The distribution and changes of thyroid peroxidase (TPO) in 30 cases of Hashimoto's thyroiditis were studied with immunohistochemical method, TPO-positive product was demonstrated in small follicules and trabecular colls, The positive rate and relative amount of TPO in Hashimoto's thyroiditis were significantly decreased than those of hyperthyroidal and normal tissues. The remarkable reduction of TPO which mainly resulted from the destruction of follicular cells was associated with the obstruction of iodination.

Objective To compare the therapeutic effect of azithromycin and erythromycin in the treatment of children with Mycoplasma pneumoniae infection complicated with central nervous system involvement.Methods Mycoplasma pneumoniae infection in children with central nervous system damage treated in our hospital from March 2014 to June 2015 were selected as the observation object.According to the treatment method,it was divided into treatment group(45 cases)and control group(50 cases),the control group was given erythromycin tablets,the treatment group given azithromycin.To observe the therapeutic effect of two groups,compared the cerebrospinal fluid inflammatory cytokine levels and lung function of the two groups before and after treatment.Results The effective rate of treatment group was significantly higher than that of control group,and the difference was statistically significant(P<0.05); After treatment,the indexes of lung function in patients of the two groups were increased before treatment,and the treatment group increased more significantly(P<0.05); The level of hs-CRP,IL-6 and other inflammatory cytokine of the two groups of patients before treatment had no significantly difference,after treatment,the two groups of patients with the above indicators were lower than before treatment,and the treatment group decreased more significantly(P<0.05).Conclusion Azithromycin and erythromycin in children with Mycoplasma pneumoniae infection complicated with central nervous system involvement have better treatment effect,and the effect of azithromycin is better,has a high clinical value.

Objective: To investigate the level of maternal and infant health literacy and its influencing factors among rural pregnant and lying-in women in Guian New Area, Guiyang City, so as to provide insights into maternal and infant health education. Methods: All pregnant and lying-in women included in health management in township hospitals of Guian New Area from October to December 2021 were selected using a stratified cluster random sampling method. Participants' basic features, maternal and infant health literacy and health education needs were collected using electronic questionnaires, and factors affecting maternal and infant health literacy were identified among pregnant and lying-in women using unconditioned multivariable logistic regression model. Results: A total of 918 valid questionnaires were recovered, and the participants included 325 pregnant women (35.40%), 823 married women (89.65%), 466 women with an educational level of junior high school and below (50.76%), 847 rural household registration (92.27%), 695 women with monthly family income of 3 200 Yuan and less (75.71%), and 267 women with maternal and infant health literacy (29.08%). Multivariable logistic regression analysis identified pluripara (OR=3.418, 95%CI: 1.689-6.919), educational level (diploma, OR=2.901, 95%CI: 1.230-6.842; bachelor and above, OR=6.282, 95%CI: 2.548-15.489), household monthly income per capita (3 201-5 000 Yuan, OR=2.373, 95%CI: 1.499-3.757; 5 001 Yuan and more, OR=7.752, 95%CI: 3.072-19.558), a disease history (OR=3.045, 95%CI: 1.175-5.406), use of maternal and child health manuals (OR=1.881, 95%CI: 1.345-2.632) and emphasizing health education (OR=1.735, 95%CI: 1.122-2.463) as factors promoting for the level of maternal and infant health literacy. In addition, pregnant and lying-in women's major maternal and infant health education needs included infant growth and development knowledge (745 women, 81.15%), management of common infant diseases (719 women, 78.32%), daily infant nursing (651 women, 70.92%) and infant nutrition and feeding (646 women, 70.37%). Conclusions The level of maternal and infant health literacy is low among rural pregnant and lying-in women in Guian New Area, and there is a high demand for health education. High attention should be paid to rural pregnant and lying-in women with a low educational level, low incomes, and primipara.

Facing the current situation of scientific literacy in vocational medical school, med-ical science literacy education has been penetrated into the teaching process of human functionology by measures of combining with research materials and clinical cases, increasing the proportion of ex-perimental teaching, stressing comprehensive practical projects and carrying out the ‘competitive learning’ to improve competency and occupation competitiveness of vocational medical students.

Objective:To investigate the effect of transurethral plasma enucleation of prostate with bladder neck and prostatic apex urethral mucosa preservation on the incidence of retrograde ejaculation after surgery.Methods:The clinical data of 77 patients with benign prostatic hyperplasia (BPH) admitted to Jinhua people's Hospital from January 2018 to June 2020 were retrospectively analyzed. The ages of the two groups [(62.06±2.01)years old and (62.36 ± 2.12)years old] were comparable. There were no significant differences between the groups( P>0.05) in term of the prostate volume (72.91±17.57) ml vs. (68.07±17.28)ml, Q max [(7.33±2.02)ml/s vs. (7.79±2.09)ml/s)], and IPSS (25.51±5.66) vs.(25.17±4.90). The conventional operation group was treated with " trefoil" enucleation of prostate. The modified operation group underwent the following three improved techniques. Firstly, the anterior mucosa of the verumontanum was cut 1.5 cm away from the medial surface of the verumontanum to prevent the external sphincter injury. Secondly, part of the prostate tissue was retained by exceeding the verumontanum when cutting off the bilateral lobes. Thirdly, the middle lobe of the prostate was bluntly stripped to the bladder neck with the sheath of the electroscope in order to protect the transverse muscle fibers as well as the integrity of the bladder neck. The outcome and the ejaculation function of the two groups were analyzed. Results:There was no significant difference in operation time [(66.74±9.29)min vs. (71.29±15.32) min], catheter indwelling duration [(5.31±0.76)d vs.(5.00±1.06)d], and hospital stay [(7.57±0.88) d vs. (7.17±1.45)d] between the two groups ( P>0.05) after more than 6 months of follow-up. According to IIEF score, mild erectile dysfunction occurred in both groups, with the incidence rate of 20.7%(6/29) and 13.5%(5/37) respectively, and there was no significant difference between the two groups ( P>0.05). The postoperative maximum urinary flow rate (Q max) [(23.51±4.25) ml/s vs.(24.05±3.81)ml/s] and IPSS score (6.46±2.72 vs. 6.55±2.99) was significantly different from that before the operation ( P<0.05). However, there was no significant difference between the two groups ( P>0.05). The incidence of retrograde ejaculation in conventional operation group and modified operation group was 23/35(65.7%) and 13/42(31.0%), and the difference was statistically significant ( P<0.05). Immediate urinary continence were 24/35(68.6%) and 36/42(85.7%) in the conventional operation group and the modified operation group respectively, and there was no significant difference between the two groups( P>0.05). After 6 months of follow-up, urinary continence in both groups was 100.0%. Conclusions:Transurethral plasmakinetic enucleation of the prostate with the preservation of bladder neck and urethral mucosa of prostate apex is the same effective as conventional operation in the treatment of benign prostatic hyperplasia, but the incidence of retrograde ejaculation after operation is significantly reduced, which is suitable for those patients who desire to retain their ejaculation function.

Objective To determine the contents of free ferulic acid and total ferulic acid in different processed products of Rhizoma Chuanxiong.Methods With methanol-formic acid(95∶5) as the extraction solvent for free ferulic acid and with methanol-2% NaHCO3 water solution(95∶5) as the extraction solvent for total ferulic acid,ultrasonic method was used for the extraction.The contents of free ferulic acid and total ferulic acid were determined by HPLC,and the chromatographic conditions were as follows: C18 column(250mm?4.6mm,5?m),the mobile phase consisting of acetonitrile-1%acetic acid solution(20∶80),the detecting wavelength at 320nm,flow rate being 1.0 mL/min and detection at room temperature.Results The average contents of free ferulic acid and total ferulic acid in Rhizoma Chuanxiong roasted by wine were higher than those in raw and other processed Rhizoma Chuanxiong,and free ferulic acid content in raw and different processed Rhizoma Chuanxiong was lower than the total ferulic acid content.Conclusion The method is simple,accurate and can be used for the quality control standard for Rhizoma Chuanxiong,and the chemical assay of total ferulic acid content would be a better choice of assessing the herbal quality of Rhizoma Chuanxiong.

Objective Cerebral ischemic tolerance induced by cerebral ischemic preconditioning has become a hotspot in the researches of ischemic cerebrovascular disease, and its specific mechanism remains to be clarified.This study was to explore the brain protection mechanisms of cerebral ischemic preconditioning by observing the expressions of HIF-1αand VEGF in the cortex area sur-rounding the infarct locus in rats with focal cerebral ischemia /reperfusion ( I/R) after cerebral ischemic preconditioning. Methods A total of 130 male SD rats were randomly divided into three groups:sham operation, middle cerebral artery occlusion, and cerebral is-chemic preconditioning, the animals in the latter two groups subjected to 2, 6, 12, 24, 48 and 72 h of I/R.The expressions of HIF-1α and VEGF at different time points were detected by immunohistochemistry and Western blot. Results In the middle cerebral artery occlusion group, the expressions of HIF-1αand VEGF positive cells and proteins increased at 2 h after I/R, reached the peak at 24 h, and then gradually decreased to and at 72 h, but still higher than in the sham operation group (P<0.05).The expressions of HIF-1αand VEGF positive cells were significantly higher in the cerebral ischemic preconditioning than in the middle cerebral artery occlusion group (all P<0.05), so were the expressions of HIF-1αand VEGF positive proteins in the former group than in the latter (all P<0.05).The sham operation group showed only a little in-crease in the expressions of HIF-1αand VEGF positive cells and proteins. Conclusion Cerebral ischemia reperfusion injury induces the expressions of HIF-1αand VEGF, which can be further upregulated by brain ischemic preconditioning.

Objective To evaluate the MR imaging and CT appearances of focal nodular hyperplasia (FNH) of the liver and improve the accuracy of diagnosis in FNH. Methods 6 patients with solitary FNH underwent MR exiamnation. Dynamic Gd-DTPA enhancement were performed in all the lesions. Of the 6 patients, three underwent CT plain and dynamic contrast scan; one underwent CT plain scan. More attention was payed to the atypical appearances. Results Atypical lesion appearances ineludod:apparent hypointensity on T1 WI and hyperintensity on T2WI,diffusly heterogeneous enhancement in arterial phase, pseudocapsule enhancement in delayed phase;the dynamic contrast MR and CT appearance in each phase were not all similar. Conclusion MR and CT especially dynamic contrast enhancemenl is of great value to the diagnosis of FNH. The atypical appearances of FNH shoud keep in mind to avoid misdiagnosis.

Objective To observe the changes of ischemic preconditioning on the expression of hypoxia inducible fac?tor (HIF)-1αand vascular endothelial growth factor (VEGF) in ischemia hippocampus CA1 region after focal cerebral isch?emia/reperfusion (I/R) in rats, and the mechanisms of brain protection from brain ischemia preconditioning (BIP) thereof. Methods The male SD rats were randomly divided into three groups:sham operation (SO) group,middle cerebral artery oc?clusion (MCAO) group and brain ischemia preconditioning (BIP) group. The MCAO group and BIP group were further divid?ed into six subgroups according to perfusion time after I/R including 2 h, 6 h, 12 h, 24 h, 48 h and 72 h. The ischemia pre?conditioning model rats were established. Immunohistochemistry and Western blot assay were used to observe the expres?sions of HIF-1αand VEGF in ischemia hippocampal CA1 region. Results Neurological function deficit was not observed in SO group. Compared with MCAO group, there was a lower neurological function deficit score in BIP group. In MCAO group and BIP group, the expressions of HIF-1αand VEGF positive cells and protein increased at 2 h after I/R, then gradu?ally increased from 6 h to12 h and reached the maximum level at 24 h, then gradually decreased. The levels were still higher at 72 h than those of SO group. The number of HIF-1αand VEGF positive cells and protein were significantly increased in MCAO group and BIP group than that of SO group (P<0.05). The number of HIF-1αpositive cells was higher in BIP group than that in MCAO group except 2 h and 6 h reperfusion groups. The expression of VEGF positive cells, HIF-1αand VEGF protein were significantly higher in BIP group than those in MCAO group at different time points (P < 0.05). Conclusion Ischemic preconditioning plays a protective role in brain, which may be related to up-regulation of HIF-1αand VEGF.

Objective To explore cognition level on nuclear and radiation in Beijing high school students,which may provide evidence for promoting science popularization on nuclear and radiation.Methods Questionnaire-based survey was conducted in Beijing high school students,randomized cluster sampling was used to recruit study participants.Demographic information was collected,and cognition level on nuclear and radiation was evaluated by questionnaire.Results A total of 1 029 pieces of eligible questionnaires were collected.The correct rate for answering common sense about nuclear and radiation was 58％,with score of boys significantly higher than that of girls (t =4.131,P ＜0.05).About subjective cognition of nuclear and radiation knowledge,87 (8.5％) indicated ' quite clear',779 (75.7％) indicated 'know a little',163 (15.8％) indicated 'know nothing'.There was significant difference in score of common sense about nuclear and radiation among people with various subjective cognition level of nuclear and radiation (J-T =8.279,P ＜0.05).There was a linear correlation between support degree for nuclear power and subjective cognition level of nuclear and radiation (r =0.161,P ＜0.05).There was significant difference in score of common sense about nuclear and radiation among people with various support degree for nuclear power (J-T =7.508,P ＜0.05),whereas those who had got high scores tended to support nuclear power to a higher degree.Conclutions Students knew little about knowledge on nuclear and radiation.It is necessary to strengthen propaganda and education on nuclear and radiation,which may help enhance the students' comprehensive quality,and sustainable expansion of nuclear power more support in the long run.