56，85.02，76.23，107.07，P<0.05). The results of multi factor analysis showed that gender, grade, average wage, temperature and latitude was positively associated with myopia vision; sunshine duration and longitude were negatively associated with the risk for myopia(OR=1.54，1.34，1.62，7.58，27.10，0.42，0.39，P<0.05).@*Conclusion@#The myopia of junior high school students is affected by a variety of factors, economic and social factors and natural environmental factors have an impact on the screening of sexual myopia in junior high school students. Economic and social factors and natural environmental factors should be taken into account in the formulation of myopia prevention and control measures.

Effects of cognitive impairment in hippocampus on glucose and lipid metabolism and its relations with gastrointestinal motility in rats / 实用医学杂志

Objective To investigate the effects of cognitive impairment in hippocampus on glucose and lipid metabolism, and its relations with gastrointestinal motility. Methods The Aβ1-42 was injected into the hippocampus of rats. Levels of glucose and lipid were detected. The changes of gastrointestinal motility were detected by the type-B ultrasonic and the ink-pushing experiments. Hippocampal neurons apoptosis was detected by the TUNEL assay. Results In the experimental group, FPG, TG, TC, LDL were (7.92 ± 0.29) mmol/L, (2.24 ± 0.12) mmol/L, (4.67 ± 0.12) mmol/L, (2.41 ± 0.12) mmol/L, respectively, with significant differences among these three groups (P < 0.05). Compared with the sham group and the control group, the number of bowel movements per unit time (2.13 ± 0.83) times, gastric emptying rate (44.35 ± 7.53) % and the small intestinal propulsion rate (57.60 ± 7.82)%in the experimental group were significantly decreased (P<0.05). The experimental hippocampal neuronal apoptosis index was an average of (64.98 ± 3.70)%, which was significantly higher than that in the sham group and the control group (P < 0.05). Conclusion Hippocampal cognitive impairment can elevate the blood lipid level, which may be associated with the hippocampal neuronal apoptosis and the gastrointestinal motility disorders.

Anatomy of mesoesophagus in esophagectomy with minimally invasive three-fields lymphadenectomy / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To explore the anatomic features of mesoesophagus in combined thoracoscopic and laparoscopic esophagectomy with three-fields lymphadenectomy.</p><p><b>METHODS</b>Clinical data of 67 patients undergoing thoracoscopic and laparoscopic esophagectomy with three-fields lymphadenectomy from July 2011 to September 2012 were analyzed retrospectively. All the patients underwent three-fields lymphadenectomy. Proper surgical planes were selected according to anatomy of mesoesophagus. Thoracoscopic surgical space was bounded on azygotic vein and divided into upper and low esophageal triangle. Pancreas was the key anatomical mark for laparoscopic gastric dissection, and peripancreatic space was the natural laparoscopic surgical plane. Prevertebral fascia was bottom surface of neck dissection and carotid sheath was the boundary of two sides.</p><p><b>RESULTS</b>The median operative time was 251.6 min (range, 220 to 320 min). The median operative blood loss was 105.6 ml (range, 40 to 320 ml). The median number of lymph nodes dissected was 29.1 (range, 13 to 46, totally 1949). There was no perioperative death. Sixty-six patients were followed up with a mean follow-up time of 8.2 months (range, 2 to 14 months). Postoperative complications included reflux esophagitis in 10 and anastomotic stenosis in 3 cases.</p><p><b>CONCLUSION</b>It is safe and more radical for minimally invasive esophagectomy that overall concept of minimally invasive anatomy of mesoesophagus is applied to identify the anatomic plane and landmark during operation.</p>