可溶性止血纱布的体内代谢及安全性研究

目的:该研究应用动物试验,评价可溶性止血纱布的吸收代谢和安全性。方法:取KM小鼠,以可溶性止血纱布溶液为试验组,腹腔注射;以同种溶液为对照组,37℃保存。收集尿液与对照样品进行分子量测定;24h时,取代谢产物与原始样品进行红外光谱分析。取新西兰兔,制备肝脏创伤,选用可溶性止血纱布和对照品对创面止血。10d时,检测新西兰兔的血常规和血清生化指标。结果:可溶性止血纱布在小鼠体内被降解,未发现有特征基团的改变;新西兰兔的血常规和血清生化的各项指标均未见异常。结论:在该试验条件下,可溶性止血纱布在KM小鼠体内吸收代谢良好;未见可溶性止血纱布对新西兰兔有明显的毒性作用。     

一种眼巩膜生物补片的制备及生物相容性研究

目的 制备一种适用于眼后巩膜加固术的新型生物补片,通过对其生物相容性进行研究,评价其生物安全性.方法 首先采用新鲜的牛心包经去除表面脂肪组织、脱细胞、扩孔和梳整后,与京尼平进行生物交联,制备出一种眼巩膜生物补片.然后进行体外细胞毒性试验、溶血试验、皮内反应试验、皮肤致敏试验、急性全身毒性试验和植入试验,通过检测细胞存活率、溶血率、皮内反应记分、皮肤致敏反应等级、毒性反应和植入刺激指数分析眼巩膜生物补片的生物相容性.结果 眼巩膜生物补片无细胞毒性反应、无潜在的动物皮内刺激和肌肉刺激作用、无皮肤致敏性和无急性全身毒性反应;溶血率符合要求.结论 通过扩孔和梳整工艺等技术所制备的眼巩膜生物补片具有良好的生物相容性,符合国家相关标准要求,为其在临床上眼后巩膜加固术中的安全应用提供参考.     

可溶性止血纱布对兔肝脏创伤的止血作用

BACKGROUND: Modified cellulose dressing as an important part of polysaccharide hemostatic material has its unique advantages compared with gelatin sponge and fibrin glue. OBJECTIVE: To compare the hemostatic effect and histocompatibility of medical gauze, absorbable hemostatic gauze and soluble hemostatic gauze.  METHODS: After establishment of liver trauma models, 36 New Zealand rabbits were randomly divided into three groups (n=12) depending on different hemostatic materials. Injury wounds were covered with soluble hemostatic gauze (mainly made of sodium carboxymethyl cellulose, experimental group), absorbable hemostatic gauze (mainly made of sodium carboxymethyl cellulose, control group) and medical gauze (normal group), respectively. The gauze was only taken out in the normal group. A hemostasis trial on liver injury was carried out to investigate the bleeding time and bleeding amount. After 1, 3, 7 and 10 days, wound healing was observed histologically in each group.  RESULTS AND CONCLUSION: The bleeding time and bleeding amount in the experimental and control groups were lower than those in the normal group (both P < 0.05), but no statistical difference was found between the experimental and control groups. After 1 day of implantation, the soluble hemostatic gauze was absorbed completely, and the absorbable hemostatic gauze was absorbed with no residual until the 10th day. Experimental and control groups shared similar pathological changes. In these two groups, mild fibrosis and fibrous scar appeared, a better improvement in wound inflammation was shown at 10 days compared with that at 7 days, and the wound gradually healed. In the normal group, there were no obvious lesions except mild tissue edema around the wound. All these findings suggest that the soluble hemostatic gauze has better hemostatic effect and histocompatibility.     

一种国产新型子宫填塞球囊导管的生物相容性研究

目的对一种国产新型的子宫填塞球囊导管进行生物相容性评价,为其在临床上的安全应用提供依据。方法采用体外细胞毒性试验、皮肤致敏试验、皮内反应试验、阴道刺激试验、溶血试验和热原试验等方法,对子宫填塞球囊导管的生物学性能进行评价。结果该球囊导管的细胞存活率为86%,无潜在的细胞毒性;该球囊导管无皮肤致敏性、皮内反应及阴道组织刺激反应;该球囊导管的溶血率为0.3%;家兔的体温升高之和为0.1℃,无热原反应。结论该国产新型子宫填塞球囊导管符合国家相关标准,具有良好的生物相容性,为其临床的安全应用提供了可靠保障。     

羧甲基化棉短绒止血纱布的制备及性能评价

背景:目前棉短绒及其改性制品在清理水或油污染方面受到广泛关注,然而将其用于止血纱布的制备尚未见报道。目的:以棉短绒纱布为原料改性制备一种羧甲基化棉短绒止血纱布,并对其进行表征。方法:以棉短绒纱布为原料,通过化学改性制备羧甲基化棉短绒止血纱布。采用红外光谱仪、扫描电镜和X射线衍射仪表征棉短绒纱布(原料组)、羧甲基化棉短绒止血纱布(实验组)与可吸收止血纱布(对照组)的形貌结构,通过测定吸水率、力学性能、凝胶化速率和溶解性等检测3种纱布的理化指标,通过检测全血凝血时间评价3种纱布的止血性能,通过体外细胞毒性实验评价实验组纱布的细胞相容性。结果与结论:(1)红外光谱显示,实验组纱布发生了羧甲基化反应,纤维结构中引入了亲水性羧甲基基团;X射线衍射结果显示,原料组的晶相较完整,实验组和对照组的晶相不完整,结晶较差;(2)扫描电镜显示,原料组纤维呈直线状且排列整齐紧密;实验组纤维编织方式未发生改变,但排列松散,纤维直径增加,表面粗糙度增加;对照组纤维具有独特的编织方式,纤维表面细长光滑且纹理清晰;(3)3组纱布的孔隙率比较差异无显著性意义(P> 0.05);实验组的吸水率大于原料组(P <...