Objective To investigate the measurement standards and clinical application of observing anatomical morphologies and contractile function of puborectalis muscle on pelvic floor parasagittal plane by endoluminal two-dimensional ultrasonography.Methods The thickness and thickening rate of puborectalis muscle of 78 young nulliparous women were measured on pelvic floor parasagittal plane at three levelsurethral level (anterior),vaginal level (central) and rectal level (posterior),both at rest and during contraction.And the thickening rates of these parts during contraction were compared with each other.Interclass correlation coefficients were calculated to evaluate the consistency of the datas.Results At rest,thickness of anterior part of the left was (9.23 ± 0.20)mm,and that of the right was (8.99 ± 0.20)mm.During contraction,thickness of anterior parts of bilateral puborectalis muscle were significantly thicker than that of central or posterior parts (P ＜0.05).The interclass coefficients were more than 0.93 and 0.83.Conclusions The endoluminal two-dimensional ultrasonography can be used to observe morphologies and contractile function dynamically of puborectalis on pelvic floor parasagittal plane.It is simple,reproducible and worthy of clinical promotion.

Teaching competition is an effective way for college and university teachers to improve their teaching skills. Based on the teaching practice and experience in medical parasitology,this paper discusses several key issues in teaching competition including topics,teaching designs and teaching methods. It provides references for the teachers in department of parasitology of universities and colleges to improve the quality of classroom teaching.

Objective We aim to evaluate and discuss the feasibility of Hyaline imaging of three-dimension sonography in observation of paravaginal support structure in normal nonporous women.Methods Total of 45 normal infertile women were chosen.Three-dimensional volume datasets were collected at rest by transperineal ultrasound.The three-dimensional Hyaline images were acquired off-line.We observed the morphologic features of paravaginal support structure on the axial plane in middle vagina and measured the anteroposterior and lateral horizontal distances between bilateral paravaginal support structure and ureter.The consistency between two sonographers were analyzed by intraclass correlation coefficient (ICC).Results In three-dimensional Hyaline imaging sonogram,paravaginal support structure was appeared as typically tenting-like shaped.The anteroposterior distances between paravaginal support structure and center of ureter were listed as followed:left (-0.31 ± 1.29) mm,right (0.47 ± O.99) mm.While the lateral horizontal distances were left (12.67 ± 6.70) mm,right (13.01 ± 5.75) mm.There were no statistical differences between bilateral both anteroposterior and lateral horizontal distances.The consistency between two sonographers for distinguishing paravaginal support structure on the middle-vaginal plane and measuring distances between paravaginal support structure and center of ureter was remarkably high (ICC is 0.87 and 0.82).Conclusions Hyaline imaging technology of three-dimensional pelvic floor sonography could be used to observe paravaginal support structure in women.The normal paravaginal support structure is typically showed as bilateral symmetrical tenting-like structure,which is on the same level as the center of ureter.It provides normal anatomic radiological evidence and helps study defect of paravaginal support structure caused by pregnancy or delivery.

Objective: To evaluate the effect of sexuality education for parents of preschoolers, to provide a basis for sexuality educational programs in rural settings. Methods: This community intervention trial chose four kindergartens in Jiangyang District of Luzhou City as the intervention group and other four kindergartens in Jiangyou City of Mianyang City of Sichuan Province as the control group. Sexuality education for parents was carried out in the intervention group, and the control group received routine arrangement. The baseline survey was conducted from March to May 2019, and the final survey was conducted in December 2019. The investigators conducted a face to face or self filled questionnaires among each parent who agreed to participate in the survey by using the self designed questionnaire "Research on Current Situation and Countermeasures of Early Childhood Sexuality Education in Rural Areas (Parent)". Results: Before the intervention, there was no significant difference in the basic information of parents and their children, and the situation of early childhood sexuality education between the intervention group and the control group( P > 0.05 ). After intervention, parents of the intervention group and the control group showed differences in correct rate of the knowledge regarding early childhood sexuality education (41.5%，32.1%), proportion of recognition of parental responsibility (90.7%， 81.3 %), sexuality education in the family (55.7%，45.9%), sexuality education in schools (70.2%，39.1%) and attitude behavior consistency (28.9%，16.3%) ( χ 2=4.05，8.05，4.17，42.48，9.59， P <0.05). Conclusion Sexuality education towards parents is effective through improving knowledge, responsibility, the implementation of sexuality education in the family, and attitude behavior consistency among parents.

Objective: To understand the demand of rural parents for children’s sexual education knowledge and associated factors, to provide reference and advise for the development of the children’s sexual education in the rural areas. Methods: In this study,1 015 parents from 16 rural kindergartens in Luzhou City and Mianyang City were selected as the research objects by multiple-stage stratified sampling from March to May, 2019. The self-interview or face-to-face questionnaire survey was used to investigate the demand for children’s sexual education among parents. Results: Totally 81.7%(829) of parents expressed their demand for children’s sexual education knowledge. Multivariate logistic regression analysis showed that age was negatively associated with demand for sexual education of children(OR=0.73,95%CI=0.61-0.88). Junior middle school education background of mothers(OR=2.45,95%CI=1.36-4.41), received sexual education for children(OR=2.85，95%CI=1.84-4.42), reckon sexual education for children as necessary(OR=4.97，95%CI=3.16-7.83)and regarded it as parents’ own responsibility(OR=2.11，95%CI=1.30-3.43) had a high demand for children’s sexual education knowledge(P<0.05). Conclusion Parents in Sichuan rural areas generally have a high demand for children’s sexual education. We should intensify publicity and training about sexual education knowledge among parents in rural areas and attach importance to the cooperation between family and kindergarten in order to jointly promote the development of children’s sexual education.

Objective To investigate effects of Danhong on the serum levels of CD137, high-sensitivity C-reactive protein (hs-CRP) and homocysteine (Hcy) in patients with non-ST elevation acute myocardial infarction complicating metabolic syndrome. Methods A total of 126 patients with non-ST elevation acute myocardial infarction complicating metabolic syndrome were enrolled and randomly divided into a conventional treatment group and a Danhong treatment group using a random-digit table, with 63 patients in each group. All patients underwent angiography or percutaneous coronary intervention. The patients in the Danhong treatment group treated with intravenous Danhong 20 ml on the basis of conventional treatment for 1 week. The serum levels of CD137, hs-CRP and Hcy were measured at hospital admission and 10 days after treatment. The severity of coronary artery disease was assessed by the Gensini-score. Results The levels of CD137, hs-CRP and Hcy in both groups after treatment were significantly lower than before treatment (conventional treatment group: t 12.393, 17.408 and 9.458; Danhong treatment group: t 16.110, 17.573 and 13.481; all P<0.01), and the Danhong treatment group were significantly decreased than the conventional treatment group (t 2.815, 3.224 and 3.157, all P<0.01). The serum levels of CD137 and hs-CRP before treatment were significantly correlated with Gensini scores in 126 patients (r 0.720 and 0.562,all P<0.01). Conclusions The serum levels of CD137 and hs-CRP are significantly correlated with the severity of coronary artery disease, intravenous Danhong may has protective effect for coronary artery disease via decreasing CD137 and hs-CRP.

Objective: To analyze the level of sex-related knowledge and behavior and related factors among children in senior grade of kindergarten in rural areas, and to provide the evidence for early childhood sexuality education. Methods: Multi-state stratified sampling method was adopted. From March to May 2019,a total of 324 students and their parents from 16 kindergartens of rural areas in Sichuan Province were enrolled, self-developed questionnaire was used to collect the basic demographic characteristics, information of sexuality education knowledge and sex-related behavior. Results: The average score of sexuality education knowledge was 5(4,6) point, and the awareness rate was 33.6%(109). The qualified sex-related behavior was observed in 75.0%(243 of all the children), while 25.0%(81) needed to be improved. Multivariate analysis showed that,compared with children were aware of the sexuality education knowledge, children who were unaware of the sexuality education knowledge were more likely to have good sex-related behavior, with the OR(95%CI) value was 2.06(1.14-3.72). The possibility of having good sex-related behavior among those children with more than 2 members in the family parents carring out sexuality education was higher than children without sexuality education in the family, with the OR(95%CI) value being 2.40(1.17-4.89). Conclusion The level of sexuality education knowledge among children in senior grade of kindergarten of rural areas in Sichuan is low, and most children s behavior needs to be improved. Children s awareness of sexuality education knowledge and the number of family members who have carried out sexuality education are related to the occurrence of children s sex-related behavior.

Objective: To investigate the awareness of sexuality education knowledge in kindergarten teachers in rural areas of Sichuan and its influencing factors, and to provide a scientific basis for sex education capacity improvement among rural teachers. Methods: With multi stage stratified cluster sampling method, 162 teachers selected from 16 rural kindergartens in rural areas of Sichuan Province to conduct questionnaires related to early childhood sex education. Results: The awereness of early childhood sex education foreskin care in rural areas in Sichuan was 73.8%. Knowledge regarding foreskin care(58.8%)", "the function of the family includes rest and entertainment functions(65.6%)", "girls need to clean the reproductive truets from the front to back (68.8%)". Multivariate non conditional Logistic regression analysis results showed that teaching experience>4 years(OR=4.16, 95%CI=1.74-9.98), notice of young children with sexual related behaviors(OR=2.97, 95%CI=1.19-7.40), the number of sources of sexual knowledge sources ≥5(OR=3.39, 95%CI=1.42-8.13) were associated with high awareness of preschool sex education knowledge. Conclusion The preschool sex education knowledge awareness among Sichuan rural kindergarten teachers needs to be improved. A variety of sex education channels should be constructed to encourage teachers, especially those who are newly employed, to acquire more relevant knowledge, pay attention to children’s sex related behaviors, and improve their ability in sex education.

Objective:To evaluate the feasibility of Full-stack Smart Pelvic Floor Ultrasound (FSPFU) software in the acquisition and measurement of the minimal levator hiatus (LH).Methods:Transperineal pelvic floor ultrasonography was performed in 119 women of 6-month postpartum from Nov.2020 to Jan.2021 of Shenzhen Second People′s Hospital. Mid-sagittal plane of pelvic floor was set as the initial plane, and the three-dimensional volume data was acquired. The dataset was stored in the machine. The offline volume data was manually adjusted to obtain the minimal LH images and measured by four physicians (two junior physicians as the D1 group and two senior physicians as the D2 group). For comparison, the results were also obtained using the fully automated method—the FSPFU software by a junior physician (the D3 group). The obtained parameters of minimal LH included area, circumference, anterioposterior diameter, transverse diameter, left and right levator-urethral gap distance. Analysis time was recorded for each group. The contours of minimal LH were outlined by three groups and the overlapping rate was calculated. The quality of the resulted images was evaluated and scored by another two senior physicians(A and B) independently.Results:The D3 group had a significant shorter analysis time compared with the other two groups, and the D1 group took a longer time than the D2 group, regardless of the cystocele severity (D1: 82.97 s, D2: 62.51 s, D3: 2.71 s, all P<0.05). The intergroup agreements and correlations of the minimum LH area were good (all ICC>0.85, rs>0.70, P<0.001) and the outlined contours were largely overlapped (>92%). There was no significant difference in image quality among the three groups(all P>0.05). Conclusions:FSPFU software can automatically obtain and measure the minimum LH in an efficient and accurate way, which can improve the effectiveness of the present pelvic floor examination. FSPFU software can be an useful tool in the diagnosis of pelvic floor dysfunctional diseases.

Shengmai Yin (SMY) is a Chinese herbal decoction that effectively alleviates the side effects of radio-therapy in various cancers and helps achieve radiotherapy's clinical efficacy.In this study,we explored the interaction mechanism among SMY,DNA methylation,and nasopharyngeal carcinoma (NPC).We identified differences in DNA methylation levels in NPC CNE-2 cells and its radioresistant cells (CNE-2R)using the methylated DNA immunoprecipitation array and found that CNE-2R cells showed genome-wide changes in methylation status towards a state of hypomethylation.SMY may restore its original DNA methylation status,and thus,enhance radiosensitivity.Furthermore,we confirmed that the dif-ferential gene Tenascin-C (TNC) was overexpressed in CNE-2R cells and that SMY downregulated TNC expression.This downregulation of TNC inhibited NPC cell radiation resistance,migration,and invasion.Furthermore,we found that TNC was hypomethylated in CNE-2R cells and partially restored to a hypermethylated state after SMY intervention.DNA methyltransferases 3a may be the key protein in DNA methylation of TNC.