对实行儿童免疫保偿工作的探讨

<正> 为了提高生产效益.在社会各界进行一系列改革的同时,防病灭病工作根据新形势的需要,如何进行改革使其发挥更大的社会效益和经济效益,笔者就实行儿童免疫保偿对计划免疫工作的强化程度谈点认识:一.对儿童实行免疫保偿的必要性     

维纳滤波器在数字化X射线影像中的应用

介绍了一种简单有效的维纳滤波器设计过程,并采用该过程对数字化X射线影像进行滤波,试验表明:维纳滤波器能在去除图像噪声的同时较好地保留图像细节,具有实际应用价值。     

股骨颈骨折治疗体会

本院从１９８５年１月－１９９２年１２月收治股同颈骨折４５例，分别采用保守疗法及几种不同的手术方法治疗，随访３６例，随访率为８０％，平均随访时间４８．９个月。随访结果，优１４例，占３８．９％。．良９例，占２５％。差１３例，占３６．１％。根据本文结果作者认为６０岁以上的头下型骨折采用人工髋关节置换术好，６０岁以下者应采用多枚螺纹钉内固定加股肌肌蒂骨瓣移植术，对经颈型骨折，可用多枚螺纹钉内固定术，但对移     

老年人急性胆囊炎外科治疗临床分析

目的 总结老年人急性胆囊炎外科治疗的临床经验.方法 对我院2000年～2007年79例老年人急性胆囊炎外科治疗的临床资料进行回顾性分析.结果 79例患者中治愈71例(89.9%),好转7例(8.8%),死亡1例(1.3%).47例(59.5%)并存其他疾病,15例(19.0%)术后出现并发症.结论 选择合适的手术时机,加强围手术期处理,认真分析患者全身情况和局部病变程度,采用个体化治疗是防止术后并发症、降低死亡率的关键.     

去细胞喉支架的制备及喉肌细胞再生的可行性研究

Objective To prepare a deeelhilarized whole laryngeal scaffold by utilizing a perfusion-decellularized technique, reseed cells on it, and construct recellularized laryngeal muscles. Methods Perfusion decelluarized larynxes were obtained by common carotid arterious perfusion with detergents. Then they were performed by macroscopic view, histological examination, scanning electron microscopy (SEM) and cartilage viability. Decellularized laryngeal scaffold were then reseeded with inducted mesenchymal stem cells (MSCs). Composites were transferred into greater omentums of rabbits after one day' s adherence and harvested after eight weeks. Macroscopic view, histological examination and immunohistochemistry were performed. Results Perfusion larynxes became transparent after two hours. Histology and SEM indicated that perfnsion method shewed better deculluarized effect. More ventages and collagen fibers but no intact cell or anclei were retained in the decellularized martrix. Porosity measured by Image pro plus 6. 0 was 80. 4% ± 3.2% (x ± s). Chondrocyte vitality assay indicated chondrocyte vitality rate in the perfusion group was 86. 9% ± 1.5% . After eight weeks, vascularization formed and integrated cartilage frameworks still remained. Histological examination could clearly show the presence of muscle bundles and vessels. Immunohistoehemical examination indicated that sarcomeric-α actin expressed positively in corresponding areas. Conclusions It is feasible to reseed MSCs into the decellularized laryngeal muscle matrix for constructing tissue-engineered laryngeal muscles. This in vivo maturation into the omentum could be the first step before in situ implantation of the construct.     

酒精型气雾杀虫剂的研制及对蚊蝇蟑螂药效观察

目的 :研制一种药效高、气味好、耐腐蚀的气雾杀虫剂 ;方法 :分别测试实验室、模拟现场、现场、贮存稳定性、耐压、耐腐蚀性、毒性试验结果 ;结果 :实验室按 1.0 g/筒喷雾 ,对蚊蝇的 K T50 均小于 1.0分钟 ,对德国小蠊 K T50 为 6.3分钟 ,三种害虫的 2 4h死亡率均达 10 0 ;模拟现场 ,对蚊蝇和德国小蠊分别按 0 .3 g/m3 和5 .0 g/m2的剂量喷雾后 ,三种害虫 1h击倒率和 2 4h击倒率均为 10 0 ;现场试验按 0 .3 g/m3剂量喷药后 ,蚊蝇 10分钟内全部击倒 ,2 4h死亡率均达 10 0 ;药液贮存两年后药效分解率小于 5 ,耐压、耐腐蚀性显示正常 ;毒性鉴定属实际无毒级 ,对眼结膜轻度充血 ,对皮肤无刺激性。结论 :该气雾杀虫剂用食用酒精作溶剂 ,在两年内使用可替代煤油制剂