Résumé
Objective To study the toxicity and physical, chemi ca l and antimicrobial properties of the tracheal catheter made with nanometer anti microbial plastics. Methods For examining the toxicity of the n ew tracheal catheter, 30 Kunming mice were divided into 3 groups. The mice in gr oup A received 2ml of fluid sucked through the catheter by intra-abdominal inje ction, the mice in group B received 1ml of suction fluid, and the mice in group C received 2 ml of normal saline. Multiple proportional dilutions were used to d etect the antimicrobial property of the tracheal catheter against both positive and negative Gram bacteria. Results No noxious effects or toxic ity was found in tested mice, and all the physical and chemical data of the cath eter were up to the National Standard. The catheter showed a certain antimicrobi al effects on some of common pathogenic bacteria. Conclusion Th e tracheal catheter made with nanometer antimicrobial plastics had no noxious ef fects on mice, it showed a certain antimicrobial effects on to some of common pa thogenic bacteria, and its physical and chemical properties were up to the Natio nal Standard.