BACKGROUND:It remains controversial in term of efficacy for the lightweight mesh and heavyweight mesh in inguinal hernia repair.
OBJECTIVE:To compare the clinical therapeutic effects of lightweight mesh and heavyweight mesh in open methods of inguinal hernia repair with Meta-analysis.
METHODS:Comprehensive electronic search strategies were developed using the fol owing electronic databases:PubMed, Cochrane Library, EMBASE, Medline, Ovid, CNKI, VIP, Wanfang and FMJS. The Literature published before February 2013 was searched. The randomized control ed trials about comparing lightweight mesh and heavyweight mesh in open methods of inguinal hernia repair were included. A data-extraction sheet was developed based on the preset standards. The data from eligible studies were pooled using RevMan5.1 software through Meta-analysis.
RESULTS AND CONCLUSION:Eighteen trials with a total of 4 450 hernias met the inclusion criteria. The meta-analysis showed that there was a statistical difference between lightweight mesh group and the heavyweight mesh group on short-term pain [odd ratio (OR)=0.57, 95%confidence interval (CI) (0.43, 0.74), P<0.05] and a reduced risk of developing foreign body sensations [OR=0.49, 95%CI (0.35, 0.69), P<0.05]. No significant differences were found between the two groups in recurrence rate, testicular atrophy, seroma, hematoma, wound infection, urine retention (P>0.5). According to limited evidence, there are some findings as fol ows:the lightweight mesh is of feasibility, safety and effectiveness for inguinal hernia repair. Because of the limits of sample and quality, more large-sample and high-quality trials are required to make a definite clinical evidence to use lightweight mesh for inguinal hernia repair.

Objective To explore the postgraduate tutor assessment system in order to provide suggestions to improve the quality of postgraduate education. Methods Assessment indexes of post-graduate tutor were screened and assigned by methods of questionnaire investigation, interview, kruskal wallis H-test, taking a total of 109 students and professors in medical colleges in the south-western part as research objects. Results Different populations had different cognitions on the important degree of each index, P<0.05. Primary indexes of assessment system were determined based on the importance of indicators and the influence of different cognitive levels, including tutor personal accom-plishment, teaching ability, scientific research quality and guiding ability (P<0.05). Conclusions Assessment system and method fined by this study covers majority aspects of tutors and can provide feasible suggestions for tutor evaluation.

Objective To assess the safety and efficacy of hypertonic saline in traumatic hypovolemic shock with Meta-analysis.Methods Comprehensive electronic search strategies were developed using the following electronic databases:PubMed,EMBASE,Medline,Ovid、Clinical Trials,CNKI,Wan Fang,CBM and FMJS.The Literature published before August of 2017 was searched.The randomized controlled trials (RCTs) about hypertonic saline in traumatic hypovolemic shock were included.A data-extraction sheet was developed based on the preset standards.The data from eligible studies were pooled through Meta-analysis.Results 9 trials with a total of 1600 patients (741cases in observation group,859 cases in control group) met the inclusion criteria.The meta-analysis showed that the hypertonic saline group displayed remarkable increase in the systolic blood pressure and decrease in hemoglobin level,compared with the isotonic saline group [MD =6.43,95％ CI(1.16,11.70),P ＜0.05],[MD =-5.99,95％ CI (-9.04,-2.95),P ＜0.05].The level of serum sodium [MD =7.94,95％ CI(7.39,8.50),P ＜0.05],serum chloride [MD =9.67,95 ％ CI(8.77,10.57),P ＜ 0.05] and osmolality [MD =18.11,95％ CI (10.73,25.49),P ＜ 0.05] in the hypertonic saline group was increased significantly but acceptable.No significant difference in mortality was found between the hypertonic saline group and the isotonic saline group [OR =0.88,95％ CI(0.69,1.11),P ＞ 0.05].Conclusions Available evidence shows that small volume hypertonic Sodium Chloride saline is safe and effective for resuscitation in patients with traumatic hemorrhagic shock.Since the quality of the inclued studes were not high,more high-quality,multicenter randomized controlled clinical studies need to provide better evidence for the above conclusion.