目的:建立红外光谱法对医用脱脂棉、纱布中非法添加的化学合成纤维进行快速鉴别。方法:采用傅里叶变换衰减全反射(attenuated total reflection,ATR)红外光谱法,取表面清洁平整的样品,将其压紧在ATR附件晶体上,直接绘制光谱,与对照品图...目的:建立红外光谱法对医用脱脂棉、纱布中非法添加的化学合成纤维进行快速鉴别。方法:采用傅里叶变换衰减全反射(attenuated total reflection,ATR)红外光谱法,取表面清洁平整的样品,将其压紧在ATR附件晶体上,直接绘制光谱,与对照品图谱进行比对,鉴别样品中纤维的类别。结果:检测的30批医用脱脂棉及30批医用纱布中,有26%的医用脱脂棉发现少量的孤立外来纤维,有40%的医用纱布掺杂了涤纶,其掺杂量为2%~19%。结论:该方法操作简便、快速、高效准确,可用于对医用脱脂棉、纱布中非法添加化学合成纤维的鉴别。展开更多
BACKGROUND： Silicone tube bridging for peripheral nerve defects has been shown to be successful in guiding neural regeneration. However, this method is accompanied by complications. Because materials for bridging ner...BACKGROUND： Silicone tube bridging for peripheral nerve defects has been shown to be successful in guiding neural regeneration. However, this method is accompanied by complications. Because materials for bridging nerve fibers should exhibit biocompatibility, the development of novel artificial tissues to bridge nerve grafts has become important in the field of nerve tissue engineering for the repair of peripheral nerve defects. OBJECTIVE： To investigate effectiveness and feasibility of fascial pedicle artificial nerve tissue to repair peripheral nerve defects, and to compare to autologous nerve grafts and silicone tube bridging methods. DESIGN, TIME AND SETTING： Randomized, controlled, neural tissue engineering-based, animal experiments were performed at the Laboratory of Human Anatomy in Qingdao University Medical College from March 2006 to March 2007. MATERIALS： Medical absorbable collagen sponge was purchased from Henan Province Tiangong BJo-Material, China. Cantata 2-track 4-trace EMG-evoked potential instrument was purchased from Dantec, Denmark. Medical silicone tube was purchased from Shenzhen Legend Technology, China. METHODS： Forty healthy, adult, male, Sprague Dawley rats were randomly assigned to four groups fascial pedicle nerve, autologous nerve, silicone tube, and normal, with 10 rats in each group. A 10-mm defective sciatic nerve section was produced in rats following the removal of the fascial pedicle. The fascial flap surrounding the defect was harvested; one side of the nerve pedicle was maintained and then sutured into a tube with the fascia surface as the pipe inner wail. The tube was filled with a medical absorbable collagen （Bodyin） to construct a bridge between the artificial tissue nerve graft and the damaged sciatic nerve. The sciatic nerve defects in the autologous nerve and silicone tube groups were bridged using autologous nerve grafts and a medical silicone tube with matched specifications. MAIN OUTCOME MEASURES： At 4 months after transplantation, electromyogram was us展开更多
文摘目的:建立红外光谱法对医用脱脂棉、纱布中非法添加的化学合成纤维进行快速鉴别。方法:采用傅里叶变换衰减全反射(attenuated total reflection,ATR)红外光谱法,取表面清洁平整的样品,将其压紧在ATR附件晶体上,直接绘制光谱,与对照品图谱进行比对,鉴别样品中纤维的类别。结果:检测的30批医用脱脂棉及30批医用纱布中,有26%的医用脱脂棉发现少量的孤立外来纤维,有40%的医用纱布掺杂了涤纶,其掺杂量为2%~19%。结论:该方法操作简便、快速、高效准确,可用于对医用脱脂棉、纱布中非法添加化学合成纤维的鉴别。
文摘BACKGROUND： Silicone tube bridging for peripheral nerve defects has been shown to be successful in guiding neural regeneration. However, this method is accompanied by complications. Because materials for bridging nerve fibers should exhibit biocompatibility, the development of novel artificial tissues to bridge nerve grafts has become important in the field of nerve tissue engineering for the repair of peripheral nerve defects. OBJECTIVE： To investigate effectiveness and feasibility of fascial pedicle artificial nerve tissue to repair peripheral nerve defects, and to compare to autologous nerve grafts and silicone tube bridging methods. DESIGN, TIME AND SETTING： Randomized, controlled, neural tissue engineering-based, animal experiments were performed at the Laboratory of Human Anatomy in Qingdao University Medical College from March 2006 to March 2007. MATERIALS： Medical absorbable collagen sponge was purchased from Henan Province Tiangong BJo-Material, China. Cantata 2-track 4-trace EMG-evoked potential instrument was purchased from Dantec, Denmark. Medical silicone tube was purchased from Shenzhen Legend Technology, China. METHODS： Forty healthy, adult, male, Sprague Dawley rats were randomly assigned to four groups fascial pedicle nerve, autologous nerve, silicone tube, and normal, with 10 rats in each group. A 10-mm defective sciatic nerve section was produced in rats following the removal of the fascial pedicle. The fascial flap surrounding the defect was harvested; one side of the nerve pedicle was maintained and then sutured into a tube with the fascia surface as the pipe inner wail. The tube was filled with a medical absorbable collagen （Bodyin） to construct a bridge between the artificial tissue nerve graft and the damaged sciatic nerve. The sciatic nerve defects in the autologous nerve and silicone tube groups were bridged using autologous nerve grafts and a medical silicone tube with matched specifications. MAIN OUTCOME MEASURES： At 4 months after transplantation, electromyogram was us
