Objective To introduce the application of polymer material, chitosan, in the cartilage tissue engineering. Methods The recent original articleson the application of chitosan in cartilage tissue engineering were extensivelyreviewed. The biocompatibility and biodegradation characters of chitosan and its application were analysed.Results Chitosan has a high degree of biocompatibility and a favorable chondrogenic characteristic. It can support the maintenance of the phenotypic morphology of chondrocytes besides being used as a scaffold for cell growth. Conclusion The perspect of the application of chitosan in cartilage tissue engineering is hopeful.
目的:探讨住院期间自发性蛛网膜下腔出血患者再出血的相关因素和对策。方法:对42例自发性蛛网膜下腔出血患者住院期间引起再出血的各种相关因素进行分析。结果: 再出血危险因素:34例持续高血压,14例情绪激动,7例下床排便用力,6例剧烈活动,7例睡眠不佳烦燥后出血,4例再出血发生在术前8小时, 4例患者在腰穿时出血。结论: 自发性蛛网膜下腔出血患者住院时高血压和和各种引起血压升高的诱因是引起再出血最主要原因．同时出血时间间隔和住院期间不适当的腰穿也是引起再出血的重要原因。
ObjectiveTo investigate the early effectiveness of arthroscope for femoroacetabular impingement (FAI). MethodsBetween February 2012 and June 2014, 17 patients (17 hips) with FAI were treated under arthroscope. Of 17 patients, 12 were male and 5 were female, aged 18-60 years (mean, 37.2 years); 9 left hips and 8 right hips were involved. All patients had pain in groin for 12-24 months (mean, 15 months), no limited activity of the hip and obvious provocative pain in full flexion and internal rotation. The results of impingement test and the Faber test were all positive. According to X-ray examination, 8 cases were at early stage, 8 cases at middle stage, and 1 case at late stage; according to anatomical morphology, 6 cases were rated as cam-type impingement, 3 cases as pincer-type impingement, and 8 cases as mixed type. Based on impingement type, arthroscopic femoroplasty, arthroscopic acetabuloplasty, and a combination of arthroscopic femoroplasty and acetabuloplasty were performed on 6, 3, and 8 patients respectively. ResultsPrimary healing of incision was obtained. One patient had numbness in the lateral thigh, and symptom disappeared after 2 weeks. All cases were followed up 1-2 years (mean, 1.3 years). All patients obtained obvious hip pain relief. The postoperative Harris scores were significantly increased to 91.44±1.98 at 6 weeks, 95.83±0.53 at 3 months, and 95.33±2.43 at 1 year from preoperative 79.01±3.20(P＜0.05), and the scores at 3 months and at 1 year were significantly higher than that at 6 weeks (P＜0.05), but there was no significant difference between at 3 months and at 1 year (P>0.05). ConclusionArthroscope treatment of FAI can obviously relief hip pain. The key points for acquiring satisfactory early effectiveness are definite diagnosis, early detection, and minimally invasive treatment.