A randomized,controlled, multicenter contraceptive efficacy clinical trial of the intravas device,a nonocclusive surgical male sterilization

Because of unavoidable complications of vasectomy, this study was undertaken to assess the efficacy and safety of male sterilization with a nonobstructive intravas device （IVD） implanted into the vas lumen by a mini-surgical method compared with no-scalpel vasectomy （NSV）. IVDs were categorized into two types： IVD-B has a tail used for fixing to the vas deferens （fixed wing） whereas IVD-A does not. A multicenter prospective randomized controlled clinical trial was conducted in China. The study was comprised of 1459 male volunteers seeking vasectomy who were randomly assigned to the IVD-A （n = 487）, IVD-B （n = 485） or NSV （n = 487） groups and underwent operation. Follow-up included visits at the 3rd-6TM and 12~ postoperative months, The assessments of the subjects involved regular physical examinations （including general and andrological examinations） and semen analysis. The subjects＇ partners also underwent monitoring for pregnancy by monthly interviews regarding menstruation and if necessary, urine tests, There were no significant differences in pregnancy rates （0.65% for IVD-A, 0 for IVD-B and 0.21% for NSV） among the three groups （P 〉 0.05）. The cumulative rates of complications at the 12th postoperative month were zero, 0.9% and 1.7% in the three groups, respectively. In conclusion, IVD male sterilization exhibits a low risk of long-term adverse events and was found to be effective as a male sterilization method, similar to the NSV technique. IVD male sterilization is expected to be a novel contraceptive method.     

失效模式与效应分析在三级医院标本检验前质量管理中应用研究

目的 应用失效模式与效应分析理论(failure mode and effects analysis, FMEA)提高三级医院细菌培养标本检验前的质量管理。方法 成立院级失效模式与效应分析小组,对标本检验前质量控制中存在的失效模式进行风险评估,通过FMEA分析法确定5项影响质量的失效因子为高风险因子,制定改进措施,比较FMEA实施前后风险优先指数值(risk priority number,RPN)及标本不合格率。 结果 FMEA实施后,标本检验前质量管理5项失效模式的RPN值均显著下降;标本不合格率由0.085%降低到0.046%。 结论 将FMEA应用于标本采集与收送流程质量控制的各个环节,可以有效地提高标本检验前合格率,确保检验分析质量,提高医院风险管理水平。     

Biomaterial characterization of off‐the‐shelf decellularized porcine pericardial tissue for use in prosthetic valvular applications

Fixed pericardial tissue is commonly used for commercially available xenograft valve implants, and has proven durability, but lacks the capability to remodel and grow. Decellularized porcine pericardial tissue has the promise to outperform fixed tissue and remodel, but the decellularization process has been shown to damage the collagen structure and reduce mechanical integrity of the tissue. Therefore, a comparison of uniaxial tensile properties was performed on decellularized, decellularized‐sterilized, fixed, and native porcine pericardial tissue versus native valve leaflet cusps. The results of non‐parametric analysis showed statistically significant differences (p < .05) between the stiffness of decellularized versus native pericardium and native cusps as well as fixed tissue, respectively; however, decellularized tissue showed large increases in elastic properties. Porosity testing of the tissues showed no statistical difference between decellularized and decell‐sterilized tissue compared with native cusps (p > .05). Scanning electron microscopy confirmed that valvular endothelial and interstitial cells colonized the decellularized pericardial surface when seeded and grown for 30 days in static culture. Collagen assays and transmission electron microscopy analysis showed limited reductions in collagen with processing; yet glycosaminoglycan assays showed great reductions in the processed pericardium relative to native cusps. Decellularized pericardium had comparatively low mechanical properties among the groups studied; yet the stiffness was comparatively similar to the native cusps and demonstrated a lack of cytotoxicity. Suture retention, accelerated wear, and hydrodynamic testing of prototype decellularized and decell‐sterilized valves showed positive functionality. Sterilized tissue could mimic valvular mechanical environment in vitro, therefore making it a viable potential candidate for off‐the‐shelf tissue‐engineered valvular applications.     

Visual Inspection with Acetic Acid (VIA) Screening Program: 7 Years Experience in Early Detection of Cervical Cancer and Pre-Cancers in Rural South India

Cervical cancer continues to be a major public health problem in India in the absence of wide spread organised cervical screening programs. Visual inspection of the cervix with acetic acid (VIA) is an effective, inexpensive screening test that can be combined with simple treatment procedures for early cervical lesions, provided by trained health workers. We report 7 years experience in early detection of cervical cancer and pre-cancers using the VIA test in a community-based program in rural Andhra Pradesh, India where there are no existing organised cervical screening programs.

Materials and Methods:

Eligible women aged between 26 and 60 were opportunistically screened by trained health wor kers using the VIA test. Women who tested positive were further evaluated and those with cervical lesions were treated either by cryotherapy in the screening clinic or referred to a higher center.

Results:

A total of 18,869 women were screened by a single round of VIA testing with a positive rate of 10.75%. Biopsy proven high-grade squamous intraepithelials (HSILs) were 90 (0.48%) and low-grade squamous intraepithelials (LSILs) were 43 (0.28%). The overall prevalence of cervical intraepithelial neoplasia (CIN) 2+ lesion rate is 1.05%. A total of 312 (1.65%) cryotherapies were done and 49 women underwent hysterectomy.

Conclusions:

VIA by trained female health workers is a safe, acceptable, and effective test that can save lives from cervical cancer even in remote areas with few resources. These results have important implications for efficient service delivery in cervical screening programs in low-resourced settings.     

糖尿病性视神经病变的检查方法进展

糖尿病发病率越来越高,现代人饮食结构调整,高热量食品摄入过多与此关系密切.目前糖尿病患病率已从2003年的7％增至2010年的14％[1].糖尿病可以引起各种各样的眼部疾病,如角膜溃疡、青光眼、玻璃体出血等.但最常见而且对视力影响较大的是糖尿病视网膜病变和白内障两种.目前对于糖尿病视神经病变(diabetic optic neuropathy,DON)的研究不如对糖尿病视网膜病变(diabetic retinopathy,DR)的研究广泛,DON的临床表现虽不特异,但发生广泛,也是造成失明的重要原因.本文收集目前国内外对DON采用的各种检查手段及早期诊断的依据,尽量对该病做到早期发现,介入治疗,争取良好的治疗效果,本文就各种类型的检查方法做一介绍.